Stability of ecosystem functioning and diversity of grasslands at the landscape scale

Diversity often increases ecosystem functioning and enhances stability, but this relationship has been evaluated at the community scale and considering, for the most part, only species richness. Here, we explored the relationship between landscape diversity and either the coefficient of variation or...

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Otros Autores: Aragón, Roxana, Oesterheld, Martín, Irisarri, Jorge Gonzalo Nicolás, Texeira, Marcos
Formato: Artículo
Lenguaje:Inglés
Materias:
EVI
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2011Aragon.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
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024 |a 10.1007/s10980-011-9625-z 
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245 1 0 |a Stability of ecosystem functioning and diversity of grasslands at the landscape scale 
520 |a Diversity often increases ecosystem functioning and enhances stability, but this relationship has been evaluated at the community scale and considering, for the most part, only species richness. Here, we explored the relationship between landscape diversity and either the coefficient of variation or the interannual standard deviation of greenness in Pampean grasslands and Patagonian meadows, and tried to elucidate the mechanisms responsible for the resulting patterns. The coefficient of variation decreased with increasing landscape richness in Pampas but remained constant in Patagonia, while the interannual standard deviation of greenness decreased in both regions. The diversity-variability relationship in Pampean grasslands was largely accounted for by the mechanism of statistical averaging, while in Patagonian meadows, it was accounted for by a combination of statistical averaging, mean-variance rescaling and positive covariation of landscape units. There were no cases of negative covariance among landscape units. This is the first demonstration that landscape diversity increases stability of ecosystem functioning. 
650 |2 Agrovoc  |9 26 
653 0 |a ECOSYSTEM FUNCTIONING 
653 0 |a EQUITABILITY 
653 0 |a EVI 
653 0 |a FLOODING PAMPA 
653 0 |a INSURANCE HYPOTHESIS 
653 0 |a PATAGONIAN MEADOW 
653 0 |a PRIMARY PRODUCTIVITY 
653 0 |a RICHNESS 
653 0 |a STATISTICAL AVERAGING 
653 0 |a TEMPORAL VARIABILITY 
653 0 |a COVARIANCE ANALYSIS 
653 0 |a ECOSYSTEM FUNCTION 
653 0 |a FLOODING 
653 0 |a GRASSLAND 
653 0 |a LANDSCAPE ECOLOGY 
653 0 |a LANDSCAPE STRUCTURE 
653 0 |a PRIMARY PRODUCTION 
653 0 |a SPECIES RICHNESS 
653 0 |a TEMPORAL VARIATION 
653 0 |a ARGENTINA 
653 0 |a PAMPAS 
653 0 |a PATAGONIA 
700 1 |a Aragón, Roxana  |9 25630 
700 1 |a Oesterheld, Martín  |9 8019 
700 1 |9 12998  |a Irisarri, Jorge Gonzalo Nicolás 
700 1 |a Texeira, Marcos  |9 32541 
773 |t Landscape Ecology  |g Vol.26, no.7 (2011), p.1011-1022 
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