Physical and geochemical responses to bottom trawling on naturally disturbed sediments in the eastern Bering Sea

Author:

Stephens J Drew12ORCID,McConnaughey Robert A1

Affiliation:

1. RACE Division, Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA , Seattle, WA 98115 , United States

2. NOAA Commissioned Officer Corps, Office of Marine and Aviation Operations, NOAA , Norfolk, VA 23510 , United States

Abstract

Abstract Recent concerns that commercial bottom trawling can contribute to a significant release of sequestered marine carbon have highlighted a need for research in this area. Here, a Before-After Control-Impact (BACI) experimental design was utilized in a previously untrawled area of the eastern Bering Sea. Six pairs of experimental and control corridors were sampled before, after, and 1 year after a trawl disturbance. Each experimental corridor was fished four consecutive times over ∼12 h with a commercial otter trawl. Results were contextualized with minimum detectable effects (MDE), and showed no evidence of a trawl effect on total organic carbon (P = .999, MDE ± 0.05% TOC), total nitrogen (P = .999, MDE ± 0.02% TN), δ13C, and δ15N isotope ratios and sediment size classes. Interannual changes observed in δ15N, sand, silt, and clay are attributed to natural variation. The study suggests that the characteristics of the study site, such as storm disturbances, high sand content, and low carbon content, limited the bottom-trawl effect on sediment composition following this initial trawl disturbance. The findings highlight the importance of site-specific studies that account for local conditions to support best management practices for commercial bottom trawling.

Funder

National Marine Fisheries Service

Publisher

Oxford University Press (OUP)

Reference45 articles.

1. AFSC/FMA/North Pacific Observer Domestic Data Dictionary from 1986 to 2000;Alaska Fisheries Science Center,2023

2. Remineralization rates, recycling, and storage of carbon in Amazon shelf sediments;Aller;Cont Shelf Res,1996

3. Bottom trawl fishing footprints on the world’s continental shelves;Amoroso;Proc Natl Acad Sci,2018

4. Global patterns in marine sediment carbon stocks;Atwood;Front Mar Sci,2020

5. The size-reactivity continuum of major bioelements in the ocean;Benner;Ann Rev Mar Sci,2015

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