Influence of flow alteration and metal pollution on stream biota: from species to community-level responses
This thesis aimed to assess the responses of stream biota to flow alterations, in terms of water velocity increments and reductions of discharge, and to metal pollution. The investigations performed encompassed (i) respirometry studies using swim-tunnel respirometers to evaluate swimming capabilitie...
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| Formato: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Recursos: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/673742 |
| Acesso em linha: | http://hdl.handle.net/10803/673742 |
| Access Level: | acceso abierto |
| Palavra-chave: | Alteracions hidrològiques Alteraciones hidrológicas Hydrologic alterations Interaccions biòtiques Interacciones bióticas Biotic interactions Metalls pesants Metales pesados Heavy metals Contaminació per metalls Contaminación por metales Metal pollution Rius Ríos Streams Barbus meridionalis Barb de muntanya Algues Algas Algae Macroinvertebrats Macroinvertebrados Macroinvertebrates 504 574 |
| Resumo: | This thesis aimed to assess the responses of stream biota to flow alterations, in terms of water velocity increments and reductions of discharge, and to metal pollution. The investigations performed encompassed (i) respirometry studies using swim-tunnel respirometers to evaluate swimming capabilities, as indicative of water velocity tolerance, and physiological responses (energetic costs of swimming) of several freshwater fishes, as well as the drivers (morphological features) of variation within and among species; and (ii) field observational and mesocosm studies were carried out to evaluate the role of the threatened fish B. meridionalis as modulator of the response of stream ecosystem structure and function to anthropogenic stressors, such as hydrologic alterations (e.g. resulting from the water diversion) and metal pollution |
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