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Titolo:
Disturbance, resource supply, and food-web architecture in streams
Autore:
Townsend, CR; Thompson, RM; McIntosh, AR; Kilroy, C; Edwards, E; Scarsbrook, MR;
Indirizzi:
Univ Otago, Dept Zool, Dunedin, New Zealand Univ Otago Dunedin New Zealand v Otago, Dept Zool, Dunedin, New Zealand Univ Canterbury, Dept Zool, Christchurch 1, New Zealand Univ Canterbury Christchurch New Zealand 1 , Christchurch 1, New Zealand Natl Inst Water & Atmospher Res, Christchurch, New Zealand Natl Inst Water& Atmospher Res Christchurch New Zealand h, New Zealand Dept Conservat, Southland Conservancy, Invercargill, New Zealand Dept Conservat Invercargill New Zealand ancy, Invercargill, New Zealand Natl Inst Water & Atmospher Res, Hamilton, New Zealand Natl Inst Water & Atmospher Res Hamilton New Zealand ilton, New Zealand
Titolo Testata:
ECOLOGY LETTERS
fascicolo: 3, volume: 1, anno: 1998,
pagine: 200 - 209
SICI:
1461-023X(199811)1:3<200:DRSAFA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROPHIC INTERACTIONS; COMMUNITY STRUCTURE; TEMPORAL VARIATION; HABITAT TEMPLET; SPECIES TRAITS; NEW-ZEALAND; RIVER; PRODUCTIVITY; PERIPHYTON; ECOSYSTEMS;
Keywords:
connectance; detritus; disturbance; epilithon; fish; food webs; food-chain length; macroinvertebrates; productivity; streams;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Townsend, CR Univ Otago, Dept Zool, POB 56, Dunedin, New Zealand Univ Otago POB 56 Dunedin New Zealand Dunedin, New Zealand
Citazione:
C.R. Townsend et al., "Disturbance, resource supply, and food-web architecture in streams", ECOL LETT, 1(3), 1998, pp. 200-209

Abstract

We studied food webs comprising fish, macroinvertebrates, and algae (identified to species or morphospecies) in small streams using a consistent methodology at the same spatial and temporal scales. Our aim was to test apriori hypotheses derived from dynamic-demographic and energetics models concerning the effects of disturbance and resource availability on food-web attributes. The regime of bed disturbance affecting the organisms in the webs wasmeasured in 10 streams. We also derived measures of the supply of resources for animals in the webs in terms of algal primary productivity and detritus standing crop. Both web size and number of links per species were significantly negatively related to mean intensity of bed disturbance. Mean chainlength had a significant positive relationship with algal primary productivity but not disturbance, No food-web attribute was related to detritus standing crop.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 20:27:45