Gardens’ Bulletin Singapore 66(1): 3–14. 2014
3
The conservation of Peninsular Malaysian Geostachys
(Zingiberaceae)
K.H. Lau
Forest Research Institute Malaysia,
52109 Kepong, Selangor, Malaysia
laukh@frim.gov.my
ABSTRACT. There are currently 15 species of Geostachys in Peninsular Malaysia of which
13 are hyper endemic to their localities. Four taxa are categorised as Endangered, eight as
Vulnerable and one each as Near Threatened, Least Concern and Data Deicient. Maps showing
the Extent of Occurrence and Area of Occupancy for each species are included. Key issues
and recommendations on conservation measures, particularly with respect to ecotourism, are
discussed.
Keywords. Area of occupancy, assessment, conservation, extent of occurrence, Geostachys,
Peninsular Malaysia
Introduction
Geostachys (Baker) Ridl. is a genus of lesser-known gingers distributed in Vietnam,
Thailand, Sumatra, Peninsular Malaysia and Borneo. Of the 25 taxa currently known
(The Plant List, 2013), 15 occur in higher altitude lush rain forests of Peninsular
Malaysia (Lau et al., 2007; Lau & Lim, 2012). This makes Peninsular Malaysia the
genus hotspot. Among the 15 taxa, 13 are hyper-endemic to their localities and the
other two are quite widespread.
In Malaysia, the main threats to lowland forest are from deforestation and
changes in land use. Despite their preference for higher altitudes, Geostachys habitats
suffer from similar disturbances. While there are several works describing the genus
in Peninsular Malaysia (Ridley, 1899, 1920, 1924; Holttum, 1950; Stone, 1980), none
address the conservation perspective. This paper discusses threats faced by the species
and their conservation status. It also complements an earlier account (Lau & Lim,
2012) by presenting further insights into the current conservation issues involving the
genus.
Materials and methods
Dried specimens from Universiti Kebangsaan Malaysia Herbarium (UKMB), Kepong
Herbarium (KEP), University Malaya Herbarium (KLU), Singapore Herbarium (SING)
and Royal Botanic Gardens Kew Herbarium (K) were scrutinized and recorded into
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Gard. Bull. Singapore 66(1) 2014
the Botanical Research and Herbarium Management System (BRAHMS). All species
were assessed using the modiied Malaysian Red List Categories (Chua, 2012). The
modiication from the standard IUCN (2001) system involves the addition of a Rare
(RA) category. This category has this deinition: the taxon is not exposed to any known
direct or plausible potential threat and does not qualify under the ive IUCN criteria
AND occurs in not more than two sites OR has an Extent of Occurrence (EOO) not
more than 100 km2 OR Area of Occupancy (AOO) not more than 10 km2. A taxon data
information sheet was completed for each species and the information was uploaded
into the Malaysia Clearing House Mechanism website (http://www.chm.frim.gov.
my/). The EOO and AOO were calculated for each species using ArcView GIS 3.2a
software. Forest cover data was obtained from the Third National and State Forest
Inventories (1991–1993). Field efforts were made to gather fresh data and analyse
current threats.
Results
Table 1 summarises the conservation status of each species of Geostachys in Peninsular
Malaysia.
Table 1. Conservation status of Geostachys following the modiied Malaysian Red List
Categories.
Species
G. belumensis
G. decurvata
G. densilora
G. elegans
G. erectifrons
G. leucantha
G. megaphylla
G. montana
G. penangensis
G. primulina
G. rupestris
G. secunda
G. sericea
G. tahanensis
G. taipingensis
Category
EOO (km2)*
AOO (km2)
Endemicity
VU D2
EN D2
NT
LC
VU D2
VU D2
VU D2
DD
EN B2ab(iii)
EN D2
VU D2
VU D2
VU D2
VU D2
EN D2
n.a.
n.a.
