scholarly journals Abrupt Climate Changes and Emerging Ice-Ocean Processes in the Pacific Arctic Region and the Bering Sea

2014 ◽  
pp. 65-99 ◽  
Author(s):  
Jia Wang ◽  
Hajo Eicken ◽  
Yanling Yu ◽  
Xuezhi Bai ◽  
Jinlun Zhang ◽  
...  
Keyword(s):  
Bering Sea ◽  
Climate Changes ◽  
Arctic Region ◽  
The Pacific ◽  
The Bering Sea ◽  
Ocean Processes

scholarly journals Impact of a warm anomaly in the Pacific Arctic region derived from time-series export fluxes

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0255837
Author(s):  
Catherine Lalande ◽  
Jacqueline M. Grebmeier ◽  
Andrew M. P. McDonnell ◽  
Russell R. Hopcroft ◽  
Stephanie O’Daly ◽  
...  
Keyword(s):  
Sea Ice ◽  
Bering Sea ◽  
Chukchi Sea ◽  
Arctic Region ◽  
Ice Cover ◽  
Biological Pump ◽  
Northern Bering Sea ◽  
Pacific Waters ◽  
The Pacific ◽  
The Impact

Unusually warm conditions recently observed in the Pacific Arctic region included a dramatic loss of sea ice cover and an enhanced inflow of warmer Pacific-derived waters. Moored sediment traps deployed at three biological hotspots of the Distributed Biological Observatory (DBO) during this anomalously warm period collected sinking particles nearly continuously from June 2017 to July 2019 in the northern Bering Sea (DBO2) and in the southern Chukchi Sea (DBO3), and from August 2018 to July 2019 in the northern Chukchi Sea (DBO4). Fluxes of living algal cells, chlorophyll a (chl a), total particulate matter (TPM), particulate organic carbon (POC), and zooplankton fecal pellets, along with zooplankton and meroplankton collected in the traps, were used to evaluate spatial and temporal variations in the development and composition of the phytoplankton and zooplankton communities in relation to sea ice cover and water temperature. The unprecedented sea ice loss of 2018 in the northern Bering Sea led to the export of a large bloom dominated by the exclusively pelagic diatoms Chaetoceros spp. at DBO2. Despite this intense bloom, early sea ice breakup resulted in shorter periods of enhanced chl a and diatom fluxes at all DBO sites, suggesting a weaker biological pump under reduced ice cover in the Pacific Arctic region, while the coincident increase or decrease in TPM and POC fluxes likely reflected variations in resuspension events. Meanwhile, the highest transport of warm Pacific waters during 2017–2018 led to a dominance of the small copepods Pseudocalanus at all sites. Whereas the export of ice-associated diatoms during 2019 suggested a return to more typical conditions in the northern Bering Sea, the impact on copepods persisted under the continuously enhanced transport of warm Pacific waters. Regardless, the biological pump remained strong on the shallow Pacific Arctic shelves.

scholarly journals Comparison of the Far-Eastern Seas and North-West Pacific by integral characteristics of pelagic and benthic trawled macrofaun

2014 ◽  
Vol 178 (3) ◽  
pp. 58-67
Author(s):  
Igor V. Volvenko
Keyword(s):  
Bering Sea ◽  
Large Scale ◽  
North West ◽  
The Pacific ◽  
Integral Characteristics ◽  
The Pacific Ocean ◽  
Far Eastern ◽  
Far Eastern Seas ◽  
The Bering Sea

The Bering Sea, ​​Okhotsk Sea, Japan/East Sea and adjacent waters of the Pacific Ocean (mainly within EEZ of Russia) are compared by abundance of pelagic and benthic macrofauna, its species richness, evenness, diversity, and mean weight of animals using the data of long-term large-scale pelagic and bottom trawl surveys conducted by Pacific Fish. Res. Center (TINRO) in 1977-2010.

scholarly journals Feeding of smoothtongue Leuroglossus schmidti in the Bering, Okhotsk Seas and adjacent waters of the Pacific Ocean

2016 ◽  
Vol 184 (1) ◽  
pp. 150-157
Author(s):  
Alexander Ya. Efimkin
Keyword(s):  
Bering Sea ◽  
Mesopelagic Fish ◽  
The North ◽  
Important Prey ◽  
The Pacific ◽  
Upper Epipelagic Layer ◽  
The Pacific Ocean ◽  
The North Pacific ◽  
Epipelagic Layer ◽  
The Bering Sea

