Show simple item record

dc.contributor.author Bennitt, Emily
dc.contributor.author Bartlam-Brooks, Hattie L.A.
dc.contributor.author Hubel, Tatjana Y.
dc.contributor.author Wilson, Alan M.
dc.coverage.spatial Botswana
dc.coverage.temporal Holocene
dc.date.accessioned 2019-03-14T20:53:26Z
dc.date.available 2019-03-14T20:53:26Z
dc.date.issued 2019-03-12
dc.identifier doi:10.5061/dryad.0582b8b
dc.identifier.citation Bennitt E, Hubel TY, Bartlam-Brooks HLA, Wilson AM (2019) Possible causes of divergent population trends in sympatric African herbivores. PLOS ONE 14(3): e0213720.
dc.identifier.uri http://hdl.handle.net/10255/dryad.198278
dc.description Sympatric herbivores experience similar environmental conditions but can vary in their population trends. Identifying factors causing these differences could assist conservation efforts aimed at maintaining fully functional ecosystems. From 1996 – 2013, tsessebe and wildebeest populations in the Okavango Delta, Botswana, declined by 73% and 90%, respectively, whereas zebra populations remained stable. These sympatric, medium sized herbivores are exposed to similar natural and anthropogenic pressures, but apparently differ in their responses to those pressures. To identify factors that could cause these differences, we fitted GPS-enabled collars to six zebra, eight tsessebe and seven wildebeest in the Moremi Game Reserve, Botswana. We calculated utilisation distributions (UDs) from GPS data, and used 95% isopleths to compare seasonal home range size between species. We calculated utilisation intensity (UI) from the UDs and generated spatial layers representing resources and disturbances, and then used model averaging to identify factors affecting UI for each species. We calculated second and third order habitat selection ratios to determine whether species were habitat specialists or generalists. Zebra occupied larger home ranges than tsessebe and wildebeest, showed weaker responses to spatial variables and displayed no third order habitat selection; zebra social systems are also more fluid, allowing for information exchange between stable harems. Herbivore species that are sedentary, occupy small home ranges, are habitat specialists and exist in relatively isolated groups are likely to be less resistant and resilient to the rapid pace of environmental change forecast by climate change scenarios. Resources contained within existing protected areas are unlikely to maintain populations of such species at sufficiently high levels, potentially leading to functional extinction. Special precautions may be needed to ensure that such species can persist in the wild, such as buffer zones around existing protected areas, which would allow greater potential for adaptive movement should current environmental conditions change.
dc.relation.haspart doi:10.5061/dryad.0582b8b/1
dc.relation.isreferencedby doi:10.1371/journal.pone.0213720
dc.subject Adaptive movement
dc.subject environmental change
dc.subject population persistence
dc.title Data from: Possible causes of divergent population trends in sympatric African herbivores
dc.type Article
dwc.ScientificName Equus quagga
dwc.ScientificName Connochaetes taurinus
dwc.ScientificName Damaliscus lunatus
dc.contributor.correspondingAuthor Emily Bennitt
prism.publicationName PLOS ONE

Files in this package

Content in the Dryad Digital Repository is offered "as is." By downloading files, you agree to the Dryad Terms of Service. To the extent possible under law, the authors have waived all copyright and related or neighboring rights to this data. CC0 (opens a new window) Open Data (opens a new window)

Title Population trends data
Downloaded 3 times
Description Data on home range size, habitat selection and factors affecting spatial distribution of zebra, tsessebe and blue wildebeest in the Okavango Delta
Download Population trends data.xlsx (59.46 Mb)
Details View File Details

Search for data

Be part of Dryad

We encourage organizations to: