Embryos of an Antarctic zooplankton require anoxia for dormancy, are permeable to lipophilic chemicals, and reside in sediments containing PCBs
| Autor: | Taylor N. M. Munden, Sung Gu Lee, Wonseok Lee, Joseph A. Covi, Katherine A. Reed, Jason M. Bleau, Hyun Soo Park, Sang-Hwan Lee |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Geologic Sediments Embryo Nonmammalian Climate Change Population lcsh:Medicine Antarctic Regions 010501 environmental sciences 01 natural sciences Zooplankton Article Permeability Copepoda Rotenone Temperate climate Animals lcsh:Science education 0105 earth and related environmental sciences Pollutant education.field_of_study Multidisciplinary biology 010604 marine biology & hydrobiology lcsh:R fungi Sediment Plankton biology.organism_classification Polychlorinated Biphenyls Cell Hypoxia Lakes Environmental chemistry Environmental science Dormancy lcsh:Q Environmental Pollutants Hydrophobic and Hydrophilic Interactions Copepod Environmental Monitoring |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-13 (2018) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-018-34689-w |
| Popis: | Zooplankton in Antarctic maritime lakes face challenges imposed by anthropogenic chemicals. Studies on temperate species suggest that lipophilic chemicals will accumulate in dormant embryos of Antarctic zooplankton and decrease hatching success, thereby threatening centuries of accumulated genetic diversity that would increase population resilience in the face of climate change. We evaluated the potential for lakes to act as sinks for legacy pollutants in the maritime Antarctic by testing sediments for polychlorinated biphenyls (PCBs) previously identified in soil, flora and fauna of lake catchments. Direct tests of embryo permeability to chemicals are confounded by potential adhesion of chemicals to the embryo surface and limited biomass available. Therefore, in order to assess the potential for lipophilic chemicals to penetrate and passively accumulate in dormant embryos of Antarctic lacustrine zooplankton, we evaluated the effect of anoxia on post-diapause development in the calanoid copepod, Boeckella poppei, and then used chemical anoxia induced by rotenone as a reporter for permeability of these embryos to moderately lipophilic chemicals. The data presented demonstrate that embryos of B. poppei from Antarctic lake sediments will passively accumulate moderately lipophilic chemicals while lying dormant in anoxic sediments. Implications for legacy POPs in sediments of Antarctic maritime lakes are discussed. |
| Databáze: | OpenAIRE |
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