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Anthropogenic influence on sediment transport in the Whittard Canyon, NE Atlantic

Wilson, AM and Kiriakoulakis, K and Raine, R and Gerritsen, HD and Blackbird, S and Allcock, AL and White, M (2015) Anthropogenic influence on sediment transport in the Whittard Canyon, NE Atlantic. MARINE POLLUTION BULLETIN, 101 (1). pp. 320-329. ISSN 0025-326X

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Abstract

Unusual peaks in turbidity were detected in two branches of the Whittard Canyon in June 2013. Enhanced nepheloid layers (ENLs) were defined as layers with concentrations of suspended particulate matter exceeding those of nepheloid layers typically observed in a given region. Here, ENLs had peaks in turbidity and elevated suspended particulate matter concentrations exceeding ~1 mg L−1 with the largest ENLs measuring between ~2–8mg L−1. The ENLs measured ~100–260m in vertical height and were detected inwater depths of between 640 and 2880 m. Vessel Monitoring System data showed that high spatial and temporal activity of potential bottom trawling vessels coincided with the occurrence of the ENLs. Molar C/N ratios of the suspended organic material from the ENLs showed a high degree of degradation. Regular occurrences of such events are likely to have implications for increased sediment fluxes, burial of organic carbon and alteration of benthic and canyon ecosystems.

Item Type: Article
Uncontrolled Keywords: MD Multidisciplinary
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Natural Sciences and Psychology
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
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Date Deposited: 20 Apr 2016 14:56
Last Modified: 07 Sep 2017 14:17
DOI or Identification number: 10.1016/j.marpolbul.2015.10.067
URI: http://researchonline.ljmu.ac.uk/id/eprint/3440

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