Global warming triggers abrupt regime shifts in island lake ecosystems in the Azores Archipelago

Global warming significantly alters lake ecosystems worldwide. However, the effects of warming at aregional scale are often overlooked due to the scarcity of multidecadal to centennial regional studies.Here, we examined diatom sedimentary records from five lakes on São Miguel Island (Azoresarchipela...

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Detalles Bibliográficos
Autores: Pla Rabés, Sergi, Matias, Miguel G., Gonçalves, Vítor, Vázquez-Loureiro, David, Marques, Helena, Bao, Roberto, Buchaca, Teresa, Hernández Hernández, Armand, Giralt Romeu, Santiago, Sáez, Alberto, Simpson, Gavin L., Nogué, Sandra, Raposeiro, Pedro Miguel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/215847
Acceso en línea:https://hdl.handle.net/2445/215847
Access Level:acceso abierto
Palabra clave:Ecosistemes
Ecologia dels llacs
Canvi climàtic
Açores
Biotic communities
Lake ecology
Climatic change
Azores
Descripción
Sumario:Global warming significantly alters lake ecosystems worldwide. However, the effects of warming at aregional scale are often overlooked due to the scarcity of multidecadal to centennial regional studies.Here, we examined diatom sedimentary records from five lakes on São Miguel Island (Azoresarchipelago) over the last 170 years. Our analysis using hierarchical generalised additive modelsrevealed an abrupt shift in the island-wide diatom community around 1982 CE, when the NorthernHemisphere temperature exceeded 0.35 °C above the 20th-century mean. This community regimeshift resulted in a 27% loss in regional diatom diversity across the Island. Furthermore, previousanthropogenic impacts may have enhanced lakes’ rapid response to warming. These findingshighlight the vulnerability of freshwater island ecosystems to climate warming and emphasise theimportance of transitioning from local to regional assessments to preserve regional resilience andprevent irreversible damage to these essential freshwater resources and their biodiversity.

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