Ronglarp Sukmasuang

Kasetsart University | KU · Faculty of Forestry

Southeast Asia, a biodiversity hotspot, is at the center of the global wildlife extinction crisis. Despite being Threatened in the region, the population status of the leopard (Panthera pardus) is mostly unknown. We conducted the largest camera-trap study for leopard in Southeast Asia, encompassing seven sites across four countries, to estimate den...

A study on the size of the home range and factors affecting the appearance of the fishing cats using satellite collars at Khao Sam Roi Yot Wetland (KSRYWL), Prachuap Khiri Khan Province, Thailand was conducted from June 2022 to February 2024. This study aimed to determine the size of the home range and factors affecting the appearance of this speci...

Protected areas are designated to conserve biodiversity and provide a safe habitat for wildlife. This study aims to investigate the factors affecting elephant appearance and changes in habitat. The MaxEnt program was used to analyze data derived from the patrolling system with constant quality monitoring. Four categories of environmental factors, c...

Fishing cats, intimately connected to wetland habitats, face an escalating threat from human activities and environmental change. With its significant findings, this study offers a comprehensive insight into the dietary habits of fishing cats in a human-dominated wetland in coastal Thailand. By examining the scats of 192 fishing cats (Prionailurus...

Information on tropical Asian vertebrates has traditionally been sparse, particularly when it comes to cryptic species inhabiting the dense forests of the region. Vertebrate populations are declining globally due to land‐use change and hunting, the latter frequently referred as “defaunation.” This is especially true in tropical Asia where there is...

This study comprehensively reviewed various aspects of population status, distribution, conflict situations, and conservation strategies for managing human-elephant conflicts (HECs). The primary goal is to foster a clear understanding of the current status, issues, and problem-solving approaches to benefit elephant conservation and management. The...

The social system of animals involves a complex interplay between physiology, natural history, and the environment. Long relied upon discrete categorizations of “social” and “solitary” inhibit our capacity to understand species and their interactions with the world around them. Here, we use a globally distributed camera trapping dataset to test the...

Pheasants are indeed important species in various ecosystems. Studies of the abundance and factors influencing the presence of pheasant species have been conducted in the lowland areas of the Khao Ang Rue Nai Wildlife Sanctuary, Thailand, using camera trapping and species distribution models. A total of 23 factors, 2 bio-physiological, 2 geophysica...

Large and meso-carnivores play crucial roles in ecosystems. A systematic camera trap study conducted in Khao Yai National Park has confirmed that this area serves as a habitat for at least 18 significant carnivorous wildlife species from 6 families and 14 genera. Most of this wildlife is active during the night. The study identified 2 species as en...

Chanpradub K, Pattanawibool A, Saisamorn A, Bhumpakphan N, Chanthana S, Thongsong C, Ouansing Y, Suksawate W, Sukmasuang R. 2023. Abundance and habitat suitability of Siamese crocodiles (Crocodylus siamensis, Schneider 1801) in Phetchaburi River, Kaeng Krachan National Park, Thailand. Biodiversitas 24: 4755-4765. The Siamese crocodile (Crocodylus s...

Crop raiding are an increasing concern in wildlife conservation. This study identified the environmental factors that cause wild Asian elephants (Elephas maximus) to enter sub-urban and rural areas and share resources with humans in the Eastern Economic Corridor (EEC) in the eastern part of Thailand. The snowball method was used to interview villag...

Article Info Importance of the work: Urban ecosystems are among the most polluted due to anthropogenic development, with humans and wildlife being affected by this pollution. Objectives: To examine the presence of some birds and their correlation to pollution in the kind of anthropogenic noise and particulate matter (PM). Materials & Methods: Sixty...

This study used results from camera traps set for Dhole (Cuon alpinus) and their prey during 2017-2020 in Khao Yai National Park to assess the species richness of ground-dwelling birds and identify abundance and also temporal appearance of the species in the area. We selected only the Pheasant species that typically forage on the ground to investig...

