Oryx Vol 41 No 1 January 2007
Saving the Island in the Sky: the plight of the Mount Mulanje cedar
Widdringtonia whytei in Malawi
Julian Bayliss, Steve Makungwa, Joy Hecht, David Nangoma and Carl Bruessow
Abstract The Endangered Mulanje cedar Widdringtonia
whytei, endemic to the Mount Mulanje massif in Malawi,
has undergone a drastic decline due to increased fire
incidence and illegal logging. Valued for its fine timber,
attractive fragrance, and pesticide-resistant sap, the tree
has been regarded as highly desirable since its discovery
in the late 19th century. Because of its steep slopes and
isolated high altitude plateau, Mount Mulanje is also a
refuge for a number of other endemic plant species. The
first assessment of the Mulanje cedar since 1994 was
commissioned by the Mulanje Mountain Conservation
Trust to ascertain the species’ current extent and status.
This study identified an area of 845.3 ha of Mulanje cedar,
which represents a loss of 616.7 ha over the previous
15 years. Of the recorded trees 32.27% (37,242 m3) were
dead cedars. Therefore, under current Department of
Forestry harvest licensing, there remains in theory
sufficient dead cedar to last .30 years. At this stage it
is imperative that cedar nurseries are established and
saplings planted out across the mountain on an annual
basis, small cedar clusters are protected to facilitate
regeneration, and a strict monitoring programme is
followed to prevent the cutting of live cedar.
Introduction
late President Dr Hastings Banda, and has come to
symbolize the delicate balance that faces the Mount
Mulanje ecosystem. W. whytei is categorized as
Endangered on the IUCN Red List (IUCN, 2006). In
2000 the Mulanje Mountain Forest Reserve was designated for inclusion in the World Network of Biosphere
Reserves as part of the UNESCO Man and the Biosphere
Programme. An application has since been submitted to
UNESCO for World Heritage Site status. Such approval
will be crucial to the preservation of the mountain’s
ecosystem, obliging the UN to undertake legal action if
the Mulanje ecosystem is threatened.
The genus Widdringtonia contains several species from
southern Africa, notably W. cedarbergensis (Cederberg
mountains, South Africa), W. schwarzii (Baviaans Kloof
Mountains, South Africa), and W. cupressoides (syn. W.
nodiflora, found throughout southern Africa; Marsh,
1966). W. whytei was originally thought to be synonymous with W. nodiflora, which in turn was thought to
be synonymous with W. cupressoides (Marsh, 1966),
although this is disputed (Pauw & Linder, 1997). On
Mount Mulanje both the W. nodiflora (multi-stemmed,
narrow crowned tree) and W. whytei (taller, wide
crowned) forms exist.
There are several threats to the Mount Mulanje
ecosystem. The most serious of these are fire, fuelwood
collection, illegal logging, unsustainable hunting, invasive species, and the potential threat of bauxite extraction (Bayliss, 2005; Hecht, 2006). Some fires are natural
but it is believed that the majority are human made
(Chapman, 1995). Hunting fires (to flush out game) are
The Mulanje cedar was first noted by the Scottish
missionary Robert Cleland when he climbed onto the
Mulanje plateau in 1888 and ‘discovered himself in
another world … with here and there clumps of a tree
unknown beyond the mountain’ (Jenkins, 1986). This
unknown tree was later to become the Mulanje cedar
Widdringtonia whytei. The Mulanje cedar was first
described by Whyte (1893) and later named by Rendle
(1894). Commercial exploitation began in 1898 and
continued until 1955, with large areas of forest cleared.
The area was gazetted as Mulanje Mountain Forest
Reserve in 1927 by the British authorities (when Malawi
was known as the Protectorate of Nyasaland), probably
more to manage and exploit the plateau’s resources than
to conserve them (Chapman, 1994). The Mulanje cedar
was declared the national tree of Malawi in 1984 by the
Julian Bayliss* (Corresponding author) Wildlife Conservation Society, 2300
Southern Boulevard, Bronx, NY 10460-1090, USA. E-mail jbayliss@wcs.org
Steve Makungwa Department of Forestry and Horticulture, Bunda College,
University of Malawi, Lilongwe, Malawi.
Joy Hecht Consultant on Environmental Economics and Policy to the Mulanje
Mountain Conservation Trust.
David Nangoma and Carl Bruessow Mulanje Mountain Conservation Trust,
PO Box 139, Mulanje, Malawi.
*Also at: Mulanje Mountain Conservation Trust, P.O. Box 139, Mulanje, Malawi.
