Publications
“The park is the people”: World heritage as antipolitical and neocolonial environmental governance in mulu park, Malaysia
Gunung Mulu National Park exemplifies the neocolonial and antipolitical dimensions of global conservation governance. The study reveals how the World Heritage Convention, through its technical and scientific frameworks, prioritizes nature for global enjoyment while marginalizing Indigenous voices and displacing local communities. By analyzing site selection processes in Mulu Park, Malaysia, researchers demonstrate how these practices normalize 'global' values, often facilitated by international non-governmental organizations (BINGOs), thereby perpetuating land grabs and cultural displacement without meaningful local participation.
A new species of Leptolalax (Anura: Megophryidae) from Gunung Mulu National Park, Sarawak, East Malaysia (Borneo)
Researchers have identified a new species of frog, Leptolalax, within Gunung Mulu National Park, Sarawak, East Malaysia (Borneo). This discovery was made through morphological analysis, distinguishing the new species from previously described ones, including Leptolalax dringi and Leptolalax gracilis. The new species exhibits unique traits such as large body size, a rounded snout, bipartite subgular vocal sac in males, and a distinctive advertisement call with high-frequency modulation (7225-9190 Hz). Additionally, it lacks supraaxillary glands and ventrolateral glandular ridges, further setting it apart. The study highlights the rich biodiversity of Gunung Mulu National Park and contributes to the understanding of amphibian diversity in Borneo.
Parasitoids reared from a stick insect egg mass in Sarawak (Hymenoptera: Ichneumonidae and Torymidae), with a new species of Palpostilpnus and a new host association for Rhynchoticida
Researchers document new host associations for two egg parasitoid species, Palpostilpnus mulu (Ichneumonidae) and Rhynchoticida ovivora (Torymidae), both reared from a stick insect egg mass in Gunung Mulu National Park, Sarawak. The study describes P. mulu as a new species and clarifies the host of R. ovivora for the first time in Borneo. The findings provide insights into the ecological relationships between Phasmatodea (stick insects) and their hymenopteran parasitoids, while also discussing phasmid egg morphology as an adaptation against parasitism. This report contributes to the understanding of rarely documented parasitoid-host dynamics in this UNESCO-listed tropical rainforest ecosystem.
Pervasive speleogenetic modification of cave passages by nitrification of biogenic ammonia
Research in Gunung Mulu National Park, Sarawak, reveals a previously undocumented process of cave passage modification driven by microbial nitrification of biogenic ammonia. This study demonstrates that ammonia gas released from bat and swiftlet guano is oxidized on moist cave surfaces, producing aggressive nitric acid solutions that accelerate limestone dissolution. The resulting geomorphological features overwrite original passage morphologies, challenging traditional interpretations of speleogenesis in tropical environments. Geomorphological and geochemical evidence suggests this biogenic overprint is more widespread than previously recognized, with profound implications for understanding post-speleogenetic modification and secondary cave enlargement.
Tropical temperature evolution across two glacial cycles derived from speleothem fluid inclusion microthermometry
A new study reveals that tropical temperatures in Northern Borneo, specifically within Gunung Mulu National Park, closely tracked Southern Hemisphere temperatures and atmospheric CO₂ concentrations over two glacial cycles. Using speleothem fluid inclusion microthermometry—a highly precise method based on the density of trapped water—the research reconstructed cave temperatures spanning 127,000 years, from 460 to 333 thousand years ago. The findings indicate that deglacial warming in this region was accompanied by relatively dry conditions, with temperature changes reaching amplitudes of up to 4.3°C between glacial and interglacial periods. Notably, the study also identifies a site-specific Antarctic amplification factor, suggesting stronger polar temperature responses compared to tropical regions.
An economic assessment on public well-being for biodiversity conservation in Gunung Mulu National Park, Sarawak, Malaysia
A mean willingness to pay of MYR40.61 (USD9.60) per park entry for biodiversity conservation in Gunung Mulu National Park was identified, revealing that public support is strongly influenced by attitude and experience rather than awareness or economic factors. The study, involving 87 visitors and 99 local community members, used validated questionnaires to assess preferences and well-being, finding that socio-demographic and environmental factors significantly shaped willingness-to-pay (WTP) for conservation efforts. Notably, respondents with lower knowledge but high positive attitudes showed strong support for reduced entrance fees, while economic considerations did not predict WTP. This research highlights the complex interplay between social values, conservation awareness, and economic valuation in protected areas, offering insights to guide sustainable tourism policies.
