TROPICS 3 (3/4): 249-276
Issued March, 1994
List of Plant Species Identified in the Northern Part
of the Lope Reserve, Gabon*
Caroline E.G. TUTIN
Centre International de Recherche Medicales de Franceville, Franceville,
Gabon; Department of Biological and Molecular Sciences, University of Stirling, Scotland.
Lee J. T. WHITE
NYZS-The Wildlife Conservation Society, U.S.A.; Institute of Cell,
Animal and Population Biology, University of Edinburgh, Scotland; Programme de Conservation et
Utilisation Rationelle des Ecosystemes Forestiers d'Afrique Centrale (ECOFAC), Composante
Gabon (Projet FED, CCE DG VIII).
Elizabeth A. WILLIAMSON
Psychology Department, University of Stirling, Scotland.
Michel FERNANDEZ
Centre International de Recherche Medicales de Franceville, Franceville,
Gabon; Department of Biological and Molecular Sciences, University of Stirling, Scotland;
Programme de Conservation et Utilisation Rationelle des Ecosystemes Forestiers d' Afrique Centrale
(ECOFAC), Composante Gabon (Projet FED, CCE DG VIII).
Gordon MCPHERSON
Missouri Botanical Garden, St. Louis, Missouri, U.S.A.
ABSTRACT Research on lowland gorillas (Gorilla g. gorilla) and chimpanzees (Pan t. troglodytes)
began at the 'Station d'Etudes des Gorilles et Chimpanzes' in the Lope Reserve, central Gabon, in 1983
and is on-going. This paper lists 676 species of plants belonging to 91 families that occur in the 50 sq. km
study area. Data on trees with diameters of 10 cm or more were collected systematically along line
transects and opportunistic collections of fertile plants were made. For each plant species, the life-form,
habitat preference and density (for trees recorded on transects) are listed. For plants that provide food for
gorillas and chimpanzees, the part eaten is given. The plant species list is not complete but shows the
flora of the SEGC study area to be diverse. The seven habitat types described range from Savanna to
Closed Canopy Forest but the study area is dominated by Marantaceae Forest. Gorillas and chimpanzees
at Lope have diverse diets and obtain food from plants in all of the habitat types. Some minor (in terms of
area) habitats provide large amounts of food in particular seasons. Comparison of ape diets in different
parts of Africa can only advance if vegetation inventories for each study site are compiled and published.
Key words: Gorilla g. gorilla / Pan t. troglodytes / plant species list / habitat-types / vegetation
description / conservation and reserve management
Gabon straddles the equator on the west coast of Africa and approximately 80% of the
country's area of 267,000 km2 is covered by lowland tropical forest. Though still incompletely
documented, the floristic diversity is great and Breteler (1990) estimated that at least 6,000
species of phanerogams occur. The patchy nature of botanical exploration within Gabon is
highlighted by recent descriptions of new species (e.g. Halle, 1987; Halle & Louis, 1989;
McPherson & Louis, 1991) and many new locality records (F. White, pers. comm.). The area
of Gabon that has been most intensively studied is around Makokou, in the north-east of the
* Correspondence and Reprint Requests: Dr. C.E.G. Tutin, C.I.R.M.F., B.P. 769, Franceville, Gabon
C. E. G. Turnq, L. J. T. Wrure, E. A. Wu-unusoN, M. FEnNANDEZ
& G. McRrnsoN
country. Six published lists cover a total of 1,233 plant species (Hall6, 1964;19651' Hall6
I-e Thomas, 1967;1970; Hladik & Halld, 1973; Florence & Hladik, 1980).
&
Research at the Lopd Reserve, in central Gabon, began at the Station d'Etudes des
Gorilles et Chimpanzds (SEGC) in 1983 and is on-going. The focus of much of the research
has been the ecology of lowland gorillas and chimpanzees but this has involved collecting
and identifying plant species eaten by apes and running transects to describe the vegetation of
the apes' habitat. Among the important food species of apes at Lop6 (Tutin & Fernandez,
1993; Williamson et aI., 1990) were two new species of tree (Coln lizae [Sterculiaceae], N.
Hall6, 1987
and Dialiurn lopense [Caesalpiniaceae], Breteler, in press). The discovery of the
former was particularly surprising as it is the commonest tree species within the main study
area and has distinctive, enonnous, leaves (Tirtin et al., t99la). Both of these new species
have restricted geographical ranges suggesting that many undescribed species remain in the
botanically unexplored parts of the country.
Recent work at Lopd has included more syst€matic botanical collecting and an extension of
the enumeration of trees along ftansects. Analysis of these data has allowed the forest within
the Reserve to be classed into 20 types that differ both in structure and species composition
(Whire, 1992).
Similar ecological research, focussing on great apes, is underway at several other sites in
the ropical forests of cenfral Africa (e.9. Carroll, 1986; Fay, 1989; Kano & Mulavwa, 1984;
Kuroda, 1992; Malenky
&
Stiles, 1991; Mitani, 1992; Nishihara, 1992; Yamagiwa et al.,
1992) but comparisons of diets between areas have been hindered by lack of background data
on the variety and density of plant species available as potential foods at each site.
Data on the vegetation ofthe Lopd Reserve are available from several sources, but publi-
cations are limited to a single vegetation type and are not readily accessible (Descoings,
1974; Reitsma, 1988), or are in the form of unpublished Ph.D. theses (White, 1992;
Williamson, 1988). Here we present a list of plant species, identified to at least family, that
occur in the SEGC study area at Lop6. For each species, the life-form and typical habitat is
given and the parts eaten by gorillas or chimpanzees are listed. Density data are included for
all species of tree with diameters at breast height (dbh) > 10 cm recorded on vegetation
transects. The list is certainly incomplete and is biased in favour of habitats well represented
in the SEGC study area, but it provides the basis for inter-site comparisons both of ape
feeding ecology and of botanical inventories.
STUDY AREA
The Lopd Reserve covers 5,000 km2 and extends in a tapering rectangular shape from its
northern boundary, the river Ogoou6 (0'3'S) to Mont Ibondji (l'10'S) between latitudes
11"17'-11o50'8. Altitudes vary from 100-700 m. A chain of mountains runs almost northsouth through the centre of the Reserve and elsewhere the terrain is rugged with numerous
smaller hills and steep valleys.
The Reserve includes a complex mosaic of vegetation types. In the north and east there
are areas of savanna interspersed with gallery forests and isolated forest patches (Figure l;
see also aerial photograph
in Harrison & Hladik, 1986). These savannas are thought to be
natural in origin (Aubreville, 1967; White,1992), dating from the Pleistocene, and active
recolonisation by forest is underway except when arrested by annual burning. Most of the
List of Plant Species Identified in the Lope Reserve
25r
Fig. 1. The Lopd Reserve with
savanna areas (stippled), the
SEGC study area (hatched box)
and the loca-tions of the five 5 km
vegetation transects (Sites 1-5).
savannas are burnt each year for management purposes but some are protected by
watercourses or by their inaccessibility. Within the forest block, areas adjacent to the
savannas have discontinuous canopy cover and a dense unders0orey dominated by herbs of
the Marantaceae and ZingSllrlraceae, classed as 'Marantaceae Forest' (Irtouzey, 1968). This
forest type is thought to be of relatively recent origin, reflecting the re-colonisation of
Pleistocene savannas (Aubreville, 1967; de Foresta, 1990; White,1992). Deeper into the
forest block, canopy cover becomes continuous, plant species diversity increases and the
density of herbaceous plants in the understorey decreases dramatically: this forest type is
classed as 'Closed Canopy Forest'. Within these two major forest types there are smaller
areas of permanent water, rocky outcrops, and areas where the vegetation has been affected
by selective logging in the past. In each of these cases, plant species occur that are rare, or
absent, elsewhere.
The SEGC study area covers about 50 km2(0o10'S, l1o 35'E) of mainly Marantaceae
Forest to the south and west of the savanna zone but extends into Closed Canopy Forest !o
the west of the major mountain range. Parts of the study area were selectively logged between
1960-70. Asinglespecies, Aucoumeaklainearw wasextractedatanaveragedensityof 1.5
trees per hectare and logging occurred in both Marantaceae Forest and Closed Canopy Forest.
is 1506 mm (1984-92). The climate is characterised by a long dry
setson of about 3 months from mid-June to mid-September. Temperatures vary little ovgr the
Mean annual rainfall
year but are lowest during the dry season when constant cloud cover during the daylight
252
C. E. G.
Turnr, L. J. T. Wrrre,
E. A. Wu.unusoN, M. FEnNANDEz
& G. McHunsoN
hours results in low evaporation rates and high relative humidity (Hladik, 1973).
METHODS
Vegetation data presented in this paper were collected during studies with different aims, and
hence methods vary somewhat. White (1992) conducted the most extensive vegetation
survey: five 5 km line-transects were established across major drainage features (c/. NortonGriffiths, 1978) in areas which had experienced different logging histories. Trees and lianes
)10 crn dbh were identified and measured in a strip 5m wide along each ffansect (providing a
sample of 2.5 ha in each area), and Eees 270 cm dbh were similarly enumerated in a stip
50m wide (25 ha in each area). Figure 1 shows the location of the tansects. Sites 1, 4 and 5
were within the SEGC study area, while Sites 2 and 3 were 35 km south-west, in an active
logging concession and, as little information is available on ape diet in this area, these data
are not included here. Williamson (1988) enumerated a sample of 4 ha of ftees )10 cm dbh in
lOm wide snips along a line-fiansect and several elephant paths, selected to sample various
gorilla habitats within the SEGC study area.
