Document of bibliographic reference 339907

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Impacts of bottom trawling on benthic biogeochemistry in muddy sediments: removal of surface sediment using an experimental field study

Abstract

Experimental benthic dredging was conducted in an unfished, muddy area in the Baltic Proper to mimic the impact of trawling by removing surface sediment, with a focus on benthic biogeochemical processes. Sediment cores were taken on the track and compared to undisturbed controls. Benthic fluxes were immediately affected and an upward shift in pore water DIC profiles was detected. The time needed for the sediment to readjust to a new biogeochemical state seemed to be nutrient-specific. Sediment properties (profiles of chlorophyll, organic carbon and water content) were found to change significantly. Macrofauna was removed completely by the dredge pointing out the potential loss of highly valuable functions that are associated with them. In the Baltic Sea, in areas which were previously the most heavily fished, the frequency of trawling may have left little time for readjustment and potentially kept the seabed in a permanent state of transient biogeochemical cycling.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000675833400005

Bibliographic citation

Morys, C.; Brüchert, V.; Bradshaw, C. (2021). Impacts of bottom trawling on benthic biogeochemistry in muddy sediments: removal of surface sediment using an experimental field study. Mar. Environ. Res. 169: 105384. https://dx.doi.org/10.1016/j.marenvres.2021.105384

Topic

Marine

Is peer reviewed

true

Access rights

open access

Is accessible for free

true