Artificial wetlands and surrounding habitats provide important foraging habitat for bats in agricultural landscapes in the Western Cape, South Africa

Sirami, Clélia, Jacobs, David Steve, and Cumming, Graeme S. (2013) Artificial wetlands and surrounding habitats provide important foraging habitat for bats in agricultural landscapes in the Western Cape, South Africa. Biological Conservation, 164. pp. 30-38.

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Abstract

Agriculture and related habitat modification have been identified as globally important drivers of species loss. Habitat modification resulting from agriculture can, however, have both positive and negative consequences for animal species. The ecological trade-offs involved in agricultural development have often not been explored sufficiently well to identify mutually beneficial solutions. Bats, for example, have been strongly impacted by agriculture intensification, mainly through the destruction of forests and natural wetlands. However, artificial wetlands created primarily for irrigation in agricultural landscapes may provide foraging habitats for bats and thus contribute to both the conservation of bat species and the regulation of insect pest species. We studied the influence of artificial wetlands on bat communities in agricultural landscapes in South Africa. We used mixed models to assess spatial variations in species richness, total bat activity, and species activity across 30 landscapes. Each study site was centred on a 'focal wetland' and surrounded by various habitat categories: open habitat, vineyards, orchards and trees. Our results show a crucial role of wetlands for all bat species as well as a significant influence of wetland size and water cover on bat activity. However, we observed no significant difference in species richness and only small differences in activity levels between the 'focal wetland' and the surrounding habitats. The present study contributes to the body of literature suggesting that farm dams may act as biodiversity hotspots when properly managed. More generally, our analysis suggests that an in-depth understanding of the trade-offs between agricultural production and ecosystem integrity is important for finding mutually beneficial outcomes.

Item ID: 40950
Item Type: Article (Research - C1)
ISSN: 1873-2917
Keywords: bat communities, Chiroptera, crops, farm dam, impoundment, land cover, orchards, pest regulation
Funders: DST/NRF Centre of Excellence at the Percy FitzPatrick Institute
Date Deposited: 26 Nov 2015 02:57
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050104 Landscape Ecology @ 33%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 33%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060204 Freshwater Ecology @ 34%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960501 Ecosystem Assessment and Management at Regional or Larger Scales @ 50%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 50%
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