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Titolo:
Community reassembly: a test using limestone grassland in New Zealand
Autore:
Lord, JM; Wilson, JB; Steel, JB; Anderson, BJ;
Indirizzi:
Univ Otago, Dept Bot, Dunedin, New Zealand Univ Otago Dunedin New Zealand iv Otago, Dept Bot, Dunedin, New Zealand
Titolo Testata:
ECOLOGY LETTERS
fascicolo: 3, volume: 3, anno: 2000,
pagine: 213 - 218
SICI:
1461-023X(200005)3:3<213:CRATUL>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT-COMMUNITIES; ECOLOGICAL COMMUNITIES; CONVERGENCE; STATES;
Keywords:
alternative stable states; assembly rules; calcareous; community assembly; deterministic; grassland; Humpty Dumpty; limestone; stochastic;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
34
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.M. Lord et al., "Community reassembly: a test using limestone grassland in New Zealand", ECOL LETT, 3(3), 2000, pp. 213-218

Abstract

To examine community reassembly, we sampled grasslands on calcareous soil (4%-24% CaCO3) in New Zealand that were largely composed of species introduced from Britain. We tested whether the British species had reassembled on New Zealand limestone into the same communities as they form on limestone in Britain. The vegetation of six New Zealand sites was sampled, each with ten 2 x 2 m quadrats that followed the standard methodology of the British National Vegetation Classification (NVC). Analysing species presence and cover using program TableFit with the full database of British species, the New Zealand species assemblages gave poor to moderate fits (40%-72%) to the communities of the NVC, and even then not to calcareous grassland, though one site did fit to a calcareous spring community. The poor fits can be partly attributed to the absence from New Zealand of many British calcareous-specialist species. On omitting from the NVC database all species not present in New Zealand, the fits increased somewhat to 48%-77%. Using this modifieddatabase, two sires fitted British calcareous grassland communities. Thesetwo sites are on thinner soil (<10 cm depth), under lower rainfall. Where fits were obtained to calcareous communities, the environment of the community in Britain matched very well that of the New Zealand site. It is concluded that environmental and perhaps biotic filtering has been strong enough in some sites to assort alien species into the same species assemblages as they form in their native range, indicating the Deterministic model of community structure. However, the absence of some species has prevented full reassembly.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 12:40:29