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Food-web structure in low- and high-dimensional trophic niche spaces
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för matematik och matematisk statistik.
2010 (engelsk)Inngår i: Journal of the Royal Society Interface, ISSN 1742-5689, E-ISSN 1742-5662, Vol. 7, nr 53, s. 1735-1743Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A question central to modelling and, ultimately, managing food webs concerns the dimensionality of trophic niche space, that is, the number of independent traits relevant for determining consumer-resource links. Food-web topologies can often be interpreted by assuming resource traits to be specified by points along a line and each consumer's diet to be given by resources contained in an interval on this line. This phenomenon, called intervality, has been known for 30 years and is widely acknowledged to indicate that trophic niche space is close to one-dimensional. We show that the degrees of intervality observed in nature can be reproduced in arbitrary-dimensional trophic niche spaces, provided that the processes of evolutionary diversification and adaptation are taken into account. Contrary to expectations, intervality is least pronounced at intermediate dimensions and steadily improves towards lower- and higher-dimensional trophic niche spaces.

sted, utgiver, år, opplag, sider
Royal Society Publishing , 2010. Vol. 7, nr 53, s. 1735-1743
Emneord [en]
intervality, evolution, Ornstein–Uhlenbeck process, Moran process, trait matching, phylogenetic correlations
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-58970DOI: 10.1098/rsif.2010.0111ISI: 000283660900008PubMedID: 20462875Scopus ID: 2-s2.0-78649879851OAI: oai:DiVA.org:umu-58970DiVA, id: diva2:550443
Tilgjengelig fra: 2012-09-11 Laget: 2012-09-07 Sist oppdatert: 2023-03-24bibliografisk kontrollert

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