3,172
23,108
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
4
8
32
24
4
4
8
Hyper-endemic
Hyper-endemic
Widespread
Widespread
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
Hyper-endemic
4
8
4
4
4
4
4
8
*EOO can only be calculated if at least 3 localities are present.
The species calculated to be Endangered (EN) are Geostachys decurvata
(Baker) Ridl., G. penangensis Ridl., G. primulina Ridl. and G. taipingensis Holttum,
Conservation of Peninsular Malaysian Geostachys
Fig. 1. Distribution of Endangered (EN) Geostachys species in Peninsular Malaysia.
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Gard. Bull. Singapore 66(1) 2014
all of which are hyper-endemic (Fig. 1). Found growing discreetly within the cool
atmosphere of hill forests in Perak, Penang and Pahang, these taxa are endangered
mainly due to low numbers of individuals per species. With the exception of Geostachys
penangensis, several attempts to locate additional populations of these species in
these forest reserves proved futile. Geostachys decurvata and G. taipingensis occur
sympatrically on Gunung (G.) Hijau, Maxwell’s Hill. These two taxa have both
been very infrequently collected and G. taipingensis has not been collected for the
herbarium since 1949. Lau (2006) reported the rediscovery of Geostachys primulina
from Fraser’s Hill for the irst time in more than 80 years. Geostachys penangensis
can still be found quite abundantly on Penang Hill (Lau, 2004) with populations at
several locations on the hill such as Government Hill, Tiger Hill, Western Hill and
Moniot Road West. However, road widening activities along the main road (Jalan
Tuanku Yahaya Petra) have caused much destruction to the clumps. The increase in
human activities on the hill is of concern and long-term monitoring of the impacts on
the populations is required. In addition, the sites of these four taxa are also used as
eco-forest trails and are exposed to the risk of being trampled.
The Vulnerable (VU) taxa are Geostachys belumensis C.K.Lim & K.H.Lau, G.
erectifrons K.H.Lau, C.K.Lim & K.Mat-Salleh, G. leucantha B.C.Stone, G. megaphylla
Holttum, G. rupestris Ridl., G. secunda (Baker) Ridl., G. sericea (Ridl.) Holttum and
G. tahanensis Holttum (Fig. 2). In Taman Negara National Park, three taxa are found,
namely Geostachys erectifrons, G. sericea and G. tahanensis. Their distributions are,
however, very localised. So far, Geostachys erectifrons is only known from the area
between Permatang and Kubang campsites (Merapoh) at an elevation of 1000–1200 m
(Lau et al., 2005). Scattered clumps can be seen on ridges and slopes along both sides
of the main trail. The distribution of Geostachys tahanensis is also very restricted,
occurring on a different side of the mountain near Kuala Tahan Rest Camp, formerly
known as Wray’s Camp, at about 1100 m above sea level. Geostachys sericea has a
wider distribution on both the Kuala Tahan and Merapoh sides, but is loosely scattered
from the lower montane forest to upper montane forest. Until more populations are
discovered beyond these well-used trails and spots, they remain vulnerable as they
are at risk of being trampled or collected. For Geostachys belumensis, some of
the populations in Gerik are now likely protected since 18,866 ha of the Amanjaya
Forest Reserve (FR) was gazetted in May 2013. The area has also been identiied
as an important wildlife corridor under the Central Forest Spine (CFS) Masterplan.
This provides protection to many other lora and fauna species along the East-West
Highway. Recent discoveries include populations in Piah FR (Perak) and G. Tebu
(Terengganu) (C.K. Lim pers. obs.). However, the type location of this taxon, which
is in Gerik, is showing signs of degradation due to encroachment. In particular the
surrounding area has been cleared, probably for the harvesting of non-timber forest
products. Geostachys leucantha and G. megaphylla are found in G. Ulu Kali (Genting
Highlands) and G. Brinchang (Cameron Highlands) respectively. Although there are no
immediate direct threats to these populations, the environmental impacts arising from
non-forest land use will likely affect the viability of the populations. Infrastructure
projects, such as for resorts, power lines and slope enhancement structures, as well as
Conservation of Peninsular Malaysian Geostachys
Fig. 2. Distribution of Vulnerable (VU) Geostachys species in Peninsular Malaysia.