Diurnal activity of a trawling insectivorous bat species, Myotis horsfieldii , in Gunung Mulu National Park, Malaysian Borneo
Researchers have documented extensive diurnal activity of Horsfield’s bat (Myotis horsfieldii) in Gunung Mulu National Park, Malaysian Borneo, challenging the conventional understanding that bats are predominantly nocturnal. Over six years (2015–2020), repeated observations at 14 sites revealed these bats foraging along streams and rivers during daylight hours, confirmed by bioacoustics showing feeding buzzes. This behavior persists despite the presence of diurnal avian predators like bat hawks (Macheiramphus alcinus) and competitors such as cave swiftlets (Aerodramus spp.). The findings suggest that this trawling insectivorous species may exploit daytime foraging to avoid night-time competition with other bats, potentially indicating a broader ecological strategy in the region.
From Tourism to Agriculture: Elucidating Community Well-being in Gunung Mulu National Park during the COVID-19 Pandemic
Local communities surrounding Gunung Mulu National Park (GMNP) have traditionally relied on ecotourism for economic stability. However, the COVID-19 pandemic disrupted tourism, forcing residents to seek alternative livelihoods, particularly in small-scale agriculture despite limited expertise. A study involving 99 community members and eight key informants found that while residents were satisfied with environmental and social aspects, their economic well-being declined significantly due to reduced income. This shift highlights the need for targeted interventions, such as agricultural skill-building programs, to enhance disaster resilience and food security in isolated communities.
Redescription of adults of Kribiodorum belalong Cranston (Diptera, Chironomidae, Chironomini) from Gunung Mulu National Park, Sarawak, Malaysia
Researchers have provided the first comprehensive redescription of the adult male and description of the adult female of Kribiodorum belalong, a midge species (Diptera: Chironomidae) from Gunung Mulu National Park, Sarawak, Malaysia. The study addresses gaps in previous descriptions by detailing key morphological features, including wing dimensions, abdominal coloration, and hypopygial structures, which were previously unavailable due to the teneral state of the sole male specimen used in earlier work. This contribution enhances taxonomic understanding and offers new insights into the phylogenetic position of Kribiodorum within Chironomidae. The findings are based on recently collected specimens, providing a more complete morphological characterization than prior accounts.
Community well-being dimensions in Gunung Mulu National Park, Sarawak, Malaysian Borneo
Local communities around Gunung Mulu National Park express satisfaction with environmental conditions despite ongoing issues such as river water cloudiness and wildlife threats. However, economic dissatisfaction is pronounced due to low incomes exacerbated by the COVID-19 pandemic. Socially, there's a demand for improved services like treated water and electricity. Authority interventions, including road proposals and financial assistance, significantly influence community support for park policies. The study highlights the need for a bottom-up approach to address multi-dimensional well-being aspects for holistic national park management.
Karst Corrosion and Erosion in Some Areas of Gunung Mulu National Park (Sarawak, Northern Borneo): New Data and Comparision with Lessini Mountains, Veneto, Italy
New data on karst corrosion rates in Gunung Mulu National Park, a UNESCO World Heritage Site and one of the most studied karst areas globally, reveal nuanced patterns of limestone dissolution. Unlike previous studies suggesting weight loss due to dissolution, recent findings indicate that some rock tablets experienced both dissolution and erosion while others accumulated calcareous incrustations without gaining weight. This study, conducted over three years with permits from the Sarawak Forest Corporation, used limestone tablets as 'data loggers' to measure dissolution rates in both underground and outdoor environments. Comparisons with existing data from the 1970s-80s and a study in Italy's Lessini Mountains highlight the complexity of karst processes, contributing to a deeper understanding of speleogenesis in this ecologically significant region.
Moving towards Post-COVID-19: A Study of Ecotourism Destinations Competitiveness in Sarawak
A significant relationship between inherited and supporting resources—such as cultural heritage attractions and accessibility—and destination competitiveness was identified, offering critical insights for post-COVID-19 ecotourism recovery. The study, conducted across five Sarawak national parks including Gunung Mulu National Park, used a survey of 177 domestic tourists to assess factors like natural resources, cultural heritage, and service quality. Path modeling revealed that effective resource management enhances competitiveness, particularly in open-space destinations with minimal contact—ideal for post-pandemic travel trends. Findings provide actionable strategies for policymakers and operators to sustainably revitalize ecotourism, aligning with global shifts toward safer, nature-focused tourism.
