Linking Inuit and scientific knowledge in coastal marine research: Advancing our understanding of Greenland cod (Gadus ogac) near Ulukhaktok, Northwest Territories under a changing climate DOI Open Access
Stephanie Chan

Published: Jan. 1, 2024

The Arctic is warming at an unprecedented rate, with implications for the marine ecosystem and species that are important tradition, culture, livelihoods of Indigenous people. Inuit in western Canadian have identified a need to better understand impacts changing climate on coastal subsistence. Greenland cod, ogac, (Gadus ogac) found reportedly experiencing changes population dynamics recent years. In this thesis, I present findings from scientific knowledge cod as means linking systems advance our understanding discuss under environment. objectives research were to: (1) investigate adaptation potential (2) document species, (3) examine cumulative shifting resources Inuvialuit Settlement Region. measured individual specialization-generalization morphological habitat-trophic traits collected along coast near Ulukhaktok, Northwest Territories, NT, Arctic. then used information elicit discussion their morphology, feeding, movement behaviour key holders Ulukhaktok. Scientific project suggest overall generalists but display range feeding behaviours two morphotypes. These highlight importance maintaining trait variation conserve biodiversity while promoting resilience wild fish populations. able build rationale some phenomena observed identify early signs change. Linking was two-way process which built off one another inform next steps interpret more holistically. baseline ecology intend design future using generate enriched findings. gained lessons learned study can serve tool establishing additional conservation efforts may be required ensure sustained continue support subsistence livelihoods.

Language: Английский

Recruitment regime shifts and nonstationarity are widespread phenomena in harvestable stocks experiencing pronounced climate fluctuations DOI Creative Commons
Shuyang Ma, Geir Huse, Kotaro Ono

et al.

Fish and Fisheries, Journal Year: 2023, Volume and Issue: 25(2), P. 320 - 348

Published: Dec. 19, 2023

Abstract Methods to reliably identify jump discontinuities in biological time series and assess the specific contribution of various covariates are rapidly progressing. Here, we took advantage these statistical improvements as well those seen complementary, down‐scaled climate biogeochemical models investigate causes substantial interannual variability observed recruitment strength hindcast analyses. This systematic meta‐analysis included 23 data‐rich, commercially valuable, warm‐ cold‐temperate stocks North, Norwegian Barents Seas. Since this study focuses on variability, have used term “recruitment regime shift” distinguish from concept ecosystem shift. The breakpoint analysis revealed that former criterion applied more than half series, mainly with respect North Sea but also Sea. exploratory using vcGAM indicated 1–3 shifts per stock were real, when five drivers spanning spawning biomass large‐scale climatic processes. Thus, non‐stationary relationships extensively prevalent, indicating each is uniquely adapted its locally varying conditions. Outputs stationary GAM resembled not after threshold year. In‐depth case studies showed proxy a given driver for process which was be should critically considered spatiotemporal context. Furthermore, stock‐specific uncertainty associated figures such an in‐built component model construct thereby evaluation output.

Language: Английский

Citations

8
Borealization impacts shelf ecosystems across the Arctic DOI Creative Commons
Bérengère Husson, Bodil A. Bluhm, Frédéric Cyr

et al.

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

Published: Oct. 24, 2024

Climate change is rapidly modifying biodiversity across the Arctic, driving a shift from Arctic to more boreal ecosystem characteristics. This phenomenon, known as borealization, mainly described for certain functional groups along sub-Arctic inflow shelves (Barents and Chukchi Seas). In this review, we evaluate spatial extent of such alterations well their effects on ecosystem-level processes risks. Along shelves, borealization driven by long-term strengthened increasingly warm waters south punctuated advection low sea ice extreme events. A growing body literature also points an emerging other shelf ecosystems, through “spillover” effect, local changes in environmental conditions enable movement or transport new species shelves. These modifications are leading groups, although many uncertainties remain regarding under-sampled microbes, technical challenges consistent, regular monitoring regions. There clear consensus that affecting phenology, composition, community traits, population structure essential habitats, interactions, resilience. Non-dynamic factors, depth photoperiod, thought limit complete system, may lead intermediate, “hybrid” ecosystems future. We expect current borders progress further northward ultimately reach equilibrium state with seasonal borealization. Risks system difficult estimate, adaptive capacities poorly understood. However, ice-associated clearly most at risk, some might find temporary refuge areas slower rate change. discuss likely character future highlight uncertainties. Those have implications communities potential support Blue Growth Arctic. Addressing these issues necessary assess full scale climate impacts human mitigation adaptation strategies.

