Relationships between species diversity and community variability in alpine meadow plant communities and their underlying mechanisms

Abstract

Abstract: By analyzing the plant community data from a natural alpine meadow,effects of the similarity in species composition,statistical averaging,net covariance,and population variability on the relationships of species diversity with the variability of aboveground biomass in alpine meadow plant community were investigated.The results showed that the variability of aboveground biomass per plot decreased with increasing species richness and composition similarity,while there was no significant correlation between species diversity and composition similarity.It was statistical averaging but not net covariance the dominant factor determining the negative correlation between species diversity and variability in aboveground biomass.Population variability also devoted,but only a few,to the negative correlation.

Key words: Hypophthalmichthys molitrix, Fertilization, Plankton, Biomass, Community structure, Saline-alkaline ponds, Enclosure ecosystem

CLC Number:

Q948.1

QIN Guanglian, DU Guozhen. Relationships between species diversity and community variability in alpine meadow plant communities and their underlying mechanisms[J]. cje, 2005, (11): 1303-1307.

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