Anthropogenic disturbances alter the relationships between environmental heterogeneity and biodiversity of stream insects
نویسندگان
چکیده
The effects of anthropogenic disturbance on multiple facets biodiversity are poorly understood. In this study, we worked with the hypothesis that disturbances affect relationship between environmental heterogeneity (EH) and biodiversity. We used a model selection approach to test three predictions. P1: greater level disturbance, weaker will be EH both taxonomic functional alpha diversities. P2: sign strength correlations metrics diversities depend disturbance. P3: Taxonomic beta not respond gradient. sampled 76 stream sites in Brazilian Neotropical savanna collected insect orders Ephemeroptera, Plecoptera Trichoptera measure For P1, did find trend decreasing increasing Results confirmed P2. Spatial flow diversity was positively correlated least-disturbed sites. Bankfull height variation negatively moderately-disturbed Thalweg depth most-disturbed partially P3 because conclude biodiversity-EH is same at all levels finding has implications for biomonitoring ecosystem management.
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ژورنال
عنوان ژورنال: Ecological Indicators
سال: 2021
ISSN: ['1470-160X', '1872-7034']
DOI: https://doi.org/10.1016/j.ecolind.2020.107079