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Titolo:
The effect of spatial scale on evenness
Autore:
Wilson, JB; Steel, JB; King, WM; Gitay, H;
Indirizzi:
Univ Otago, Dept Bot, Dunedin, New Zealand Univ Otago Dunedin New Zealand iv Otago, Dept Bot, Dunedin, New Zealand New S Wales Agr & Fisheries, CRC Weed Management Syst, Orange Agr Inst, Orange, NSW 2800, Australia New S Wales Agr & Fisheries Orange NSW Australia2800 NSW 2800, Australia Australian Natl Univ, Inst Adv Studies, Ecosyst Dynam Grp, RSBS, Canberra,ACT 0200, Australia Australian Natl Univ Canberra ACT Australia 0200 erra,ACT 0200, Australia
Titolo Testata:
JOURNAL OF VEGETATION SCIENCE
fascicolo: 4, volume: 10, anno: 1999,
pagine: 463 - 468
SICI:
1100-9233(199908)10:4<463:TEOSSO>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMMUNITY STRUCTURE; ASSEMBLY RULES; NEW-ZEALAND; DUNE SLACK; DIVERSITY; VEGETATION; ABUNDANCE; RICHNESS; INDEX;
Keywords:
abundance distribution; dune slack; microheterogeneity; semi-arid grassland; spatial grain; spatial scale;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Wilson, JB Univ Otago, Dept Bot, POB 56, Dunedin, New Zealand Univ Otago POB 56 Dunedin New Zealand 6, Dunedin, New Zealand
Citazione:
J.B. Wilson et al., "The effect of spatial scale on evenness", J VEG SCI, 10(4), 1999, pp. 463-468

Abstract

The effect of spatial scale on species evenness has not previously been investigated. As the area of each sample of vegetation (i.e. the spatial grain) increases, evenness could in theory increase, decrease, or stay the same, though the simplest model predicts an increase. We use biomass data from four dune slack sites and two semi-arid grasslands, sampled to allow calculation of evenness at a range of spatial grains. In all six sites, evenness decreases as grain size increases, almost monotonically. It is hypothesizedthat such a pattern is a result of a general feature of plant species abundance distributions and of vegetation response to environmental microheterogeneity.

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Documento generato il 18/09/20 alle ore 17:09:40