Abundance, biomass and secondary production of benthic megafauna on the Barents Sea shelf in 2008 and 2009 ...

Megabenthos plays a major role in the overall energy flow on Arctic shelves, but information on megabenthic secondary production on large spatial scales is scarce. Here, we estimated for the first time megabenthic secondary production for the entire Barents Sea shelf by applying a species-based empi...

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Bibliographic Details
Main Authors: Degen, Renate, Jørgensen, Lis Lindal, Ljubin, Pavel, Ellingsen, Ingrid H, Pehlke, Hendrik, Brey, Thomas
Format: Dataset
Language:English
Published: PANGAEA 2016
Subjects:
Campaign of event
Basis of event
Location of event
Event label
Date/Time of event
Latitude of event
Longitude of event
Secondary production as carbon
58GS2008
58JH2008
90VY2008
58GS2009
58JH2009
58JM2009
90VY2009
G. O. Sars 2003
Johan Hjort 1990
Vilnyus
Jan Mayen
Arctic
Barents Sea
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.857279
https://doi.pangaea.de/10.1594/PANGAEA.857279
Description
Summary:Megabenthos plays a major role in the overall energy flow on Arctic shelves, but information on megabenthic secondary production on large spatial scales is scarce. Here, we estimated for the first time megabenthic secondary production for the entire Barents Sea shelf by applying a species-based empirical model to an extensive dataset from the joint Norwegian- Russian ecosystem survey. Spatial patterns and relationships were analyzed within a GIS. The environmental drivers behind the observed production pattern were identified by applying an ordinary least squares regression model. Geographically weighted regression (GWR) was used to examine the varying relationship of secondary production and the environment on a shelfwide scale. Significantly higher megabenthic secondary production was found in the northeastern, seasonally ice-covered regions of the Barents Sea than in the permanently ice-free southwest. The environmental parameters that significantly relate to the observed pattern are bottom temperature ... : The dataset contains trawl data and environmental information from 398 stations sampled during the joint Norwegian-Russian Barents Sea Ecosystem Survey in 2008 and 2009. Megafauna was sampled with a Campelen 1800 bottom trawl. Here secondary production (mg carbon/m²/a) per station are given. The environmental information includes water depth (m), bottom water temperature (°C), salinity (psu), currents speed, standard deviation of sea ice concentration, and information about the sediment structure and the intensity of commercial trawling. ...

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