Multi-annual survey of health status disturbance in the Bilbao estuary (Bay of Biscay) based on sediment chemistry and juvenile sole (Solea spp.) histopathology
| Autor: | Javier Franco, Izaskun Zorita, Ionan Marigómez, Urtzi Izagirre, Nagore Cuevas, Tifanie Briaudeau |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Gills Male Geologic Sediments Context (language use) 010501 environmental sciences Aquatic Science Oceanography Ecotoxicology 01 natural sciences Demersal zone Animals Gonads Ecosystem 0105 earth and related environmental sciences geography geography.geographical_feature_category 010604 marine biology & hydrobiology Sediment Biota Estuary Juvenile fish Pollution Fishery Liver Benthic zone Metals Spain Flatfishes Environmental science Female Estuaries Bay Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 145 |
| ISSN: | 1879-3363 |
| Popis: | The Bilbao estuary (SE Bay of Biscay) is a recovering ecosystem whose sediments are still contaminated. They represent a potential risk for the biota including benthic and demersal species living in direct contact with the sediment. In this context, the present study aims to survey trends of the health status of the Bilbao estuary based on sediment chemistry and sole (Solea spp.) histopathology. Monitoring campaigns were carried out every autumn from 2011 to 2017 along the estuary. Contaminant levels were measured in sediments; liver, gills and gonads of juvenile fish were collected for histopathology. Overall, contaminant levels fluctuated throughout the years, with highest values recorded in the earlier years of the study period. Sole histopathology showed alterations of mild severity. Results permitted to assess the environmental health status of the Bilbao estuary during 7 years, although no clear temporal trend was detected. Longer-term monitoring programmes are necessary to confirm the ecosystem recovery. |
| Databáze: | OpenAIRE |
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