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Species diversity of bats along an altitudinal gradient on Mount Mulanje, southern Malawi

  • Michael Curran (a1) (a2), Mirjam Kopp (a1), Jan Beck (a1) and Jakob Fahr (a3) (a4)


A climate model, based on effects of water availability and temperature, was recently proposed to explain global variation in bat species richness along altitudinal gradients. Yet such studies are sparse in the tropics and near-absent in Africa. Here we present results from an altitudinal study of bat diversity from Mount Mulanje, Malawi. Using ground nets, canopy nets and harp traps, we sampled eight sites across three habitat zones from 630 m to 2010 m asl. We assessed the influence of climatic, geographic and biotic variables on measures of estimated species richness, Fisher's α, and an unbiased index of compositional turnover. We recorded 723 individuals and 30 species along the gradient, revealing a ‘low plateau’ pattern in estimated species richness, peaking at 1220 m, which is congruent with the global climate model. Measures of local habitat structure significantly explained a large degree of variation in species richness and compositional turnover between sites. Fisher's α was further significantly correlated to mean annual relative humidity, suggesting a background climatic influence.


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BAYLISS, J., MAKUNGWA, S., HECHT, J., NANGOMA, D. & BRUESSOW, C. 2007. Saving the Island in the Sky: the plight of the Mount Mulanje cedar Widdringtonia whytei in Malawi. Oryx 41:6469.
BECK, J., ALTERMATT, F., HAGMANN, R. & LANG, S. 2010. Seasonality in the altitude-diversity pattern of alpine moths. Basic and Applied Ecology 11:714722.
BECK, J. & SCHWANGHART, W. 2010. Comparing measures of species diversity from incomplete inventories: an update. Methods in Ecology and Evolution 1:3844.
BECK, J., BREHM, G. & FIEDLER, K. 2011. Links between the environment, abundance and diversity of Andean moths. Biotropica 43:208217.
BERGMANS, W. 1997. Taxonomy and biogeography of African fruit bats (Mammalia, Megachiroptera). 5. The genera Lissonycteris Andersen, 1912, Myonycteris Matschie, 1899 and Megaloglossus Pagenstecher, 1885; general remarks and conclusions; annex: key to all species. Beaufortia 47:1190.
BOUVIER, I. 2006. Mount Mulanje land cover time series analysis. Report to the Community Partnerships for Sustainable Resource Management in Malawi (COMPASS II), Blantyre, Malawi.
BROSE, U. & MARTINEZ, N. D. 2004. Estimating the richness of species with variable mobility. Oikos 105:292300.
CHAO, A. & SHEN, T. J. 2003. Nonparametric estimation of Shannon's index of diversity when there are unseen species in sample. Environmental and Ecological Statistics 10:429443.
CHAPMAN, J. D. 1962. The vegetation of the Mlanje Mountains, Nyasaland. Government Printer Zomba, Nyasaland. 78 pp.
COCKLE, A., KOCK, D., STUBLEFIELD, L., HOWELL, K. & BURGESS, N. 1998. Bat assemblages in Tanzanian coastal forests. Mammalia 62:5368.
COLWELL, R. K. & LEES, D. C. 2000. The mid-domain effect: geometric constraints on the geography of species richness. Trends in Ecology and Evolution 15:7076.
DOWSETT-LEMAIRE, F. 1988. The forest vegetation of Mount Mulanje (Malawi): A floristic and chorological study along an altitudinal gradient (650–1950 m). Bulletin du Jardin Botanique National de Belgique 58:77107.
FAHR, J. & KALKO, E. K. V. 2011. Biome transitions as centres of diversity: habitat heterogeneity and diversity patterns of West African bat assemblages across spatial scales. Ecography 34:177195.
FINDLEY, J. S. & WILSON, D. E. 1983. Are bats rare in tropical Africa? Biotropica 15:299303.
FISHER, R. A., CORBET, A. S. & WILLIAMS, C. B. 1943. The relation between the number of species and the number of indivuduals in a random sample of an animal population. Journal of Animal Ecology 12:4258.
GOODMAN, S. M. & RASOLONANDRASANA, B. P. N. 2001. Elevational zonation of birds, insectivores, rodents and primates on the slopes of the Andringitra Massif, Madagascar. Journal of Natural History 35:285305.
GOTELLI, N. J. & COLWELL, R. K. 2001. Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness. Ecology Letters 4:379391.
GRAHAM, G. L. 1990. Bats versus birds: comparisons among Peruvian volant vertebrate faunas along an elevational gradient. Journal of Biogeography 17:657668.
GRYTNES, J.-A. & MCCAIN, C. M. 2007. Elevational trends in biodiversity. Pp. 18 in Levin, S. A. (ed.). Encyclopedia of biodiversity. Elsevier, New York.