Chanachai Y, Nathalang A, Duengkae P, Sukmasuang R. 2022. Species diversity, abundance, and movement of small mammals in the dry evergreen forest at Khao Yai National Park, Thailand. Biodiversitas 23: 5892-5901. Small mammals play an integral role in the forest ecosystem. This research was conducted on The Mo Singto Forest Dynamics Plot, Khao Yai N...

Sukmasuang R, Bhumpakphan N, McShea WJ, Wajjwalku W, Siriaroonrat B, Kamolnoranart S, Yindee M, Nipanan T, Maleehuan B, Khanthathongsakuldee K, Pongcharoen C, Sutummawong N, Thomas W. 2022. Review: The status of the endangered Eld’s deer (Rucervus eldii) and conservation actions in Thailand. Biodiversitas 23: 5020-5034. The endangered Eld’s deer (R...

Yarnvudhi A, Leksungnoen N, Siri S, Ponpithuk Y, Sukmasuang R, Duengkae P, Pongcharoen C, Sutummawong N, Marod D, Wachrinrat C, Premashthira A, Tor-ngern P, Poungcharean S, Hermuk S, Kachina P. 2022. Monetary evaluation of supporting ecosystem services as a habitat provider for birds in Thailand urban park. Biodiversitas 23: 4747-4758. Supporting s...

Tigers (Panthera tigris) have disappeared from over 90% of their historical range, and extant populations face habitat loss, direct poaching, and prey depletion in otherwise suitable habitats. In Thailand, tiger numbers continue to decline due to prey depletion, yet a few strongholds remain. Recently, tigers have been detected in the Southern Weste...

Rattanawanawong N, Bhumpakphan N, Kutintara U, Sukmasuang R. 2022. Wildlife-vehicle collisions in Khao Yai National Park, Thailand: Impact on native species for some conservation management. Biodiversitas 23: 3050-3061. Wildlife-vehicle collisions (WVCs) remain a major challenge in wildlife management worldwide, especially in conservation areas wit...

The relationship of the occurrence of key wildlife species and other wildlife in the ecosystems is complex and unique as a result of interactions between species as well as responses to complex environments. Spatio-temporal analysis of dholes (Cuon alpinus) in Khao Yai National Park, Thailand, aimed to study of the coexistence of the dhole with its...

Pla-ard M, Sukmasuang R, Uthairasmee S. 2022. Some population characteristics and viability of captive Asian elephant (Elephas maximus) in Thailand. Biodiversitas 23: 1072-1081. Sustaining long-term viable populations of captive Asian elephants poses a challenge in managing the existing populations. Therefore, studies of the characterization and lo...

Pla-ard M, Khioesree N, Sungkalak B, Nathalang A, Thomas W, Uthairatsamee S, Paansri P, Chanachai Y, Sukmasuang R. 2021. Population characteristics and habitat suitability of Khao Yai National Park, Thailand for Asian elephant and five ungulate species. Biodiversitas 23: 231-243. This study of population characteristics and habitat suitability of A...

This study on the monitoring of the diversity and abundance of wildlife around the wildlife corridor area on Highway 304, which passes through Khao Yai and Thap Lan National Parks, was conducted during September 2017 and May 2021 using camera traps to constantly monitor the area. A total of at least 51 wildlife species from 30 families, 14 orders w...

Hakim L, Widyorini R, Nugroho WD, Prayitno TA. 2021. Radial variability of fibrovascular bundle properties of salacca (Salacca zalacca) fronds cultivated on Turi Agrotourism in Yogyakarta, Indonesia. Biodiversitas 22: 3594-3603. Fibrovascular bundles have properties variability not only based on species and varieties but also parts of species. This...

Pla-ard M, Hoonheang W, Kaewdee B, Panganta T, Charaspet K, Khoiesri N, Paansri P, Kanka P, Chanachai Y, Thongbanthum J, Bangthong P, Sukmasuang R. 2021. Abundance, diversity and daily activity of terrestrial mammal and bird species in disturbed and undisturbed limestone habitats using camera trapping, Central Thailand. Biodiversitas 22: 3620-3631....

