Diversity and seasonal abundance of small mammals in Bumdeling Ramsar Site, Trashiyangtse, Eastern Bhutan

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Research Paper 01/09/2019
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Diversity and seasonal abundance of small mammals in Bumdeling Ramsar Site, Trashiyangtse, Eastern Bhutan

Lam Norbu, Phuntsho Thinley, Phurpa, Ugyen Dechen, Pema Tshering
J. Bio. Env. Sci.15( 3), 36-45, September 2019.
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Small mammals have multiple ecological roles and are important components of the terrestrial ecosystems. They are important ecological indicators of changes in the natural surroundings. However, little is known about the small mammals in Bhutan. We conducted this study in the Bumdeling Ramsar Site in eastern region of Bhutan, aimed at enhancing our understanding of the species composition, abundance, and seasonal diversity of small mammals. We laid linear transects, each measuring 500 m in six different habitat types: agriculture land (AG), fallow land (FL), Alnus sp. forest (AF), open grassland (OG), riparian forest (RR), and oak forest (OF). We placed 17 collapsible Sherman live traps (23x9x8cm) in each transect to capture both ground dwelling and arboreal small mammals. We conducted the trapping exercise twice in the year 2016 (28 March to 28 April during the wet season and 1 to 30 October during the dry season), amounting to a total of 1,224 trap nights. We trapped a total of 135 individuals of small mammals, yielding seven species of rodents (90 individuals; 66.7%) and four of insectivores (45 individuals; 33.3%). We found significant difference in the number of individuals trapped among the six different habitats (X2=66.43, df= 5, P<0.05) with the highest in AG (59 individuals, 43.7%) and the lowest in OG (1 individual; 0.7%) during the dry and wet season, respectively. In order to promote diversity of small mammals in the Ramsar site, we recommend reducing free-range cattle grazing and restraining domestic dogs in the vicinity of the Ramsar site.


Aplin KP, Brown PR, Jacob J, Krebs CJ, Singleton GR. 2003. Field methods for rodent studies in Asia and the Indo-Pacific. Austalian Centre for International Agriculture Research. Canberra, Austrialia.

Assefa A, Srinivasulu C. 2019. Species composition and abundance of rodents in Kafta-Sheraro National Park, Ethiopia: preliminary results. Journal of Threatened Taxa 11(6), 13680-13689.

Avenant NL, Cavallini P. 2008. Correlating rodent community structure with ecological integrity, Tussen-die-riviere nature reserve, Free State Province, South Africa. Integrated Zoology (2), 212-219.

Baker PJ, Ansell RJ, Dodds PA, Webber CE, Harris S. 2003. Factors affecting the distribution of small mammals in an urban area. Mammal review 33(1), 95-100.

Bantihun G, Bekele A. 2015. Diversity and habitat association of small mammals in Aridtsy forest, Awi Zone, Ethiopia. Zoological Research 38(2), 88-94.

Bantihun G. 2012. Diversity and habitat association of small mammals in Aridtsy forest, Awi Zone, Ethopia. M.Sc. Thesis, Addis Ababa University, Addis Ababa.

Barnett A, Dutton J. 1995. Expedition field techniques: small mammals (excluding bats). London: Royal Geographical Society with IBG, London pp. 1-120.

Chane M, Yirga S. 2014. Distribution and diversity of small mammals in Borenasayint National Park, South Wollo, Ethiopia. International Journal of Biodiversity and Conservation 6(5), pp.415-421.

Cunningham DM, Moors PJ. 1996. Guide to the identification and collection of New Zealand Rodents. Wellington. Department of Conservation, New Zealand.

Datiko D, Bekele A. 2013. Species composition and abundace of small mammals in Chebera-Churchura National Park, Ethiopia. Journal of Ecology and Natural Environment 5(6), 95-102.

Demeke D, Afework B, Gurja B. 2007. Species composition, distribution and habitat association of rodents from Arbaminch forest and farmland, Ethiopia. African Journal of Ecology 45, 651-657.

Demeke D, Afework B. 2014. Habitat association and distribution of rodents and insectivores in Chebera-Churchura National Park, Ethiopia. Tropical Ecology 55(2), 221-229.

Dorji K. 2015. Small mammals in the small country: conservation and species diversity of small mammals in high altitude wetland of Phobjikha, Wangdi Phodrang. B.Sc. Thesis, Royal University of Bhutan, Bhutan.

Dorji K. 2016. Small mammals of Phobjikha Wetland: Sampling protocols to study small mammals. Rufford Foundation, United Kingdom.