Revisiting perceived determinants of tourism destination competitiveness among tourists: The case of national parks in Sarawak, Malaysia
A study on ecotourism competitiveness in Sarawak, Malaysia, reveals that destination resource constructs—including natural resources, cultural heritage attractions, range of activities, accessibility, and tourism service quality—significantly enhance tourist perceptions of competitiveness. Using partial least square structural equation modeling (PLS-SEM) with data from 188 respondents across five national parks (Bako, Niah, Kubah, Gunung Gading, and Gunung Mulu), the research demonstrates that endowed resources (natural and cultural assets), created resources (diversity of activities), and supporting resources (accessibility and service quality) collectively drive ecotourism competitiveness. This empirical evidence provides actionable insights for industry stakeholders, including business operators, policymakers, and tourism planners, to improve management and development strategies for natural tourism destinations.
Climate insights and lessons from Borneo stalagmites – 500,000 years to present
A two-decade study of stalagmites from Gunung Mulu National Park, Borneo, has uncovered critical insights into tropical climate dynamics spanning 500,000 years. These cave formations reveal complex patterns of rainfall and temperature variability, offering a detailed record of past climatic shifts in Southeast Asia. The research employs isotopic analysis to reconstruct environmental conditions, providing a high-resolution timeline that links regional climate behavior to global changes. This work enhances our understanding of tropical climate sensitivity and its response to long-term geological and atmospheric influences.
Okalia necopinata sp. nov. (Insecta, Coleoptera, Elmidae) from Gunung Mulu National Park in Sarawak (Malaysia)
Researchers have identified and described a new species of riffle beetle, Okalia necopinata sp. nov., from Gunung Mulu National Park in Sarawak, Malaysia. This discovery was achieved by combining morphological analysis with molecular data, specifically the standard barcoding fragment of the mitochondrial gene coding for cytochrome c oxidase subunit I (COI). The study highlights key distinguishing features such as the length of the granulated fifth elytral interval, elytral and pronotal punctation, aedeagal morphology, and the distal portion of the ovipositor. Notably, most examined Okalia species are flightless, inhabiting shallow streams within dense primary forests in limestone areas across West and East Malaysia. The identification key provided aids in distinguishing this new species from its known counterparts.
New herpetofaunal records from Gunung Mulu National Park and its surrounding areas in Borneo
A new amphibian and ten reptile species have been recorded for the first time in Gunung Mulu National Park (GMNP) or its surrounding areas in Borneo, contributing to the park's remarkable herpetofaunal diversity. Among these, Asthenodipsas jamilinaisi and Garthius chaseni represent new state records for Sarawak, while Cyrtodactylus muluensis extends its known range beyond GMNP. The study also documents the first detailed observation of male-male combat in the genus Dopasia buettikoferi, suggesting that two color morphs may belong to the same species based on genetic analysis. With a total of 108 amphibians and 104 reptiles now documented in GMNP, this research underscores the park's biodiversity and highlights the need for ongoing monitoring to better understand its herpetofaunal composition.
Study of Local Tourist Satisfaction in a Rural Destination at Mount Mulu National Park in Miri, Sarawak
A study reveals that Gunung Mulu National Park, renowned for its underground caves and virgin rainforests, holds significant potential for global tourism marketing. The research, employing a quantitative approach with random sampling via Google Forms, surveyed 500 local tourists to assess satisfaction levels. Key findings suggest that the park's unique natural attractions and cultural heritage experiences are strong draws, offering valuable insights for refining tourism programs. This study underscores the economic and community benefits of rural tourism, as defined by Malaysia's Rural Tourism Master Plan, while providing actionable data to enhance visitor appeal and international promotion.
Towards a regional call library: Classifying calls of a species-rich bat assemblage in a Bornean karst rainforest
A comprehensive call library for echolocating bat species in Gunung Mulu National Park, Borneo, was developed, enabling the automatic classification of most cave-roosting bats using discriminant function analysis. The study, spanning 2012–2017, recorded calls from 508 individuals across 31 species, with high accuracy in distinguishing species like Chaerephon plicatus and Miniopterus australis. However, classification success was lower for forest-roosting bats. This open-access database supports monitoring efforts within the park and highlights the ecological significance of threatened habitats outside its boundaries.