In addition to these vegetation samples, systematic collections were made of plant species
consumed by gorillas (Tutin & Fernandez, 1993; Williamson et al., 1990), chimpanzees
(Tutin & Fernandez,'/993), black colobus (Harrison & Hladik, 1986), grey-cheeked
mangabeys (Ham, in prep.), forest elephans (Whit€ et
al., 1993) and other
species
of large
mammal (SEGC, unpublished data). Opportunistic botanical collections have been made of
plants encountered in flower. Voucher specimens are lodged at herbaria at Edinburgh (E),
Libreville (LBV), Kew (K), Missouri (MO), New York (NY), Oxford (FHO), SEGC and
Wageningen (WAG). Nomenclature follows the Flore du Gabon for published families
(N=75) and the Flora of West Tropical Africa for other families, except where stated.
Plant life-forms were defined as follows:
Herb (H): Non woody monocotyledons and dicotyledons both free-standing and climbing, including grasses and
sedges.
Fern F): Members of the Pteridophyta rooted in the ground.
Eptphyticfern (Ep): Pt€ridophyta that re rooted on free trunks or branches.
Treefern (TD: Pteridophyta with rhizome rising like a nee runk.
Palm (P): Members of Palmae family.
Liue (L): Climbing woody plans that depend on other vegetation for support.
SIuzD (S): Woody plants, often with multiple stems that do not exceed 2m in height.
Climbing sftrrD (CS): Woody plants, often with multiple stems that do not exceed 2m height when freestanding but"
Tree
(f):
if
supported by other vegetation, can grow much higher.
Woody plants, usually with single stems, growing to heights in excess of 2m.
Epiphyte (Ep): Woody plants that require sup'port of host early in life but may become free-standing once
tle
host Fee dies.
Parusite (Pa): Plants wholly, or partly, dependent on other plants for nutrients.
The habitat-types used here are broad categories combining vegetation types defined by
White (1992) on the basis of species composition and structure and are defined as follows:
Marantaceae Forasl (MF): The canopy is discontinuous particularly in the middle storey allowing light to
penefiate to the forest floor. The understorey is characterised by dense herbaceous growth of species of
Marantaceae and Zingiberaceae,
Closcd Canopy Forest (CCF): Characterised by more continuous canopy cover, especially in the middle layer
(10-20m). Herbaceous growth in the understorey is sprse,
Forest-savawu interface (F/S): This interface is clear-cut in areas where savannas are subject to annual buming
List of Plant Species Identified in the Lope Reserve
253
if savannas are protected from fire, as,progressive colonisation by woody vegetation occurs.
Certain species of shrubs and trees are particularly common along edges although most also occur at lower
densities in Marantaceae Forest.
but less so
Savanna (S): Areas dominated by Graminae with scattered fire-resistant shrubs.
Rocty (R): Vegetation growing in areas around rocky outcrops where the soil is thin. Trees rarely exceed 30 cm
dbh and while the canopy can be close4 it is generally only 10-20 m high.
Water (W): Marshes and the banks of permanent sEeams.
Distarbed (D): Areas that have suffered disturbance from selective logging or road consfiuction in the recent past.
Foods of gorillas and chimpanzees have been recorded since 1984 from faecal analysis
and observation, see Tutin & Fernandez (1993) and Williamson er al. (199O) for details of
methods.
RESULTS
Species Recorded
Table I lists 676 plant species, belonging to 9l families, that occur in the SEGC study area in
the lopd Reserve. Of these, 509 have been identified to species, 108 to genus and the remaining
59 to family. Each species which is not, as yet, fully determined is given a collection number,
which will be referred to in future publications and updates. For species recorded on fiansects
(i.e., those that reach at least l0 cm dbh), density data are included, but many species were
rare. Rubiaceae was the best represented family in numerical terms, with 90 species, while 30
families were represented by a single species.
At least two species (Mangifura indica and Citrus sp?) are cultivars. Their precise history
is unknown but they are likely to be of ancient origin as from the 15th Century the River
Ogoou6, which is the northem limit of the Lopd Reserve, was a trading route and the savanna
zone has long been the site of human settlement. Young Citrus trees are not uncommon as
gorillas and elephants disperse seeds but Mangifera does not appear to regenerate naturally:
the majority of fruit are consumed by primates before they reach maturity and the remaining
mature seeds are subject to intense predation by bushpigs and rodents.
Life-forms
Of the 676 identifiedplants in Table 1,345 are trees, 113 herbs,55 fems,68 lianes and 63
shrubs. Other life-fonns were represented by fewer than 12 species.
Habitat Preferences
Much of the SEGC study area is Marantaceae Forest (MF) and this forest-type was dominant
in two 5 km transects (Sites I & 5 in Figure l) compared to a single transect where Closed
Canopy Forest (CCD predominated (Site 4). Thus, large tees (> 70 cm dbh) were enumerated
in 50 hectares of MF compared to 25 hectares of CCF and all trees > 10 cm dbh were
enumerated in 5 hectares of predominantly Marantaceae Forest compared to 2.5 hectares of
Closed Canopy Forest. The diversity of tree species recorded in the transect sample in
Marantaceae Forest and in Closed Canopy Forest in the SEGC study area was similar, with
129 and 146 species respectively. However, 130 additional species oftree were recorded on
two 5 km transects in CCF (Sites 2 & 3 in Figure l) 35 km from the SEGC study area (Whire,
1992). This clearly shows that CCF is much richer in tree species than is Marantaceae Forest.
The habitat preference of each species is listed in Table 1. [n cases of multiple habitats,
C. E. G. Turnq, L. J. T. Wmre, E. A.
254
Thbte
WurausoN, M. FEnNANDU &
l. Plant species identified in the SEGC study
LIFE-FORMI
FAMILY / Species
PLANT
G. MCHNNSON
area in the Lop6 Reserve
PART HABITAT3
EATEN2
Gorilla Chimp
DENS ITY (individualsTkmz)a
> 70 cm dbh
> 10 cm
dbh
MF CCF MF
CCF
PTERIDOPHYTA
Adiantum vogelii
Arthropteris orientalis
Aspleniurn
Asplenium
Asplenium
Asplenium
Asplenium
africanurn
emnrginatum
hemitomum
jaundeense
variabile
Blotiella currori
B olbitis acro stichoides
Bolbitis auriculata
Bolbitis gabonensis
Bolbitis heudelotii
Ceratopteris cornuta
Christella dentata
Cyathea camerooniana
Cyclosorus dentatus
icranopteris linearis
Diplazium sammntii
Diplaziwn welwitschii
D
F
F
F
F
F
F
F
MF(w)
F
F
w
w(I!F)
w
F
MF
F
F
F
w
F
Tf
R (ruF)
R (}"tr)
R(lr{F)
R(lvF)
R (MF)
w (ccF)
W(lv[F)
w(I\F)
w
F
F
F
w(lvF)
S
W (l'IF)
F
w (ccF)
Lastreopsis currori
Lomariopsis hederacea
Lomariopsis c ongoensis
Lomariopsis sp. SEGC 536
Lycopodium cernuurn
Lygodium microphyllum
F
w
F (Ep)
CCF
CCF
CCF
Marattia fraxinea
M ic r o gr ammt ow ar ie ns i s
Microlepia speluncae
Microsoriwn punctatum
Nephrolepis biserrata
F
F
F
F
w
F
Nephrolepis undulata
Oleandra distenta
Pellaea doniana
Pellaea holstii
P hynwto s o rus s c olopendria
F
F
F
F/S
F/S
alomelano s
F
F (Ep)
MF
F/S
R (NF)
w(MF)
R (NF)
R(l!F)
R
R
(l'F)
F
Platycerium stemnria
Pteris atrovirens
Pteris similis
Pteris acanthoneuxa
Pteris sp. SEGC 528
S e I a g ine lla c athe dr ifo lia
F (Ep)
MF
F
F
w(MF)
Selaginella myosurus
Selaginella v ersic olor
Selaginella vogelii
c
T ric ho nune s b al
I
F (Ep)
F
F
F/S;MF
s
P iryr o gr amm.e
2
F
See Methods
lardianum
S
F
MF
MF
F
w(Nlr')
F
F
F/S
F
w
F
MF
F
w
for definition of Life-forms;
L= leaf; F=fruit; p= pith; S= seed; FL = flower; B= bark; G- galls;
' See Methods for definitions of Habitat-types;
a
Density of trees calculated from ftansect sample: MF > l0 cm dbh, 5 Ha; CCF > 10 cm dbh,2.5 Ha: MF >70
dbh, 50 Ha; CCF > 70 dbh, 25 Ha (see text). * indicates present as a tree of this size but not recorded in
transect sample.
