Spatial variation in the accumulation of POPs and mercury in bottlenose dolphins of the Lower Florida Keys and the coastal Everglades (South Florida)

Autor: France Damseaux, Jeremy J. Kiszka, Michael R. Heithaus, George Scholl, Gauthier Eppe, Jean-Pierre Thomé, Jennifer Lewis, Wensi Hao, Michaël C. Fontaine, Krishna Das
Přispěvatelé: Marine Sciences Program, Florida International University [Miami] (FIU), Department of Biological Sciences [Miami], CART, Université de Liège, Laboratory of Animal Ecology and Ecotoxicology, Groningen Institute for Evolutionary Life Sciences [Groningen] (GELIFES), University of Groningen [Groningen], Diversity, ecology, evolution & Adaptation of arthropod vectors (MIVEGEC-DEEVA), Evolution des Systèmes Vectoriels (ESV), Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Laboratory of oceanology — MARE center, Université de Liège, Genomics Research in Ecology & Evolution in Nature, Fontaine lab
Rok vydání: 2017
Předmět:
Male
010504 meteorology & atmospheric sciences
Health
Toxicology and Mutagenesis
Zoology
chemistry.chemical_element
010501 environmental sciences
Toxicology
01 natural sciences
Predation
chemistry.chemical_compound
Blubber
Halogenated Diphenyl Ethers
Animals
14. Life underwater
Ecosystem
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
Trophic level
biology
Aquatic animal
Environmental Exposure
Mercury
General Medicine
Hexachlorobenzene
Bottlenose dolphin
biology.organism_classification
Polychlorinated Biphenyls
Pollution
Mercury (element)
Bottle-Nosed Dolphin
Fishery
chemistry
13. Climate action
Florida
Female
[SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Mangrove
Water Pollutants
Chemical
Environmental Monitoring
Zdroj: Environmental Pollution
Environmental Pollution, Elsevier, 2017, 220, pp.577-587. ⟨10.1016/j.envpol.2016.10.005⟩
Environmental Pollution, 220(Part A), 577-587. ELSEVIER SCI LTD
ISSN: 0269-7491
1873-6424
DOI: 10.1016/j.envpol.2016.10.005
Popis: The bottlenose dolphin ( Tursiops truncatus ) is an upper trophic level predator and the most common cetacean species found in nearshore waters of southern Florida, including the Lower Florida Keys (LFK) and the Florida Coastal Everglades (FCE). The objective of this study was to assess contamination levels of total mercury (T-Hg) in skin and persistent organic pollutants (PCBs, PBDEs, DDXs, HCHs, HCB, Σ PCDD/Fs and Σ DL-PCBs) in blubber samples of bottlenose dolphins from LFK (n = 27) and FCE (n = 24). PCBs were the major class of compounds found in bottlenose dolphin blubber and were higher in individuals from LFK (Σ 6 PCBs LFK males: 13,421 ± 7730 ng g −1 lipids, Σ 6 PCBs LFK females: 9683 ± 19,007 ng g −1 lipids) than from FCE (Σ 6 PCBs FCE males: 5638 ng g −1 ± 3627 lipids, Σ 6 PCBs FCE females: 1427 ± 908 ng g −1 lipids). These levels were lower than previously published data from the southeastern USA. The Σ DL-PCBs were the most prevalent pollutants of dioxin and dioxin like compounds (Σ DL-PCBs LFK: 739 ng g −1 lipids, Σ DL-PCBs FCE: 183 ng g −1 lipids) since PCDD/F concentrations were low for both locations (mean 0.1 ng g −1 lipids for LFK and FCE dolphins). The toxicity equivalences of PCDD/Fs and DL-PCBs expressed as TEQ in LFK and FCE dolphins is mainly expressed by DL-PCBs (81% LFK - 65% FCE). T-Hg concentrations in skin were significantly higher in FCE (FCE median 9314 ng g −1 dw) compared to LFK dolphins (LFK median 2941 ng g −1 dw). These concentrations are the highest recorded in bottlenose dolphins in the southeastern USA, and may be explained, at least partially, by the biogeochemistry of the Everglades and mangrove sedimentary habitats that create favourable conditions for the retention of mercury and make it available at high concentrations for aquatic predators.
Databáze: OpenAIRE
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