HAPPOLD, D. C. D., HAPPOLD, M. & HILL, J. E. 1987. The bats of Malawi. Mammalia 51:337414.
HAPPOLD, M. & HAPPOLD, D. C. D. 1997. New records of bats (Chiroptera: Mammalia) from Malawi, east-central Africa, with an assessment of their status and conservation. Journal of Natural History 31:805836.
HAWKINS, B. A., DINIZ-FILHO, J. A. F. & WEIS, A. E. 2005. The mid-domain effect and diversity gradients: is there anything to learn? American Naturalist 166:E140E143.
HAYMAN, R. W. & HILL, J. E. 1971. Order Chiroptera. Pp. 173 in Meester, J. & Setzer, H. W. (eds.). The mammals of Africa. An identification manual. Smithsonian Institution Press, Washington, DC.
HURLBERT, S. H. 1971. The nonconcept of species diversity: a critique and alternative parameters. Ecology 52:577586.
JOST, L. 2006. Entropy and diversity. Oikos 113:363375.
KOCK, D., CSORBA, G. & HOWELL, K. M. 2000. Rhinolophus maendeleo n. sp. from Tanzania, a horseshoe bat noteworthy for its systematics and biogeography. Senckenbergiana Biologica 80:233239.
KUNZ, T. H., HODGKISON, R. & WEISE, C. D. 2009. Methods of capturing and handling bats. Pp 335 in Kunz, T. H. & Parsons, S. (eds.). Ecological and behavioral methods for the study of bats. (Second edition). John Hopkins University Press, Baltimore. 901 pp.
LEGENDRE, P., BORCARD, D. & PERES-NETO, P. R. 2005. Analyzing beta diversity: partitioning the spatial variation of community composition data. Ecological Monographs 75:435450.
MCCAIN, C. M. 2007a. Area and mammalian elevational diversity. Ecology 88:7686.
MCCAIN, C. M. 2007b. Could temperature and water availability drive elevational richness patterns? A global case study for bats. Global Ecology and Biogeography 16:113.
MEGGERS, B. J., AYENSU, E. S. & DUCKWORTH, W. D. (eds.). 1973. Tropical forest ecosystems in Africa and South America: a comparative review. Smithsonian Institute Press, Washington, DC. 350 pp.
MILLER-BUTTERWORTH, C. M., EICK, G., JACOBS, D. S., SCHOEMAN, M. C. & HARLEY, E. H. 2005. Genetic and phenotypic differences between South African long-fingered bats, with a global miniopterine phylogeny. Journal of Mammalogy 86:11211135.
MONADJEM, A., SCHOEMAN, M. C., RESIDE, A., PIO, D. V., STOFFBERG, S., BAYLISS, J., COTTERILL, F. P. D., CURRAN, M., KOPP, M. & TAYLOR, P. J. 2010. A recent inventory of the bats of Mozambique with documentation of seven new species for the country. Acta Chiropterologica 12:371391.
RACEY, P. A. & ENTWISTLE, A. C. 2003. Conservation ecology of bats. Pp. 680743 in Kunz, T. H. & Fenton, M. B. (eds.). Bat ecology. University of Chicago Press, Chicago.
RAHBEK, C. 2005. The role of spatial scale and the perception of large-scale species-richness patterns. Ecology Letters 8:224239.
RANGEL, T. F., DINIZ FILHO, J. A. F. & BINI, L. M. 2010. SAM: a comprehensive application for Spatial Analysis in Macroecology. Ecography 33:4650.
ROMDAL, T. S. & GRYTNES, J. A. 2007. An indirect area effect on elevational species richness patterns. Ecography 30:440448.
SÁNCHEZ-CORDERO, V. 2001. Elevational gradients of diversity for rodents and bats in Oaxaca, Mexico. Global Ecology and Biogeography Letters 10:6376.
SANDERS, N. J. 2002. Elevational gradients in ant species richness: area, geometry, and Rapoport's rule. Ecography 25:2532.
SANDERS, N. J., LESSARD, J., FITZPATRICK, M. C. & DUNN, R. R. 2007. Temperature, but not productivity or geometry, predicts elevational diversity gradients in ants across spatial grains. Global Ecology and Biogeography 16:640649.
SCHNITZLER, H. U. & KALKO, E. V. 2001. Echolocation by insect-eating bats. BioScience 51:557569.
SIMMONS, N. B. 2005. Order Chiroptera. Pp. 312529 in Wilson, D. E. & Reeder, D. M. (eds.). Mammal species of the world: a taxonomic and geographic reference. Vol. 1 (Third edition). John Hopkins University Press, Baltimore. 743 pp.
SMITH, S. A., NIETO MONTES DE OCA, A., REEDER, T. W. & WIENS, J. J. 2007. A phylogenetic perspective on elevational species richness patterns in middle American treefrogs: why so few species in lowland tropical rainforests? Evolution 61:11881207.
TERBORGH, J. 1977. Bird species diversity on an Andean elevational gradient. Ecology 58:10071019.
TRUEBLOOD, D. D., GALLAGHER, E. D. & GOULD, D. M. 1994. Three stages of seasonal succession on the Savin Hill Cove mudflat, Boston Harbor. Limnology and Oceanography 39:14401454.
WALTHER, B. A. & MOORE, J. L. 2005. The concepts of bias, precision and accuracy, and their use in testing the performance of species richness estimators, with a literature review of estimator performance. Ecography 28:815829.
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