Received 21 November 2005. Revision requested 17 January 2006.
Accepted 24 April 2006.
64
Keywords Fire, Malawi, Mount Mulanje, Mulanje
cedar, Widdringtonia whytei.
ß 2007 FFI, Oryx, 41(1), 64–69
doi:10.1017/S0030605307001548
Printed in the United Kingdom
The Island in the Sky
widespread, although technically no hunting is allowed
inside the Forest Reserve boundaries. Crop-burning fires
are also a common occurrence and often spread out of
control onto the mountain from outside the Reserve
boundaries. Illegal logging of Mulanje cedar is also
significant in areas not normally visited by Department
of Forestry or Mulanje Mountain Conservation Trust
officials (J. Bayliss, pers. obs.).
The spread of invasive species on the plateau is well
documented. The most serious is the Mexican pine Pinus
patula, originally planted as a nursery crop for the Mulanje
cedar and eventually as a plantation crop instead of the
Mulanje cedar (Chapman, 1995). It has completely taken
over certain areas of the mountain to the detriment of all
other native species. Another threat is the aphid Cinara
cupressi, originally found on the Mexican cypress Cupressus
lusitanica planted c. 80 years ago on Mount Mulanje for
timber (Chapman et al., 1991). The aphid attacked the
Mulanje cedar and was the cause of death of many trees
(Chilima, 1989; Sakai, 1989b). A parasitic wasp Pausia
bicolor was released as a biological control for C. cupressi in
1991 (Chilima & Meke, 1993) but the effectiveness of the
programme is unknown and awaits investigation.
About 30 million tons of bauxite exist on Mount
Mulanje, mainly on the Lichenya and Chambe plateaus
that cover approximately one third of the mountain
(Hecht, 2006). If mining does take place it will
completely destroy the Mulanje cedar forests in these
regions. In December 2005 the Malawi government
announced the discussion of open-cast mining with the
South African mining company Gondo Resources
Management. Currently they are at the prospecting
stage although it is thought that mining will start in 2011
following an acceptable Environmental Impact
Assessment on behalf of the mining company. It is
estimated that the mining will last for at least 25 years
(R. Illingworth, pers. comm.).
This study presents the results of the most recent
status and distribution survey of the Mulanje cedar. The
last survey was in 1994 (Lawrence et al., 1994), during
which time Malawi underwent a period of political
change following the 30-year rule of President Banda.
This time of change had repercussions for the natural
environment and there was a decline in the management and protection of the Mulanje cedar. This study
assesses the current status of the Mulanje cedar,
compares this with the results from previous studies,
describes current threats to the tree, and makes
conservation recommendations.
in southern Malawi and is the highest mountain in
tropical southern Africa, rising to .3,000 m and covering
an area of c. 650 km2 (Fig. 1). Known as a centre of
biodiversity, the mountain contains high levels of
endemism, with 70 out of 1,330 vascular plant species
endemic (Strugnell, 2002). The south-east of the plateau is
wetter than the north-west because of the prevailing
Mozambique coastal trade winds, creating a range of
biomes within the mountain ecosystem. The areas
surrounding the mountain are a mosaic of habitat and
land use types, with tea estates predominant on the
southern and eastern boundaries of the Forest Reserve.
The mountain is important for its water catchment value,
and gives rise to nine major rivers. On average 2,859 mm
of rain is recorded in the south-east of the plateau at
Lichenya and 2,001 mm on Esperanza Tea Estate at the
base of the mountain (R. Illingworth, pers. comm.).
Study area
Sampling
Known locally as chilumba mu mlengalenga (Island in the
Sky) Mount Mulanje rises spectacularly above the plains
The number of plots in each stratum varied depending on
the size of the cedar cluster. In each circular plot 20
ß 2007 FFI, Oryx, 41(1), 64–69
Methods
Areas of potential cedar clusters were identified using
the Mulanje Mountain 1:40,000 topographic map
(Department of Surveys, Malawi, 1996), combined with
our knowledge of the plateau. Possible cluster boundaries
were delineated in consultation with Mulanje Mountain
Conservation Trust and Department of Forestry staff. We
found this delineation agreed with the results of an
independent study (Bouvier, 2006) in which cedar
clusters were identified using remote sensing. Predictive models were then used to calculate standing and
merchantable volumes of both living and dead cedar.
Mapping
Each cluster was stratified based on terrain and in each
stratum systematic sampling was used to locate plots.
