Bottom trawl surveys in the northern Bering Sea indicate recent shifts in the distribution of marine species

Stevenson, Duane E.; Lauth, Robert Russell

doi:10.1007/s00300-018-2431-1

Cited by 158 publications

(103 citation statements)

References 38 publications

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“…The seabird response to these conditions reflected that impact. Despite response similarities, we caution that (1) long‐term effects remain unknown and (2) other trophic responses of the NBS are unique, such as northward shifting adult fish populations (Stevenson & Lauth, ). While the SEBS can be an example for the NBS, it is not conclusive that all responses will be similar.…”

Section: Discussionmentioning

confidence: 98%

Responses of the Northern Bering Sea and Southeastern Bering Sea Pelagic Ecosystems Following Record‐Breaking Low Winter Sea Ice

Duffy‐Anderson

Stabeno

Andrews

et al. 2019

Geophysical Research Letters

105

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Bering Sea sea ice during winter 2017–2018 was the lowest ever recorded. Ecosystem effects of low ice have been observed in the southeastern Bering Sea, but never in the northern Bering Sea. Observations in both systems included weakened water column stratification, delayed spring bloom, and low abundances of large crustacean zooplankton. Summer Cold Pool presence was extremely limited. Young walleye pollock production and condition were similar to prior warm years, though catches of other pelagic forage fishes were low. Summer seabird die‐offs were observed in the northern Bering Sea, and to lesser extent in the southeastern Bering Sea, and reproductive success was poor at monitored colonies. Selected bottom‐up responses to lack of sea ice in the north were similar to those in the south, potentially providing environmental indicators to project ecosystem effects in a lesser studied system. Results offer a potential glimpse of the broader Bering Sea pelagic ecosystem under future low‐ice projections.

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Section: Discussionmentioning

confidence: 98%

Responses of the Northern Bering Sea and Southeastern Bering Sea Pelagic Ecosystems Following Record‐Breaking Low Winter Sea Ice

Duffy‐Anderson

Stabeno

Andrews

et al. 2019

Geophysical Research Letters

105

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“…Further, surveys indicated very low abundance of Pacific cod in the NBS prior to 2010. The length–frequency distribution of cod collected in the NBS was also similar to that of the EBS population, although slightly larger (Stevenson & Lauth, ), which could be due to better feeding conditions or if cod preferentially undertake more distant summer migrations as they grow.…”

Section: Discussionmentioning

confidence: 99%

Genetic evidence of a northward range expansion in the eastern Bering Sea stock of Pacific cod

Spies

Gruenthal

Drinan

et al. 2019

Evolutionary Applications

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Poleward species range shifts have been predicted to result from climate change, and many observations have confirmed such movement. Poleward shifts may represent a homogeneous shift in distribution, seasonal northward movement of specific populations, or colonization processes at the poleward edge of the distribution. The ecosystem of the Bering Sea has been changing along with the climate, moving from an arctic to a subarctic system. Several fish species have been observed farther north than previously reported and in increasing abundances. We examined one of these fish species, Pacific cod, in the northern Bering Sea (NBS) to assess whether they migrated from another stock in the eastern Bering Sea (EBS), Gulf of Alaska, or Aleutian Islands, or whether they represent a separate population. Genetic analyses using 3,599 single nucleotide polymorphism markers indicated that nonspawning cod collected in August 2017 in the NBS were similar to spawning stocks of cod in the EBS.This result suggests escalating northward movement of the large EBS stock during summer months. Whether the cod observed in the NBS migrate south during winter to spawn or remain in the NBS as a sink population is unknown.

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“…However, the management system is yet untested against the unidirectional and potentially large changes anticipated under climate change. Indeed, recent and extreme warming and loss of sea ice in the Eastern Bering Sea (especially during recent unprecedented multiyear marine heatwaves between 2014 and 2019) has led to the rapid poleward redistribution of Pacific cod and declines in recruitment and productivity of several groundfish species 24 – 26 . Observed recent warming, sea ice loss, and biophysical responses in the Bering Sea 27 , 28 are consistent with previous projections of impacts of climate change, yet were not anticipated to manifest until mid-century 29 .…”

Section: Introductionmentioning

confidence: 99%

Ecosystem-based fisheries management forestalls climate-driven collapse

et al. 2020

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Climate change is impacting fisheries worldwide with uncertain outcomes for food and nutritional security. Using management strategy evaluations for key US fisheries in the eastern Bering Sea we find that Ecosystem Based Fisheries Management (EBFM) measures forestall future declines under climate change over non-EBFM approaches. Yet, benefits are species-specific and decrease markedly after 2050. Under high-baseline carbon emission scenarios (RCP 8.5), end-of-century (2075–2100) pollock and Pacific cod fisheries collapse in >70% and >35% of all simulations, respectively. Our analysis suggests that 2.1–2.3 °C (modeled summer bottom temperature) is a tipping point of rapid decline in gadid biomass and catch. Multiyear stanzas above 2.1 °C become commonplace in projections from ~2030 onward, with higher agreement under RCP 8.5 than simulations with moderate carbon mitigation (i.e., RCP 4.5). We find that EBFM ameliorates climate change impacts on fisheries in the near-term, but long-term EBFM benefits are limited by the magnitude of anticipated change.

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Bottom trawl surveys in the northern Bering Sea indicate recent shifts in the distribution of marine species

Cited by 158 publications

References 38 publications

Responses of the Northern Bering Sea and Southeastern Bering Sea Pelagic Ecosystems Following Record‐Breaking Low Winter Sea Ice

Responses of the Northern Bering Sea and Southeastern Bering Sea Pelagic Ecosystems Following Record‐Breaking Low Winter Sea Ice

Genetic evidence of a northward range expansion in the eastern Bering Sea stock of Pacific cod

Ecosystem-based fisheries management forestalls climate-driven collapse

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