Structuring functional groups of aquatic insects along the resistance/resilience axis when facing water flow changes.

Autor: Godoy BS; Centre of Aquatic Ecology and Fishery Federal University of Pará Belém Pará Brazil., Valente-Neto F; Federal University of Mato Grosso do Sul Campo Grande Brazil., Queiroz LL; Institute of Biomedical Science USP São Paulo Brazil., Holanda LFR; Program of Ecology and Evolution UFG Goiânia Brazil., Roque FO; Federal University of Mato Grosso do Sul Campo Grande Brazil.; Centre for Tropical Environmental and Sustainability Science (TESS) James Cook University Cairns Queensland Australia., Lodi S; Program of Ecology and Evolution UFG Goiânia Brazil., Oliveira LG; Biological Science Institute UFG Goiânia Brazil.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2022 Mar 26; Vol. 12 (3), pp. e8749. Date of Electronic Publication: 2022 Mar 26 (Print Publication: 2022).
DOI: 10.1002/ece3.8749
Abstrakt: Understanding how differences in intensity and frequency of hydrological disturbances affect the resistance and resilience of aquatic organisms is key to manage aquatic systems in a fast-changing world. Some aquatic insects have strategies that improve the permanence (resistance), while others use strategies that favor recolonization (resilience). Therefore, we carried out a manipulative experiment to understand the influence of functional characteristics of aquatic insects in their permanence and recolonization against hydrological disturbances in streams in the biodiversity hotspot of the Cerrado of Brazil. We placed 200 artificial substrates in five streams and submitted them to changing water flow regimes that differed both in frequency and intensity, and we observed the response of the aquatic community for 39 days. We used a hierarchical Bayesian approach to estimate the probabilities of permanence and recolonization of each life strategy group (nine groups). We observed that the most intense changes in the water flow tended to affect the permanence of almost all groups, but the intensity of this effect reduced over time. On the other hand, less frequent disturbances, regardless of intensity, tended to reduce the permanence of most groups of aquatic insects over time. The different effects of disturbance intensity may have been related to a greater recolonization capacity of some groups. The results we present are worrisome in a scenario of reduced riparian vegetation around streams and with the expectation of precipitation becoming more concentrated in shorter periods of time due to climate change in the Cerrado hotspot, reducing the occurrence of many groups of aquatic insects in their habitat, particularly those with traits associated with resistance against hydrological disturbance.
Competing Interests: The authors declare that they have no conflict of interest.
(© 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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