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Titolo:
Vegetation change and ecological processes in alpine and subalpine Sphagnum bogs of the Bogong High Plains, Victoria, Australia
Autore:
Wahren, CHA; Williams, RJ; Papst, WA;
Indirizzi:
La Trobe Univ, Dept Agr Sci, Bundoora, Vic 3086, Australia La Trobe Univ Bundoora Vic Australia 3086 , Bundoora, Vic 3086, Australia CSIRO, Winnellie, NT 0822, Australia CSIRO Winnellie NT Australia 0822CSIRO, Winnellie, NT 0822, Australia
Titolo Testata:
ARCTIC ANTARCTIC AND ALPINE RESEARCH
fascicolo: 3, volume: 33, anno: 2001,
pagine: 357 - 368
SICI:
1523-0430(200108)33:3<357:VCAEPI>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
EASTERN AUSTRALIA; RANGE TRANSECTS; KOSCIUSKO; GROWTH; TRENDS; REGENERATION; ENVIRONMENT; HEATHLAND; PEATLANDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
66
Recensione:
Indirizzi per estratti:
Indirizzo: Wahren, CHA Univ Alaska Fairbanks, Boreal Ecol Cooperat Res Unit, POB 756780, Fairbanks, AK 99775 USA Univ Alaska Fairbanks POB 756780 Fairbanks AK USA 99775 75 USA
Citazione:
C.H.A. Wahren et al., "Vegetation change and ecological processes in alpine and subalpine Sphagnum bogs of the Bogong High Plains, Victoria, Australia", ARCT ANTARC, 33(3), 2001, pp. 357-368

Abstract

Sphagnum bogs that were monitored over a 15-yr period showed significant changes in the abundance of diagnostic species. At plots ungrazed by cattle,the major bog species Sphagnum cristatum, Caltha introloba, and Carex gaudichaudiana increased significantly in cover. No such increases occurred in grazed plots. There were few changes in cover of the main structural vegetation types-closed heathland, low open heathland, and open herbfield on stony pavements. Sphagnum and the main herbfield species, Oreobolus pumilio andCaltha introloba, were dislodged and shifted over unvegetated stony pavements by snowmelt runoff, snowpack movement, and cattle trampling. Experiments using Sphagnum transplants showed this species capable of colonizing pavements by establishing on other plants. Survival and growth of transplants were significantly greater on low compared with high water flow (high energy) sites. Grazing and trampling by cattle significantly reduced survival of transplants. thus disrupting the colonization of pavements; firstly, by directly reducing the survival and growth of Sphagnum and other colonists; andsecondly, by preventing the formation of barriers to water flow that wouldfacilitate colonization. We propose a successional dynamic based on some of the processes operating in the open herbfield and stony pavements of Sphagnum bogs.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 08:04:15