Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates
Temporal variation in food web structure is widespread among highly seasonal environments, such as the Arctic, and is driven by changes in resource availability. Variation in resource availability can lead to species differences in diet composition, isotopic niche width, and trophic position (TP) ac...
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Canadian Science Publishing
2023
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Online Access: | http://dx.doi.org/10.1139/as-2023-0027 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2023-0027 https://cdnsciencepub.com/doi/pdf/10.1139/as-2023-0027 |
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crcansciencepubl:10.1139/as-2023-0027 2023-12-17T10:22:41+01:00 Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates Fuirst, Matthew Elliott, Kyle H. Ferguson, Steven H. Fisk, Aaron T. Harris, Les N. Hedges, Kevin J. Jacobs, Kevin B. Johnson, Kelsey F. Loewen, Tracey N. Matthews, Cory J. D. Mundy, C.J. Niemi, Andrea Ogloff, Wesley R. Watt, Cortney A. Yurkowski, David J. MEOPAR-NCE Earth Rangers Natural Sciences and Engineering Research Council of Canada Churchill Marine Observatory Arctic Research Foundation Fisheries and Oceans Canada 2023 http://dx.doi.org/10.1139/as-2023-0027 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2023-0027 https://cdnsciencepub.com/doi/pdf/10.1139/as-2023-0027 en eng Canadian Science Publishing https://creativecommons.org/licenses/by/4.0/deed.en_GB Arctic Science ISSN 2368-7460 General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science journal-article 2023 crcansciencepubl https://doi.org/10.1139/as-2023-0027 2023-11-19T13:39:08Z Temporal variation in food web structure is widespread among highly seasonal environments, such as the Arctic, and is driven by changes in resource availability. Variation in resource availability can lead to species differences in diet composition, isotopic niche width, and trophic position (TP) across seasons. Here, we used tissue samples that represent two distinct turnover rates for diet (liver = shorter term, muscle = longer term) from 18 fish and three marine mammal species to investigate seasonal (i) variation in TPs within the Southampton Island marine ecosystem of Hudson Bay, (ii) variation in consumer isotopic niche width within this part of the food web, and (iii) variation in community niche dynamics among a fish and marine mammal community using stable carbon (δ 13 C) and nitrogen (δ 15 N) isotope analyses. Many zooplanktivores and piscivores increased in TP in summer (i.e., shorter-term turnover period), whereas benthic feeders dependent on ice-obligate prey decreased in TP. Most isotopic niche widths and community metrics (δ 15 N range, total ellipse area, mean centroid distance) were higher in liver than muscle. Our findings demonstrate seasonal changes in TPs, which suggests that Arctic communities may be differentially affected by longer ice-free periods and earlier onset of primary production due to accelerated climate change. Article in Journal/Newspaper Arctic Arctic Climate change Hudson Bay Southampton Island Canadian Science Publishing (via Crossref) Arctic Hudson Bay Hudson Southampton Island ENVELOPE(-84.501,-84.501,64.463,64.463) Arctic Science |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science Fuirst, Matthew Elliott, Kyle H. Ferguson, Steven H. Fisk, Aaron T. Harris, Les N. Hedges, Kevin J. Jacobs, Kevin B. Johnson, Kelsey F. Loewen, Tracey N. Matthews, Cory J. D. Mundy, C.J. Niemi, Andrea Ogloff, Wesley R. Watt, Cortney A. Yurkowski, David J. Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates |
topic_facet |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
description |
Temporal variation in food web structure is widespread among highly seasonal environments, such as the Arctic, and is driven by changes in resource availability. Variation in resource availability can lead to species differences in diet composition, isotopic niche width, and trophic position (TP) across seasons. Here, we used tissue samples that represent two distinct turnover rates for diet (liver = shorter term, muscle = longer term) from 18 fish and three marine mammal species to investigate seasonal (i) variation in TPs within the Southampton Island marine ecosystem of Hudson Bay, (ii) variation in consumer isotopic niche width within this part of the food web, and (iii) variation in community niche dynamics among a fish and marine mammal community using stable carbon (δ 13 C) and nitrogen (δ 15 N) isotope analyses. Many zooplanktivores and piscivores increased in TP in summer (i.e., shorter-term turnover period), whereas benthic feeders dependent on ice-obligate prey decreased in TP. Most isotopic niche widths and community metrics (δ 15 N range, total ellipse area, mean centroid distance) were higher in liver than muscle. Our findings demonstrate seasonal changes in TPs, which suggests that Arctic communities may be differentially affected by longer ice-free periods and earlier onset of primary production due to accelerated climate change. |
author2 |
MEOPAR-NCE Earth Rangers Natural Sciences and Engineering Research Council of Canada Churchill Marine Observatory Arctic Research Foundation Fisheries and Oceans Canada |
format |
Article in Journal/Newspaper |
author |
Fuirst, Matthew Elliott, Kyle H. Ferguson, Steven H. Fisk, Aaron T. Harris, Les N. Hedges, Kevin J. Jacobs, Kevin B. Johnson, Kelsey F. Loewen, Tracey N. Matthews, Cory J. D. Mundy, C.J. Niemi, Andrea Ogloff, Wesley R. Watt, Cortney A. Yurkowski, David J. |
author_facet |
Fuirst, Matthew Elliott, Kyle H. Ferguson, Steven H. Fisk, Aaron T. Harris, Les N. Hedges, Kevin J. Jacobs, Kevin B. Johnson, Kelsey F. Loewen, Tracey N. Matthews, Cory J. D. Mundy, C.J. Niemi, Andrea Ogloff, Wesley R. Watt, Cortney A. Yurkowski, David J. |
author_sort |
Fuirst, Matthew |
title |
Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates |
title_short |
Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates |
title_full |
Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates |
title_fullStr |
Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates |
title_full_unstemmed |
Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates |
title_sort |
seasonal variation in trophic structure and community niche dynamics of an arctic coastal community of marine vertebrates |
publisher |
Canadian Science Publishing |
publishDate |
2023 |
url |
http://dx.doi.org/10.1139/as-2023-0027 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2023-0027 https://cdnsciencepub.com/doi/pdf/10.1139/as-2023-0027 |
long_lat |
ENVELOPE(-84.501,-84.501,64.463,64.463) |
geographic |
Arctic Hudson Bay Hudson Southampton Island |
geographic_facet |
Arctic Hudson Bay Hudson Southampton Island |
genre |
Arctic Arctic Climate change Hudson Bay Southampton Island |
genre_facet |
Arctic Arctic Climate change Hudson Bay Southampton Island |
op_source |
Arctic Science ISSN 2368-7460 |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.en_GB |
op_doi |
https://doi.org/10.1139/as-2023-0027 |
container_title |
Arctic Science |
_version_ |
1785551329131757568 |