Habitat connectivity is crucial for the conservation of species restricted to fragmented populations within human-dominated landscapes. However, identifying habitat connectivity for apex predators is challenging because trophic interactions between primary productivity and prey species influence both the distribution of habitats, and predator movem...

The study of the spatial-temporal overlap of top predators and their prey is important to understand competition among predators and predator-prey relationships so that the viable populations of predators and other animals can be sustained. This research aimed to study the abundance of three top predators: Dhole (Cuon alpinus), tiger (Panthera tigr...

Sukmasuang R, Suksavate W, Songsasen N, Khiowree N, Charaspet K, Pla-ard M, Chanachai Y, Thomas W, Srinopawan K. 2020. Home range, movement and habitat selection of dholes (Cuon alpinus) in Khao Yai National Park, Thailand. Biodiversitas 21: 5915-5926. This study aimed to examine the home range, movement and habitat selection of dholes (Cuon alpinu...

Charaspet K, Sukmasuang R, Khoewsree N, Pla-ard M, Chanachai Y. 2020. Prey species and prey selection of dholes at three different sites in Thailand. Biodiversitas 21: 5248-5262. The study of prey species and prey selection of Dholes at 3 different sites was conducted at Khao Yai National Park, Salak Pra, and Huai Kha Khaeng Wildlife Sanctuaries fr...

The Laotian rock rat or Kha nyou (Laonastes aenigmamus) is a small mammal species that was discovered in Central Lao People's Democratic Republic (Lao PDR) in 1996. After this discovery, the Laotian rock rat was recognized as a living fossil of the family Diatomyidae, other members of which have been extinct more than 11 million years. Previous stu...

Sukmasuang R, Charaspet K, Panganta T, Pla-ard M, Khioesree N, Thongbanthum J. 2020. Diversity, abundance, activity period, and factors affecting the appearance of wildlife around the corridors between Khao Yai-Thap Lan National Parks, Thailand by camera trapping. Biodiversitas 21: xxxx. The study on diversity, abundance, activity period, and facto...

Sukmasuang R, Charaspet K, Reontik J, Pla-ard M. 2020. Temporal overlap of carnivorous mammal community and their prey in Khao Ang Rue Nai Wildlife sanctuary, Chachoengsao Province, Thailand. Biodiversitas 21: 922-932. This study on the temporal overlap of the carnivorous community and their prey in Khao Ang Rue Nai Wildlife Sanctuary was conducted...

Khoewsree N, Charaspet K, Sukmasuang R, Songsasen N, Pla-ard M, Thongbantum J, Kongchaloem W, Srinopawan K. 2020. Abundance, prey, and activity period of dholes (Cuon alpinus) in Khao Yai National Park, Thailand. Biodiversitas 21: 345-354. The abundance and occupancy of dholes in Khao Yai National Park are the highest among found carnivorous mammal...

The dhole ( Cuon alpinus ) is one of the least frequent studied endangered canid species and many aspects of ecological knowledge about this species are lacking. The objectives of this study were to investigate the spatial movement of dholes, prey abundance, prey selection, and prey overlaps with other large carnivorous species in the Huai Kha Khae...

The diverse large mammal communities found in Asian dry forests and savannas should segregate based on their diet selection. We examined the diet composition of sympatric ungulate species using metabarcoding to determine whether their diet was segregated and whether obvious attributes (i.e., body size, phylogeny, ecology) explained the structure. W...

Charaspet K, Sukmasuang R, Khoewsree N, Pla-ard M, Songsaen N, Simchareon S. 2019. Movement, home range size and activity pattern of the golden jackal (Canis aureus, Linneaus, 1758) in Huai Kha Khaeng Wildlife Sanctuary, Thailand. Biodiversitas 20: 3430-3438. We studied the movement patterns, monthly home range sizes, and activity patterns of the g...

Menkham K, Sukmasuang R, Pla-Ard M, Charaspet K, Panganta T, Trisurat Y, Bhumpakphan N. 2019. Population and habitat use of Asian elephants (Elephas maximus) and five ungulate species in Khao Ang Rue Nai Wildlife Sanctuary, Chachoengsao Province, Thailand. Biodiversitas 20: 2213-2221. This study on the Asian elephant (Elephas maximus) population, h...

