Agricultural intensification drives changes in hybrid network robustness by modifying network structure
| Autor: | Berry J. Brosi, Rodolfo Dirzo, Beth M. L. Morrison |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Computer science Ecology 010604 marine biology & hydrobiology Hybrid species Robustness (evolution) Network structure Agriculture Plants Biota 010603 evolutionary biology 01 natural sciences Agricultural intensification Nestedness Herbivory Interaction type Pollination Biological system Ecosystem Ecology Evolution Behavior and Systematics |
| Zdroj: | Ecology Letters. 23:359-369 |
| ISSN: | 1461-0248 1461-023X |
| Popis: | Within ecological communities, species engage in myriad interaction types, yet empirical examples of hybrid species interaction networks composed of multiple types of interactions are still scarce. A key knowledge gap is understanding how the structure and stability of such hybrid networks are affected by anthropogenic disturbance. Using 15,169 interaction observations, we constructed 16 hybrid herbivore-plant-pollinator networks along an agricultural intensification gradient to explore changes in network structure and robustness to local extinctions. We found that agricultural intensification led to declines in modularity but increases in nestedness and connectance. Notably, network connectance, a structural feature typically thought to increase robustness, caused declines in hybrid network robustness, but the directionality of changes in robustness along the gradient depended on the order of local species extinctions. Our results not only demonstrate the impacts of anthropogenic disturbance on hybrid network structure, but they also provide unexpected insights into the structure-stability relationship of hybrid networks. |
| Databáze: | OpenAIRE |
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