Two New Fern Species from Gunung Mulu National Park, Sarawak, Malaysian Borneo
Scientists have discovered two new fern species, Antrophyum hovenkampii and Pteris hovenkampii, within the biodiversity-rich Gunung Mulu National Park in Sarawak, Malaysian Borneo. Named in honor of Peter Hans Hovenkamp, a distinguished pteridologist, these findings contribute to the region's flora diversity. The research employed morphological comparisons alongside molecular phylogenetic analyses to elucidate their relationships. Key identifiers, distribution maps, and habitat descriptions are provided, along with updated identification keys for Antrophyum and Pteris species in Borneo. This discovery underscores the park's ecological significance as a UNESCO World Heritage Site and highlights the importance of systematic botany in documenting Earth's biological richness.
Zombie ant graveyard dynamics in Gunung Mulu National Park
Research on Ophiocordyceps unilateralis, a fungus that infects ants and controls their behavior to form 'zombie ant graveyards,' reveals that infected ants in Gunung Mulu National Park are found at higher elevations (28.9–57.6 cm) than previously documented in similar studies. This variation suggests that the optimal height for spore dispersal and fungal growth may be influenced by local environmental factors such as temperature and humidity. The study systematically mapped the spatial dynamics of infected ants across four sites, providing new insights into the ecological adaptability of this parasitic fungus in Bornean rainforests.
Destination Image towards Revisit Intention to Natural Protected Areas in Sarawak: A Study of Functional Characteristics
A study on ecotourism in Sarawak's national parks, including Gunung Mulu National Park, reveals that the perceived value for price significantly influences tourists' intention to revisit these protected areas. Unlike other factors such as natural and historical attractions or tourism infrastructure, price-value perception emerged as a critical driver of repeat visitation. The research, involving 283 local and foreign tourists, employed path modeling and bootstrapping techniques to analyze the relationship between functional characteristics of destination image and revisit intention. These findings underscore the importance of economic considerations in shaping sustainable ecotourism strategies for natural protected areas.
Extended Cave Drip Water Time Series Captures the 2015–2016 El Niño in Northern Borneo
A 12-year time series of cave drip water oxygen isotopes (δ¹⁸O) from Gunung Mulu National Park, northern Borneo, reveals strong correlations with rainfall δ¹⁸O variations over preceding months and captures the hydroclimatic impacts of the 2015–2016 El Niño. The study demonstrates that stalagmite δ¹⁸O records can reflect ENSO-related variability in regional hydroclimate, with drip water δ¹⁸O anomalies showing sustained positive shifts during the El Niño event. Nonlinear behavior at one monitoring site suggests time-varying contributions from longer-term reservoirs, highlighting the potential for high-resolution stalagmite reconstructions to characterize past climate dynamics in this UNESCO World Heritage Site.
Surface and underground fluvial activity in the Gunung Mulu National Park, Sarawak
Gunung Mulu National Park's limestone hills harbor extensive fossil and active cave systems, shaped by complex fluvial activity both above and below ground. The study reveals that the region's drainage pattern was initially influenced by northwest tilting of the sedimentary prism but was later modified by active uplift along a northeast-southwest axis, forming an elongate dome centered on Gunung Mulu. This geological evolution explains the distribution of cave systems and terraces in the Melinau valley. The research integrates sedimentary sequences with surface and underground hydrology to reconstruct the park's dynamic geomorphological history.
Interpretation of El Niño–Southern Oscillation‐related precipitation anomalies in north‐western Borneo using isotopic tracers
A strong link between El Niño–Southern Oscillation (ENSO) and precipitation anomalies in north-western Borneo, including Gunung Mulu National Park, has been identified using oxygen isotopic tracers. The study reveals that ENSO modulates the frequency of synoptic-scale wet conditions—such as those driven by the boreal summer intraseasonal oscillation (BSISO), Madden–Julian oscillation (MJO), and Borneo vortex (BV)—which in turn influence rainfall patterns over the region. By analyzing a 7-year isotopic dataset from two sites, researchers found significant correlations between seasonal isotopic anomalies and the Southern Oscillation index, as well as between isotopic signals and area-averaged rainfall anomalies (R = −0.65, p < 0.01). This suggests that ENSO-driven changes in atmospheric circulation patterns directly affect precipitation dynamics in Sarawak.
New records of guano-associated minerals from caves in northwestern Borneo
A groundbreaking study of ancient bat guano deposits in Gunung Mulu National Park, a UNESCO World Heritage Site in northwestern Borneo, has uncovered rare phosphate minerals, including variscite and fluorapatite. These findings expand the known mineralogical diversity associated with cave environments, particularly those influenced by bat guano. The research employed advanced analytical techniques to identify these minerals, revealing nano-particulate silica and niter alongside the more common phosphate compounds. This discovery not only contributes to our understanding of cave mineralization processes but also highlights the unique geological and ecological significance of Gunung Mulu National Park.
