Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula
Under the climate change context, warming Southern Ocean waters may allow mercury (Hg) to become more bioavailable to the Antarctic marine food web (i.e., ice-stored Hg release and higher methylation rates by microorganisms), whose biomagnification processes are poorly documented. Biomagnification o...
Published in: | Environmental Pollution |
---|---|
Main Authors: | , , , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2022
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/267214 https://doi.org/10.1016/j.envpol.2022.119199 https://doi.org/10.13039/501100001871 https://doi.org/10.13039/501100000780 |
id |
ftcsic:oai:digital.csic.es:10261/267214 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/267214 2024-02-11T09:57:46+01:00 Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula Matías, Ricardo S. Guímaro, Hugo R. Bustamante, Paco Seco, José Chipev, Nesho Fragao, Joana Tavares, Sílvia Ceia, Filipe R. Pereira, María E. Barbosa, Andrés Xavier, José C. Fundação para a Ciência e a Tecnologia (Portugal) European Commission 2022-07-01 http://hdl.handle.net/10261/267214 https://doi.org/10.1016/j.envpol.2022.119199 https://doi.org/10.13039/501100001871 https://doi.org/10.13039/501100000780 en eng Elsevier Sí Environmental Pollution 304: 119199 (2022) 0269-7491 http://hdl.handle.net/10261/267214 doi:10.1016/j.envpol.2022.119199 1873-6424 http://dx.doi.org/10.13039/501100001871 http://dx.doi.org/10.13039/501100000780 none Trophodynamics Trace metals Stable isotopes Livingston Island Trophic magnification factors Southern Ocean artículo http://purl.org/coar/resource_type/c_6501 2022 ftcsic https://doi.org/10.1016/j.envpol.2022.11919910.13039/50110000187110.13039/501100000780 2024-01-16T11:23:10Z Under the climate change context, warming Southern Ocean waters may allow mercury (Hg) to become more bioavailable to the Antarctic marine food web (i.e., ice-stored Hg release and higher methylation rates by microorganisms), whose biomagnification processes are poorly documented. Biomagnification of Hg in the food web of the Antarctic Peninsula, one of the world's fastest-warming regions, was examined using carbon (δ13C) and nitrogen (δ15N) stable isotope ratios for estimating feeding habitat and trophic levels, respectively. The stable isotope signatures and total Hg (T-Hg) concentrations were measured in Antarctic krill Euphausia superba and several Antarctic predator species, including seabirds (gentoo penguins Pygoscelis papua, chinstrap penguins Pygoscelis antarcticus, brown skuas Stercorarius antarcticus, kelp gulls Larus dominicanus, southern giant petrels Macronectes giganteus) and marine mammals (southern elephant seals Mirounga leonina). Significant differences in δ13C values among species were noted with a great overlap between seabird species and M. leonina. As expected, significant differences in δ15N values among species were found due to interspecific variations in diet-related to their trophic position within the marine food web. The lowest Hg concentrations were registered in E. superba (0.007 ± 0.008 μg g−1) and the highest values in M. giganteus (12.090 ± 14.177 μg g−1). Additionally, a significant positive relationship was found between Hg concentrations and trophic levels (reflected by δ15N values), biomagnifying nearly 2 times its concentrations at each level. Our results support that trophic interaction is the major pathway for Hg biomagnification in Southern Ocean ecosystems and warn about an increase in the effects of Hg on long–lived (and high trophic level) Antarctic predators under climate change in the future. This study was supported by the Portuguese Foundation for Science and Technology (FCT) through a PhD grant to S. Tavares (SFRH/BD/48908/2008) and to José Seco ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula antarcticus Elephant Seals Euphausia superba Giant Petrels Livingston Island Macronectes giganteus Mirounga leonina Pygoscelis papua Southern Elephant Seals Southern Ocean Stercorarius antarcticus Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Giganteus ENVELOPE(62.500,62.500,-67.567,-67.567) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Southern Ocean The Antarctic Environmental Pollution 304 119199 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Trophodynamics Trace metals Stable isotopes Livingston Island Trophic magnification factors Southern Ocean |
spellingShingle |
Trophodynamics Trace metals Stable isotopes Livingston Island Trophic magnification factors Southern Ocean Matías, Ricardo S. Guímaro, Hugo R. Bustamante, Paco Seco, José Chipev, Nesho Fragao, Joana Tavares, Sílvia Ceia, Filipe R. Pereira, María E. Barbosa, Andrés Xavier, José C. Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula |
topic_facet |
Trophodynamics Trace metals Stable isotopes Livingston Island Trophic magnification factors Southern Ocean |
description |
Under the climate change context, warming Southern Ocean waters may allow mercury (Hg) to become more bioavailable to the Antarctic marine food web (i.e., ice-stored Hg release and higher methylation rates by microorganisms), whose biomagnification processes are poorly documented. Biomagnification of Hg in the food web of the Antarctic Peninsula, one of the world's fastest-warming regions, was examined using carbon (δ13C) and nitrogen (δ15N) stable isotope ratios for estimating feeding habitat and trophic levels, respectively. The stable isotope signatures and total Hg (T-Hg) concentrations were measured in Antarctic krill Euphausia superba and several Antarctic predator species, including seabirds (gentoo penguins Pygoscelis papua, chinstrap penguins Pygoscelis antarcticus, brown skuas Stercorarius antarcticus, kelp gulls Larus dominicanus, southern giant petrels Macronectes giganteus) and marine mammals (southern elephant seals Mirounga leonina). Significant differences in δ13C values among species were noted with a great overlap between seabird species and M. leonina. As expected, significant differences in δ15N values among species were found due to interspecific variations in diet-related to their trophic position within the marine food web. The lowest Hg concentrations were registered in E. superba (0.007 ± 0.008 μg g−1) and the highest values in M. giganteus (12.090 ± 14.177 μg g−1). Additionally, a significant positive relationship was found between Hg concentrations and trophic levels (reflected by δ15N values), biomagnifying nearly 2 times its concentrations at each level. Our results support that trophic interaction is the major pathway for Hg biomagnification in Southern Ocean ecosystems and warn about an increase in the effects of Hg on long–lived (and high trophic level) Antarctic predators under climate change in the future. This study was supported by the Portuguese Foundation for Science and Technology (FCT) through a PhD grant to S. Tavares (SFRH/BD/48908/2008) and to José Seco ... |
author2 |
Fundação para a Ciência e a Tecnologia (Portugal) European Commission |
format |
Article in Journal/Newspaper |
author |
Matías, Ricardo S. Guímaro, Hugo R. Bustamante, Paco Seco, José Chipev, Nesho Fragao, Joana Tavares, Sílvia Ceia, Filipe R. Pereira, María E. Barbosa, Andrés Xavier, José C. |
author_facet |
Matías, Ricardo S. Guímaro, Hugo R. Bustamante, Paco Seco, José Chipev, Nesho Fragao, Joana Tavares, Sílvia Ceia, Filipe R. Pereira, María E. Barbosa, Andrés Xavier, José C. |
author_sort |
Matías, Ricardo S. |
title |
Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula |
title_short |
Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula |
title_full |
Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula |
title_fullStr |
Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula |
title_full_unstemmed |
Mercury biomagnification in an Antarctic food web of the Antarctic Peninsula |
title_sort |
mercury biomagnification in an antarctic food web of the antarctic peninsula |
publisher |
Elsevier |
publishDate |
2022 |
url |
http://hdl.handle.net/10261/267214 https://doi.org/10.1016/j.envpol.2022.119199 https://doi.org/10.13039/501100001871 https://doi.org/10.13039/501100000780 |
long_lat |
ENVELOPE(62.500,62.500,-67.567,-67.567) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Giganteus Livingston Island Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Giganteus Livingston Island Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula antarcticus Elephant Seals Euphausia superba Giant Petrels Livingston Island Macronectes giganteus Mirounga leonina Pygoscelis papua Southern Elephant Seals Southern Ocean Stercorarius antarcticus |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula antarcticus Elephant Seals Euphausia superba Giant Petrels Livingston Island Macronectes giganteus Mirounga leonina Pygoscelis papua Southern Elephant Seals Southern Ocean Stercorarius antarcticus |
op_relation |
Sí Environmental Pollution 304: 119199 (2022) 0269-7491 http://hdl.handle.net/10261/267214 doi:10.1016/j.envpol.2022.119199 1873-6424 http://dx.doi.org/10.13039/501100001871 http://dx.doi.org/10.13039/501100000780 |
op_rights |
none |
op_doi |
https://doi.org/10.1016/j.envpol.2022.11919910.13039/50110000187110.13039/501100000780 |
container_title |
Environmental Pollution |
container_volume |
304 |
container_start_page |
119199 |
_version_ |
1790593316659658752 |