An interior baseline was established 100 m from the
edge of a cluster, to account for edge effects. From this
point a 500 metre grid was established towards the
cluster centre. Circular plots, with a variable radius of
25–60 m to ensure a minimum of 20 trees per plot, were
located every 500 m along each grid line. This gave a
total of 33 plots and a sampling intensity of 3.9% of the
total identified cedar coverage of 845.3 ha. The geographic coordinates of each plot centre and of cluster
boundaries were recorded with a global positioning
system (GPS) to an error of ¡ 5–10 m. Boundary
coordinates were used in the geographical information
system ArcView GIS v. 9 (ESRI, Redlands, USA) to
represent cedar clusters as polygons.
65
66
J. Bayliss et al.
Fig. 1 Mulanje cedar clusters and sites of fires during 2000–2005 on Mount Mulanje. The inset indicates the location of Mount Mulanje in
southern Malawi.
Mulanje cedar trees of >5 cm diameter at breast height
(DBH) were identified. The height of the 5th, 10th, and
20th trees from the centre of each circular sampling plot
was measured using a hypsometer. Cedars ,5 cm DBH
were recorded as saplings. Dead standing trees within the
plot were also measured, to determine standing volume.
Analysis
The tree assessment models used were developed by
Makungwa & Saramaki (2000) for conifers growing in
Malawi.
Standing volume
The calculation of stem volume used the model V 5
10**(24.318 + 1.887 * log10DBH + 1.021 * log10ht), where
V 5 standing volume per tree (m3) from stump height
(15 cm) to an upper limit of 5 cm trunk diameter
(including bark), log10DBH in cm includes bark, and
log10ht 5 log10 of height in m to an upper limit of 5 cm
trunk diameter. Applying this model to stocking levels,
we calculated the total standing volume (m3) for each
cedar cluster.
Merchantable volume
Merchantable volumes are commercially viable sizes for
timber, measured to certain upper trunk diameters,
starting at 13 cm. The calculation of the proportions of
merchantable volumes available to upper trunk diameters
of 13, 20, and 25 cm used the model Vm/V5 cm 5 b0 * {[12
exp (b1 * DBH)] ** b2}, where Vm 5 overall merchantable
volume to top diameter limit (m3), V5 cm 5 volume to 5cm
top diameter (m3), and DBH includes bark.
Results
We identified a total of 30 cedar clusters in six main
regions (Fig. 1). There were marked differences in the
percentages of dead and living cedar between regions,
and mean density ranged from 41 stems ha21 at Chambe
to 131 stems ha21 at Chinzama (Table 1).
Most of the cedars were in the .55 cm DBH size class
(Table 1), signifying the maturity of the remaining
stands. Mean percentages of living and dead trees across
the six regions were 67.7 and 32.3% respectively.
Applying the standing volume model to the stocking
level statistics (Table 1) gave the total standing volume
ß 2007 FFI, Oryx, 41(1), 64–69
The Island in the Sky
Table 1 Mean density (stems ha21) of live and dead cedar (in parentheses) by size class (DBH) and overall, % live and dead trees, and the
total area of identified cedar clusters for the six regions of Mount Mulanje (Fig. 1) as of July 2004.
Density by size class (DBH in cm)
Region
5–14.9
15–24.9
25–34.9
35–44.9
45–54.9
> 55
Overall density
Chambe
Chinzama
Lichenya
Madzeka
Sombani
Thuchila
Total
Mean ¡ SD
13
19
1
0
15
7
15
7
7
0
14
3
1
10
10
0
28
7
0
16
16
2
13
6
3
15
7
2
13
10
4
10
15
45
16
24
36
77
56
49
99
57
(3)
(0)
(1)
(0)
(0)
(1)
(2)
(0)
(7)
(0)
(3)
(8)
(0)
(11)
(11)
(10)
(3)
(12)
(0)
(3)
(9)
(8)
(16)
(6)
(0)
(33)
(2)
(17)
(0)
(3)
(5)
(54)
(35)
(39)
(27)
(34)
87.8
58.8
61.5
55.7
78.6
62.6
(12.2)
(41.2)
(38.5)
(44.3)
(21.4)
(37.4)
Area (ha)
133.5
60.1
256.1
163.4
53.6
178.6
845.3
67.7 ¡ 12.4
(32.3 ¡ 12.4)
Table 2 Total standing volume (m3) of cedar, and of living and
dead cedar separately, for the six regions of Mount Mulanje (Fig. 1)
as of July 2004.
