Accumulation of organochlorine pesticides in reef organisms from marginal coral reefs in South Africa and links with coastal groundwater
| Autor: | Michael H. Schleyer, Marc S. Humphries, Archibold Buah-Kwofie, Sean N. Porter |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Coral Biodiversity 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Hydrocarbons Chlorinated Animals Pesticides Sinularia Groundwater Reef 0105 earth and related environmental sciences Invertebrate Pollutant geography geography.geographical_feature_category biology Coral Reefs Ecology 010604 marine biology & hydrobiology Coral reef Pesticide Anthozoa biology.organism_classification Pollution Porifera Environmental science Water Pollutants Chemical |
| Zdroj: | Marine Pollution Bulletin. 137:295-305 |
| ISSN: | 0025-326X |
| DOI: | 10.1016/j.marpolbul.2018.10.028 |
| Popis: | Coral reefs support rich levels of biodiversity, but are globally threatened by a multitude of factors, including land-sourced pollutants. Concentrations of organochlorine pesticides (OCPs) in three species of coral reef invertebrate at five sites along the Maputaland coast, South Africa were quantified. We aimed to assess spatial and interspecies variations in pesticide accumulation. Markedly high levels of a range of OCP residues were detected within tissues, with total concentrations (ng g−1 ww) ranging from 460 to 1200 (Sarcophyton glaucum), 1100–3000 (Sinularia gravis) and 450–1500 (Theonella swinhoei), respectively. A decreasing gradient in total pesticide concentrations was detected southward from Regal Reef, opposite Lake Sibaya, the hypothesised source of the pollutants. Observed gradients in pesticide concentrations and nitrogen isotope signatures indicated coastal groundwater to be the likely source of the pollutants. Further studies are required to assess the potential ecotoxicological impacts of these contaminants at the organismal and ecosystem level. |
| Databáze: | OpenAIRE |
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