Language: Английский

Citations

1
Decadal (2010–2019) variability in the marine ecosystems of the North Atlantic DOI Creative Commons
C. González‐Pola, Katherine E. Mills, Agnieszka Beszczyńska-Möller

et al.

ICES Journal of Marine Science, Journal Year: 2024, Volume and Issue: 81(3), P. 505 - 511

Published: March 8, 2024

Abstract The “Symposium on Decadal Variability of the North Atlantic and its Marine Ecosystems: 2010–2019” took place in Bergen, Norway, from 20 to 22 May 2022. This event, hosted by Institute Research, was jointly sponsored ICES NAFO constitutes fourth a series these symposia that started 1991. first symposium’s aim review hydrobiological variability decade 1980s, addressing physical environment, plankton, invertebrates, fish. Subsequent maintained classical structure, whilst new theme session covering social sciences added programme 2022 edition. Studies climate impacts marine ecosystems living resources, including trends regime shifts, emerged increasingly longer ecosystem time across subarctic regions. symposium collection presents key findings discussed during symposium. Whilst some progress has been made advancing our ability understand patterns change physical, fish communities, more work is needed integrate physical-ecological processes scales with science.

Language: Английский

Citations

0
The combined effects of warming, ocean acidification, and fishing on the northeast Atlantic cod (Gadus morhua) in the Barents Sea DOI Creative Commons
Cecilie Hansen, Solfrid Sætre Hjøllo, Morten D. Skogen

et al.

ICES Journal of Marine Science, Journal Year: 2024, Volume and Issue: 81(5), P. 877 - 886

Published: April 12, 2024

Abstract With a biomass of ∼4 million tonnes, and annual catches 900 000 the northeast Atlantic (NEA) cod stock in Barents Sea is world’s largest. Scientists have been trying to explain variability recruitment this for over 100 years, particular connecting it spawning environmental factors such as temperature. It has suggested that combination ocean acidification global warming will lead significant decrease an eventual (end century) collapse NEA Sea. We show temperature- OA-driven decline recruits likely smaller stock, but not collapse. Instead, level fishing pressure and, least, choice function applied simulations how relates temperature, extremely important when making forecasts. Applying non-linear relationship between temperature biomass—as done studies predict stock—does improve accuracy addition, adds large number biologically supported.

Language: Английский

Citations

0
Linking Inuit and scientific knowledge in coastal marine research: Advancing our understanding of Greenland cod (Gadus ogac) near Ulukhaktok, Northwest Territories under a changing climate DOI Open Access
Stephanie Chan

Published: Jan. 1, 2024

The Arctic is warming at an unprecedented rate, with implications for the marine ecosystem and species that are important tradition, culture, livelihoods of Indigenous people. Inuit in western Canadian have identified a need to better understand impacts changing climate on coastal subsistence. Greenland cod, ogac, (Gadus ogac) found reportedly experiencing changes population dynamics recent years. In this thesis, I present findings from scientific knowledge cod as means linking systems advance our understanding discuss under environment. objectives research were to: (1) investigate adaptation potential (2) document species, (3) examine cumulative shifting resources Inuvialuit Settlement Region. measured individual specialization-generalization morphological habitat-trophic traits collected along coast near Ulukhaktok, Northwest Territories, NT, Arctic. then used information elicit discussion their morphology, feeding, movement behaviour key holders Ulukhaktok. Scientific project suggest overall generalists but display range feeding behaviours two morphotypes. These highlight importance maintaining trait variation conserve biodiversity while promoting resilience wild fish populations. able build rationale some phenomena observed identify early signs change. Linking was two-way process which built off one another inform next steps interpret more holistically. baseline ecology intend design future using generate enriched findings. gained lessons learned study can serve tool establishing additional conservation efforts may be required ensure sustained continue support subsistence livelihoods.

Language: Английский

Citations

0