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Demographic routes to variability and regulation in bird populations

Saether, Bernt-Erik (author)
Norwegian Univ Sci & Technol, Ctr Biodivers Dynam, Dept Biol, NO-7491 Trondheim, Norway.
Grotan, Vidar (author)
Norwegian Univ Sci & Technol, Ctr Biodivers Dynam, Dept Biol, NO-7491 Trondheim, Norway.
Engen, Steinar (author)
Norwegian Univ Sci & Technol, Ctr Biodivers Dynam, Dept Math Sci, NO-7491 Trondheim, Norway.
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Coulson, Tim (author)
Univ Oxford, Dept Zool, South Parks Rd, Oxford OX1 3PS, England.
Grant, Peter R. (author)
Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA.
Visser, Marcel E. (author)
Netherlands Inst Ecol NIOO KNAW, Dept Anim Ecol, Wageningen, Netherlands.
Brommer, Jon E. (author)
Univ Turku, Dept Biol, Univ Hill, FI-02700 Turku, Finland.
Grant, B. Rosemary (author)
Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA.
Gustafsson, Lars (author)
Uppsala universitet,Zooekologi
Hatchwell, Ben J. (author)
Univ Sheffield, Dept Anim & Plant Sci, Western Bank, Sheffield S10 2TN, S Yorkshire, England.
Jerstad, Kurt (author)
Aurebekksveien 61, NO-4516 Mandal, Norway.
Karell, Patrik (author)
Abo Akad Univ, Dept Biosci Environm & Marine Biol, FI-02700 Turku, Finland.;Novia Univ Appl Sci, Coastal Zone Res Team, Raseborgsvagen 9, FI-10600 Ekenas, Finland.
Pietiainen, Hannu (author)
Univ Helsinki, Dept Biosci, Bird Ecol Unit, FI-00014 Helsinki, Finland.
Roulin, Alexandre (author)
Univ Lausannne, Dept Ecol & Evolut, Biophore, CH-1024 Lausanne, Switzerland.
Rostad, Ole W. (author)
Norwegian Univ Life Sci, Dept Ecol & Nat Resource Management, NO-1432 As, Norway.
Weimerskirch, Henri (author)
CNRS, Ctr Etud Biol Chize, UPR 1934, F-79360 Villiers En Bois, France.
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Norwegian Univ Sci & Technol, Ctr Biodivers Dynam, Dept Biol, NO-7491 Trondheim, Norway Norwegian Univ Sci & Technol, Ctr Biodivers Dynam, Dept Math Sci, NO-7491 Trondheim, Norway. (creator_code:org_t)
2016-06-22
2016
English.
In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 7
Related links:
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • There is large interspecific variation in the magnitude of population fluctuations, even among closely related species. The factors generating this variation are not well understood, primarily because of the challenges of separating the relative impact of variation in population size from fluctuations in the environment. Here, we show using demographic data from 13 bird populations that magnitudes of fluctuations in population size are mainly driven by stochastic fluctuations in the environment. Regulation towards an equilibrium population size occurs through density-dependent mortality. At small population sizes, population dynamics are primarily driven by environment-driven variation in recruitment, whereas close to the carrying capacity K, variation in population growth is more strongly influenced by density-dependent mortality of both juveniles and adults. Our results provide evidence for the hypothesis proposed by Lack that population fluctuations in birds arise from temporal variation in the difference between density-independent recruitment and density-dependent mortality during the non-breeding season.

Subject headings

NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

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