Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park
The impacts of pollution and long-term effects of local clam populations are misunderstood in estuaries. The purpose of this study was to follow inorganic contamination in tissues, changes of physiological health indicators, such as condition factor (CF), growth index (GI), resistance in air emersio...
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ftmdpi:oai:mdpi.com:/2076-3417/12/3/1106/ 2023-08-20T04:05:34+02:00 Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park François Gagné Chantale André Samuel Turgeon Nadia Ménard agris 2022-01-21 application/pdf https://doi.org/10.3390/app12031106 EN eng Multidisciplinary Digital Publishing Institute Chemical and Molecular Sciences https://dx.doi.org/10.3390/app12031106 https://creativecommons.org/licenses/by/4.0/ Applied Sciences; Volume 12; Issue 3; Pages: 1106 Mya arenaria condition factor growth index air survival metals rare earths Text 2022 ftmdpi https://doi.org/10.3390/app12031106 2023-08-01T03:54:30Z The impacts of pollution and long-term effects of local clam populations are misunderstood in estuaries. The purpose of this study was to follow inorganic contamination in tissues, changes of physiological health indicators, such as condition factor (CF), growth index (GI), resistance in air emersion and dehydration rate, for 5 years in Mya arenaria clams. The sampling scheme comprised one reference site, two sites impacted by human activity (thereafter polluted) and one site recognized as a Saint-Lawrence Estuary (SLE) beluga whale feeding area without known pollution source (Baie Sainte-Marguerite (BSM)). This study revealed that the elemental contamination profiles in clams were increased but differed between the polluted and BSM compared to the reference site. At polluted sites, clams were contaminated by Ag (2.4-fold of reference site), Mn (2.5-fold) and V (6.3-fold). With respect to BSM, clams were mainly contaminated by Ce (2.5-fold), Co (2-fold), Ga (2-fold), La (2.8-fold), Hg (2.5-fold), Ni (2.2-fold), Sm (2-fold) and V (20-fold). This contamination profile suggests sources of pollution from particulate combustion products of gasoline/diesel, crude oil and urban inputs of pollution. The CF, GI and air survival time were all reduced in clams at the polluted sites, while only the CF and dehydration rates were decreased and increased, respectively, at BSM. Long-term analysis revealed that CF and GI tended to decrease over time with episodes of strong amplitude changes and became more resilient to air survival time. In conclusion, the long-term contamination of clams towards metals and elements could compromise the health status of local clam populations. The increased contamination of clams at BSM could represent a risk to the endangered SLE beluga whale population. Text Beluga Beluga whale Beluga* MDPI Open Access Publishing Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Applied Sciences 12 3 1106 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Mya arenaria condition factor growth index air survival metals rare earths |
spellingShingle |
Mya arenaria condition factor growth index air survival metals rare earths François Gagné Chantale André Samuel Turgeon Nadia Ménard Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park |
topic_facet |
Mya arenaria condition factor growth index air survival metals rare earths |
description |
The impacts of pollution and long-term effects of local clam populations are misunderstood in estuaries. The purpose of this study was to follow inorganic contamination in tissues, changes of physiological health indicators, such as condition factor (CF), growth index (GI), resistance in air emersion and dehydration rate, for 5 years in Mya arenaria clams. The sampling scheme comprised one reference site, two sites impacted by human activity (thereafter polluted) and one site recognized as a Saint-Lawrence Estuary (SLE) beluga whale feeding area without known pollution source (Baie Sainte-Marguerite (BSM)). This study revealed that the elemental contamination profiles in clams were increased but differed between the polluted and BSM compared to the reference site. At polluted sites, clams were contaminated by Ag (2.4-fold of reference site), Mn (2.5-fold) and V (6.3-fold). With respect to BSM, clams were mainly contaminated by Ce (2.5-fold), Co (2-fold), Ga (2-fold), La (2.8-fold), Hg (2.5-fold), Ni (2.2-fold), Sm (2-fold) and V (20-fold). This contamination profile suggests sources of pollution from particulate combustion products of gasoline/diesel, crude oil and urban inputs of pollution. The CF, GI and air survival time were all reduced in clams at the polluted sites, while only the CF and dehydration rates were decreased and increased, respectively, at BSM. Long-term analysis revealed that CF and GI tended to decrease over time with episodes of strong amplitude changes and became more resilient to air survival time. In conclusion, the long-term contamination of clams towards metals and elements could compromise the health status of local clam populations. The increased contamination of clams at BSM could represent a risk to the endangered SLE beluga whale population. |
format |
Text |
author |
François Gagné Chantale André Samuel Turgeon Nadia Ménard |
author_facet |
François Gagné Chantale André Samuel Turgeon Nadia Ménard |
author_sort |
François Gagné |
title |
Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park |
title_short |
Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park |
title_full |
Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park |
title_fullStr |
Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park |
title_full_unstemmed |
Spatio-Temporal Variation of Elemental Contamination and Health of Mya arenaria Clam in the Saguenay–St. Lawrence Marine Park |
title_sort |
spatio-temporal variation of elemental contamination and health of mya arenaria clam in the saguenay–st. lawrence marine park |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/app12031106 |
op_coverage |
agris |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) |
geographic |
Marguerite |
geographic_facet |
Marguerite |
genre |
Beluga Beluga whale Beluga* |
genre_facet |
Beluga Beluga whale Beluga* |
op_source |
Applied Sciences; Volume 12; Issue 3; Pages: 1106 |
op_relation |
Chemical and Molecular Sciences https://dx.doi.org/10.3390/app12031106 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/app12031106 |
container_title |
Applied Sciences |
container_volume |
12 |
container_issue |
3 |
container_start_page |
1106 |
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1774716117865988096 |