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Sökning: onr:"swepub:oai:DiVA.org:umu-83747" > Abrupt community tr...

Abrupt community transitions and cyclic evolutionary dynamics in complex food webs

Takahashi, Daisuke (författare)
Brännström, Åke, (författare)
Umeå universitet, Institutionen för matematik och matematisk statistik, Evolution and Ecology Program, International Institute for Applied Systems Analysis (IIASA), Austria
Mazzucco, Rupert (författare)
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Yamauchi, Atsushi (författare)
Dieckmann, Ulf (författare)
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2013
Engelska.
Ingår i: Journal of Theoretical Biology. - Academia Press. - 0022-5193 .- 1095-8541. ; 337, s. 181-189
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • <p>Understanding the emergence and maintenance of biodiversity ranks among the most fundamental challenges in evolutionary ecology. While processes of community assembly have frequently been analyzed from an ecological perspective, their evolutionary dimensions have so far received less attention. To elucidate the eco-evolutionary processes underlying the long-term build-up and potential collapse of community diversity, here we develop and examine an individual-based model describing coevolutionary dynamics driven by trophic interactions and interference competition, of a pair of quantitative traits determining predator and prey niches. Our results demonstrate the (1) emergence of communities with multiple trophic levels, shown here for the first time for stochastic models with linear functional responses, and (2) intermittent and cyclic evolutionary transitions between two alternative community states. In particular, our results indicate that the interplay of ecological and evolutionary dynamics often results in extinction cascades that remove the entire trophic level of consumers from a community. Finally, we show the (3) robustness of our results under variations of model assumptions, underscoring that processes of consumer collapse and subsequent rebound could be important elements of understanding biodiversity dynamics in natural communities.</p>

Ämnesord

NATURVETENSKAP  -- Biologiska vetenskaper (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Nyckelord

Individual-based model
Extinction cascade
Trophic-level evolution
Consumer collapse

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