Garshong RA, Attuquayefio DK, Holbech LH, Adomako JK. 2013. Distribution and abundance of small mammals in different habitat types in the Owabi Wildlife Sanctuary, Ghana. Journal of Ecology and the Natural Environment 5(5), pp.83-87.

Gupta S. 2011. Ecology of medium and small sized carnivores in Sariska Tiger Reserve, Rajasthan. PhD Thesis. Saurashtra University, Gujurat, India.

Gyeltshen J. 2015. Species diversity and distribution of rodents along the elevation gradients in Jigme Dorji National Park, Bhutan. Small mammal mail 7(1), 28-35.

Hoffmann A, Decher J, Rovero F, Schaer J, Voigt C, Wibbelt G. 2010. Field methods and techniques for monitoring mammals 482-529.

Jnawali RS, Baral HS, Lee S, Archarya KP, Upadhyay G, Pandey M. 2011. The Status of Nepal Mammals: The National Red List series. Department of National Parks and Wildlife Conservation, Kathmandu, Nepal.

Karuaera NAG. 2011. Assessing the effect of bush encroachment on species abundance, composition and diversity of small mammals at the Neudamm agriculture farms Khomas Region. M.Sc. Thesis, University of Namibia, Berlin.

Katuwal HB, Koirala S. 2012. Proceedings of third seminar on small mammal issues. Small Mammals Conservation and Research Foundation, Kathmandu, Nepal.

Klerk JJ. 2014. Investigating small mammal community structure as a possible indicator of improved habitat integrity in an area cleared of alien vegetation. Natural and Agricultural Sciences, Universty of Free State, Bloemfontein.

Menon V. 2014. Indian Mammals: A field Guide. Hachette Book Publishing India Pvt. Ltd, Delhi, India.

Molur S, Singh M. 2009. Non-volant small mammals of the Western Ghats of Coorg district, Southern India. Journal of Threatened Taxa 1(12), 589-608.

Molur S, Srinivasulu CB, Walker S, Nameer Ravikumar L. 2005. Status of south Asian non-volant small mammals. Conservation and Management Plan Workshop Report. Zoo Outreach Organization/CBSG-South Asia, Coimbatore, India, 618.

Ofori BY, Attuquayefio DK, Gbogbo F. 2013. Terrestrial small mammal community structure in an anthropogenically-altered moist semi-deciduous forest zone of Ghana. International Journal of Development and Sustainability 2(2), 1156-1168.

Ofori BY, Attuquayefio DK, Gbogbo F. 2015. Status and challenges for conservation of small mammal assemblages of Ghana. Journal of Biodiversity and Environmental Science 6(4), pp. 374-384.

Ofori BY, Attuquayefio DK, Owusu EH, Musah RKY, Quartey JK, Baidu YN. 2015. Seasonal changes in small mammals assemblage in Kogyae Strict Nature Reserve, Ghana. International Journal of Biodiversity and Conservation 7(4), pp. 238-244.

Pearson DE, Ruggiero LF. 2003. Transect versus grid trapping arrangements for sampling small-mammal communities. Wildlife Society Bulletin 31(2), 454-459.

Poel PVD. 2013. Results of 2012 rapid biodiversity survey in Bumdeling Wildlife Sanctuary. Department of Forest and Park Services, Thimphu, Bhutan.

Shrestha TK. 1997. Mammals of Nepal: with Reference to those of India, Bangladesh, Bhutan and Pakistan. Steven Simpson Natural History Book, Hingham, United Kingdom.

Sieg CH. 1987. Small mammals: Pests or vital components of the ecosystem. Lincoln, South Dakota, USA 4, 88-91.

Tuyisingize D, Peterhans JC, Bronner GN. 2014. Terrestrial small mammal community composition in the Volcanoes National Park, Rwanda. Boon Zoological Bulletin 2(62), 177-185.

UNESCO. 2012. Bumdeling Wildlife Sanctuary. Bhutan National Commisson, Royal Government of Bhutan.Thimphu, Bhutan.

Walker TS. 2003. Think Rat! Report on training in field techniques and taxonomy for conservation of rodents and servations. RISCINSA and Zoo Outreach Organization. Coimbatore, India.

Wangchuk T, Thinley P, Tshering K, Tshering C, Yonten D, Pema B. 2004. A field guide to the ammals of Bhutan. Department of Forest and Park Services, Thimphu, Bhutan 141-156.

Wangmo S, Wangdi Y, Wangchuk D. 2014. Report on estimating small mammal abundance in Royal Manas National Park. Research Information and Management Planning Section, Royal Manas National Park, Bhutan.

Wolff JO, Sherman PW. 2007. Rodent Societies: An Ecological evolutionary perspective. The University of Chicago Press, Chicago, 610.