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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Long-term monitoring of tropical bats for anthropogenic impact assessment: Gauging the statistical power to detect population change
Biological Conservation, Volume 143, No. 11, Year 2010
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Description
Bats are ecologically important mammals in tropical ecosystems; however, their populations face numerous environmental threats related to climate change, habitat loss, fragmentation, hunting, and emerging diseases. Thus, there is a pressing need to develop and implement large-scale networks to monitor trends in bat populations over extended time periods. Using data from a range of Neotropical and Paleotropical bat assemblages, we assessed the ability for long-term monitoring programs to reliably detect temporal trends in species abundance. We explored the magnitude of within-site temporal variation in abundance and evaluated the statistical power of a suite of different sampling designs for several different bat species and ensembles. Despite pronounced temporal variation in abundance of most tropical bat species, power simulations suggest that long-term monitoring programs (≥20. years) can detect population trends of 5% per year or more with adequate statistical power (≥0.9). However, shorter monitoring programs (≤10. years) have insufficient power for trend detection. Overall, our analyses demonstrate that a monitoring program extending over 20. years with four surveys conducted biennially on five plots per monitoring site would have the potential for detecting a 5% annual change in abundance for a suite of bat species from different ensembles. The likelihood of reaching adequate statistical power was sensitive to initial species abundance and the magnitude of count variation, stressing that only the most abundant species in an assemblage and those with generally low variation in abundance should be considered for detailed population monitoring. © 2010 Elsevier Ltd.
Authors & Co-Authors
Meyer, Christoph F.J.
Germany, Ulm
Universität Ulm
Aguiar, Ludmilla M.S.
Brazil, Brasilia
Universidade de Brasília
Aguirre, Luis F.
Bolivia, Cochabamba
Universidad Mayor de San Simón
Bolivia, La Paz
Centro de Estudios en Biología Teórica y Aplicada
Baumgarten, Julio
Brazil, Ilheus
Universidade Estadual de Santa Cruz
Clarke, Frank M.
United Kingdom, Aberdeen
University of Aberdeen
Cosson, Jean François
France, Montferrier-sur-lez
Centre de Biologie Pour la Gestion Des Populations Cbgp
Villegas, Sergio Estrada
Canada, Montreal
Université Mcgill
Fahr, Jakob
Germany, Ulm
Universität Ulm
Faria, Deborah Maria
Brazil, Ilheus
Universidade Estadual de Santa Cruz
Furey, Neil
United Kingdom, Aberdeen
University of Aberdeen
Henry, Mickaël
France, Brignais
Abeilles et Environnement ae
Hodgkison, Robert
Germany, Ulm
Universität Ulm
Jenkins, Richard K.B.
United Kingdom, Aberdeen
University of Aberdeen
Madagascar, Antananarivo
Madagasikara Voakajy
Jung, Kirsten G.
Germany, Ulm
Universität Ulm
Kingston, Tigga
United States, Lubbock
Texas Tech University
Kunz, Thomas H.
United States, Boston
Boston University
MacSwiney Gonzalez, M. Cristina
United Kingdom, Aberdeen
University of Aberdeen
Mexico, Xalapa
Universidad Veracruzana
Moya, Isabel
Bolivia, La Paz
Centro de Estudios en Biología Teórica y Aplicada
Pons, Jean Marc
France, Paris
Museum National D'histoire Naturelle
Racey, Paul A.
United Kingdom, Exeter
University of Exeter
Rex, Katja
Germany, Berlin
Leibniz-institut Für Zoo- Und Wildtierforschung
Sampaio, Erica M.
Germany, Ulm
Universität Ulm
Stoner, Kathryn Elizabeth
Mexico, Morelia
Instituto de Investigaciones en Ecosistemas y Sustentabilidad
Voigt, Christian Claus
Germany, Berlin
Leibniz-institut Für Zoo- Und Wildtierforschung
Staden, Dietrich von
Germany, Ulm
Universität Ulm
Weise, Christa D.
United States, Austin
Bat Conservation International
Kalko, Elisabeth Klara Viktoria
Germany, Ulm
Universität Ulm
United States, Washington, D.c.
Smithsonian Tropical Research Institute
Statistics
Citations: 74
Authors: 27
Affiliations: 19
Identifiers
Doi:
10.1016/j.biocon.2010.07.029
ISSN:
00063207
Research Areas
Environmental
Study Design
Cross Sectional Study