scholarly journals Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343)

2020 ◽  
Vol 268 ◽  
pp. 1-21 ◽  
Author(s):  
Henrieka Detlef ◽  
Sindia M. Sosdian ◽  
Sev Kender ◽  
Caroline H. Lear ◽  
Ian R. Hall
Keyword(s):  
Elemental Composition ◽  
Continental Margin ◽  
Bering Sea ◽  
Benthic Foraminifera ◽  
Authigenic Carbonates ◽  
Eastern Bering Sea ◽  
Discovery Program ◽  
International Ocean Discovery Program

scholarly journals Patterns in groundfish abundance along the Eastern Bering Sea outer continental margin

2013 ◽  
Vol 70 (6) ◽  
pp. 1181-1197 ◽  
Author(s):  
Laura A. Wigand ◽  
Terrie Klinger ◽  
Miles G. Logsdon
Keyword(s):  
Spatial Pattern ◽  
Continental Margin ◽  
Bering Sea ◽  
Local Ecological Knowledge ◽  
Environmental Data ◽  
Ecological Knowledge ◽  
Trawl Survey ◽  
Spatial Pattern Analysis ◽  
Catch Per Unit Effort ◽  
Eastern Bering Sea

Abstract Wigand, L. A., Klinger, T., and Logsdon, M. G. 2013. Patterns in groundfish abundance along the Eastern Bering Sea outer continental margin. – ICES Journal of Marine Science, 70: 1181–1197. Place-based management approaches require understanding the spatial arrangement and interaction of elements. To address this need, we explored the utility of spatial-pattern analysis to understand the distribution of groundfish in the Eastern Bering Sea outer continental margin. We divided this region into discrete geomorphological units to explore spatial pattern on a range of scales. We used groundfish catch per unit effort (cpue) trawl survey data collected in four years to quantify spatial autocorrelation. Global statistics indicated that groundfish cpue was dominated by clusters of low values in all years. Local statistics showed that clusters of low values in groundfish cpue were confined to the southern portion of the study area, while clusters of high values varied across the study area. Outliers were most commonly found in close proximity to the shelf–slope break. Our results reveal the existence of spatial dependency in groundfish abundance and demonstrate that spatial analysis can be used to better understand spatial arrangements of these and other living marine resources, and to quantify and validate the local ecological knowledge of resource users. Our results indicate the feasibility of using spatially explicit tools to improve integration and visualization of marine environmental data for purposes of management and conservation.

EUSTATIC AND TECTONIC CONTROLS ON SHAPING THE BERINGIAN CONTINENTAL MARGIN, BERING SEA, USA

2020 ◽  
Author(s):  
Matthew Malkowski ◽  
◽  
Aaron T. Steelquist ◽  
Ginger Barth ◽  
Daniel S. Scheirer ◽  
...  
Keyword(s):  
Continental Margin ◽  
Bering Sea

The physiological adaptations and toxin profiles of the toxic Alexandrium fundyense on the eastern Bering Sea and Chukchi Sea shelves

Harmful Algae ◽  
2017 ◽  
Vol 63 ◽  
pp. 13-22 ◽  
Author(s):  
Masafumi Natsuike ◽  
Hiroshi Oikawa ◽  
Kohei Matsuno ◽  
Atsushi Yamaguchi ◽  
Ichiro Imai
Keyword(s):  
Bering Sea ◽  
Chukchi Sea ◽  
Alexandrium Fundyense ◽  
Eastern Bering Sea ◽  
Physiological Adaptations

scholarly journals Predicted shifts of groundfish distribution in the Eastern Bering Sea under climate change, with implications for fish populations and fisheries management

2020 ◽  
Author(s):  
Christopher N Rooper ◽  
Ivonne Ortiz ◽  
Albert J Hermann ◽  
Ned Laman ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Bering Sea ◽  
Marine Species ◽  
Species Distribution Modelling ◽  
Fish Populations ◽  
Trawl Survey ◽  
Climate Scenarios ◽  
Important Species ◽  
Eastern Bering Sea ◽  
Northern Latitudes ◽  
Distribution Shifts

Abstract Climate-related distribution shifts for marine species are, in general, amplified in northern latitudes. The objective of this study was to predict future distributions of commercially important species in the eastern Bering Sea under six climate scenarios, by incorporating predictions of future oceanographic conditions. We used species distribution modelling to determine potential distribution changes in four time periods (2013–2017, 2030–2039, 2060–2069, and 2090-2099) relative to 1982–2012 for 16 marine fish and invertebrates. Most species were predicted to have significant shifts in the centre of gravity of the predicted abundance, the area occupied, and the proportion of the predicted abundance found in the standard bottom trawl survey area. On average the shifts were modest, averaging 35.2 km (ranging from 1 to 202 km). There were significant differences in the predicted trend for distribution metrics among climate scenarios, with the most extensive changes in distribution resulting from Representative Concentration Pathway 8.5 climate scenarios. The variability in distributional shifts among years and climate scenarios was high, although the magnitudes were low. This study provides a basis for understanding where fish populations might expand or contract in future years. This will provide managers’ information that can help guide appropriate actions under warming conditions.

scholarly journals Oceanographic parameters in continental margin of the State of Ceará (northeastern Brazil) deduced from C and O isotopes in foraminifers

2007 ◽  
Vol 79 (1) ◽  
pp. 129-139 ◽  
Author(s):  
Wanessa S. Marques ◽  
Eldemar de A. Menor ◽  
Alcides N. Sial ◽  
Valdir A.V. Manso ◽  
Satander S. Freire
Keyword(s):  
Continental Margin ◽  
Benthic Foraminifera ◽  
Linear Equations ◽  
The State ◽  
Northeastern Brazil ◽  
Oceanic Water ◽  
Ocean Water ◽  
Oxygen Utilization ◽  
Carbon And Oxygen Isotopes ◽  
Planktic Foraminifera

Specimens of Recent foraminifera of Amphistegina radiata, Peneroplis planatus and Globigerinoides ruber, from fifty samples of surface sediments of the continental margin of the State of Ceará, Brazil, have been analyzed for carbon and oxygen isotopes to investigate oceanographic parameters and determine the values of delta18O of the oceanic water. From a comparison between values of delta18O obtained for ocean water using the linear equations by (Craig and Gordon 1965) and the one by Wolff et al. (1998), it became evident that the former yielded a more reliable value (0.2‰ SMOW) than the latter. Lower values of delta18O for the ocean water in this continental margin resulted from continental water influence. Values of 18O (-0.3‰ to -1.5‰ PDB for benthic foraminifera and -0.6‰ to -2.4‰ PDB for planktic foraminifera), attest to a variation of temperatures of oceanic water masses, in average, between 20 to 22ºC in deep water and 24 to 27ºC, in surface water. Values of delta13C from +3.2‰ to -0.2‰ PDB (benthic foraminifera) reflect a variation in the apparent oxygen utilization (AOU) in the continental margin and indicate that the environments of bacteriological decomposition of organic matter are not continuous along the investigated area.

The Food of Fur Seals in the Eastern Bering Sea

1957 ◽  
Vol 21 (2) ◽  
pp. 237 ◽  
Author(s):  
Ford Wilke ◽  
Karl W. Kenyon
Keyword(s):  
Bering Sea ◽  
Eastern Bering Sea ◽  
Fur Seals
Sign in / Sign up

Export Citation Format

Share Document