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Long-term monitoring of landbirds on Aldabra Atoll indicates increasing population trends

Long-term monitoring of landbirds on Aldabra Atoll indicates increasing population trends Summary Long-term survey data can provide important information on temporal and spatial changes in bird populations and are needed for conservation management. We investigate population indices of seven landbird species using an 11-year dataset from the UNESCO World Heritage Site of Aldabra Atoll. We analysed the associations of location, season and habitat with abundance, assessed population trends, and examined the influence of monitoring circumstances on results. Populations of all species except for the Aldabra Drongo Dicrurus aldabranus increased over this period. Abundance was associated with season and habitat, and interactions were found between season and location that differed for each species. Bird count results were affected by the timing of monitoring, number of observers and weather conditions. We use the results to review the strengths and weaknesses of the current monitoring programme and make recommendations for improvements. Overall our results indicate no immediate cause for conservation concern for the Aldabra landbird species monitored. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bird Conservation International Cambridge University Press

Long-term monitoring of landbirds on Aldabra Atoll indicates increasing population trends

Bird Conservation International , Volume 26 (3): 13 – Oct 27, 2015
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Publisher
Cambridge University Press
Copyright
Copyright © BirdLife International 2015 
ISSN
1474-0001
eISSN
0959-2709
DOI
10.1017/S0959270915000143
Publisher site
See Article on Publisher Site

Abstract

Summary Long-term survey data can provide important information on temporal and spatial changes in bird populations and are needed for conservation management. We investigate population indices of seven landbird species using an 11-year dataset from the UNESCO World Heritage Site of Aldabra Atoll. We analysed the associations of location, season and habitat with abundance, assessed population trends, and examined the influence of monitoring circumstances on results. Populations of all species except for the Aldabra Drongo Dicrurus aldabranus increased over this period. Abundance was associated with season and habitat, and interactions were found between season and location that differed for each species. Bird count results were affected by the timing of monitoring, number of observers and weather conditions. We use the results to review the strengths and weaknesses of the current monitoring programme and make recommendations for improvements. Overall our results indicate no immediate cause for conservation concern for the Aldabra landbird species monitored.

Journal

Bird Conservation International – Cambridge University Press

Published: Oct 27, 2015

References

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