Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators
Individual specialization (IS), where individuals within populations irrespective of age, sex, and body size are either specialized or generalized in terms of resource use, has implications on ecological niches and food web structure. Niche size and degree of IS of near-top trophic-level marine pred...
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Online Access: | http://hdl.handle.net/10255/dryad.106967 https://doi.org/10.5061/dryad.4j8j2 |
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ftdryad:oai:v1.datadryad.org:10255/dryad.106967 2023-05-15T14:26:39+02:00 Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators Yurkowski, David J. Ferguson, Steve Choy, Emily S. Loseto, Lisa L. Brown, Tanya M. Muir, Derek C. G. Semeniuk, Christina A. D. Fisk, Aaron T. Resolute Bay Ulukhaktok Paulatuk Hendrickson Island Pangnirtung Chesterfield Inlet Saglek Bay 1986-2012 2016-02-17T17:44:41Z http://hdl.handle.net/10255/dryad.106967 https://doi.org/10.5061/dryad.4j8j2 unknown doi:10.5061/dryad.4j8j2/1 doi:10.1002/ece3.1980 PMID:26909143 doi:10.5061/dryad.4j8j2 Yurkowski DJ, Ferguson S, Choy ES, Loseto LL, Brown TM, Muir DCG, Semeniuk CAD, Fisk AT (2016) Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators. Ecology and Evolution 6(6): 1666–1678. http://hdl.handle.net/10255/dryad.106967 Stable isotopes beluga whales ringed seals individual specialization Article 2016 ftdryad https://doi.org/10.5061/dryad.4j8j2 https://doi.org/10.5061/dryad.4j8j2/1 https://doi.org/10.1002/ece3.1980 2020-01-01T15:29:46Z Individual specialization (IS), where individuals within populations irrespective of age, sex, and body size are either specialized or generalized in terms of resource use, has implications on ecological niches and food web structure. Niche size and degree of IS of near-top trophic-level marine predators have been little studied in polar regions or with latitude. We quantified the large-scale latitudinal variation of population- and individual-level niche size and IS in ringed seals (Pusa hispida) and beluga whales (Delphinapterus leucas) using stable carbon and nitrogen isotope analysis on 379 paired ringed seal liver and muscle samples and 124 paired beluga skin and muscle samples from eight locations ranging from the low to high Arctic. We characterized both within- and between-individual variation in predator niche size at each location as well as accounting for spatial differences in the isotopic ranges of potential prey. Total isotopic niche width (TINW) for populations of ringed seals and beluga decreased with increasing latitude. Higher TINW values were associated with greater ecological opportunity (i.e., prey diversity) in the prey fish community which mainly consists of Capelin (Mallotus villosus) and Sand lance (Ammodytes sp.) at lower latitudes and Arctic cod (Boreogadus saida) at high latitudes. In beluga, their dietary consistency between tissues also known as the within-individual component (WIC) increased in a near 1:1 ratio with TINW (slope = 0.84), suggesting dietary generalization, whereas the slope (0.18) of WIC relative to TINW in ringed seals indicated a high degree of individual specialization in ringed seal populations with higher TINWs. Our findings highlight the differences in TINW and level of IS for ringed seals and beluga relative to latitude as a likely response to large-scale spatial variation in ecological opportunity, suggesting species-specific variation in dietary plasticity to spatial differences in prey resources and environmental conditions in a rapidly changing ecosystem. Article in Journal/Newspaper Arctic Arctic cod Arctic Beluga Beluga* Boreogadus saida Chesterfield Inlet Delphinapterus leucas Paulatuk Pusa hispida Resolute Bay ringed seal Ulukhaktok Dryad Digital Repository (Duke University) Arctic Resolute Bay ENVELOPE(-94.842,-94.842,74.677,74.677) Pangnirtung ENVELOPE(-65.707,-65.707,66.145,66.145) Ulukhaktok ENVELOPE(-117.772,-117.772,70.736,70.736) Chesterfield Inlet ENVELOPE(-90.705,-90.705,63.342,63.342) Paulatuk ENVELOPE(-123.985,-123.985,69.325,69.325) Saglek Bay ENVELOPE(-62.583,-62.583,58.333,58.333) Hendrickson Island ENVELOPE(-133.589,-133.589,69.500,69.500) |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Stable isotopes beluga whales ringed seals individual specialization |
spellingShingle |
Stable isotopes beluga whales ringed seals individual specialization Yurkowski, David J. Ferguson, Steve Choy, Emily S. Loseto, Lisa L. Brown, Tanya M. Muir, Derek C. G. Semeniuk, Christina A. D. Fisk, Aaron T. Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators |
