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首页> 外文期刊>Limnology >Insect dispersal ability is crucial to overcome limitations in patch colonization of Eichhornia crassipes floating meadows
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Insect dispersal ability is crucial to overcome limitations in patch colonization of Eichhornia crassipes floating meadows

机译：Insect dispersal ability is crucial to overcome limitations in patch colonization of Eichhornia crassipes floating meadows

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Dispersal is a pivotal process in ecology since it determines species presence across patches in landscapes. Therefore, understanding dispersal may be critical in light of current environmental changes. Here, we conducted an experiment to evaluate how richness, density, and beta-diversity of insects with strong and/or weak aquatic and aerial dispersal abilities are influenced by colonization limitation of aerial and aquatic patches of a floating macrophyte. We used nets to isolate the aquatic (by roots) and aerial (by leaves) routes by which insects may colonize floating macrophytes. We found that strong aquatic and aerial dispersers were not affected by colonization limitation, since the richness and density of these groups did not decrease with limited colonization. Conversely, limited colonization resulted in a strong decrease in the richness and density of weak aquatic and aerial dispersers. Also, the beta diversity of weak dispersers strongly increased with limited colonization, whereas strong dispersers produced more homogeneous communities (low beta diversity). Our findings illustrate that increasing habitat fragmentation and destruction should have stronger impacts on weak dispersers as they are not able to overcome the habitat scarcity. Consequently, only strong dispersers may persist, leading to high community similarity.

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