The aim of this study was to investigate the population and habitat of wild elephants in the Khao Yai National Park, to provide elephant population densities using the line transect method. Habitat suitability was also assessed based on the data obtained from the location of the species during monthly ranger patrol across the park area, with the ra...

The study of prey species and habitat use of dhole (Cuon alpinus) in Salakpra Wildlife Sanctuary was conducted regularly during May 2013 to April 2014. The scats were collected and fecal analysis to identify prey species were used. Percent frequency occurrence of prey were calculated. Relative abundance (RA) of dhole and their prey species was stud...

The status and distribution of small carnivores in Thailand are poorly documented even though parts of the country fall within a global core area for small carnivore conservation. Small carnivore records were compiled from most camera-trap programmes in Thailand during 1996–2013, from 21 survey areas with a total effort of about 80,000 camera-trap...

Although small cats are presumed important as mesopredators in mammalian food chains, they have been largely ignored by biodiversity assessments of Thailand’s pro- tected areas. In November 2009, a workshop involving regional specialists and parti- cipants from local universities, conservation organizations and government agencies was convened to a...

The behaviour of wild cats is poorly understood. Using camera-trapping, we quantified temporal overlap among seven species of Asian wild cats, including tiger Panthera tigris and leopard Panthera pardus. Based on time stamp data from 780 camera-traps and 24 study sites from 14 protected areas across Thailand, we assessed terrestrial activity patter...

Southeast Asia's tropical forests suffer the highest rates of deforestation and disturbance of any on Earth, with poorly understood impacts on native fauna. Asian tapirs (Tapirus indicus) are among the least studied of the large mammals in these forests. Using records from 9 camera trap surveys in 7 of the largest (>1000 km2) protected area complex...

Clouded Leopard, Leopard, and Tiger are threatened felids in Southeast Asia, but little is known about the factors influencing their distributions. Using logistic regression, we assessed how habitat variables, prey detection patterns, and presence of intraguild predators affect the occurrence of these felids across 13 protected areas within Thailan...

The study of genetic diversity of selected pheasant species in captive conditions was conducted at Bang La Mung, Phu Kieo, Khao Pra Tap Chang and Huai Kha Khaeng Wildlife Breeding Stations during the period from September 2009 to August 2010. The objectives were to investigate pheasant genetic diversity and phylogenetic relationships among the spec...

No recent attempt has been made to survey dhole distribution, or to estimate remaining population numbers. We surveyed 15 protected areas in Thailand with camera traps from 1996 to 2010. We used the photo locations of dholes (n = 96) in the maximum entropy (MaxEnt) model along with six environmental variables to model current dhole distribution, as...

The purposes of this study were to study population characteristics of hog deer released into the wild, namely: density, age structure, sex ratio, recruitment rate, threats to hog deer, carrying capacity and inter-specific relationships, as well as to assess the population viability over time. In this study, direct observation was used to study the...

Here we document an additional observation of a Spotted Linsang Prionodon pardicolor in eastern Thailand, within Ta Phraya National Park. This observation is an important discovery for the Dong Phayayen and Khao Yai Forest Complex, as well as for biodiversity in Thailand.

The phylogeography and genetic diversity of wild elephants in the northeastern part of Thailand was studied at Phuwua Wildlife Sanctuary (PW), Nong Khai Province; Dongyai Wildlife Sanctuary (DY), Buri Rum Province; Phuluang Wildlife Sanctuary (PL), Loei Province and Phukhieo Wildlife Sanctuary (PK), Chaiyaphum Province. The study was procedured fro...

The population density of Asian elephants in Huai Kha Khaeng Wildlife Sanctuarywas studied between 1997 and 2003,covering a period of six years.A dung-count method wasused both in that area and in the area around Khao Nang Rum Wildlife Research Station(KNRWRS).Data were collected consecutively at six other study sites.Sex ratio,age structureand rec...