List of Plant Species ldentified in the Lope Reserve
FAMILY / Species
LIFE-FORM
255
PLANT
PART HABITAT
EATEN
ss
o
T rip I op hy ll urn b uc hho lz
ii
T r ipl o p hy ll wn p r o t e ns um
T rip I op hy
w
F
F
F
F
F
F
F
F
ide s
Trichomanes guineense
Trichomnnes cf. mannii
llwn s e c undifo rme
Triplophyllwn sp. SEGC 469
Triplophyllwn vogelii
Vittaria guineensis
> l0 cm dbh >70 cm dbh
MF CCF MF
Gorilla Chimp
T ric homane s c upre
ITY (i ndividuals/km')
DENS
R
R
w
MF
w
MF
CCF
CCF
F (Ep)
ANGIOSPERMAE
DICOTYLEDONEAE
Acanthaceae
Anisotes mocrophylla
Arystasia gangetica
?DiclipteraUTW 0022
Hypo estes vertic
illaris
Justicia tenella
P s e uder ant
hemum tunic atum
LJTW 0748
LJTW 0910
Anacardiaceae
Antrocaryon klaineanwn
Lannea welwitschii
Mangtfera indica
P seudospondias longifulia
P seudo spondias mic roc arpa
Sorindeia gilletii
Trichoscypha acuminata
Trichoscypln abut
Annonaceae
Artabotry s ? rhopalocarpw
Artobotrys thomsonii
C leistopholis staudtii
Erwntia chlorantln
Hexalobw crlspiflorus
M o runtho taxis
con
M onantho tatcis dec
go ens
is
lina
H
H
s
H
H
H
s
H
T
T
T
T
T
T
T
T
T
T
T
CS
Popowia declina
Uvaria sp. SEGC 253
Uvaria sp. SEGC 256
Uvaria sp. SEGC 262
U v ar ias tr wn p i e r r e anurn
L
L
Xylopia parviflora
Xylopia phloidora
Xylopia quintasii
Xylopia cf. quintasii
Xylopia staudtii
LJTW 0608
R(w)
w
ccF (w)
MF(w)
F
B
F
F
F
F
F
F
F
F
F
F
F
F
MF
w
MF
F
rF
40
2A
6
*
rF
60*
40
460 r20
'F
CCF
200
MF
MF
F
F
F
F
F
F
F
500 200
CCF
R; F/S
CCF
R
:r
F/S
F
F
F
F
F
F
F
CS
L
T
S
T
T
T
T
T
T
T
T
F
MF; R
D
F/S
L
T
T
T
T
Uvariodendron sp. LJTW 0706
Xylopia aethiopica
Xylopia hypolampra
s
MF; F/S
MF; D
L
L
Monodora angolensis
dant hiwn s t audt ii
P olyalthia sunveolens var. gabonica
P olyalthia sunv eolens v at . s runv e olens
P ac hyp o
F/S
F
F
L
F
F
F
F
160
480
*
MF
MF
R
CCF
MF
MF
260
MF; F/S; D
F
480
F/S
MF
MF
MF
M0
:1.
220
2660
200
*
CCF
MF
1440
40
80
20
CCF
256
C. E. G.
Turnr, L.
J. T.
LIFE.FORM
FAMILY / Species
Wrurn, E. A. Wn-uerrasoN, M. FEnNANDU & G. McHtnsoN
PLANT PART
EATEN
HABITAT
Gorilla Chimp
Apocynaceae
Alstonia boonei
Holarrhena floribunda
Landolphia cf . heudelotti
I-,andolphia sp. LJTW 0079
Landolphia sp. SEGC 526
T
T
F
L
L
L
F/S; MF
F/s
D(w)
LJTW 0306
L
MF
LJTW 479
T
r as s a
c
CCF
F/S
MF*
F/S
F/S
F/S
T ab e rnae mont ana
dbh
MF CCF MF
:N(
T
T
T
T
Picralima nitida
Rauvolfia macrophylla
Rauvoffia vomitoria
DENS ITY (indi viduals/km2)
> 10 cm
>70 cm dbh
*
*
*
CCF
40
Aristolochiaceae
P
araristolo c hia flo
s
-
F
avis
Balanophoraceae
Thoninngia sanguinea
Balsaminaceae
Impatiens sp. LJTW 0874
Begoniaceae
Begonia spp. (at least 2 species)
Bignoniaceae
F
Pa
MF(w)
CCF
F/S
MF
MF*
T
Kigelia africana
T
Newbouldia laevis
Spathodea campanulata
Bixaceae
T
F/S
Bixa orellana
Bombacaceae
Ceiba pentandra
Boraginaceae
F/S
Santiria trimera
Caesalpiniaceae
Afzelia bella
Afzelia bipindensfs
Afzelia sp. LJTW 450
Amphimas ferrugineus
Anthonotha ferruginea
Ant hon o t ha mnc r op hy ll a
?Anthonotha sp. LJTW 0641
oc
aly x emnr
40
MF*
Cordia cf. millenii
Burseraceae
Aucoumea klaineara
C anar ium s c hw e infur t hii
Dacryodes buettneri
Dacryodes edulis
Dacryodes klaineana
Dacryodes normandii
Dacryodes sp. LJTW 591
Ap lwn
*
I2O
g i ne
rv at us
Augounrdia letestui
Baikiaea insignis
Berlinia auriculata
Berlinia bracteosa
Calpocalyx klainei
Cassia mannii
Cassia mimosoides
Cassia
Cooaifera
obtusifutin
mildh-aedii
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
FL
FL
F; F/S
F
F
F
F
F
F
F
F
**r1020
520 1160 72
:F
CCF
CCF
CCF
20
(w)
*
*
:F
80
160
*
1600
r20
w (ccFl
w (lv{F) 1S0
T
640
T
H
CS
T
8
I2O
40
T
T
CCF
F/S
4
*
F/S
ccF
F/S
272
40
2160
CCF
CCF
CCF
CCF
MF
MF; F/S
3r2
40
190
F
ccF
3140 640 570
*
*'!
8
S
F/S
CCF
*
*
List of Plant Species ldentified in the Lope Reserve
FAMILY / Species
LIT'E-FORM
257
PLANT
PART HABITAT
EATEN
MF CCF MF
Gorilla Chim
T
T
Crudia gabonensis
Cryptosepalum staudtii
Daniellia klainei
Detariurn macrocarpum
Dialium ?bipindensrs
Dialium dinklagei
Dialium lopense
Dialiwn pachyphyllum
Dialium soyauxii
Dialiwn sp. SEGC 525
D
is
temonant hus benthamianus
D uparquetia orc hidac ea
Erythrophleum ivorense
Eurypetalwn batesii
G ilbertiodendron dew evrei
Guibourtia demewii
Guibourtia ehie
Guibourtia tessmannii
Hylodendron gabunense
Hymenostegia ?klainei
Hymeno s te g ia p e ll e gr inii
Julberrurdia brieyi
Julberrardia seretii
Mezoneuron angolense
N e o c hev alier o de ndron st ep hanii
P ar ab er I i nia b ifo li o
grini
lata
ndr o n dip hy I lwn
S c orodop hlo eus ze nkeri
P elle
o de
Sindoropsis le-testui
Swartzia fistuloides
T e s smannia dew i lde manni ana
T e trab er I inia b ifo I io lat a
LJTW 395
Celastraceae
Ercnymus congolensis
Hippocratea myriantha
Salacia mayumbensis
Salacia sp. LJTW 0308
Salacia sp. SEGC 412
Chrysobalanaceae
Acioa sp. SEGC 499
C hrysobalanw icaco atacorensis
Magnistipula sp. LJTW 0701
Maranthes aubrevillei
Maranthes gabunensis
Maranthes glabra
Parinari excelsa
S;L;BS; L;BF(W)
F/S (W)
T
CCF
T
S; L
MF
T
CCF
TFFCCF
T
F; S; LF;S;LF
TFFCCF
T
CCF
T
F/S
T
L
L;FL F
L
F/S
T
CCF
T
CCF
T
CCF
T
CCF
r
Compositae
Ageratum sp. LJTW 0545
Aspilia africarn
Bidens sp. LJTW 0215
Bidens sp. LJTW 0544
F/S (W)
CCF
F/S;MF
r
ccF (w)
L
TF
T
F/S
r
T
T
L
T
80
rF
4
4
12
4
40
,k*
404
40
208028
300 ,F 2g
*
:r
240
206
rf
*u
40
rF
r20
r2
440
68
10
,F
(F/s)
R
F/S; D
CCF
CCF
rF
*g
r20
F/S
(w)
F/S; F
F
CCF
CCF
L
r6
I 160
40 40
t20
W(l,tr)
T
T
T
T
T
rF
2
ccF
F/S
F/S
S
H
H
H
H
280 160
CCF
CCF
L
L
8
CCF
w
T
T
T
*
40*
r
4
160
ccF (w)
T
TLF
L
L
:F*2
*10
CCF
Combretaceae
Combretum pecoense
Combretum platypterum
C ombretuml P teleopsis sp. LJTW 0369
w (ccF)
TSF
TSF
r
T
T S;L; BS; L; B
CS
CS
CCF
CCF
r
Cynometra ?mannii
DENSITY (individuals&m2)
> 10 cm dbh > 70 cm dbh
CCF
F/S; MF
MF
S
s
MF
S
:F40*g
402002*
'F I20
'F
*g
40
68
C. E. G. Turnq, L. J. T. WmrE, E. A. Wu-ueusoN, M. FENNANDU
258
FAMILY / Species
LIFE.FORM
PLANT PART
EATEN
HABITAT
Launea sp. LJTW 0533
LJTW 0423
LJTW 0494
Connaraceae
Agelaea paradoxa
Agelaea pentagyna
Agelaea sp. 0092
Cnestis corniculata
Cnestis ferruginea
Connarus grffinianus
J olly dora dup arq uetianct
Manotes mncrantha
Rourea myriantha
Rourea solanderi
Rourea tlnmsonii
LJTW 0344
LJTW 0479
Convolvulaceae
I p omo e a b lep lwr op hy ll a
Ipomoea involucrata
Ipomoea mauritiana
Hewittia scandens
Cucurbitaceae
Cogniauxia podolaena
LJTW 0408
Dichapetalaceae
Dichapetalum barteri
Dichapetalurn sp. LJTW 0048
Dichapetalum sp. LJTW 0140
Dichapetalwn sp. LJTW 0414
Tapura bouquetiana
D io s py r o s kamerunens is
Diospyros
Diospyros
Diospyros
Diospyros
Diospyros
Diospyros
Diospyros
mannii
melocarpa
piscatoria
polystemon
soyauxii
stumeolens
viridicans
Diospyros zenkeri
Diospyros sp. LJTW 409
Diospyros sp. LJTW 1004
Erythroxylaceae
Erythrorylum mannii
Euphorbiaceae
Alchornea cordifolia
Alclwrnea hirtella
?Anthostemmn sP. LJTW 0677
> l0 cm dbh > 70 cm dbh
MF
S; MF
D
F/S
L
CCF
F/S; F
F/S; F
F/S
s
ccF
L
L
L
L
L
D
CS
CS
CCF
MF
F
F/S
MF(w)
MF
S
H
H
s
H
D
H
S
L
L
F/S
S
MF
CS
F;L;BF
FFMF
L
L
F
T
T
T
T
T
T
T
T
T
T
T
T
T
T
R
320
lvtF (W)
MF
340
F/S
:F
w
,F
*
FFMF
CCF
CCF
F;S F;S
F(R)
F;S F
F
F
CCF
FF
F;S F;S
F
MF
FFF
LF
F;S F
1140
160
1280
*
*s
60
800
R
R
T
F/S
tl.