Outstanding Universal Values of the Malaysian Forests
Malaysian forests, including Gunung Mulu National Park and Kinabalu Park, exhibit diverse Outstanding Universal Values (OUV) that qualify them for UNESCO World Heritage status. While Peninsular Malaysia’s forests lack this recognition, three reserved areas—Forest Research Institute Malaysia (FRIM), Royal Belum National Park, and Gombak Selangor Quartz Ridge—are under consideration. The study highlights how these sites meet OUV criteria, emphasizing their ecological significance for flora and fauna while reflecting Malaysia’s rich natural heritage. By analyzing the distinct OUV applied to different forests, the research underscores the uniqueness and conservation importance of Malaysian ecosystems.
The Begonia flora of Gunung Mulu and Gunung Buda National Parks, Sarawak, Borneo, including five new species
A new account of the Begonia flora in Gunung Mulu and Gunung Buda National Parks, Sarawak, Borneo, identifies five previously undescribed species (Begonia argentii, B. jokwaniana, B. lansatensis, B. muluensis, and B. vulgarioides) and one new record for the region (Begonia chlorocarpa). The study provides illustrated descriptions and a key for identification, expanding the known diversity of Begonias in these UNESCO-listed tropical rainforests. This research contributes to the documentation of Borneo's rich flora while offering tools for future taxonomic studies.
New record of a phoretic flea associated with earwigs (Dermaptera, Arixeniidae) and a redescription of the bat flea Lagaropsylla signata (Siphonaptera, Ischnopsyllidae)
A new record of the phoretic flea Lagaropsylla signata, previously known only from Java, Indonesia, has been documented in Deer Cave, Gunung Mulu National Park, Sarawak, Malaysia. This discovery reveals an obligate parasitic relationship between L. signata and the earwig Arixenia esau, which serves as a vector for accessing bat hosts. The study also includes a redescription of L. signata and compares its association with A. esau to that of another phoretic flea, L. turba, found in peninsular Malaysia. The research highlights the evolutionary parallel between these fleas, earwigs, and their bat hosts, providing insights into their natural history and co-existence within cave ecosystems.
A new species of Syrrhopodon (Calymperaceae) from Sarawak
A new species of the moss genus Syrrhopodon (Calymperaceae) has been identified from limestone mountains in Gunung Mulu National Park, Sarawak. The discovery was based on a small series of specimens collected by J.M. Camus and previously reported by Ellis (1991). This robust, higher-altitude species adds to the biodiversity of the region's bryophyte flora. The study highlights the importance of thorough taxonomic examination in revealing cryptic diversity within mosses, particularly in ecologically significant areas like Gunung Mulu National Park.
An ornithological survey of Gunung Mulu National Park, Sarawak, Malaysian Borneo
A comprehensive ornithological survey of Gunung Mulu National Park, Sarawak, Malaysian Borneo, recorded 244 bird species across its elevational gradient from 50 to 1,850 meters, including 32 species not previously documented in the park's checklists from 1979–82. This study highlights the rich avian diversity of this isolated, biodiverse site, characterized by its spectacular limestone structures and extensive primary forest. Researchers employed a combination of observation and mist-netting techniques over a 2.5-month period to document species distribution and compare findings with historical data, providing new insights into the park's ornithological composition.
Biodiversity (Chapter 1)
Gunung Mulu National Park, a UNESCO World Heritage Site renowned for its caves and karst landscapes, exhibits remarkable biodiversity shaped by diverse habitats and ecosystems. A study highlights the species richness and distribution patterns of biodiversity in this unique region, drawing on research conducted during an expedition to Borneo in 1978. The analysis reflects on the ecological dynamics of dung beetles while exploring broader trends in global biodiversity over 500 million years. This work underscores the significance of habitat diversity as a driver of species richness and ecosystem resilience.
