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The efficacy of benthic indices to evaluate the ecological quality and urbanization effects on sandy beach ecosystems
Checon, H.H.; Corte, G.N.; Shah Esmaeili, Y.M.L.; Muniz, P.; Turra, A. (2023). The efficacy of benthic indices to evaluate the ecological quality and urbanization effects on sandy beach ecosystems. Sci. Total Environ. 856(Part 2): 159190. https://dx.doi.org/10.1016/j.scitotenv.2022.159190
In: Science of the Total Environment. Elsevier: Amsterdam. ISSN 0048-9697; e-ISSN 1879-1026, meer
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| Auteurs | | Top |
- Checon, H.H.
- Corte, G.N.
- Shah Esmaeili, Y.M.L.
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| Abstract |
Benthic indices have been widely used across different coastal ecosystems to assess ecological quality and detect anthropic impacts, but very few studies investigated their effectiveness on sandy beaches. Here, we evaluated and compared the efficacy of 12 assemblage-based benthic indices in assessing ecological quality in beaches, across a gradient of anthropic pressure and natural variability in 90 sandy beach sites. Overall, when sandy beaches were considered collectively, benthic indices had a poor performance in identifying decreases in ecological quality with increasing urbanization. However, when each morphodynamic type was evaluated separately, a few indices, especially those that were calibrated by reference conditions (i.e., M-AMBI, BAT, and BEQI-2), showed promising results for dissipative, and to a lesser extent, intermediate beaches. For reflective beaches, indices performed poorly, likely a reflection of the stronger natural disturbance these beaches are subjected to. Among functional indices, richness was found to be lower in urbanized beaches, but only in dissipative ones. Overall, our results show that benthic indices have the potential to be incorporated in sandy beach management and monitoring programs, especially for dissipative and intermediate beaches. For reflective beaches, given the early stage of studies with benthic indices in beaches, more research is needed to corroborate the observed patterns. |
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