Are networks of trophic interactions sufficient for understanding the dynamics of multi-trophic communities? Analysis of a tri-trophic insect food-web time-series
| Autor: | Kazutaka Kawatsu, Masayuki Ushio, F. J. Frank van Veen, Michio Kondoh |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
education.field_of_study Food Chain Insecta Ecology 010604 marine biology & hydrobiology media_common.quotation_subject Population Nutritional Status Insect Biology 010603 evolutionary biology 01 natural sciences Food web Dynamic coupling Nonlinear time series analysis Community dynamics Animals education Ecology Evolution Behavior and Systematics Trophic level media_common |
| Zdroj: | Ecology lettersReferences. 24(3) |
| ISSN: | 1461-0248 |
| Popis: | Resource-consumer interactions are considered a major driving force of population and community dynamics. However, species also interact in many non-trophic and indirect ways and it is currently not known to what extent the dynamic coupling of species corresponds to the distribution of trophic links. Here, using a 10-year data set of monthly observations of a 40-species tri-trophic insect community and nonlinear time series analysis, we compare the occurrence and strengths of both the trophic and dynamic interactions in the insect community. The matching between observed trophic and dynamic interactions provides evidence that population dynamic interactions reflect resource-consumer interactions in the many-species community. However, the presence of a trophic interaction does not always correspond to a detectable dynamic interaction especially for top-down effects. Moreover a considerable proportion of dynamic interactions are not attributable to direct trophic interactions, suggesting the unignorable role of non-trophic and indirect interactions as co-drivers of community dynamics. |
| Databáze: | OpenAIRE |
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