Small mammals from Miri, northeastern region of Sarawak, Malaysian Borneo: note on new locality records
A survey of small mammals in Gunung Mulu National Park, part of the UNESCO-listed Mulu Caves National Park, revealed nine new locality records for the northeastern region of Sarawak, Malaysian Borneo. Among these, eight bat species (Dyacopterus spadiceus, Megaerops wetmorei, Nycteris tragata, Hipposideros cineraceus, Hesperoptenus blanfordi, Kerivoula pellucida, Murina suilla, and Myotis muricola) and one squirrel (Sundasciurus brookei) were documented. Notably, Megaerops wetmorei was recorded for the first time in Sarawak. The study, conducted using ground-level and canopy mist-nets, harp traps, and cage traps, found Gunung Mulu National Park to have the highest small mammal diversity (29 species), followed by Niah National Park (19 species) and Lambir Hills National Park (17 species). This research contributes to understanding biodiversity in this ecologically significant region.
Description of the final stadium larvae of Onychargia atrocyana Selys, 1865 from Sarawak, identified using DNA barcoding (Odonata: Zygoptera: Platycnemididae), with an overview of larval characters in the Platycnemididae
Scientists have identified the final stadium larva of Onychargia atrocyana, a damselfly species endemic to Borneo, using DNA barcoding techniques. This marks the first description of the larval stage for any member of the subfamily Onychargiinae. By comparing mitochondrial COI gene sequences from larval specimens collected in Gunung Mulu National Park with those of known adult specimens across Sarawak and West Malaysia, researchers confirmed the species' identity with high certainty due to its taxonomic isolation. The study also provides a comparative analysis of larval morphology within the Platycnemididae family, offering insights into potential phylogenetic relationships. This discovery contributes to our understanding of damselfly biodiversity in Southeast Asia.
Outstanding Universal Value (OUV) as the Foundation for Conservation Education Betwixt Local Community in Malaysia
Outstanding Universal Value (OUV), as defined by UNESCO, can serve as a robust foundation for conservation education among local communities in Malaysia. This study analyzed the applicability of OUV criteria—focusing on authenticity and characteristics unique to Malaysia—to three World Heritage Sites: Melaka and Georgetown, Kinabalu Park, and Gunung Mulu National Park. By synthesizing existing literature on OUV and conservation education, researchers demonstrated that integrating these criteria into educational frameworks strengthens local engagement with heritage preservation. The findings suggest that OUV-based education can bridge gaps between government conservation goals and community values, fostering long-term stewardship of Malaysia's natural and cultural heritage.
Description of the tadpoles of three rare species of megophryid frogs (Amphibia: Anura: Megophryidae) from Gunung Mulu, Sarawak, Malaysia
Three rare megophryid frog species—Leptobrachella brevicrus, Leptolalax dringi, and Megophrys dringi—endemic to Borneo, were confirmed through genetic analysis of their tadpoles and adults in Gunung Mulu National Park. DNA barcoding using 16S rRNA mitochondrial gene sequences validated the distinct species status. The study revealed unique adaptations: L. brevicrus and L. dringi tadpoles exhibit fossorial traits, such as elongated bodies and small eyes, suited for gravel-bed stream habitats, while M. dringi larvae thrive at pool surfaces. Morphometric data and ecological comparisons with congeners were also provided, contributing to the understanding of these elusive species' biodiversity in a UNESCO-listed site.
First Record of the Gekkonid Genus Cnemaspis Strauch, 1887 from Gunung Mulu National Park, Northern Sarawak, East Malaysia may Represent an Undescribed Species
Researchers have documented the first occurrence of the gecko genus Cnemaspis in Gunung Mulu National Park, a UNESCO World Heritage Site in northern Sarawak, East Malaysia. This discovery extends the known range of Cnemaspis cf. kendallii by 550 km northeastward, marking its most northerly record on Borneo. The findings suggest that similar limestone karst habitats in neighboring regions like Sabah, Brunei, and Kalimantan may also harbor this genus. Notably, visible differences in the Mulu specimen compared to others across its distribution range imply the potential presence of an undescribed, cryptic, or locally endemic Bornean species. This record underscores the ecological significance of Gunung Mulu National Park as a critical conservation area of international importance.
In memory of Geoff Wong
A poignant tribute to Geoff Wong, highlighting his contributions to the study of carnivorous plants in Gunung Mulu National Park, Sarawak. The article features a striking image of Ch'ien Lee posing on a rock face above Deer Cave, approximately 200 meters above ground level, without a safety helmet—a testament to Wong's adventurous spirit and dedication to fieldwork. While the publication does not delve deeply into specific scientific findings, it serves as an homage to Wong's legacy in exploring and documenting the unique flora of this UNESCO-listed site, particularly focusing on Nepenthes campanulata. The piece reflects on his pioneering work and its impact on botanical research.
