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Long-term dynamics of winter and summer annual communities in the Chihuahuan Desert

Journal of Vegetation Science

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Abstract

Using 15 years of census data from permanent quadrats, this paper compared the characteristics and temporal dynamics of these two distinct, spatially coexistent but temporally segregated communities. Although the total number of summer annual species recorded during our 15 years observation was higher than winter annuals, the average number of species observed each year was higher in the winter community. The winter community exhibited lower temporal variation in total plant abundance and populations of individual species, lower species turnover rate and higher evenness than the summer community. The higher seasonal species diversity (i.e., number of species observed in each season) in winters rather than the overall special pool (over 15 yrs) may be responsible for the greater community stability of winter annuals. The difference in long-term community dynamics between the two communities of annuals plants are likely due to the differences in total species pool, life history traits (e.g., seed size), and seasonal climatic regimes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Long-term dynamics of winter and summer annual communities in the Chihuahuan Desert
Series title:
Journal of Vegetation Science
Volume
13
Year Published:
2002
Language:
English
Contributing office(s):
Northern Prairie Wildlife Research Center
Description:
p. 575-584
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Vegetation Science
First page:
575
Last page:
584