Evaluating the response of current biotic indices and functional metrics to natural and anthropogenic predictors in disconnected pools of temporary rivers
Visualitza/Obre
Autor/a
Ersoy, Zeynep
López-Rodríguez, Nieves
Acosta, Raúl
Soria, Maria
Gomà, Joan
Gallart, Francesc
Múrria, Cesc
Latron, Jérôme
Llorens, Pilar
Fortuño, Pau
Quevedo-Ortiz, Guillermo
Prat, Narcís
Cañedo-Argüelles, Miguel
Bonada, Núria
Data de publicació
2024-07-15ISSN
0048-9697
Resum
Temporary rivers, forming the majority of river networks worldwide, are key biodiversity hotspots. Despite their great value for maintaining biodiversity and ecosystem functioning, they are often neglected in biomonitoring programs due to several challenges, such as their variable hydromorphology and the difficulty of establishing reference conditions given their dynamic nature, resulting in highly variable communities. Disconnected pools often form in temporary rivers when flow ceases, providing refuge for aquatic taxa. Given their importance for biodiversity conservation, revising and adapting biotic indices are needed. Here, we evaluate the performance of current biological indices designed for perennial rivers (macroinvertebrates, diatoms) and functional metrics (macroinvertebrates) in assessing biological quality of disconnected pools. We sampled 55 disconnected pools in Catalonia, NE Spain, covering local (e.g., physico-chemical variables, water chemistry) and regional (e.g., human influence, hydrological variables at the water body level) natural and anthropogenic gradients. Only a few macroinvertebrate biotic indices (e.g., family richness, EPT/EPT + OCH and OCH) showed strong responses to anthropogenic predictors and were unaffected by natural predictors at both local and regional scales, making them suitable for biomonitoring. Of the newly adopted functional metrics of macroinvertebrate communities tested, only two (i.e., functional redundancy of predators and response diversity based on the total community) responded strongly to anthropogenic predictors. The rest showed varying responses to the interactive effect of anthropogenic and natural predictors, requiring calibration efforts. Models assessing these metrics explained <40 % of the total variation, likely due to the interplay of colonization/extinction dynamics and density-dependent trophic interactions governing community assemblages in disconnected pools. Although some existing biological metrics could potentially be used to monitor the ecological status of disconnected pools, we call for further development of biomonitoring tools specifically designed for these habitats since they will become more widespread with global change.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
English
Matèries (CDU)
574 - Ecologia general i biodiversitat
Pàgines
13
Publicat per
Elsevier
Publicat a
Science of The Total Environment
Citació
Ersoy, Zeynep, Nieves López-Rodríguez, Raúl Acosta, Maria Soria, Joan Gomà, Francesc Gallart, Cesc Múrria, et al. 2024. “Evaluating the Response of Current Biotic Indices and Functional Metrics to Natural and Anthropogenic Predictors in Disconnected Pools of Temporary Rivers.” The Science of the Total Environment, 174825. https://doi.org/10.1016/j.scitotenv.2024.174825.
Número de l'acord de la subvenció
MICINN/Programa Estatal para impulsar la investigación científico-técnica y su transferencia/PID2021-126143OB-C21/ES/Herramientas avanzadas para la evaluación del estado ecológico de ríos temporales mediterráneos durante su fase seca/DRY-Guadalmed
MICINN/Programa Estatal de promoción del talento y su empleabilidad en I+D+I/RYC2020-029829-I/ES/ /
MICINN/Programa Estatal de promoción del talento y su empleabilidad en I+D+I/FJC2021-046825-I/ES/ /
FEDER/ / /EU/ /
Programa
Aigües Marines i Continentals
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