Observations of the natural history and ecology of Nepenthes campanulata
A pioneering field survey of Nepenthes campanulata, a rare pitcher plant endemic to limestone cliffs in Borneo, reveals its unique ecological role and expands its known geographical range. The study found that Diptera (flies) dominate the prey in its pitchers, followed by Formicidae (ants), with only three metazoan species inhabiting the pitchers—a remarkably simple community for this genus. The plant's distinctive pitcher structure suggests adaptations to its highly specialized limestone cliff habitat. Previously recorded from just two locations—Mt. Ilas Bungaan in East Kalimantan and Gunung Mulu National Park in Sarawak—the species was unexpectedly observed during a recent expedition in Palawan, indicating a significant extension of its range. This research provides critical insights into the biodiversity and conservation priorities of limestone ecosystems within UNESCO World Heritage Sites like Gunung Mulu National Park.
Onychogomphus marijanmatoki, a new species from Sarawak, Borneo (Odonata: Anisoptera: Gomphidae)
A new species of dragonfly, Onychogomphus marijanmatoki, has been discovered in Gunung Mulu National Park, Sarawak, Malaysian Borneo. This rare find represents one of only two known onychogomphine species from the region and is distinguished by unique characteristics in its genital ligula and terminal appendages. The discovery sheds light on the biodiversity of this UNESCO-listed site, which is renowned for its exceptional karst landscapes and rich ecological diversity. The study highlights the importance of thorough taxonomic research in understanding the intricate and often overlooked species that inhabit such globally significant areas.
A new species of Leptolalax (Anura: Megophryidae) from Gunung Mulu National Park, Sarawak, East Malaysia (Borneo)
Researchers have identified a new species of frog, belonging to the genus Leptolalax, within Gunung Mulu National Park, Sarawak, East Malaysia (Borneo). This discovery was made through morphological analysis, distinguishing it from previously described species such as Leptolalax dringi and Leptolalax gracilis. The new species exhibits unique traits including a large body size, rounded snout, bipartite subgular vocal sac in males, basal toe webbing, and a distinctive advertisement call with high-frequency modulation. This finding highlights the biodiversity richness of Gunung Mulu National Park and contributes to our understanding of amphibian diversity in Borneo.
Revision of Begonia (Begoniaceae) from the Melinau Limestone in Gunung Mulu National Park and Gunung Buda National Park, Sarawak, Borneo, including thirteen new species
A comprehensive taxonomic revision of Begonia species (Begoniaceae) from the Melinau limestone in Gunung Mulu National Park and Gunung Buda National Park, Sarawak, Borneo, reveals 13 new species, including Begonia apiensis, B. benaratensis, B. conniegeriae, B. divergens, B. lucychongiana, B. magentifolia, B. melinauensis, B. ramosissima, B. rhodoneura, B. umbratica, B. vulgare, B. yiii, and B. xiphophylloides. Additionally, a putative natural hybrid between B. conipila and B. lucychongiana is described. All species are endemic to the Melinau limestone, with 10 restricted to limestone habitats, highlighting the region's unique biodiversity. The study also documents the vegetation types and habitats of each species, noting that B. apiensis is Rare due to its extreme localization and threat from tourist activities, while others are Least Concern under IUCN criteria.
Safety planning in remote protected areas: lessons learned from a rescue in Gunung Mulu National Park, Sarawak, Malaysian Borneo
A critical analysis of safety planning in remote protected areas, such as Gunung Mulu National Park in Sarawak, Malaysian Borneo, reveals that effective rescue operations require meticulous preparation and adherence to established protocols. The study, led by Brian Clark—a seasoned National Park Manager with over 30 years of experience—highlights the importance of preemptive risk assessment, emergency response training, and coordination among stakeholders. Drawing from a real-life rescue scenario, it underscores gaps in current safety measures, particularly in remote or ecologically sensitive regions where adventure tourism thrives. The findings advocate for integrated safety frameworks that balance visitor experiences with environmental protection, offering actionable insights for park managers worldwide.
Trace metal and carbon isotopic variations in cave dripwater and stalagmite geochemistry from northern Borneo
A study of stalagmite geochemistry in Gunung Mulu National Park, northern Borneo, reveals that while trace metal ratios (Mg/Ca, Sr/Ca) and carbon isotopic composition (δ13C) show strong centennial-scale variations over the last 27,000 years, they are not reliable indicators of hydroclimate conditions in this tropical rainforest karst site. The research found that dripwater geochemistry exhibits minimal correlation with rainfall variability, suggesting a weak relationship between hydroclimate and geochemical proxies here. However, stalagmite δ13C records a consistent shift from C4 (savannah) to C3 (rainforest) vegetation during the transition from the Last Glacial Maximum to the Holocene, aligning with regional paleoenvironmental changes. The study utilized biweekly dripwater sampling and multi-year stalagmite geochemical analysis to explore these relationships.