topic_facet |
Stable isotopes beluga whales ringed seals individual specialization |
description |
Individual specialization (IS), where individuals within populations irrespective of age, sex, and body size are either specialized or generalized in terms of resource use, has implications on ecological niches and food web structure. Niche size and degree of IS of near-top trophic-level marine predators have been little studied in polar regions or with latitude. We quantified the large-scale latitudinal variation of population- and individual-level niche size and IS in ringed seals (Pusa hispida) and beluga whales (Delphinapterus leucas) using stable carbon and nitrogen isotope analysis on 379 paired ringed seal liver and muscle samples and 124 paired beluga skin and muscle samples from eight locations ranging from the low to high Arctic. We characterized both within- and between-individual variation in predator niche size at each location as well as accounting for spatial differences in the isotopic ranges of potential prey. Total isotopic niche width (TINW) for populations of ringed seals and beluga decreased with increasing latitude. Higher TINW values were associated with greater ecological opportunity (i.e., prey diversity) in the prey fish community which mainly consists of Capelin (Mallotus villosus) and Sand lance (Ammodytes sp.) at lower latitudes and Arctic cod (Boreogadus saida) at high latitudes. In beluga, their dietary consistency between tissues also known as the within-individual component (WIC) increased in a near 1:1 ratio with TINW (slope = 0.84), suggesting dietary generalization, whereas the slope (0.18) of WIC relative to TINW in ringed seals indicated a high degree of individual specialization in ringed seal populations with higher TINWs. Our findings highlight the differences in TINW and level of IS for ringed seals and beluga relative to latitude as a likely response to large-scale spatial variation in ecological opportunity, suggesting species-specific variation in dietary plasticity to spatial differences in prey resources and environmental conditions in a rapidly changing ecosystem. |
format |
Article in Journal/Newspaper |
author |
Yurkowski, David J. Ferguson, Steve Choy, Emily S. Loseto, Lisa L. Brown, Tanya M. Muir, Derek C. G. Semeniuk, Christina A. D. Fisk, Aaron T. |
author_facet |
Yurkowski, David J. Ferguson, Steve Choy, Emily S. Loseto, Lisa L. Brown, Tanya M. Muir, Derek C. G. Semeniuk, Christina A. D. Fisk, Aaron T. |
author_sort |
Yurkowski, David J. |
title |
Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators |
title_short |
Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators |
title_full |
Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators |
title_fullStr |
Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators |
title_full_unstemmed |
Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators |
title_sort |
data from: latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of arctic marine predators |
publishDate |
2016 |
url |
http://hdl.handle.net/10255/dryad.106967 https://doi.org/10.5061/dryad.4j8j2 |
op_coverage |
Resolute Bay Ulukhaktok Paulatuk Hendrickson Island Pangnirtung Chesterfield Inlet Saglek Bay 1986-2012 |
long_lat |
ENVELOPE(-94.842,-94.842,74.677,74.677) ENVELOPE(-65.707,-65.707,66.145,66.145) ENVELOPE(-117.772,-117.772,70.736,70.736) ENVELOPE(-90.705,-90.705,63.342,63.342) ENVELOPE(-123.985,-123.985,69.325,69.325) ENVELOPE(-62.583,-62.583,58.333,58.333) ENVELOPE(-133.589,-133.589,69.500,69.500) |
geographic |
Arctic Resolute Bay Pangnirtung Ulukhaktok Chesterfield Inlet Paulatuk Saglek Bay Hendrickson Island |
geographic_facet |
Arctic Resolute Bay Pangnirtung Ulukhaktok Chesterfield Inlet Paulatuk Saglek Bay Hendrickson Island |
genre |
Arctic Arctic cod Arctic Beluga Beluga* Boreogadus saida Chesterfield Inlet Delphinapterus leucas Paulatuk Pusa hispida Resolute Bay ringed seal Ulukhaktok |
genre_facet |
Arctic Arctic cod Arctic Beluga Beluga* Boreogadus saida Chesterfield Inlet Delphinapterus leucas Paulatuk Pusa hispida Resolute Bay ringed seal Ulukhaktok |
op_relation |
doi:10.5061/dryad.4j8j2/1 doi:10.1002/ece3.1980 PMID:26909143 doi:10.5061/dryad.4j8j2 Yurkowski DJ, Ferguson S, Choy ES, Loseto LL, Brown TM, Muir DCG, Semeniuk CAD, Fisk AT (2016) Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators. Ecology and Evolution 6(6): 1666–1678. http://hdl.handle.net/10255/dryad.106967 |
op_doi |
https://doi.org/10.5061/dryad.4j8j2 https://doi.org/10.5061/dryad.4j8j2/1 https://doi.org/10.1002/ece3.1980 |
_version_ |
1766299922069454848 |