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| Format: | Artículo científico |
| Sprache: | en |
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Environmental pollution (Barking, Essex : 1987)
2025
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| Online-Zugang: | https://pubmed.ncbi.nlm.nih.gov/39643225/ |
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| author | Asiedu, Delove Abraham Jónasdóttir, Sigrun Søndergaard, Jens Thomas, Helmuth Hempel, Niklas Koski, Marja |
| author_facet | Asiedu, Delove Abraham Jónasdóttir, Sigrun Søndergaard, Jens Thomas, Helmuth Hempel, Niklas Koski, Marja Asiedu, Delove Abraham Jónasdóttir, Sigrun Søndergaard, Jens Thomas, Helmuth Hempel, Niklas Koski, Marja |
| collection | PubMed - marine biology |
| contents | Mercury bioaccumulation and assimilation in marine plankton in meltwater influenced fjords and shelf waters along the east coast of Greenland. Asiedu, Delove Abraham Jónasdóttir, Sigrun Søndergaard, Jens Thomas, Helmuth Hempel, Niklas Koski, Marja Mercury Greenland Water Pollutants, Chemical Plankton Environmental Monitoring Animals Bioaccumulation Food Chain Seawater Arctic Regions Zooplankton Methylmercury Compounds The rapid melting of the Arctic cryosphere due to climate change will result in significant freshwater input into Arctic marine ecosystems. This might also cause the release of legacy mercury (Hg) stored in the cryosphere, increasing Hg concentration and its subsequent effects on the marine biota. However, there is scarce knowledge on the concentration of Hg in the lower trophic level organisms at the base of the Arctic pelagic food web. This is particularly important since these organisms modulate the transfer of Hg to higher trophic levels, including fish and marine mammals. We quantified the total Hg (THg) concentration in two plankton size classes (>200 and 50-200 μm) in coastal waters along the east Greenland coast and investigated the potential assimilation efficiency of both inorganic Hg (IHg) and methyl Hg (MeHg) in mesozooplankton and their faecal pellets in experimental incubations. The concentration of THg in plankton ranged from 12 to 109 ng (g dw) without clear trends between geographic locations or between fjords and coastal areas. Also, the concentrations did not vary between the different plankton size fractions. MeHg concentrations were lower in the mesozooplankton faecal pellets than IHg, which may be due to the higher assimilation of MeHg than IHg in mesozooplankton tissue. Our results confirm that Arctic zooplankton assimilates MeHg more efficiently than IHg and may contribute significantly to the partitioning and cycling of different Hg types in Arctic marine ecosystems. |
| format | Artículo científico |
| id | pubmed_39643225 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Environmental pollution (Barking, Essex : 1987) |
| record_format | pubmed |
| spellingShingle | Mercury bioaccumulation and assimilation in marine plankton in meltwater influenced fjords and shelf waters along the east coast of Greenland. Asiedu, Delove Abraham Jónasdóttir, Sigrun Søndergaard, Jens Thomas, Helmuth Hempel, Niklas Koski, Marja Mercury Greenland Water Pollutants, Chemical Plankton Environmental Monitoring Animals Bioaccumulation Food Chain Seawater Arctic Regions Zooplankton Methylmercury Compounds Mercury bioaccumulation and assimilation in marine plankton in meltwater influenced fjords and shelf waters along the east coast of Greenland. Asiedu, Delove Abraham Jónasdóttir, Sigrun Søndergaard, Jens Thomas, Helmuth Hempel, Niklas Koski, Marja Mercury Greenland Water Pollutants, Chemical Plankton Environmental Monitoring Animals Bioaccumulation Food Chain Seawater Arctic Regions Zooplankton Methylmercury Compounds The rapid melting of the Arctic cryosphere due to climate change will result in significant freshwater input into Arctic marine ecosystems. This might also cause the release of legacy mercury (Hg) stored in the cryosphere, increasing Hg concentration and its subsequent effects on the marine biota. However, there is scarce knowledge on the concentration of Hg in the lower trophic level organisms at the base of the Arctic pelagic food web. This is particularly important since these organisms modulate the transfer of Hg to higher trophic levels, including fish and marine mammals. We quantified the total Hg (THg) concentration in two plankton size classes (>200 and 50-200 μm) in coastal waters along the east Greenland coast and investigated the potential assimilation efficiency of both inorganic Hg (IHg) and methyl Hg (MeHg) in mesozooplankton and their faecal pellets in experimental incubations. The concentration of THg in plankton ranged from 12 to 109 ng (g dw) without clear trends between geographic locations or between fjords and coastal areas. Also, the concentrations did not vary between the different plankton size fractions. MeHg concentrations were lower in the mesozooplankton faecal pellets than IHg, which may be due to the higher assimilation of MeHg than IHg in mesozooplankton tissue. Our results confirm that Arctic zooplankton assimilates MeHg more efficiently than IHg and may contribute significantly to the partitioning and cycling of different Hg types in Arctic marine ecosystems. |
| title | Mercury bioaccumulation and assimilation in marine plankton in meltwater influenced fjords and shelf waters along the east coast of Greenland. |
| topic | Mercury Greenland Water Pollutants, Chemical Plankton Environmental Monitoring Animals Bioaccumulation Food Chain Seawater Arctic Regions Zooplankton Methylmercury Compounds |
| url | https://pubmed.ncbi.nlm.nih.gov/39643225/ |