F/S
60
S
F/S
CCF
T
w (lvtr)
CS
40
40
240
20
180
T
T
40
D
F
Dilleniaceae
Tetracera podotricha
Dipterocarpaceae
Marquesia excelsa
Ebenaceae
Diospyros abyssinica
Diospyros boala
Diospyros cinnabarina
Diospyros dendo
ITY (individuals/km2)
DENS
S
L
L
L
MCHTENSON
MF CCF MF
Gorilla Chimp
H
H
H
& G.
20
20
{<
240
80
r20
40
40
40
CCF
List of Plant Species Identified in the Lope Reserve
FAMILY / Species
LIFE-FORM
259
PLANT PART
EATEN
HABITAT
dbh
MF CCF MF
Gorilla Chi
Antidesma laciniatwn
Antidesnu vogelianum
Bridelia fercuginea
Bridelia sp. LJTW 0932
?Cleistanthw sp. LJTW 546
Croton sp. LJTW 0348
D
D
glypremne caloneura
uv i gne audia inop i rnt a
is co
Euphorbia thymifolia
g o s sypiifolia
Klaineanthw gaboniae
Macaranga barteri
J atrop hn
he ude I o
H
?F
FF
F
140
tii
Sapium ellipticutn
Thecacoris sp. nov.? GMcP 16015
Uapaca guineensis
Uapaca heudelotii
Uapaca paludosa
Uapaca aff. togoensis
Uapaca vanhouttei
Uapaca sp. LITW 0993
LJTW 526
s
F/S
CCF
F;
MF; D
D
L
LJTW 567
LJTW 0658
LJTW 0661
Flacourtiaceae
Caloncoba glauca
Carnptostylus mannii
Casearia barteri
Homalium letestui
H omnlium ? aff . neur op hy llum
Homalium sarcopetalwn
Hornaliwn sp. GMcP 16169
Lindackeria dentata
Oncoba brachyantlrcra
Scottellia coriacea
Gentianaceae
N eur othec a lo e se lioides
r&
40 280
s
CCF
20
*
D
D
D
240
CCF
CCF
L
F
D
T
T
T
T
T
T
T
T
40
500 1000
t20
CCF
CCF
600
F
FF
F/S
CCF
S
F
F
F
F
F
F
FF
F
F
F
MF
MF
F/S;MF(W)
r20 720
202
20
20*2
CCF (W)
MF(W)
MF(W)
20
*
F/S (w)
CCF
MF
s
80
20
CCF
s (R)
L
FL
MF
F
F
R
160
80
60
MF
w
20
80
r20
tlc
(F/s)
CCF
s
D(r!F)
S
F/S
T
MF
,F
620
s
T
T
T
T
T
T
T
F
**rrk
CCF
280
MF
F/S (w)
CCF
CCF
F/S (w)
2
80
Guttiferae
Allanblackia sp. LITW 272
Garcinia afzelii
Garcinia cf kola
G arc inia cf. ovalifolia
Garcinia sp. LJTW 152
Garcinia sp. LJTW 0447
Garcinia sp. LJTW 0767
2
280
F/S
T
T
T
T
T
T
T
T
T
T
40
rF
CCF
L
T
T
T
T
T
T
T
T
*40
F/S; W; D
T
T
?Phyllanthw discoidew
Plagiostyles africana
ndro n
F
F
S
Macaranga gabunica
Macaranga monctndra
Maesobotrya dusenii
Maesobotrya cf . pynaertii
Manniophyton fulvum
Maprounea membranacea
Mareya micrantha
Mareyopsis longifolia
Phyllanthw diandrus
R ic ino de
T
T
T
T
T
T
T
T
DENS ITY (individual s/km2)
> 10 cm
> 70 cm dbh
r|(
rF
40
:1.
l0
CCF
C. E. G. Tl-rrnr, L. J. T. Wrure, E. A. Wu.r-nusoN, M. FEnNANDEz
260
LIFE-FORM
FAMILY / Species
PLANT PART
EATEN
HABITAT
Mammea africana
Pentadesnwt buryracea
P entade
T
smt grandifolia
Symphonia globuliftra
Humiriaceae
Sac o glottis gabonensis
Hypericaceae
Harungana sp. LJTW 0790
ermum fe b rifu g um
P s o r o s p ermum tenuifo lium
P s o r o sp
Vismia guineensis
Icacinaceae
Icaciru mannii
F;
60
F
S
sia glauc
T
F
CCF
CCF
TF
F
F/S
S
TL
Klainedoxa gabonensis
Klainedoxa trillesii
4
40
S
LD
80
S
D; MF
L
MF
TF
TF
TF
TF
TF
Irtingia robur
,F
'F
40
400
s
S
F
T
esc ens
Irvingia gabonensis
Irttingia grardifolia
CCF
:N(
Irvingiaceae
D esborde
> 10 cm dbh >70 cm dbh
FF
TL
Lasianthera africana
DENSITY (individuals/km2)
MF CCF MF
Gorilla Chimp
TF
T
& G. McHtnsoN
F;
F;
S
S
F
FF
FF
F
F
F
CCF
40
40
160
160 480
220 240
60 40
l0
36
20
4
4
12
tl.
580 80
160 r20
*
32
*
6
20
Ixonanthaceae
O c ht lw c o smus c on g ol
ensis
T
F/S
H
S
,1.
Labiatae
Solenostemon sp. LJTW 0543
Lauraceae
Beilschmiedia fulva
Beilschmiedia sp. LJTW
Beilschmiedia sp. LJTW
Beilschmiedia sp. LJTW
Beilschmiedia sp. LJTW
Hypodaphnis zenkeri
Ocotea gabonensis
T
439
T
T
530
537
T
T
37
40
FF
FMF
ccF (w)
240
240
CCF
TL
MF
MF
T
CCF
T
T
F
20
560
{.
Lecythidaceae
N apoleonaea
imperialis
Napoleonaea cf . leonensis
P e t er s ianthus mac r o c arP us
40
40
T
CCF
CCF
L
F/S
TL
W; D
T
F/S
40
r20
t2
160
Linaceae
Hugonia planchonii
Loganiaceae
Anthocleista vogelii
Ant ho c le i st a ? s c hw einfur thii
Mostuea hirsuta
Mostuea sp. LJTW 0769
Strychnos congolann
Strychnos malacoclados
Loranthaceae
Helixanthera mannii
Lorantha.t sp. LJTW 0119
Tapinanthus sp. LJTW 0444
LJTW 0802
LJTW 0918
LJTW 0979
S
ccF (D)
F/S (w)
L
L
CCF
F/S
Pa
Pa
Pa
MF
?PA
F/S
F/S
F/S
S
Pa
Pa
F
Malpighiaceae
Acr ido c arp us lo n g ifu lius
40
:1.
