Relating plant species and functional diversity to community δ¹³C in NE Spain pastures
2009
Bello, Francesco de | Buchmann, Nina | Casals, Pere | Lepš, Jan | Sebastiá, María Teresa
The relationship of plant species and functional diversities to community-level δ¹³C, as a proxy for water carbon relations, was assessed in pastures from two climatic regions in NE Spain. Overall, community δ¹³C was negatively related to species diversity, but positively related to functional diversity. However, pronounced differences between climatic regions were found: smaller variations in δ¹³C and thus carbon-water relations were observed for communities under humid conditions, which had higher species diversity but were more functionally redundant than communities under arid conditions. Thus, if species and functional diversities affect plant carbon-water relations at the community and hence at the ecosystem level seems to depend strongly on functional redundancy, i.e., the overlap in plant traits among the species present.
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