Smoothtongue Leuroglossus schmidti is a small mesopelagic fish species common for subarctic waters. It rises to the upper epipelagic layer at night for feeding and preys mainly on euphausiids, copepods and amphipods. Its mean index of stomach fullness reaches 68 ‱ in the epipelagic layer, but it almost doesn’t feed deeper than 200 m, judging by a little food in the stomach. In the Bering Sea, euphausiids dominate in its diet and the portion of copepods is small. In the ​​Okhotsk Sea, each of these two groups provides a half of the diet. In the North Pacific, the portion of copepods is 63 % on average, euphausiids are the second important prey, and amphipods occur in the diet occasionally. Daily ration of smoothtongue is about 1.4 %.

scholarly journals Feeding of adult sea bream Brama japonica in the Pacific Ocean and the Bering Sea

2014 ◽  
Vol 176 (1) ◽  
pp. 210-215
Author(s):  
Alexander Ya. Efimkin
Keyword(s):  
Bering Sea ◽  
Feeding Habits ◽  
Sea Bream ◽  
Daily Ration ◽  
The North ◽  
The Pacific ◽  
The Pacific Ocean ◽  
High Concentrations ◽  
The North Pacific ◽  
The Bering Sea

Feeding habits of adult sea bream are considered on the samples collected in the North Pacific and Bering Sea in the last several years. This species is a predator with the diet highly dependent on its habitat and composition of prey (small-sized fish and squids). It has two or three peaks of consumption daily, which change seasonally and year-to-year; anyway, the morning (3-6 a.m.) is usually the time of the lowest consumption, at least in summer and autumn, and the daytime is the normal time for feeding. The sea bream does not eat zooplankton usually, but Euphausia pacifica was a significant portion of its diet (34 %) in the southern part of surveyed area in the summer of 2009, possibly because of high concentrations of euphausiids in that area. Daily ration of adult sea bream is 2.5-3.5 % of its body weight.

Observations on the Reproduction of Modiolus Modiolus in Isle of Man Waters

1989 ◽  
Vol 69 (2) ◽  
pp. 373-385 ◽  
Author(s):  
A.K. Jasim ◽  
A.R. Brand
Keyword(s):  
North Carolina ◽  
Bering Sea ◽  
East Coast ◽  
White Sea ◽  
Rock Pools ◽  
Modiolus Modiolus ◽  
Coastal Marine ◽  
The Pacific ◽  
Horse Mussel ◽  
The Bering Sea

The horse-mussel Modiolus modiolus (L.) is a bivalve molluse inhabiting coastal marine environments down to about 200 m, where it may occur in very large communities (Wiborg, 1946; Tebble, 1966; Comely, 1978). It can also be found low in the intertidal zone where it lives in rock pools or in the hold-fasts of Laminaria (Wilson, 1977; Davenport & Kjørsvik, 1982). It is a boreal species. In the Atlantic it ranges from the White Sea to the Bay of Biscay, off Iceland, the Faroes and down the east coast of North America to North Carolina. In the Pacific it occurs from the Bering Sea to Japan and California (Wiborg, 1946). Comparatively little work has been done on Modiolus modiolus, probably because it is of little commercial importance and lives predominantly subtidally in relatively inaccessible environments.

Archaeology of the Eastern Aleut Region

2016 ◽  
Author(s):  
Herbert Maschner
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Arctic Region ◽  
The Arctic ◽  
Human Populations ◽  
Key Factors ◽  
The Pacific ◽  
Marine Productivity ◽  
The One ◽  
The Arctic Region

The prehistory of the eastern Aleut region is one of the most convoluted and dynamic cultural trajectories in the Arctic region. Situated on the one of the world’s most productive fisheries, it is on the hinge point between the often-violent North Pacific and Bering Sea climate regimes. The richest marinescapes in the Pacific region gave rise to the largest human populations, the largest villages, and the most socially complex organizations in the Eskimo-Aleut world. But these villages rose and fell, and even the largest were subject to periodic cultural collapse. Climate, marine productivity, and boating technology are the key factors in understanding the archaeology of this part of Alaska.

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