Climate-induced temporal variation in the productivity-diversity relationship

Daniel C. Laughlin, Margaret M Moore

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Spatial scales are known to influence the form of the productivity- diversity relationship, but less attention has been given to the influence of temporal scales. Interannual climatic variation in semi-arid ponderosa pine-bunchgrass ecosystems causes significant year-to-year differences in herbaceous production. We hypothesized that unimodal (or 'hump-backed') relationships would be detected between herbaceous production and species richness in wet years, whereas positive logarithmic relationships would be detected in dry years. We analyzed nine years of herbaceous production and species richness data and used Akaike's information criterion (AICc) to determine the weight of evidence for each model in each year. As predicted, species richness exhibited a unimodal relationship to herbaceous production in wet years; however, richness exhibited a logarithmic relationship with herbaceous production in dry years. These results suggest that competitive exclusion occurred within this semi-arid plant community in years of high production when enough moisture was available to drive abundant plant growth. Thus, just as it is important to sample broad spatial variation in production to detect the full unimodal productivity-diversity relationship, it is also important to recognize that the full unimodal curve may be undetectable in less productive dry years in semi-arid ecosystems.

Original languageEnglish (US)
Pages (from-to)897-902
Number of pages6
JournalOikos
Volume118
Issue number6
DOIs
StatePublished - Jun 2009

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temporal variation
species richness
climate
species diversity
productivity
weight-of-evidence
Akaike information criterion
ecosystems
competitive exclusion
ecosystem
Pinus ponderosa
spatial variation
plant community
plant communities
moisture
plant growth
sampling

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

Climate-induced temporal variation in the productivity-diversity relationship. / Laughlin, Daniel C.; Moore, Margaret M.

In: Oikos, Vol. 118, No. 6, 06.2009, p. 897-902.

Research output: Contribution to journalArticle

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