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Titolo:
Biotic validation of small open-top chambers in a tundra ecosystem
Autore:
Hollister, RD; Webber, PJ;
Indirizzi:
Michigan State Univ, Dept Bot & Plant Pathol, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 athol, E Lansing, MI 48824 USA
Titolo Testata:
GLOBAL CHANGE BIOLOGY
fascicolo: 7, volume: 6, anno: 2000,
pagine: 835 - 842
SICI:
1354-1013(200010)6:7<835:BVOSOC>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIMULATED CLIMATE-CHANGE; PLANT-COMMUNITIES; RESPONSES; METAANALYSIS; GREENHOUSES; TEMPERATURE; VEGETATION; GROWTH; ITEX;
Keywords:
arctic tundra; chamber; climate change; ITEX; plant response; warming;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Hollister, RD Michigan State Univ, Dept Bot & Plant Pathol, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 ng, MI 48824 USA
Citazione:
R.D. Hollister e P.J. Webber, "Biotic validation of small open-top chambers in a tundra ecosystem", GL CHANGE B, 6(7), 2000, pp. 835-842

Abstract

Small open-top chambers (OTC) are used widely in ecosystem warming experiments. The efficacy of the open-top chamber as an analogue of climatic warming is examined. Twenty-four small OTCs were used to passively warm canopy temperatures in wet meadow tundra at Barrow, Alaska, during two consecutive summers with contrasting surface air-temperatures. Fortuitously, the seasonal average temperature regime within chambers in the colder year (1995) wassimilar to the controls of the warmer year (1996); this allowed a comparison of natural vs. chamber warming. All measured plant responses behaved similarly to both year and treatment 68% of the time. A comparison of the populations of the warmer summer's control with the cooler summer's OTC found no statistical difference in 80% of the response variables measured. A meta-analysis also found no significant difference between the responses of the two populations. These results give empirical biotic validation for the useof the OTC as an analogue of regional climate warming.

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Documento generato il 29/11/20 alle ore 06:48:26