Mercury and stable isotopes portray colony-specific foraging grounds in southern rockhopper penguins over the Patagonian Shelf
Copyright © 2022 Elsevier Ltd. All rights reserved..
Mercury pollution is a serious global environmental issue and the characterization of its distribution and its driving forces should be urgently included in research agendas. We report unusually high mercury (Hg) concentrations (>5 μg/g) along with stable isotopes values in feathers of southern rockhopper penguins (Eudyptes chrysocome) from colonies in the Southwest Atlantic Ocean. We found a highly heterogenous prevalence of Hg throughout the study area and over a three-fold higher mean Hg concentration in southernmost colonies. Variation in Hg concentrations among colonies is primarily explained by site, rather than by trophic position. We provide further support to the existence of a Hg hotspot in the food web of the Patagonian Shelf and spatially restrict it to the southern tip of South America. Our findings highlight the need for regional and colony-based seabird conservation management when high local variability and plasticity in foraging habits is evident.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:184 |
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| Enthalten in: |
Marine pollution bulletin - 184(2022) vom: 05. Nov., Seite 114137 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Lois, Nicolás A [VerfasserIn] |
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| Links: |
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| Themen: |
Bioaccumulation |
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| Anmerkungen: |
Date Completed 28.10.2022 Date Revised 28.10.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.marpolbul.2022.114137 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Mercury pollution is a serious global environmental issue and the characterization of its distribution and its driving forces should be urgently included in research agendas. We report unusually high mercury (Hg) concentrations (>5 μg/g) along with stable isotopes values in feathers of southern rockhopper penguins (Eudyptes chrysocome) from colonies in the Southwest Atlantic Ocean. We found a highly heterogenous prevalence of Hg throughout the study area and over a three-fold higher mean Hg concentration in southernmost colonies. Variation in Hg concentrations among colonies is primarily explained by site, rather than by trophic position. We provide further support to the existence of a Hg hotspot in the food web of the Patagonian Shelf and spatially restrict it to the southern tip of South America. Our findings highlight the need for regional and colony-based seabird conservation management when high local variability and plasticity in foraging habits is evident | ||
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| 700 | 1 | |a Pütz, Klemens |e verfasserin |4 aut | |
| 700 | 1 | |a Polito, Michael J |e verfasserin |4 aut | |
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| 700 | 1 | |a Rey, Andrea Raya |e verfasserin |4 aut | |
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