CCF
CCF
Luxemburgiaceae
Testulea gabonensis
40
D
40
160
10
16
26r
List of Plant Species ldentified in the Lope Reserve
FAMILY / Species
LIT'E-FORM
PLANT
PART HABITAT
EATEN
ITY (individuals&m2)
> 10 cm dbh >70 cm dbh
DENS
MF CCF MF
Gorilla Chimp
CCF
Malvaceae
Hibiscw sp. LJTW 0920
Sida rhombifolia
Urena ?lobata
Melastomataceae
Calvoa monticola
Dissotis congolensrs
Tristemma leiocalyx
LJTW 0023
LJTW 0481
SEGC 319
Meliaceae
Carapa procera
E nt and o p hr a gma c ando I ei
Entandophragma utile
Lovoa trichilioides
Trichilia monadelpha
Trichilia prieureana
Menispermaceae
SEGC 43I
Mimosaceae
Albizia ferruginea
?Calpocalyx sp. LJTW 0611
Cathormion altissimum
Cylic odis cus gabunensis
Dicrostachys cinera
Entada gigas
F illaeop sis disc ophora
Newtonia leucocarpa
Parkia bicolor
Parkia filicoidea
lethra eeweldeana
P entac lethra macr op hy lla
P ip tadenias tr um afric anum
P entac
Samnnea leptophylla
Tetrapleura tetraptera
Moraceae
Dorstenia aff. barteri
Ficw barteri
Ficw bubu
Ficw elasticoides
Ficw ingens
Ficw kimuenzensis
CS
F/S
H
MF
S
S
H
H
H
H
H
D
T
T
T
T
T
T
F
CCF
CCF
F
SMF
MF
F
L
FF
FMF
LF
L
L;
F
F
FL
S
Ep
T
T
T
T
:k
20 80
20*
&0 240
700
40
40
440
:F
FMF
MF
F/S
MF
R (S)
F;
S
B F
S;
MF
F/S; MF
D
L
MF(W)
MF(w)
80*64
*
*
*
4
:F
t4
12
36
30
44
r6
*
MF
FFMF
L;B L
FFMF
L; B; G
8
4
4
R (s)
FFMF
F
F; L F
4
'lc
CCF
FFMF
F;L F
2
6
40
w (ccF)
FFMF
FFF/S
T
T
F
F
F
T
Ep
880
CCF
H
thonningii
,F
F
F
F
variifulia
*
,F
CCF
T
T
T
T
T
T
T
T
T
Ep
Ep
Ep
**
F/S
S (D)
Ficw polita
Ficw pseudomangifera
8
MF
MF
L
rF
:N<
F/S
L
Ep
Ep
Ep
100 600
40
S
T
T
Treculia africarn
MF
T
T
T
T
Ficw mucuso
Ficw ovata
Ficns sp. SEGC 443
M ilic ia (C hlorophora) excelsa
Musanga cecropioides
Myrianthus arboreus
D
L
Ep
recuryata
sur
MF
LL
Ficus macrospertnct
Ficw
Ficw
Ficw
Ficw
S
S
262
FAMILY / Species
LIFE-FORM
PLANT PART
EATEN
HABITAT
MF CCF MF
Gorilla Chimp
Treculia obovoidea
Myristicaceae
ho c ep
haliwn
oc
T
CCF
T
hoc oa
Staudtia gabonensis
T
T
S;L
s
T
s
T
FF
F
F
F
CCF
CCF
CCF
200
CCF
Coelocaryon prewsi
Pycnanthus angolensis
S cyp
DENSITY (individualsftm2)
> 10 cm dbh >70 cm dbh
*
360
140 r20
20
*
920
200
M28
6
**
r72
Myrtaceae
Psidium guineense
Syzygiwn sp. LJTW
3l
Syzygiurn sp. LJTW 0147
SyzygiwnlEugenia sp. LJTW 0381
Nymphaeaceae
LJTW 0815
Ochnaceae
C ampy I o s p
e
r murn el o n g atwn
Lophira alata
Ouratea
flava
Ouratea cf . myrioneura
?Ouratea sp.LJTW 0432
R lnb dop hy ll wn c al o p hy I I um
Sauvagesia erecta
LJTW 0772
LJTW 0882
Olacaceae
Coula edulis
Diogoa zenkeri
Heisteria pan ifulia
Ongokea gore
P ty c ho p etalum p e t io lat wn
Strombosia pustulata
Strombosia zenkeri
Stromb o siop sis tetrandra
s
MF
,1.
2
CCF
CCF
w (s)
T
T
T
T
T
T
MF
F/S; MF
F/S; MF
F/S; MF
MF
MF
H
s
S
CCF
S
S
T
T
T
T
T
T
T
T
CCF
CCF
F;
L
FF
F
L
2740 'F
*
1760
60
*r
60
CCF
CCF
CCF
CCF
8
:1.
r20
F
F
90
24044
80 14
12
160
r20
400
2720
2000
100
2720
Oleaceae
Linociera aff . mannii
Oxalidaceae
F/S
Biophytum petersianum
Biophytum talbotii
Pandaceae
H
H
w(R)
Centroplacw glaucinw
T
T
F
Panda oleosa
S
CCF
20'k**
Papilionaceae
Aganope impressa
Aganope sp.
L
L
Crotularia pallida
Dalbergia aff . rufa
s
L
CCF
MF
S
L; B; FL
F/S
e s mo diurn ramo s is s imum
Desmodiurn scorpiurw
Eriosema glomeratum
H
H
S
s
Erythrina tholloniana
T
w
H
s
Lep to derr is hyp ar gy re a
L
F/S
Milleuia
Millenia
Milleuia
Milleuia
T
T
T
T
D
I ndigofera
c
onj ugata
v ar
. occ identalis
laurentii
sanagana
conraui
sp. LJTW 0038
Platysepalum sp. LJTW 0603
Pterocarpus soyawcii
S
S
L;B
L
T
(NrF)
CCF
L
F/S
F/S
40
MF(w)
20
CCF
S;L;FL
S;I
F
80
240
:rc 68
20
263
List of Plant Species Identified in the Lope Reserve
LIFE-FORM
FAMILY / Species
PLANT PART
EATEN
HABITAT
Uraria picta
Zornia latifulia
LJTW 0469
LJTW 0591
LJTW 0599
LJTW 0,602
LJTW 0609
LJTW 0720
LJTW 0950
SEGC 395
Passifloraceae
Barteria fistulosa
Paropsia grewioides
LJTW 0360
Anopyxis klaineana
Cassipourea congensis
Poga oleosa
Rubiaceae
Aidia ochroleuca
Atractogyne gabonii
Bertiera batesii
Bertiera mildbraedii
Bertiera sp. LJTW 0139
Borreria pusilla
Brenania brieyi
Canthiwn sp. LJTW 0297
Cephaelr sp. LJTW 0202
S
S
F/S
L
L
L
CCF
CCF
S
F/S
L
MF
T
T
F/S; MF; D
F/S; R
CCF
CCF
ccF (w)
T
T
T
T
R
CCF
T
F/S
L
MF; D
S
w (ccF)
T
MF
S
CCF
H
s
T
MF
CCF
Corynanthc mayumbensis
T
F
Crossopteryx febrtfuga
D ic ty andra arboresc ens
Diodia scandens
Feretia sp. LJTW 0646
s
S
T
MF
MF
Nauclea latifolia
Nauclea vandergrchtii
Oldenlandia corymbosa
O lde nl and.i a I anc ifo I ia
Otomeria guineezsis
Otomeria micrantha
Oryanthus unilocularis
?Oryanthus sp. LJTW 0903
Pauridiantha aff . dewevrei
Pauridiantha efferata
P aur idiant lrc fl o r i bunda
H
s
F/S
S
CCF
H
MF
T
T
T
F(w)
D
F
H
S
T
B; L
w
L
L
L
F
D
D
T
T
T
F
F
H
s
H
H
T
T
T
T
T
:F
520
CCF
F
F/S
1
80
40
40
320
ccF
T
T
T
S
Heinsia crinita
Leptactirn cf . arnoldiana
Massularia acuminata
Mitacarpus scaber
Mitragyru ciliata
Mwsaenda cf . debeawii
Mussaenda cf . tenuitlora
M ussaenda pp. LJTW 058
Nauclea didderrichi
CCF
S
s
?Gaertnera sp. LJTW 0316
Geophila afzelii
s/km2)
MF CCF MF
H
H
H
L
Rhizophoraceae
Anisophyllea sp. LJTW 0475
ITY (i ndividual
> l0 cm dbh > 70 cm dbh
Gorilla Chimp
Tephrosia purpurea
DENS
MF
F
F
F
F
F
s
w
*
600
80
4
:1.
,F
180
rF
340
2240
40
80
r20
20
600
60
S
s
MF
s
F/S
MF
F/S
D; F/S
D; F/S
*
*
220
100
r20
t6
2&
C. E. G.
FAMILY / Species
Turw,
L. J. T. Wru'rE, E. A. Wu.uausoN, M. FEnNANDEZ & G. McPrfiRSoN
LIFE-FORM
PLANT PART
EATEN
HABITAT
Gorilla Chimp
Pausinystalia johimbe
P aus iny stal ia mac ro c er as
Pavetta hispida
T
Pavetta aff . viridiloba
Pavetta sp. LJTW 0006
Pavetta sp. LJTW 0205
?Pavetta sp. LJTW 536
Porterandia cladantha
T
H
Pseudosabicea batesii
P s e u^do s ab i c e a fl or ib unda
F20
MF
T
S
L
MF
L; FL
F;
L
F
MF
D; MF
H
CCF
L
D
D
tria p e dunc ulari s
Psychotria vogeliana
Psychotria sp. LJTW 0012
S
MF
s
F/S
Prychotria
Psychotria
Psychotria
Psychotria
LJTW 0l7l
sp. LJTW 0174
sp. LJTW 0209
sp.
LJTW 0638
Psychotia
sp.
LJTW 0657
sp.
