Multiple stressors in Mediterranean coastal wetland ecosystems: Influence of salinity and an insecticide on zooplankton communities under different temperature conditions.
Chemosphere
; 269: 129381, 2021 Apr.
Article
en En
| MEDLINE
| ID: mdl-33383245
ABSTRACT
Temperature increase, salinity intrusion and pesticide pollution have been suggested to be among the main stressors affecting the biodiversity of coastal wetland ecosystems. Here we assessed the single and combined effects of these stressors on zooplankton communities collected from a Mediterranean coastal lagoon. An indoor microcosm experiment was designed with temperature variation (20⯰C and 30⯰C), salinity (no addition, 2.5â¯g/L NaCl) and the insecticide chlorpyrifos (no addition, 1⯵g/L) as treatments. The impact of these stressors was evaluated on water quality variables and on the zooplankton comunity (structure, diversity, abundance and taxa responses) for 28 days. This study shows that temperature is the main driver for zooplankton community change, followed by salinity and chlorpyrifos. The three stressors contributed to a decrease on zooplankton diversity. The increase of temperature contributed to an increase of zooplankton abundance. Salinity generally affected Cladocera, which resulted in a Copepoda increase at 20⯰C, and a reduction in the abundance of all major zooplankton groups at 30⯰C. The insecticide chlorpyrifos affected primarily Cladocera, altough the magnitude and duration of the direct and indirect effects caused by the insecticide substantially differed between the two temperature scenarios. Chlorpyrifos and salinity resulted in antagonistic effects on sensitive taxa (Cladocera) at 20⯰C and 30⯰C. This study shows that temperature can influence the direct and indirect effects of salinity and pesticides on zooplankton communities in Mediterranean coastal wetlands, and highlights vulnerable taxa and ecological responses that are expected to dominate under future global change scenarios.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Zooplancton
/
Insecticidas
Límite:
Animals
Idioma:
En
Revista:
Chemosphere
Año:
2021
Tipo del documento:
Article
País de afiliación:
Brasil