A review of climate change impacts on migration patterns of marine vertebrates in Arctic and Subarctic ecosystems

Frontiers in Environmental Science, Journal Year: 2024, Volume and Issue: 12

Published: Oct. 25, 2024

Climate change is impacting marine ecosystems throughout the circumpolar Arctic, altering seasonal habitats and food bases for fishes, seabirds, mammals. Arctic Subarctic regions provide resources resident species that migrate to north from more southerly regions. Changes in northerly latitudes thus impact endemic as well non-endemic animals. Herein, we review what known about climate-driven changes migration patterns of vertebrates, including: 1) residents with movements – those mammals complete their entire life cycle within but exhibit movements; 2) Breeding migrants many seabirds enter breed subsequently south fall; 3) Summer visitors feeding certain boreal arrive during northern summer feed on abundant prey though they elsewhere. Migratory are often driven by timing extent sea ice, which defines suitable habitat some animals limits access open water others. Longer open-water seasons, warmer ocean temperatures, stronger winds have resulted earlier production blooms spring often, extended open-ocean plankton into late summer, resulting altered types distributions. A common thread among taxa shifts distribution migrating indicate traveling farther north, or shifting longitudinally, migrations occurring over longer time frames. Species performing multiple lifetime long-distance may need adjust routing iteratively match productivity. Altered animal distributions phenology, reduced affects critical nutritional, economical, cultural components Indigenous people’s lives Arctic. Ongoing challenge resilience adaptability people ecosystems, will require adaptive research management approaches.

Language: Английский

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Improving nutritional intakes and reducing metal(loid) exposures from wild fish broth among Inuit pregnant women

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: unknown, P. 178558 - 178558

Published: Feb. 1, 2025

Recipes made with local country foods are central to Inuit culture and nutrition. recommended for their different health benefits, such as a wild fish broth recipe that is said help the baby's growth during pregnancy lactation. However, some can have high concentrations of potentially toxic metal(loid)s mercury (Hg), arsenic (As) or cadmium (Cd), it unknown what extent these transferred broth. During pregnancy, there higher risks developing iron (Fe) calcium (Ca) deficiencies. A simple way optimize nutrient content recipes by adding other ingredients like seaweed, bivalves (mussels clams) Lucky Iron Fish® known be rich in nutrients. Using an experimental approach, (essential elements fatty acids) metal(loid) transfer were studied measuring Most fish, seaweeds important sources (>20 % daily intakes) nutrients required healthy pregnancies. Several ingredients, but only was source The Fish potential when preconditioned. Total Hg elevated lake trout muscles cheeks (up 4.5 μg/g ww; >90 methylated form) not concern species. Few broth, except (As). As raw most broths, less organic forms mainly found. Overall, broths relatively low metal(loid)s. Adding seaweed could increase intake from if consumed whole.

Language: Английский

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Toxoplasma gondii DNA in Tissues of Anadromous Arctic Charr, Salvelinus alpinus, Collected From Nunavik, Québec, Canada

Zoonoses and Public Health, Journal Year: 2024, Volume and Issue: 71(8), P. 933 - 941

Published: Sept. 9, 2024

Toxoplasma gondii is a very common zoonotic parasite in humans and animals worldwide. Human seroprevalence high some regions of Canada's North thought to be associated with the consumption traditionally prepared country foods, such as caribou, walrus, ringed seal beluga. While numerous studies have reported on prevalence T. these animals, general absence felid definitive hosts there has been considerable debate regarding source infection, particularly marine mammals. It proposed that fish could involved this transmission.

Language: Английский

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You are the colour of what you eat: higher invertebrate consumption correlates with redder muscle pigmentation in anadromous Arctic char (Salvelinus alpinus) along western Hudson Bay, Nunavut, Canada

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Salmonid fishes exhibit marked intra-specific variation in muscle pigmentation. This is primarily due to individual differences the accumulation and assimilation of dietary carotenoids synthesized by primary producers microorganisms present tissues crustaceans that can serve as important prey for salmonids. Despite anadromous Arctic char (Salvelinus alpinus) being a key subsistence economic resource across Inuit Nunangat, their pigmentation relation diet environmental variability (e.g., sea ice dynamics) has not been investigated. Using carotenoid spectrophotometry analysis colour scale, we examined influence diet, inferred from stomach contents, stable isotopes (δ¹⁵N), highly branched isoprenoids on pigmentation, well near communities Rankin Inlet Naujaat, Nunavut two years (2021, 2022) with contrasting cover. Among types, invertebrates had higher concentrations than fishes. Naujaat contained redder 2021, associated invertebrate-based more prevalent In 2022, were similar, largely fish-based similar cover, although still remained char. Inter-annual concentration observed this species may affect local users over long-term unpredictable climate-driven changes, resulting socioeconomic impacts Arctic.

Language: Английский

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