T
F/S
S
CCF
CCF
H
S
MF
MF
S
CCF
S
Rothmannia whitfteldii
Rutidea dupuisii
Sabicea efulenensis
Sabicea mollis
S ac o sp errna p anic ulatum
Tarenna conferta
Tarenna eketensis
Tarenna sp. LJTW 0272
Tricalysia anomala
T ric aly s ia mnc r o p hy ll a
Tricaly sia cf oligoneura
T
MF
L
L
L
L
F
T
D
L
F/S
T
T
T
CCF
S
Tricalysia cf . pallens
Tricalysia sp. LJTW 0081
Tricalysrc sp. LJTW 0082
s
MF
MF
S
ccF (w)
Trichostachys aurea
H
MF
MF
Uncaria africana
LJTW 0098
L
F/S
T
D
LJTW 0372
s
MF
LJTW 0396
LJTW 0417
T
CCF
s
MF
LJTW 0433
S
ccF
LJTW
LJTW
LJTW
LJTW
LJTW
T
R; W (F/S)
0638
s
MF
0642
T
rrF (w)
0646
S
F/S
0662
T
T
T
T
T
T
T
0628
LJTW 140
LJTW I7O
LJTW 387
LJTW 514
LJTW 528
LJTW 566
SEGC 288
SEGC 291
SEGC 508
Rutaceae
Araliopsis sp. LJTW 353
Citrus sp. SEGC 557
20
40
120
:F
MF
MF
F/S
D
MF(W)
S
',rc
S
MF
40
D
40
40
40
CCF
CCF
CCF
MF
L
L
F
MF
F
D
s
L
MF
T
T
20
F/S
H
P sy c ho
200
CCF
ea mildbraedii
P seudo sabic
dbh
MF CCF MF
CCF
S
T
T
DENS ITY (individual s/km2)
> 10 cm
> 70 cm dbh
ccF
F/S
20
80
CCF
List of Plant Species Identified in the Lope Reserve
FAMILY/Species
265
LIFE-FORM PLANTPART HABITAT DENslTY(individuals/km2)
EATIN
Chimp
)
Gorilla
Fagara?macrophylla
Fagara tessnunnii
Tecleaaff.verdooniana
Vepris cf. lonsii
T
T
T
T
MF
CCF
R
R
F/S;
l0 cm dbh > 70 cm dbh
MF CCF MF CCF
!8
40
*
20
Sapindaceae
Blighiawelwitschii
Chytranthus talbotii
Eriocoelwnmatocarpwn
Eriocoelutn?paniculatwt
Eriocoelwn sp. UTW 132
Ganophyllwn gigannrmt
Lecaniodiscuscupanoides
Placodiscuscf.opacus
T
T
T
T
T
T
T
T
MF
r.
MF(W)
MF
MF
MF
MF
MF
CCF
F/S;
F
F
Sapotaeae
Baillonella
toxisperma
T
F
Donellaogowewis
T
F
Donclla?prmiformis
T
Gambeya africana
T
F
GambeyasubnudaTFFF*40**
?Lectomedoxn sp. LJTW 237
T
Letestua dwissima
T
ManilkarafouilloyaruTFFCCFlF
OmplalocarpwnprocerwnTF**:r*
PachystelabrevipesTFFR**
LITW 0228
T
F
F
F
F
F
F
F
540
'*
n
80
carnporurn
H
*
Z0
100
g0
,& 40
CCF
F/S
CCF
CCF
*
MF
MF
*
*
Z
4
!r
g
{.
g0
CCF
40
2
4
160
Scrophulariaceae
Cycniwt
280
,&
S
Scytopetalaceae
Scytopetalwt sp. IJTW
Simaroubacrae
0017
gabonewis
gricana
Odyendyea
Qwssia
Solanaceae
Schwenckia
americana
Sterculiaceae
Cola lizae
Colanahoundensis
Colasp. SEGC 332
Lepnnychia echinocarpa
Nesogordoniapapaverifera
Pterygota?bequaertii
Scaplapenh,trnblackii
Sterculia tagacantln
T
F
F
F
T
S
F
H
S
T
T
T
S
T
T
T
T
l2O U0
CCF
F
F; L; p
MF
CCF
(W)
MF
MF
L
F
CCF
CCF
MF
Styracaceae
Afrostyrax
lepidopltyllus
T
CCF
S
S
S
CCF
'*
7460
g
g0
*
*
*
:r.
'*
:*
40
160
2
g0
Thymelaeaceae
Dicranolepis buchlalzii
?Diuanolepis sp. LJTW
Octolepis
decalepis
MF
MF
Tiliaceae
Clappertonialicifulia
Duboscia ma$ocarpa
Triwrfetu cordifolia
H
T
S
F;
S
S;
F;
S F
D
Ulmaceae
Celtistessnannii
Celtissp.LnW 444
T
T
40 l2O
2
*
* 200
g
2g
S
F;L F
F
CCF
40
266
C. E. G. TUrNq, L. J. T. Wru.re, E. A.
LIFE-FORM
FAMILY / Species
PLANT PART
EATEN
WnunusoN, M. FEnNANDEZ & G. MCHmnSoN
HABITAT
F
T
T
Rinorea ilicifulia
Rinorea sp. LJTW
Rinorea sp. LJTW
Rinorea sp. LJTW
Rinorea sp. LJTW
Rinorea sp. LJTW
Rinorea sp. LJTW
Vitaceae
Cissru aff. barteri
Cisszs dinklagei
Cissns leonardi
0055
0132
022I
F/S
CCF
S
CCF
T
T
T
w (ccF)
w (ccF)
w (ccF)
*
40
r20
CCF
CCF
S
L
L
L
80
w(MF)
T
s
0596
0656
0899
ITY (individuals/km2)
> l0 cm dbh >70 cm dbh
MF CCF MF
Gorilla Chimp
Verbenaceae
Vitex doniana
Vitex ?rivularis
Violaceae
DENS
F;L
F
F
D
F
MF
Vochysiaceae
CCF
Erismadelphw exsul
MONOCOTYLEDONEAE
Agavaceae
Dracaena fragans
Dracaena sp. LJTW 0916
Sansevieria sp. SEGC 565
T
CCF
s
H
F
R
Amaryllidaceae
MF
Scadoxus cinnabarinus
Araceae
Anchomanes dffirmis
Nephytis sp. LJTW 0480
H
L;P
F
H
w (ccF)
H
H
H
H
MF
MF
MF
MF
H
H
H
H
H
H
H
S
H
H
H
H
H
H
H
H
H
H
H
H
H
S
Commelinaceae
Aneilema beniniense
Commelina capitata
Palisota ambigw
Palisota sp. SEGC 551
Cyperaceae
Bulbostylis cf. densa
Bulbostylis laniceps
Fimbristylis pilosa
Pycreus sp. LJTW 0526
Scleria boivinii
LJTW 0131
LJTW 0407
S
S
S
F/S; D
w(MF)
D(w)
Gramineae
Andr op o g o n fas
t
ig
iatus
eudapr
Axonopus compressus
Andr
op o g o n p
s
ic
w
Brachiaria jubata
Centotheca lappacea
Hyparrhenia diplandra
Olyra latifulia
Oplismenw hirtellus
Panicurn dregeanum
Panicum grffinii
Panicurn cf . walense
Panicum sp. LJTW 0152
Panicu.rn sp. LJTW 0208
Pospalum paniculatwn
P ennis e twn po ly s tac hy on
S
S
S
MF
s
MF
MF
S
S
S
w (ccF)
H
MF
D (MF)
H
S
40
CCF
List of Plant Species Identified in the Lope Reserve
FAMILY / Species
267
LIFE-FORM PLANT PART HABITAT
Gorilla Chimp
Peratis indica
Pobeguinea arrecta
S c hiz ac hy rium p I aty p hy ll um
Sp or ob o
lus py rarnidalis
Streptogynn crinita
LJTW 0388
LJTW 0404
LJTW 0540
DENS ITY (indi vidual s/km2)
> 70 cm dbh
> 10 cm
dbh
MF CCF MF
EATEN
H
H
H
H
H
H
H
MF(w)
H
S
H
S
S
s
s
S
MF
S
Liliaceae
Curculigo pilosa
Marantaceae
Ataenidia conferta
Halopegia azurea
H aunwnia liebr e c hs tiana
Hyps elodelphy s hirs uta
Hyp s el o de lp hy s p o g ge ana
Hyps elodelphy s vio lac ea
M ar anto c hlo a c o rdifo li a
Marantochloa filipes
Marantochloa purpurea
M e gap hry niwn mac r o s t ac hy um
Megaphrynium velutinum
T rac hy p hry niwn braunianurn
Palmae
Calamus sp. SEGC 554
Elaeis guineensis
Eremospatha cabrae
Podococcus barteri
Raphia sp. SEGC 555
Pandanaceae
Pandanar sp. SEGC 556
Pontederiaceae
H e t e rant he
H
H
H
H
H
H
H
H
H
H
H
H
LLF
P
w
S;L S;L F
S;L S;L F
S;L S;L CCF
S;L S;L F
L;P
w
PF
L;P
w
F;L;PF;T F
F;L;PF;L F
PW
L;
P
P
P
P
P
P
F; L; PF; P
F;
F/S; MF
F/S; MF
MF
CCF
w
(s)
w (s)
ra c all ifo lia
W (I,F)
Smilacaceae
Smilax kraussiana
F/S
Zingiberaceae
Afr amomum I o n g ip e ti o I at um
Afrarnomum sp. ?nov SEGC 152
Aframomum sp. SEGC 239
Afrarnomurn sp. SEGC 323
Costw afer
Renealmia cincinnata
Renealmia macrocolea
H
H
H
H
H
H
H
P F; P
P F; P
F;P F;P
F;P F;P
PPMF
PF
PPF
F;
F;
F/S
MF
F
CCF;D
180
CCF
C. E. G.
TurN, L. J. T. Wrurg, E. A. Wu-ueusoN, M. FEnNANDU &
G. MCHUNSON
the predominant one is marked first. Of the 676 plant species identified at least to family, 149
occur principally in MF and 152 in CCF. No obvious habitat preferences were found for 90
species (designated as 'Forest' (F) in Table 1) that occur both in MF and in CCF. One
hundred and thee species are found primarily close to the foresVsavanna interface, and 67
(including 23 Graminae) occur only in savannas. Smaller numbers of species were found to
be associated with water (53); with areas disturbed by past loggrng activities (34); or with
rocky outcrops within the forest (28). If these species occur only within a specific habitattype, this is indicated in Table l, e.g.R (MF) indicates a species found close to rocky
outcrops in Marantaceae Forest; and W (CCD, one associated with water in Closed Canopy
Forest.
l0 commonest species in Marantaceae Forest and Closed Canopy
Forest in terms of basal area and stem density. only two fiee species are arnongst the top ten
for basal area in both forest types and only one species figures among the ten commonest in
Table 2 compares the
terms of stem density in both forest types. These data emphasise the differences between the
two major forest types in terms of species composition.