Description of three Rhacophorus tadpoles (Lissamphibia: Anura: Rhacophoridae) from Sarawak, Malaysia (Borneo)
Scientists have identified and described the larval forms of three Rhacophorus frog species—R. rufipes, R. penanorum, and R. dulitensis—from Gunung Mulu National Park in Sarawak, Malaysia (Borneo). Using DNA barcoding techniques targeting the 16S rRNA mitochondrial gene, researchers confirmed that larval DNA sequences matched those of adult specimens found at the same site, ensuring accurate species identification. The study provides detailed morphological and coloration descriptions of these tadpoles, along with ecological notes. Notably, R. penanorum tadpoles exhibit adaptations for a lotic, rheophilous lifestyle, while those of R. rufipes and R. dulitensis are classified as generalized benthic-nectonic types. This discovery contributes to the understanding of amphibian biodiversity in one of Borneo's most ecologically significant regions.
A new karst-dwelling species of Kalophrynus (Anura: Microhylidae) from Gunung Mulu National Park, Borneo, Malaysia
Researchers have identified a new species of frog, belonging to the genus Kalophrynus (Anura: Microhylidae), endemic to the karst hills and mountains of Gunung Mulu National Park, Borneo. This discovery, described in detail by Dehling (2011), highlights unique morphological traits such as medium size, a distinct white dorsolateral line separating black dorsum and flanks, and a red to reddish-orange iris. The species is found at elevations between 70 and at least 1200 meters within the Melinau Limestone Formation. It differs from other Kalophrynus species through a combination of features including slender forelimbs, specific finger and toe proportions, and an advertisement call characterized by seven pulses lasting approximately 161 milliseconds with a dominant frequency between 2250–2650 Hz. This finding contributes to the understanding of biodiversity in karst ecosystems and underscores the significance of Gunung Mulu National Park as a critical habitat for endemic species.
Archaeological Survey in Gunung Mulu National Park, Miri, Sarawak
An archaeological survey in Gunung Mulu National Park, a UNESCO World Heritage Site renowned for its Paleocene-Eocene limestone formations and extensive cave systems, revealed that certain rockshelters within the park's Melinau and Gunung Api regions served as burial sites for the Tring community. Conducted by a collaborative team from Universiti Sains Malaysia, the Sarawak Museum Department, and the Department of Minerals and Geoscience Malaysia in 2010, the survey focused on limestone formations dating back to the Late Eocene-Early Miocene Period (Melinau Limestone) and the Miocene Period (Setap Shale Formation). The findings contribute to the understanding of prehistoric human activity and cultural practices in this ecologically significant region.
Influence of the arrival of Anoplolepis gracilipes (Hymenoptera: Formicidae) on the composition of an ant community in a clearing in Gunung Mulu National Park, Sarawak, Malaysia
The arrival of the invasive yellow crazy ant, Anoplolepis gracilipes, significantly altered the composition and diversity of an ant community in Gunung Mulu National Park, Sarawak, Malaysia. Between 2006 and 2009, researchers monitored the ant community in an artificial clearing using pitfall traps, identifying 42 species overall. After A. gracilipes arrived in 2007, community diversity declined, even before species richness decreased. Ecologically similar native species, such as Dolichoderus affinis, were among the first to disappear. The study suggests that abiotic factors like irregular flooding events may have further influenced community composition, potentially impacting invasive species more than native ones, which may be better adapted to these conditions.
Partitioning the impact of abiotic factors and spatial patterns on species richness and community structure of ground ant assemblages in four Bornean rainforests
A study in Gunung Mulu National Park, Borneo, reveals that environmental factors such as soil volume, tree density, and leaf litter significantly shape the species richness of ground-foraging ant communities, explaining 44% of the variance. While these abiotic parameters influence community composition only moderately (14%), spatial patterns also play a role but account for less variance in species distribution. The research suggests that environmental conditions determine the number of niches available to ants, while other factors like competition and neutral processes govern which species occupy those niches. This finding challenges purely spatial or neutral theories of community structure, highlighting the complex interplay between environmental and biotic forces in tropical ecosystems.
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