Food Webs and Niche Space. (MPB-11)
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Auteur:
Joel E. Cohen
David W. Stephens
Co-auteur:
Janet Gunn
- Engels
- Paperback
- 9780691082028
- 21 augustus 1978
- 208 pagina's
Samenvatting
Presents a technique for obtaining a partial answer to this elementary question about niche space. This work also discusses other features of real food webs, including the constant ratio of the number of kinds of prey to the number of kinds of predators in food webs that describe a community.
What is the minimum dimension of a niche space necessary to represent the overlaps among observed niches? This book presents a new technique for obtaining a partial answer to this elementary question about niche space. The author bases his technique on a relation between the combinatorial structure of food webs and the mathematical theory of interval graphs. Professor Cohen collects more than thirty food webs from the ecological literature and analyzes their statistical and combinatorial properties in detail. As a result, he is able to generalize: within habitats of a certain limited physical and temporal heterogeneity, the overlaps among niches, along their trophic (feeding) dimensions, can be represented in a one-dimensional niche space far more often than would be expected by chance alone and perhaps always. This compatibility has not previously been noticed. It indicates that real food webs fall in a small subset of the mathematically possible food webs. Professor Cohen discusses other apparently new features of real food webs, including the constant ratio of the number of kinds of prey to the number of kinds of predators in food webs that describe a community. In conclusion he discusses possible extensions and limitations of his results and suggests directions for future research.
What is the minimum dimension of a niche space necessary to represent the overlaps among observed niches? This book presents a new technique for obtaining a partial answer to this elementary question about niche space. The author bases his technique on a relation between the combinatorial structure of food webs and the mathematical theory of interval graphs. Professor Cohen collects more than thirty food webs from the ecological literature and analyzes their statistical and combinatorial properties in detail. As a result, he is able to generalize: within habitats of a certain limited physical and temporal heterogeneity, the overlaps among niches, along their trophic (feeding) dimensions, can be represented in a one-dimensional niche space far more often than would be expected by chance alone and perhaps always. This compatibility has not previously been noticed. It indicates that real food webs fall in a small subset of the mathematically possible food webs. Professor Cohen discusses other apparently new features of real food webs, including the constant ratio of the number of kinds of prey to the number of kinds of predators in food webs that describe a community. In conclusion he discusses possible extensions and limitations of his results and suggests directions for future research.
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- Taal
- en
- Bindwijze
- Paperback
- Oorspronkelijke releasedatum
- 21 augustus 1978
- Aantal pagina's
- 208
- Illustraties
- Nee
Betrokkenen
- Hoofdauteur
- Joel E. Cohen
- Tweede Auteur
- David W. Stephens
- Co Auteur
- Janet Gunn
- Hoofduitgeverij
- Princeton University Press
Overige kenmerken
- Editie
- illustrated edition
- Extra groot lettertype
- Nee
- Product breedte
- 136 mm
- Product hoogte
- 14 mm
- Product lengte
- 217 mm
- Studieboek
- Ja
- Verpakking breedte
- 140 mm
- Verpakking hoogte
- 216 mm
- Verpakking lengte
- 216 mm
- Verpakkingsgewicht
- 255 g
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- EAN
- 9780691082028
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zuiver en ongelezen exemplaar uit 1978, eerste druk, 190 pag. met drie appendices, references en index, zeer lichte gebruikssporen op omslag, schutblad en snede, licht verkleurd op pagina, in zeer goede staat - clean and unused copy
zuiver en ongelezen exemplaar uit 1978, eerste druk, 190 pag. met drie appendices, references en index, zeer lichte gebruikssporen op omslag, schutblad en snede, licht verkleurd op pagina, in zeer goede staat - clean and unused copy
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