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Titolo:
Biodiversity may regulate the temporal variability of ecological systems
Autore:
Cottingham, KL; Brown, BL; Lennon, JT;
Indirizzi:
Dartmouth Coll, Dept Biol Sci, Hanover, NH 03755 USA Dartmouth Coll Hanover NH USA 03755 Dept Biol Sci, Hanover, NH 03755 USA
Titolo Testata:
ECOLOGY LETTERS
fascicolo: 1, volume: 4, anno: 2001,
pagine: 72 - 85
SICI:
1461-023X(200101)4:1<72:BMRTTV>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIVERSITY-STABILITY RELATIONSHIPS; ECOSYSTEM FUNCTION; SPECIES RICHNESS; ECOTRON EXPERIMENT; STATISTICAL INEVITABILITY; CHANGING BIODIVERSITY; GRASSLAND ECOSYSTEMS; ANIMAL POPULATIONS; PLANT DIVERSITY; CORRECT CONTEXT;
Keywords:
biodiversity; insurance effect; species richness; stability; statistical averaging;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
85
Recensione:
Indirizzi per estratti:
Indirizzo: Cottingham, KL Dartmouth Coll, Dept Biol Sci, Hanover, NH 03755 USA Dartmouth Coll Hanover NH USA 03755 Hanover, NH 03755 USA
Citazione:
K.L. Cottingham et al., "Biodiversity may regulate the temporal variability of ecological systems", ECOL LETT, 4(1), 2001, pp. 72-85

Abstract

The effect of biodiversity on natural communities has recently emerged as a topic of considerable ecological interest. We review studies that explicitly test whether the number of species in a community (species richness) regulates the temporal variability of aggregate community (total biomass, productivity nutrient cycling) and population (density, biomass) properties. Theoretical studies predict that community variability should decline with increasing species richness, while population variability should increase. Many, but not all, empirical studies support these expectations. However, a closer look reveals that several empirical studies have either imperfect experimental designs or biased methods of calculating variability. Furthermore, most theoretical studies rely on highly unrealistic assumptions. We conclude that evidence to support the claim that biodiversity regulates temporal variability is accumulating, but not unequivocal. More research, in a broader array of ecosystem types and with careful attention to methodological considerations, is needed before we can make definitive statements regarding richness-variability relationships.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 07:49:18