期刊
ECOLOGY
卷 90, 期 8, 页码 2039-2046出版社
ECOLOGICAL SOC AMER
DOI: 10.1890/08-1837.1
关键词
forbidden links; Monte Desert, Mendoza, Argentina; neutrality; phenotypic complementarity; phylogenetic signal; plant-pollinator network; pollination; Villavicencio network
类别
资金
- CONICET [PIP 6564]
- FONCYT-ANPCYT [PICT 20805]
- BBVA Foundation [BIOCON03-162]
The structure of mutualistic networks is likely to result from the simultaneous influence of neutrality and the constraints imposed by complementarity in species phenotypes, phenologies, spatial distributions, phylogenetic relationships, and sampling artifacts. We develop a conceptual and methodological framework to evaluate the relative contributions of these potential determinants. Applying this approach to the analysis of a plant-pollinator network, we show that information on relative abundance and phenology suffices to predict several aggregate network properties (connectance, nestedness, interaction evenness, and interaction asymmetry). However, such information falls short of predicting the detailed network structure (the frequency of pairwise interactions), leaving a large amount of variation unexplained. Taken together, our results suggest that both relative species abundance and complementarity in spatiotemporal distribution contribute substantially to generate observed network patters, but that this information is by no means sufficient to predict the occurrence and frequency of pairwise interactions. Future studies could use our methodological framework to evaluate the generality of our findings in a representative sample of study systems with contrasting ecological conditions.
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