Shifts from native to invasive small mammals across gradients from tropical forest to urban habitat in Borneo
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Urbanization has paved the way for the spread of commensal rodents at global scale. However, it is largely unknown how these species use tropical anthropogenic landscapes originally covered with forests and inhabited by diverse small mammal assemblages. We surveyed non-flying small mammals in various urban and suburban habitat types and adjacent forest in the tropical town of Kota Kinabalu in Borneo. We used occupancy and polynomial regression models to determine variation in species occurrences along gradients of land-use intensity. Müller’s sundamys (Sundamys muelleri) was the only native small mammal species found in urban and suburban landscapes with a continuous decrease in occurrence probability from forests to urban habitats. The invasive Asian black rat (Rattus rattus species complex) and the invasive Asian house shrew (Suncus murinus) had the highest occurrence probabilities in habitats of intermediate land-use intensity, but Asian black rats are also likely to occasionally invade forested habitats and occupied urban habitats in sympatry with the Norway rat (Rattus norvegicus). In urban and suburban habitats, fallow land possibly favoured the occurrence of S. muelleri and S. murinus. Other native small mammal species (Muridae, Sciuridae, Tupaiidae) were found only in forested areas. Our study shows that native small mammals found in forest are largely replaced by invasive species in urban and suburban habitats. Due to their occurrence in habitats of various land use intensities, S. muelleri and R. rattus comprise central links between forest wildlife and urban species, an association that is important to consider in studies of parasite and disease transmission dynamics.
KeywordsCo-occurrence Anthropogenic landscape Species invasion Occupancy model Polynomial regression Urbanization
We are grateful to the Sabah Biodiversity Council (Majlis Biodiversity Sabah) for research permits JKM-MBS.1000-2/2(35), JKM-MBS.1000-2/2(63). We extend our gratitude to all citizens in Sabah who provided access to their properties or were in other ways helpful during field work. We thank Jorimia Molubi, Brigitte Fiala and K. Eduard Linsenmair for logistic support. We also thank Eva Gerstner and Fred Tuh Y. Yuh and the Sabah Parks research department team for technical and logistic support. Kristina Cockle, Christoph F. J. Meyer and anonymous reviewers provided helpful comments on the manuscript. The Centre of Scientific Computing (CSC) of the Goethe University in Frankfurt provided computation facilities, R.B.O. was supported by the „Landesoffensive zur Entwicklung wissenschaftlich-ökonomischer Exzellenz“ programme (Hesse, Germany).
- Aplin KP, Brown PR, Jacob J, Krebs CJ, Singleton GR (2003) Field methods for rodent studies in Asia and the Indo-Pacific. ACIAR Monogr 100:223Google Scholar
- Banerjee S, Carlin BP, Gelfand AE (2004) Hierarchical modeling and analysis for spatial data. Chapman & Hall/CRC, Boca RatonGoogle Scholar
- Carlin B, Chib S (1995) Bayesian model choice via Markov chain Monte Carlo methods. J R Stat Soc B 57:473–484Google Scholar
- JRC FAO (2012) Global forest land-use change 1990–2005. In: Lindquist EJ et al (eds) FAO Forestry Paper No. 169. Food and Agriculture Organization of the United Nations and European Commission Joint Research Centre. Rome, FAO Google Scholar
- Gelman A, Carlin JB, Stern HS, Rubin DB (2005) Bayesian data analysis, 2nd edn. Chapman & Hall/CRC, Boca RatonGoogle Scholar
- Herbreteau V, Bordes F, Jittapalapong S, Supputamongkol Y, Morand S (2012) Rodent-borne diseases in Thailand: targeting rodent carriers and risky habitats. Infect Ecol Epidemiol 2:18637Google Scholar
- MacKenzie DI, Nichols JD, Royle JA, Pollock KH, Bailey LL, Hines JE (2006) Occupancy estimation and modeling: inferring patterns and dynamics of species occurrence. Elsevier, AmsterdamGoogle Scholar
- Mazerolle MJ, Villard MA (1999) Patch characteristics and landscape context as predictors of species presence and abundance: a review. Ecoscience 6:117–124Google Scholar
- Musser G, Carleton M (2005) Superfamily Muroidea. In: Wilson DE, Reeder DM (eds) Mammal species of the world: a taxonomic and geographic reference, vol 2, 3rd edn. Johns Hopkins University, Baltimore, pp 894–1531Google Scholar
- Wells K, Kock D, Lakim MB, Pfeiffer M (2006) Is Rattus rattus invading the primary rainforest on Borneo? Malay Nat J 59:73–79Google Scholar