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
2024
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Online Access: | https://doi.org/10.1139/as-2023-0027 https://doaj.org/article/720268b068c04072912c7ecf5d16aa5e |
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ftdoajarticles:oai:doaj.org/article:720268b068c04072912c7ecf5d16aa5e 2024-09-15T17:50:25+00:00 Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates Matthew Fuirst Kyle H. Elliott Steven H. Ferguson Aaron T. Fisk Les N. Harris Kevin J. Hedges Kevin B. Jacobs Kelsey F. Johnson Tracey N. Loewen Cory J. D. Matthews C.J. Mundy Andrea Niemi Wesley R. Ogloff Cortney A. Watt David J. Yurkowski 2024-03-01T00:00:00Z https://doi.org/10.1139/as-2023-0027 https://doaj.org/article/720268b068c04072912c7ecf5d16aa5e EN FR eng fre Canadian Science Publishing https://cdnsciencepub.com/doi/10.1139/as-2023-0027 https://doaj.org/toc/2368-7460 doi:10.1139/as-2023-0027 2368-7460 https://doaj.org/article/720268b068c04072912c7ecf5d16aa5e Arctic Science, Vol 10, Iss 1, Pp 34-47 (2024) Southampton Island marine mammals marine fishes food webs stable isotopes Environmental sciences GE1-350 Environmental engineering TA170-171 article 2024 ftdoajarticles https://doi.org/10.1139/as-2023-0027 2024-08-05T17:49:49Z 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 (δ13C) and nitrogen (δ15N) 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 (δ15N 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 Climate change Hudson Bay Southampton Island Directory of Open Access Journals: DOAJ Articles Arctic Science |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
Southampton Island marine mammals marine fishes food webs stable isotopes Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
Southampton Island marine mammals marine fishes food webs stable isotopes Environmental sciences GE1-350 Environmental engineering TA170-171 Matthew Fuirst Kyle H. Elliott Steven H. Ferguson Aaron T. Fisk Les N. Harris Kevin J. Hedges Kevin B. Jacobs Kelsey F. Johnson Tracey N. Loewen Cory J. D. Matthews C.J. Mundy Andrea Niemi Wesley R. Ogloff Cortney A. Watt David J. Yurkowski Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates |
topic_facet |
Southampton Island marine mammals marine fishes food webs stable isotopes Environmental sciences GE1-350 Environmental engineering TA170-171 |
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 (δ13C) and nitrogen (δ15N) 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 (δ15N 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. |
format |
Article in Journal/Newspaper |
author |
Matthew Fuirst Kyle H. Elliott Steven H. Ferguson Aaron T. Fisk Les N. Harris Kevin J. Hedges Kevin B. Jacobs Kelsey F. Johnson Tracey N. Loewen Cory J. D. Matthews C.J. Mundy Andrea Niemi Wesley R. Ogloff Cortney A. Watt David J. Yurkowski |
author_facet |
Matthew Fuirst Kyle H. Elliott Steven H. Ferguson Aaron T. Fisk Les N. Harris Kevin J. Hedges Kevin B. Jacobs Kelsey F. Johnson Tracey N. Loewen Cory J. D. Matthews C.J. Mundy Andrea Niemi Wesley R. Ogloff Cortney A. Watt David J. Yurkowski |
author_sort |
Matthew Fuirst |
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 |
2024 |
url |
https://doi.org/10.1139/as-2023-0027 https://doaj.org/article/720268b068c04072912c7ecf5d16aa5e |
genre |
Arctic Climate change Hudson Bay Southampton Island |
genre_facet |
Arctic Climate change Hudson Bay Southampton Island |
op_source |
Arctic Science, Vol 10, Iss 1, Pp 34-47 (2024) |
op_relation |
https://cdnsciencepub.com/doi/10.1139/as-2023-0027 https://doaj.org/toc/2368-7460 doi:10.1139/as-2023-0027 2368-7460 https://doaj.org/article/720268b068c04072912c7ecf5d16aa5e |
op_doi |
https://doi.org/10.1139/as-2023-0027 |
container_title |
Arctic Science |
_version_ |
1810292239026356224 |