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Gard. Bull. Singapore 66(1) 2014
forest clearance for agriculture, especially around Brinchang town and above, have
imposed great pressures on the health of the species’ populations. For Geostachys
rupestris, which is found on G. Jerai (Kedah), dumpsites at forest fringes are slowly
degrading the quality of the habitat where clumps once grew. Part of the forested area
on G. Jerai serves as a tourist attraction. In the pristine forest of G. Batu Puteh (Perak)
Geostachys secunda is found along trails used by the local communities and are,
therefore, at risk of being trampled.
The two more widely distributed species are Geostachys densilora Ridl. and G.
elegans Ridl. Geostachys densilora is mainly found in the mountainous area along the
Titiwangsa Ridge in the Cameron Highlands and on Fraser’s Hill (Fig. 3). Until recently
this species was only known from Pahang and Perak but a 2010 expedition to G.
Chamar and G. Chamar Anak, Kelantan revealed new sites for Geostachys densilora.
These new populations occur at an elevation of 1300 m and 1700 m respectively. This
has expanded its AOO to close to 32 km2. At the type locality in G. Korbu it was last
collected in 1913 and it is not known if it still occurs there; further investigation is
needed to verify its status.
Most populations of Geostachys elegans are restricted to the state of Pahang
although the type locality is G. Ledang in northern Johor (Fig. 4). The populations in
both Taman Negara National Park and G. Ledang State Park are relatively safe within
their Protected Areas (PAs).
Geostachys montana (Ridl.) Holttum is Data Deicient (DD) as it could not
be relocated on G. Berembun in the Cameron Highlands (Fig. 5) even after several
attempts. There are two possibilities, i.e., either the original locality details were
inaccurate or it has gone extinct in the wild. Further research is required to determine
its status in the near future.
Discussion
Protected areas remain the best places for material for taxonomic research and the most
likely place for the discovery of new species. In Malaysia, the pristine conditions of its
National and State Parks and other protected forest areas provide the last refuges for rich
biodiversity that tropical forests are famed for. For instance, examples of new species
discovered from protected areas in Malaysia include two new Geostachys species (Lau
et al., 2005) in Taman Negara National Park, another Geostachys species in Maliau
Basin, Sabah (Lim & Lau, 2006), a Pennilabium orchid in Endau Rompin National
Park, Johor (O’Byrne et al., 2009), two gingers from the genus Scaphochlamys in Krau
Wildlife Reserve, Pahang (Sam et al., 2010) and 13 new species of Begonia from G.
Mulu National Park and G. Buda National Park, Sarawak (Sang et al., 2013). These,
and many others, indicate that more inventory attention should be given to areas that
are ‘botanical black holes’. It is anticipated that more new species will be found in the
future as the diversity in the protected areas continues to be studied.
With 60% of the world’s Geostachys species occurring in Peninsular Malaysia,
with more than 85% of these taxa hyper-endemic, this region is regarded as the genus
Conservation of Peninsular Malaysian Geostachys
Fig. 3. Distribution of Geostachys densilora Ridl. in Peninsular Malaysia.
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Fig. 4. Distribution of Geostachys elegans Ridl. in Peninsular Malaysia.
Conservation of Peninsular Malaysian Geostachys
Fig. 5. Distribution of Data Deicient (DD) Geostachys species in Peninsular Malaysia.