Region
Total (m3)
Live (m3)
Dead (m3)
Chambe
Chinzama
Lichenya
Madzeka
Sombani
Thuchila
Total
7,232
5,653
43,753
20,482
9,348
28,933
115,401
5,407
3,819
27,702
14,434
6,764
20,033
78,159
1,825
1,834
16,051
6,048
2,584
8,900
37,242
b0
b1
b2
R2
0.942
0.855
0.827
20.288
20.248
20.222
53.358
202.375
399.521
0.920
0.930
0.950
The regression coefficients for the proportions of
merchantable volumes of trees with upper trunk
diameters of 13, 20, and 25 cm are given in Table 3.
Using these coefficients in the merchantable volume
model gave merchantable volumes of dead standing
cedar of 31,239 m3 (13 cm), 26,922 m3 (20cm) and
22,082 m3 (25cm).
Discussion
Table 3 Values for regression coefficients used in the merchantable volumes model.
V13cm
V20cm
V25cm
(0)
(7)
(5)
(4)
(5)
(4)
% live (dead)
and volumes of living and dead cedar for each of the six
regions (Table 2). There was a total standing volume of
Mulanje cedar of 115,401 m3. This result represents a
relatively large amount of available dead standing
timber.
Several previous assessments of cedar have been undertaken on Mount Mulanje (Edwards, 1982; Sakai, 1989a,b;
Lawrence et al., 1994; Table 4). Although these studies
differed in the methodologies employed, making direct
comparison difficult, they did assess the available cedar
stands on the main Mulanje massif. All the studies noted
a low natural regeneration of cedars and relatively high
mortality rates (currently 32.6% of standing cedar is
dead). Sakai (1989a) calculated an area of Mulanje cedar
equivalent to 1,462 ha, whereas we calculated an area of
845.3 ha, representing a decrease of 616.7 ha in 15 years
(a 2.8% loss per year). Based on our volume estimates,
this represents an annual loss of 5,611 m3, or approximately 15 cedar trees per day. At this rate, assuming a
1% natural growth rate (Hecht, 2006), all the accessible
cedar will disappear within the next 8 years. A recent
Table 4 Number of survey plots used, total area of Mulanje cedar (if available), and percentage living and dead trees from this study in 2004
and the three earlier studies. The 1982 study presented data for the Thuchila and Lichenya regions only, and separately, and therefore this
data is also provided for 2004.
Year
No. of plots
1982
18
1989
1994
48
21
2004
33
ß 2007 FFI, Oryx, 41(1), 64–69
Total area (ha)
% living
% dead
Reference
76.9 (Thuchila)
84.4 (Lichenya)
23.2 (Thuchila)
15.6 (Lichenya)
Edwards (1982)
61
39
67.7
62.6 (Thuchila)
61.5 (Lichenya)
32.3
37.4 (Thuchila)
38.5 (Lichenya)
1,462
845.3
Sakai (1989b)
Lawrence et al.
(1994)
This study
67
68
J. Bayliss et al.
remote sensing analysis of land use change on the
mountain found that Afromontane and mid altitude
forest declined from 9,292 to 7,928 ha between 1973 and
2002, an annual decline of 0.5% per year (Bouvier, 2006).
The Mulanje cedar therefore appears to be declining at a
greater rate than the forest overall. Comparisons for the
Thuchila and Lichenya regions separately between 1982
(Edwards, 1982) and 2004 suggests that there has been a
decrease in survival rates (Table 4).
The Malawi Department of Forestry currently licenses
only the utilization of dead Mulanje cedar trees. The
number of licenses issued per season, while reviewed
annually, averages 20 pit sawyers. The mean yield
(volume) of an individual pit sawyer in one cedar
cutting season on Mount Mulanje has been estimated to
be 20 m3 (J. Juwawo, pers. comm.), thereby harvesting
an annual average of 400 m3. Based on this we consider
that the volume of accessible dead cedar trees currently
standing on the mountain (37,242 m3 at a top diameter of
5cm; Table 2) could, at least in theory, last for 30 years if
utilized at the current rate with proper supervision and
monitoring.
However, these figures do not take into account illegal
logging activities. In 2005 Mulanje Mountain
Conservation Trust and the Department of Forestry
confiscated .500 cedar planks, or 28.5 m3 (assuming 1
plank equals 0.057 m3 based on an average size of 5.4 6
0.21 6 0.05 m) in a single raid. This equates to .33 trees
(assuming 15 planks per tree), with the majority of
planks cut from live trees (the sap was still fresh).
However, the resources of these two organizations to
combat illegal logging are limited and it is likely that
many more illegal activities, including hunting and
encroachment, are going undetected.
