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Diversity and distribution patterns of non-volant smallmammals along different elevation gradients on Mt. Kenya,Kenya

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Zoological Research 2019年第1期40卷 53-60页

作者： Simon Musila Zhong-Zheng Chen Quan Li Richard Yego Bin Zhang Kenneth Onditi Immaculate Muthoni Shui-Wang He Samson Omondi james mathenge Esther N.Kioko Xue-Long Jiang Mammalogy Section Department of Zoology National Museums of Kenya Kunming Institute of Zoology Chinese Academy of Sciences Anhui Province Key Laboratory for Conservation and Exploitation of Biological Resource College of Life Science Anhui Normal University Sino-Africa Joint Research Center Chinese Academy of Sciences Kenya Wildlife Service Mweiga Research Station

The distribution of small mammals in mountainous environments across different elevations can provide important information on the effects of climate change on the dispersal of species. However, few studies conducted on Afromontane ecosystems have compared the altitudinal patterns of small mammal diversity. We investigated the species diversity and abundance of non-volant small mammals(hereafter ‘small mammals')on Mt. Kenya, the second tallest mountain in Africa,using a standard sampling scheme. Nine sampling transects were established at intervals of 200 m on the eastern(Chogoria) and western(Sirimon) slopes.A total of 1 905 individuals representing 25 species of small mammals were trapped after 12 240 trap-nights.Abundance was highest at mid-elevations on both slopes.However, species richness and their distribution patterns differed between the two slopes. More species were recorded on Chogoria(24) than on Sirimon(17). On Chogoria, species richness was higher at mid-high elevations, with a peak at mid-elevation(2 800 m a.s.l.),whereas species richness showed little variation on the Sirimon slope. These results indicate that patterns of species diversity can differ between slopes on the same mountain. In addition, we extensively reviewed literature on Mt. Kenya's mammals and compiled a comprehensive checklist of 76 mammalian species. However, additional research is required to improve our understanding of smal mammal diversity in mountain habitats in Africa.

关键词： Small mammals Species richness Abundance Elevation Mt.Kenya

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Untangling key predictors of terrestrial mammal diversity patterns in Kenya: implications for protected areas management

Untangling key predictors of terrestrial mammal diversity pa...

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第十六届全国野生动物生态与资源保护学术研讨会

作者： Kenneth Otieno Onditi Xueyou Li Wenyu Song Quan Li Simon Musila james mathenge Esther Kioko Xuelong Jiang State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of Sciences Kunming College of Life Sciences University of Chinese Academy of Sciences Department of Zoology National Museums of Kenya Sino-Africa Joint Research Centre Chinese Academy of Sciences

The global proliferation of protected areas(PAs) is an enduring means of combating biodiversity declines and was a commendable tool towards achieving Aichi Biodiversity Target 11. Even so, the effectiveness of PAs in conserving biodiversity remains debated due to continued species declines and ecosystem degradations within them. It is increasingly recognized that merely designating new and expanding existing PAs does not guarantee the protection of critical ecosystems and species. Instead, their management must be effective for meaningful long-term conservational success and viability, integral to the success of the historic Kunming-Montreal Global Biodiversity Framework goals and targets. Evaluating the effectiveness of biodiversity management tools such as PAs requires a good understanding of how institutional(such as PA governances and designations) and noninstitutional(such as abiotic [environmental and anthropogenic] factors) variables affect species diversity and distribution patterns and ecological-evolutionary opportunities, especially in biodiversity-rich countries such as Kenya. In this study, we coupled data on Kenya's terrestrial mammal occurrences, phylogenetic associations, functional traits, and abiotic factors to derive multiple taxonomic, functional, and phylogenetic diversity indices. We then inferred PAs' management effectiveness based on the diversity and distribution patterns, their association with governance and designation types, and with several abiotic factors using multivariate statistics and regression analysis. We found that nearly all terrestrial mammals in Kenya were represented in at least one PA(≈ 98%), although the range proportion overlapping in PAs was low. Spatial conservation prioritization analysis showed that a best-solution reserve system required significant expansion of current PAs to achieve a one-third coverage of focal species ranges. Among the diversity indices, species richness was weakly associated with the phylogenetic and functional diversity indices. The abiotic

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