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Europe-Wide Dampening of Population Cycles in Keystone Herbivores

Thomas CornulierSchool of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UKNigel G. YoccozDepartment of Arctic and Marine Biology, University of Tromsø, N-9037 Tromsø, NorwayVincent BretagnolleCentre d’Etudes Biologiques de Chizé, CNRS, UPR 1934, Beauvoir sur Niort, 79360, FranceJon E. BrommerDepartment of Biosciences, Post Office Box 65 (Viikinkaari 1), University of Helsinki, FI–00014 Helsinki, FinlandAlain ButetEcosystèmes, Biodiversité, EvolutionFrauke EckeDepartment of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Post Office Box 7050, 75007 Uppsala, SwedenDavid A. ElstonBiomathematics and Statistics Scotland, Craigiebuckler, Aberdeen AB15 8QH, UKErik FramstadNorwegian Institute for Nature Research, Gaustadalleen 21, 0349 Oslo, NorwayHeikki HenttonenFinnish Forest Research Institute, Vantaa Unit, Post Office Box 18, FI-01301 Vantaa, FinlandBirger HörnfeldtDepartment of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 90183 Umeå, SwedenOtso HuituFinnish Forest Research Institute, Suonenjoki Unit, Juntintie 154, FI-77600 Suonenjoki, FinlandChristian ImholtJulius Kühn-Institute, Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and Forests, Toppheideweg 88, 48161 Münster, GermanyRolf A. ImsDepartment of Arctic and Marine Biology, University of Tromsø, N-9037 Tromsø, NorwayJens JacobJulius Kühn-Institute, Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and Forests, Toppheideweg 88, 48161 Münster, GermanyBogumiła JędrzejewskaMammal Research Institute, Polish Academy of Sciences, 17-230 Białowieża, PolandAlexandre MillonSchool of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UKSteve J. PettyCentre for Human and Ecological Sciences, Forest Research, Northern Research Station, Roslin, Midlothian EH25 9SY, UKHannu PietiäinenDepartment of Biosciences, Post Office Box 65 (Viikinkaari 1), University of Helsinki, FI–00014 Helsinki, FinlandEmil TkadlecInstitute of Vertebrate Biology, Academy of Sciences of the Czech Republic, 675 02 Studenec 122, Czech RepublicKarol ZubMammal Research Institute, Polish Academy of Sciences, 17-230 Białowieża, PolandXavier LambinSchool of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UK

2013en

ABI

Annotatsiya

Suggestions of collapse in small herbivore cycles since the 1980s have raised concerns about the loss of essential ecosystem functions. Whether such phenomena are general and result from extrinsic environmental changes or from intrinsic process stochasticity is currently unknown. Using a large compilation of time series of vole abundances, we demonstrate consistent cycle amplitude dampening associated with a reduction in winter population growth, although regulatory processes responsible for cyclicity have not been lost. The underlying syndrome of change throughout Europe and grass-eating vole species suggests a common climatic driver. Increasing intervals of low-amplitude small herbivore population fluctuations are expected in the future, and these may have cascading impacts on trophic webs across ecosystems.

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DOI: 10.1126/science.1228992

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