Foods of Gorillas and Chimpanzees
Of the 676 species recorded in the SEGC study area, 27Vo ptovide food for either
chimpanzees or gorillas, or both. Some families provided no, or few foods, e.g., Pteridophyte
(0 of 55 species) and Connaraceae (l of 13 species) while other families provide food
consistently e.g., Marantaceae (12 of 12 species) and Moraceae (15 of 21 species). Data on
Table 2. Top 10 species in Marantaceae Forest and Closed Canopy Forest at
Lop6 in terms of basal area and stem density
Family
Species
Aucoumea klaineana
Cola lizae
Lophira alata
entaclethra mac rop hy lla
Dacryodes buettneri
P entaclethra eetveldeana
Diospyros polystemon
P
Hylodendron gabunense
Xylopia quintasii
Pycnanthus angolensis
Trichilia
cf
.
prieurearut
Rank (No. Stems)
CCF
MF
2
2
I
3
3
Mimosaceae
4
9
Burseraceae
5
Mimosaceae
6
r0
Ebenaceae
Caesalpiniaceae
7
5
Annonaceae
Myristicaceae
1
8
8
9
10
Meliaceae
Olacaceae
Ebenaceae
Diospyros zenkeri
Ebenaceae
Maprounea membranacea
S cyp hoceplnlium o c oc hoa
C entroplac us glaucinas
Xylopia aethiopica
Euphorbiaceae
Myristicaceae
Santiria trimera
Coula edulis
Augounrdia letestui
Burseraceae
Olacaceae
Caesalpiniaceae
Caesalpiniaceae
Olacaceae
Sindoropsis le-testui
Strombosia zenkeri
Cy licodiscus gabonensis
Dialium soyawcii
MF
Burseraceae
Sterculiaceae
Ochnaceae
trombosiop s is teff andra
Diospyros dendo
S
Area)
CCF
Rank (Basal
l0
Pandaceae
I
Annonaceae
7
Mimosaceae
Caesalpiniaceae
9
3
4
5
5
6
6
8
10
List of Plant Species Identified in the Lope Reserve
269
Table 3. Number of species of ape foods in different habitat-types at Lopd
Habitat-type
No
Species
Gorilla Food Species
Number
Percen
Chimpanzee Food Species
Number
Perce
Marantaceae Forest
r49
42
28.2
36
Closed Canopy Forest
Forest
r52
r7
rt.2
2l
13.8
90
53
58.9
50
55.6
Forest/savanna edge
Savanna
103
22
2r.3
l9
18.4
67
53
34
28
3
4.5
9
6
6
r7.0
3.0
3.7
2r.4
2
2
4
6
21.4
676
158
23.4
r40
20.7
Water
Disturbed areas
Rocky areas
TOTAL/AVERAGE
17.6
24.2
I 1.8
ape feeding have been collected by faecal analysis and observation over ten consecutive years
but new foods are still being discovered. Some of the newly recorded foods come from rare
species, or from species which fruit irregularly, but others are parts of common species that
are ealen only in unusual circumstances, e.g. when major fruit crops fail, or when apes range
in atypical habitats such as savannas.
Table 3 shows the vegetation types in which plants that provide foods for gorillas and
chimpanzees primarily occur. Both gorillas and chimpanzees feed from plants in all of the
habitat-types. Foods from species found exclusively in Closed Canopy Forest are undoubtedly
under-represented as areas of CCF are on the edges of the study area and less time was spent
collecting data on ape ecology in this vege0ation type. Few foods are provided by savanna
species but a fifth of the species found at the forest/savanna interface provide food for apes.
Both gorillas and chimpanzees eat parts from plants associated with rock outcrops and those
colonising disturbed areas, but gorillas find more foods from the flora associated with
permanent water. Had this latter category been divided into 'marsh' and 'riverbank',
chimpanzees would have emerged as having no food-plants in swamps while gorillas do feed
on herbaceous and woody plants that grow in standing water. This reflects the general
avoidance ofwater by chimpanzees.
DISCUSSION
Species Recorded
The 676 species listed in Thble
I show the flora of the SEGC study area to be diverse but the
list is far from complete. The transect samples were biased with respect to habitat-type as
most were located in Marantaceae Forest. This forest type is dominant in the north of the
Reserve, close to the savannas but the more botanically divene Closed Canopy Forest is the
predominant forest-type in the Reserve. This bias means that the species listed in Table I
should not be considered as representative of the Lopd Reserve as a whole. To date, a total of
864 species have been recorded for the Reserve but the southem half remains botanically
unexplored.
Another source of bias is by life-form: Only tees and lianes with a dbh of l0 cm, or more,
were included in the systematic transect enumerations, thus our data on herbaceous plants,
shrubs and smaller lianes come from opportunistic collecting. The large number of
Pteridophytes recorded (55 species) reflects two collecting
rips by a specialist, but is far from
complete (N. Mundy, pers. comm.). Reitsma (1988), working in the Lop6 Reserve 30 km
270
C. E. G. Turnq, L. J. T. Wrure, E. A. Wu-unusoN, M. FEnNANDEz
& G. McHmnsoN
south-west of the SEGC study area, recorded 69 species of tree of dbh < l0 cm in a one
hectare plot and 125 species in 0.02 hectares where all plants were enumerated. Of the
species recorded by Reitsma in the small plot,247o were Eees, 187o shrubs, l87o lianes and
4OVo lrerbs. This compares to 5lvo tees, 9Vo shrubs, 107o lianes and 25Vo herbs (including
fems) in our sample. An assumption of equivalent distribution of life-forms at the two sites at
Lop6 seems reasonable and this suggests that the species listed in Thble I represent about half
of the total divenity of the SEGC study area: If all tree species have been identified the 345
species represents 24Vo of the total plant diversity, equal to about 1,400 species. Tlvo decades
of botanical collecting in the Makokou area of Gabon resulted in identification of 1,233 plant
& Hladik, 1980) giving support to the above extrapolation.
Of the 509 completely identified species, two were previously undescribed: Cola lizae,
Sterculiaceae (Hall6, 1987) and Dialiurn lopense, Caesalpiniaceae (Breteler, in press). At
least two other species of the 618 identified to genus are believed to be new: Aframomum
SEGC #152, Zingiberaceae (J.M. Lock, pers. comm) and Thecacoris GMcP #16015'
Euphorbiaceae. Among the fully identified species there are many new records for Gabon,
e.g. of 13 Ficus (Moraceae) species, two are new country records (Betg et al., 1984); and of
the 16 species of Diospyros (Ebenaceae) two af,e new records for Gabon (ktouzey & White,
1970), including D. polystemon wlichis the fifth commonest tree, in terms of stem density, in
species (Florence
Marantaceae Forest (Table 2).
Habitat-Preferences
Most plant species were found to occur only, or in much greater abundance, in one particular
habitat-type (see Table l). Dfferences between habitat-types are defined by many factors,
principally the amount of available light and water and the quality of the soil. Species that
grow only in, or beside, permanent water appear to need the water but species associated with
the poor soil of rock outcrops may not prefer this habitat but may be limited to them by an
inability to out-compete other species on richer soils. similarly, woody plants that grow in
savanna habitats are not only tolerant of exposure to sunlight but are also resistant to fire, as
annual burning by humans has been a recurring event for several thousand years (Oslisly &
Fontugne, 1993).
The major difference between MF and CCF, the two dominant forest types recognised in
this study, is that more light reaches the ground in the former because of the discontinuous
canopy. This undoubtedly affects the species composition of the understorey herbs and
shrubs, but the lower tree species diversity
of MF may simply reflect its relatively recent
origins.
In the savannas in the north of the SEGC study area, species of Graminae are ubiquitous
and only four species of shrubs occur in abundance (Nauclea latifulia, Crossopteryx
bark, or the
febrifuga, Psidium guineensis, Bridelia ferruginea). These have fire-resistant
capacity for rapid re-glowth ftom root stock after the annual burning. In the savanna zone'
gallery forests gtow in thin ribbons along watercourses that are not swampy and there are a
few isolated forest blocks (1-5 hectares), where the forest limits are not obviously related to
water. The flora of the galleries and bosquets has not been studied systematically, but some
tree species occur only in these habitats (e.g. Cathormion altissitnum, Aphanocalyx
cynometroides, Pachystela brevipes) and some, generally rare MF species become common
(e.g. Uapaca guineensis, Pseudospondias microcarpa and Ficru spp')'
List of Plant Species Identified in the Lope Reserve
271
Savannas protected from annual buming at Lopd are being actively colonised and this
gives trees with seeds that can germinate at the forest/savanna interface an enormous
potential for reproduction. Tree species diversity at the interface is low but successional
changes are clear with many young individuals of additional species appearing as soon as the
edge colonisers provide shade. Large trees able to regenerate at, or close to, the forest edge at
Lopd include Aucoumea klaineana, Lophira alata and Sacoglottis gabonensis. All these
species can form almost pure stands, shading out Graminae and creating conditions that
appear favourable to invasion by other tree species, notably Cola lizae, Dialium lopense,
Uvariastrum pierreanwn, Xylopia spp., Klainedoxn spp.
Of the tree species in Thble 1, three show an interesting variation in habitat-preference,
depending on whether they grow in CCF or in MF. The three species, Santiria trimera
(Burseraceae), Scyphoceplwliwn ochocoa and Staudtia gabonensis (Myristicaeae) are listed
as CCF species and the two former are amongst the commonest ten species in this habitat (see
Table 2). All three of these species also occur in MF but there show a distinct micro-habitat
preference, growing almost exclusively on the banks of permanent streams. It seems likely
that this reflects the post-Pleistocene colonisation of savannas, with the flora growing along
streams being old gallery forest now surrounded by the recently established Marantaceae
Forest.
