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Central-place seed foraging and vegetation patterns

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  • Mari, Lorenzo
  • Gatto, Marino
  • Casagrandi, Renato

Abstract

We investigate how central-place seed foragers with a nest in the proximity of one or more seed sources determine the formation of different vegetation patterns. In particular, we discuss the ecological conditions that lead to the formation of hump-shaped (Janzen–Connell) patterns in a two-dimensional landscape. Our analysis shows that central-place predation can generate Janzen–Connell patterns even if predators’ movement strategies are exclusively based on resource abundance, both in the single-plant/single-nest case and in a forest with several seed sources. We also show that social foraging may either promote or work against the formation of Janzen–Connell patterns, depending upon the way foragers take advantage of social interactions.

Suggested Citation

  • Mari, Lorenzo & Gatto, Marino & Casagrandi, Renato, 2009. "Central-place seed foraging and vegetation patterns," Theoretical Population Biology, Elsevier, vol. 76(4), pages 229-240.
    • Handle: RePEc:eee:thpobi:v:76:y:2009:i:4:p:229-240
    DOI: 10.1016/j.tpb.2009.08.001
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    References listed on IDEAS

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    1. Ran Nathan & Gabriel G. Katul & Henry S. Horn & Suvi M. Thomas & Ram Oren & Roni Avissar & Stephen W. Pacala & Simon A. Levin, 2002. "Mechanisms of long-distance dispersal of seeds by wind," Nature, Nature, vol. 418(6896), pages 409-413, July.
    2. Olsson, Ola & Brown, Joel S. & Helf, Kurt L., 2008. "A guide to central place effects in foraging," Theoretical Population Biology, Elsevier, vol. 74(1), pages 22-33.
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