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ORGANIC FARMS AS REFUGES FOR SMALL MAMMAL BIODIVERSITY

Jensen, Thomas Secher; Hansen, Tine Sussi and Olsen, Kent (2009) ORGANIC FARMS AS REFUGES FOR SMALL MAMMAL BIODIVERSITY. Poster at: The 10th International Mammalogical Congress, Mendosa, Argentina, 9-14 of August 2009.

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Summary

Habitat fragmentation, the process by which relatively continuous habitats is broken into smaller pieces, occurs in natural systems but is to a high degree also human-
induced through landscape use. Fragmentation of the landscape produces a series of habitat patches surrounded by a matrix of different habitats and/or land use regimes. The major landscape consequences of fragmentation are loss of habitat, reduction in habitat patch size, and increasing isolation of habitat patches. In general, population performance declines in response to habitat loss but size of remaining area and isolation effects is known also to influence the population trend. Small mammals are well suited for examination of population responses to habitat fragmentation as they have modest spatial requirements and short generation times. In theory, organic farms could play an important role in the agricultural landscape as refuges for some small mammal species, as the lack of pesticide and fertiliser treatment, less weed control, more diversified crop structure and a general environmentalfriendly attitude, form a basis for habitats that provide cover and food for small mammals, and thus for larger predators of these species. Furthermore, density and area of small biotopes could be expected to be higher in the organic farms, thus leading to a decreased distance between optimal habitats.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Subjects:"Organics" in general
Research affiliation: Denmark > DARCOF III (2005-2010) > REFUGIA - The role of Organic Farms as refugia for biodiversity
Deposited By: , dR lwa
ID Code:16306
Deposited On:29 Sep 2009 13:47
Last Modified:12 Apr 2010 07:40
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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