Ape foods, Habitat-types and Inter-site Comparisons
At Lop6, gorillas and chimpanzees have diverse diets and obtain some foods from plants in
each of the habitat-types (Table 3). The sampling bias against CCF described above, applies
equally to our data on ape foods as far less time was spent observing and tracking apes in this
forest type than in MF. 'Forest' species are generalists that occur in both MF and in Closed
Canopy Forest and 55-6OVo of the 90 species in this category provide food for the apes. These
species, being widespread, though not always common, provide much food as gorillas and
chimpanzees both travel widely to exploit rare food resources. The mosaic of habitat-types in
the home ranges of our study groups at Lopd means that a wide range of food is available and
perhaps explains why gorillas at Lop6 are the most frugivorous population of the genus
studied to date (Williamson et al., 1990). Foods from the minor (in terms of area) habitats
make important contributions to ape diet and use of the savanna edge by both gorillas and
chimpanzees is highly seasonal and clearly related to fruiting patterns of F/s species
(unpublished data). Similarly, aquatic herbs particularly Marantochloa cordifulia
(Marantaceae) provide important keystone foods for gorillas at Lort during the dry season
when fruit is scarce (Rogers et al.1988; Tutin e, al.,l99lb).
Both gorillas and chimpanzees are known to show dietary flexibility and in different areas
do not always eat the same foods even when the plants are available. For example, Nishida et
al. (1983) found that only 597o of 286 available plant foods were eaten by chimpanzees at
two sites, Gombe and Matrale in Tanzania, although they are only 150 krn apart. Four of the
107 foods of lowland gorillas at Ndoki, Congo, listed by Nishihara (1992) occur ar Lop6 bur
are not eaten by gorillas. Of these, tfuee (Pennclethra seeds, Polyalthia fruit and Tetrapleura
seeds) are common within the SEGC study area Complete inter-site comparisons can only be
made once both lists of ape foods and plant species lists are published for each of the long-
tenn study sites. What determines which plants apes eat, and which they do not, is still
unknown but comparisons between sites will clarify ecological differences (e.g. total plant
272
C. E. G.
Turnr, L.
J. T. Wru're, E.
A. Wn r-nusoN, M. FEnNANDU & G. McHlEnsoN
species diversity at each site, the density of each species and the variety of habitat-types).
Information about the density of different plant species is important as the absence of a
rare species from the food list is less noteworthy than that of a common species. For example,
Musanga cercropioides (Moraceae) is eaten by apes elsewhere in Gabon (Hladik, 1973; Tutin
&
Fernandez, 1985) but has never been recorded as an ape food at Lop6. However, while
Musanga is a common colonising tree in most of Gabon, it is extremely rare in the SEGC
study area with only two rees known in 50 sq. lan. In conEast, Pentaclethra spp. arc common
with an average of 1,300 trees per knf in Marantaceae Forest at Lop6, yet gorillas do not eat
the seeds. An importance rating for foods (Tutin & Fernandez, 1993) is also useful when
making comparisons between sites, as consumption of rare foods can easily be overlooked
while differences in important, or keystone, foods indicate real ecological or cultural differences
between populations. Inter-site comparisons will allow a deeper examination of nutrition and
food choice than has yet been possible. Analysis of the importance of factors such as inlerspecific competition and the determinants of population density will also be possible and
should advance our understanding of the geographical distribution of African apes.
Conservation and Management Implications
The value of tropical forest ecosystems is now appreciated, as is the need to protect their
extraordinary diversity of plants and animals. To achieve this, the first step is to compile
inventories, but this arduous task is too often overlooked. Obstacles to this logical first step
are legion but major ones are the expense, expertise and time that are required. Even if
inventory data are collected they are rarely published in an accessible form.
Systematic inventories of plants allow recognition and definition of habitat-types and it is
crucial that protected areas include representative portions of all habitat-types. Tropical rain
forests are rich in overall plant species but are rarely homogeneous: communities vary in
species composition forming a patchwork, or mosaic, that may seem deceivingly uniform to
the naive observer. All of the minor habitat-types at Lop6 provide important foods for gorillas
and chimpanzees and some, such as marshes, are crucial for gorillas during the dry season.
The savanna shrub Psidlzm guineensis produces fruit twice a year and gorillas, chimpanzees
and elephants arc attracted to the savannas to eat the fruit. Not only is it of interest to study
the behaviour of forest species in a very different habitat" but also visitors to the Reserve can
watch large mammals in ideal conditions. The Inpd savannas would be re-colonised by forest
if the gass was not burned annually. Thus, maintenance of part of the habitat (and species)
diversity at L,opE depends on active management to arrest a natural successional change.
Recommendations
The value of systematic sampling of vegetation is obvious as
it permits both qualitative
(presence versus absence) and quantitative (relative abundance) comparisons between sites.
Transects placed across the drainage give a representative sample of major habitat-types but
may include only small samples of some habitats (e.g. riverbanks or foresVsavanna interface).
These minor habilats may be of great interest and, if not sufficiently represented in transects'
should be sampled intensively using plots placed within each habitat-type. The enumeration
and identification of trees along transects and in sub-plots is time-consuming and difEcult but
is probably ttre best way to leam to recognise different plant species. Individual frees should
be labelled to allow long-term monitoring, checking of identification, and to act as a living
List of Plant Species Identified in the Lope Reserve
273
herbarium for new researchers. Non-specialists rarely have the taxonomic expertise to key out
specimens with confidence, even if a local Flora is available; thus it is essential to collect
good specimens that can be sent to specialists. We advise multiple collection and careful
labelling of botanical specimens and the need for fertile material (preferably flowers). The
Missouri Botanical Garden has produced a guide to plant collecting and specimen preparation
that is useful. It is important to establish a good working relationship (good specimens in
exchange for rapid identifications) with National and International Herbaria as otherwise,
delays can be long and frustrating. It would be valuable if a list of taxomonic experts and
institutions interested in such collaboration with long-term field sites existed.
Finally, researchers interested in inter-site comparisons should continue their efforts to
standardise methodology and to publish baseline data on ape foods and plant species lists
from their sites.
ACKNOWLEDGEMENTS
We thank the L.S.B. Leakey Foundation, the World Wide
Fund for Nature, the Leverhulme Trust, NYZS-The Wildlife Conservation Society, the World
Society for the Protection of Animals, The Royal Society, the Conder Conservation Trust, the
Richard Brown Scholarship, the Conrad Zweig Trust, the Herbier de la Centre National de
Recherche Scientifique et Technique (Libreville) and especially the Centre International de
Recherches Medicales de Franceville for financial and logistical support; also Alphonse
Mackanga-Missandzou, Joseph Maroga-Mbina and the Direction de la Faune for assistance in
the Lope Reserve. This material is based, in part, upon work supported by: the ECOFAC
programme funded by the EEC (DGVIII) and managed by AGRECO-GEIE (LJTW & MF);
and the National Science Foundation and the Office of Forestry, Environment and Natural
Resources, Bureau of Science and Technology, of the U.S. Agency for International
Development under NSF Grant No. BSR-9024745 (GMcP). We are grateful to the following
colleagues who contributed to data collection at the Lope: Stephanie Hall, Rebecca Ham,
Karen McDonald, Richard Parnell, Liz Rogers and Ben Voysey. We thank Patrick Blanc, EJ.
Breteler, David Harris, Mike Harrison, Philippe Hecketsweiler, Nicolas Halle, Annette
Hladik, Carel Jongkind, Ard Louis, Nick Mundy, Frank White, and Chris Wilks for help with
botanical identifications.
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2
7
6
C
.E
.G
.TUTIN. L
.J
.T
.WHITE , E
.A
.WILLIAMSON , M.FERNANDEZ , G
.MCPHERSON
ガボン・口ぺ保護地域の同定された植物リスト
ガボン中央部に位置するロベ保護区 (the
L
o
p Reserve) の 'Station d
'
E
t
u
d
e
sd
e
sG
o
r
i
l
l
e
se
t
Chimpanz白 (SEGC)'におけるローランドゴリラ (Gorilla
g
.gorilla)
とチンパンジー (Pan
.
t
troglodytes) に関する研究は、 1983 年に始まり現在も継続中である。本論文では、 50km 2 の調査
地で確認できた 91 科 676 種の植物名をリストにして報告する。直径 10cm かそれ以上の木本の
データはライントランセクト法によりシステマティックに採集し、繁殖中の植物に関しては見つ
かれば吉己録するという方法をとった。各植物種について、生活形、ハピタツトの好み、そしてト
ランセクト上で記録した木本については密度を記載した。また、ゴリラやチンパンジーに食物を
提供する植物については、その探食部位を記載に入れた。植物種名リストは完全ではないが、
SEGC 調査地の植物の多様性は示している。記載した 7 つのハピタット・タイプはサバンナから
樹冠の閉じた森 (Closed CanopyForest) までの幅があるが、調査地の主要な植生はクズウコン
科植物が林床に多い森林蜘1arantaceae Forest) である。ロベのゴリラとチンパンジーは幅の広い
食性を持ち、すべてのハピタット・タイプで植物から食物を得る。特定の季節には、いくつかの,
面積では狭い分布域しか有していない植物が多量の食物を供給する。アフリカの異なる調査地の
植生リストが明らかになって初めて、類人猿の採食対象の比較が可能になる。