The greatest threat to the Mulanje cedar is, however,
probably uncontrolled fire. As part of a monitoring
programme developed on behalf of Mulanje Mountain
Conservation Trust by the Wildlife Conservation Society
(Bayliss, 2005), fire is monitored through the use of a
rapid alert system, the Web Fire Mapper (Justice et al.,
2002). This relies on fires being detected through satellite
supervision, with alerts sent detailing the exact location of each fire (Fig. 1). Thus the incidence and
distribution of fires can be monitored and investigated
for causality.
Mulanje cedar has a high commercial value. The
wood is rot-proof and the sap is toxic, and therefore
termites do not attack it, a great advantage in tropical
Africa. Whilst these qualities have fuelled the exploitation of the tree they could also help save it through a
programme of sustainable resource utilization if strict
guidelines and monitoring could be put in place. Based
on the results of this survey we make the following
conservation recommendations:
N
N
N
N
N
N
N
Although there is a system in place to detect the
occurrence of fire, there are no means to fight any
fires. The Department of Forestry, supported by
Mulanje Mountain Conservation Trust, need to
create a team specifically for fire fighting.
A reforestation programme is required for all areas
that were historically cedar forests. This could be
achieved through establishment of more cedar
nurseries to support the current three small
nurseries. There is the potential for at least nine,
situated at each of the mountain huts.
Research is required into the germination and propagation of the Mulanje cedar. It is known to be easy to
germinate (Chapman, 1995) but difficult to establish
thereafter.
The Mulanje cedar is still being attacked by the aphid
Cinara cupressi, a phenomenon that was initially
studied in 1985 (Chilima, 1989). Further investigation of the scale of this problem could be undertaken
by the Forestry Research Institute of Malawi.
Currently much live cedar is harvested under the
Department of Forestry logging licenses (J. Bayliss,
pers. obs.). The utilization of only dead Mulanje
cedar needs to be strictly enforced under a workable
monitoring system. This is the responsibility of the
Department of Forestry and Mulanje Mountain
Conservation Trust.
All exotic organisms need to be eradicated from the
Mulanje massif. Notably this includes the Mexican
pine Pinus patula, the aphid Cinara cupressi, the
Himalayan raspberry Rubus ellipticus, and bracken
Pteridium aquilinum.
Planned open cast mining for bauxite would destroy
approximately one third of the plateau and its flora
and fauna. It is essential that the Environmental
Impact Assessment undertaken by the mining
company is critically examined by a panel of
international experts.
Mount Mulanje is currently threatened by fire, bauxite
extraction, illegal and unsustainable logging of the
Mulanje cedar forests, and the unsustainable fuelwood
collection that threatens the lowland woodlands. It is
also an area with high levels of biodiversity and
endemism, of immense natural beauty, and with landmark status as the second highest mountain in southern
Africa. The plateau should be given World Heritage Site
status and afforded an appropriate level of protection to
ensure its resources are secured for future generations.
Acknowledgements
Thanks are especially due to Jim Chapman for his
tireless efforts to conserve Mount Mulanje over the last
ß 2007 FFI, Oryx, 41(1), 64–69
The Island in the Sky
50 years, and for his comments on this paper. Thanks are
also due to Alison Strugnell for her work in the
production of the vascular plant checklist, to Tim
Davenport and Graeme Patterson of the Wildlife
Conservation Society, to all at the Kew Millennium
Seed Bank Project, notably Paul Smith, and to past
forestry officers, especially Geoffrey Ayres, and
researcher Isao Sakai. Thanks are also due to the senior
forest assistant, Mr J.T. Juwawo, to his continuing work
on the mountain in light of difficult circumstances.
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Biographical sketches
Julian Bayliss is a conservation biologist and landscape
ecologist. He is currently working with the Mulanje
Mountain Conservation Trust (http://www.mountmulanje.
org.mw) and the Royal Botanical Gardens Kew, London, UK,
coordinating a Darwin Initiative project in Mozambique.
Steve Makungwa is a lecturer in Forestry Inventory and
Mensuration at the University of Malawi. He specializes in
forestry assessment techniques in Malawi.
Joy Hecht is a freelance consultant on environmental
economics and policy, working in many regions of the
developing world.
David Nangoma is the Biodiversity Officer for the Mulanje
Mountain Conservation Trust and currently coordinates the
Ecological Monitoring Programme for Mount Mulanje.
Carl Bruessow is the Executive Director of the Mulanje
Mountain Conservation Trust. His interests lie in project
development and he has many years of experience in
protected area management in Malawi.
69