Function and structure of microbial biofilms in saline shallow lakes: limits and adaptations to environmental extremes
ENG- Hypersaline lakes are extreme ecosystems with high salt concentrations, often shallow and subject to natural drying periods. Despite their high ecological value, they are threatened by climate change, which puts them at risk of experiencing even higher salinity levels, longer droughts, and risi...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/695218 |
| Acceso en línea: | http://hdl.handle.net/10803/695218 |
| Access Level: | acceso embargado |
| Palabra clave: | Llacs hipersalins Lagos hipersalinos Hypersaline lakes Biofilms Biopelículas Sequera Sequía Drought Activitat aquàtica Actividad acuática Water activity Sediment Sedimento Activitats enzimàtiques extracel·lulars Actividades enzimáticas extracelulares Extracellular enzyme activities Substàncies polimèriques extracel·lulars Sustancias poliméricas extracelulares Extracellular polymeric substances 504 628 |
| Sumario: | ENG- Hypersaline lakes are extreme ecosystems with high salt concentrations, often shallow and subject to natural drying periods. Despite their high ecological value, they are threatened by climate change, which puts them at risk of experiencing even higher salinity levels, longer droughts, and rising temperatures. Microorganisms play a key role in these ecosystems, as they regulate biogeochemical cycles, especially those of organic matter and carbon. This thesis investigates the biofilms, which are assemblages of microorganisms, that inhabit the sediments of shallow hypersaline lakes. The main objective is to understand how these biofilms adapt to changes in water availability and temperature variations. The results of this thesis show that, although the biofilms in hypersaline lakes are resilient to temperature fluctuations, they do respond to water scarcity. This suggests that such environments are particularly vulnerable to impacts like drought, which could disrupt the organic matter cycle and, consequently, alter the carbon cycle as well |
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