Livestock grazing is a major driver of land-use change, causing significant biodiversity loss globally. Although the short-term effects of livestock grazing on individual species are well studied, a mechanistic understanding of the long-term, cascading impacts is lacking. We manipulated livestock densities using a unique, replicated upland experiment over a 10-year period and found significant effects of grazing treatment on plant and arthropod biomass; the number of Anthus pratensis breeding bird territories; the amplitude of Microtus agrestis population cycles and the activity of a top predator, Vulpes vulpes. Lower plant biomass as a result of higher stocking densities led to cascades across trophic levels, with fewer arthropods and small mammals, the latter affecting predator activity. Breeding bird territories were a function of arthropod abundance and vegetation structure heterogeneity. Our results provide a novel food-web analysis in a grazing experiment to provide a mechanistic understanding of ho...
The cascading impacts of livestock grazing in upland ecosystems : a 10-year experiment
D. Evans,Nacho Villar,N. Littlewood,R. Pakeman,S. Evans,P. Dennis,J. Skartveit,S. Redpath
Published 2015 in Ecosphere
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- Publication year
2015
- Venue
Ecosphere
- Publication date
2015-03-01
- Fields of study
Biology, Environmental Science
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Semantic Scholar
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