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hotspot. Therefore, conservation of these gingers should be given priority. While some
taxa occur in Protected Areas, there are many which do not. These taxa are exposed
to threats such as habitat encroachment and land use changes, i.e. in the Cameron
Highlands and Genting Highlands. The expansion of forest trail packages by tourist
operators in the Cameron Highlands could further disturb the ecosystem due to higher
footfall. Currently, there are no speciic guidelines and support given to the ecotourism
companies to encourage conservation mindfulness. In the Genting Highlands,
massive developments over recent decades have altered the forested landscape and
environment and consequently affected the viability of all species of lora and fauna.
In the development of management plans for such sites, the effects of how changes in
land use negatively impact on the environment, and how this can be mitigated, must
be researched.
The occurrence of Geostachys species in tourist sites also means additional
conservation measures to protect the taxa must be adopted. For instance, although the
habitat is well-protected in National and State Parks, the populations of Geostachys
species themselves may not be. Stricter rules and regulations should be imposed on
forest trails which are heavily used by tourists. These should include a total ban of
removal of any lora and fauna found in the forests, and higher ines if caught doing so.
Hikers should not be allowed to clear vegetation for the setting up of camps anywhere
in the forest outside designated camping grounds. This is to protect the indiscriminate
or unintentional removal of rare plants. Also, unauthorised clearing of new forest
paths must be prohibited for the same purpose, to avoid the killing and trampling of
plants and disturbance of the ecosystem. Prominent notice boards should be erected at
strategic locations to serve as reminders.
There are a few ecotourism models that have set good examples of balanced
development, such as can be found on Fraser’s Hill and Maxwell’s Hill. These places
have developed into niche-market tourist attractions. On Fraser’s Hill, the annual bird
race competition that attracts thousands of people has proven that retaining forested
areas is rewarding. The annual event has also directly increased the public’s awareness
of forest conservation. On Maxwell’s Hill, where the state government-owned resort
has full administrative authority, including accessibility to the peak, the impact from
tourism is very much minimized. For example, only authorised vehicles have access
to the hill. Tourists have to be carried in these vehicles from the base of the hill to their
destinations and the somewhat antiquated transport style adds allure to the concept of
the cool private highland getaway.
The threat assessment process itself has been a daunting task. It has been long
believed that taxa which are conined to protected areas are not really at any risk
of extinction due to decades-old protection legislation (Chua, 2012). However, each
should be reviewed on a case by case basis. It has not been easy to determine the
conservation status for some species, especially those from protected habitats where
threats are nevertheless believed to exist. The three species in Taman Negara National
Park may at irst seem to it into the Rare (RA) category (sensu Chua, 2012), but
further analyses showed that they deserved a threatened category. Although their AOO
qualiied the species under both categories, i.e., not more than 10 km2, the RA category
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Conservation of Peninsular Malaysian Geostachys
is not suitable for species under threat. Therefore, for the reasons discussed above, the
Vulnerable category is more appropriate.
It is clear that the survival of Geostachys is very much dependent on the
management strategies employed by forest managers who in turn have to balance their
management practices with their obligations to deliver government policy. What is
needed is that Malaysia’s biodiversity heritage is given ample attention and protection
so that its full potential can be appreciated not only now but also by future generations.
ACKNOWLEDGEMENTS. I am grateful to Datuk Seri Lim Chong Keat for irst bringing
the genus to my attention, and for his sincere guidance throughout the process. Many of the
localities would not have been rediscovered without his keen knowledge. Dr Lillian Chua was
very helpful with her critical comments and suggestions during the early stage of the manuscript.
Her expertise with conservation assessments is much appreciated. Sincere gratitude also goes
to Hamidah Mamat and Wendy Yong S.Y. for their technical input in the preparation of the
maps. Further thanks are due to the herbarium curators at K, KEP, KLU, SING and UKMB
for access to specimens. The work could not have been completed without the assistance of
the staff of the Department of Wildlife and National Parks (PERHILITAN), Johor State Park,
Penang Botanic Gardens and Universiti Kebangsaan Malaysia. The State Forestry of Kedah,
Penang, Perak and Pahang granted the forest permits.
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