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Community composition of epibenthic megafauna on the West Greenland Shelf

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Abstract

Epibenthic organisms are a critical component of the marine environment, functioning as ecosystem engineers, habitat and food for other organisms. Our knowledge of the diversity, complexity and sensitivities of these habitats is limited, particularly at higher latitudes and greater depths. The West Coast of Greenland is the site of a commercially important shrimp trawl fishery, but there are few published records describing the benthic community structure of the region. Here we report results from benthic camera surveys conducted at 119 sites, over 3 years, spanning 1400 km of the West Greenland continental shelf (61–725 m depth). A total of 29 classes of epibenthic taxa were identified from the images. There are significant differences of composition and diversity in sites with hard and soft substrate. Hard-substrate communities are relatively diverse with higher abundances and are characterised by sessile, attached groups such as Hydrozoa, Anthozoa, Bryozoa and Porifera. Soft-sediment sites are less diverse and dominated by Polychaeta and have specialist Malacostraca such as the commercially exploited shrimp, Pandalus borealis. Distribution patterns and variation in epibenthic megafauna are related to substrate and the environmental parameters depth, temperature and current speed. This study represents the first quantitative characterisation of epibenthic megafaunal assemblages on the West Greenland continental shelf. These data constitute an important baseline, albeit in a region heavily impacted by trawl fisheries, and demonstrate the utility of benthic photography for examining and monitoring seabed diversity and change.

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Acknowledgments

We would like to thank the crew of the M/T Paamiut and the contributions of three anonymous reviewers. This work was funded by Sustainable Fisheries Greenland.

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Authors and Affiliations

  1. Institute of Zoology, Regent’s Park, London, NW14RY, UK

    C. Yesson, P. Simon, I. Chemshirova, T. Gorham, C. J. Turner & K. M. Kemp

  2. Greenland Institute of Natural Resources, Box 570, Kivioq 2, 3900, Nuuk, Greenland

    N. Hammeken Arboe & M. E. Blicher

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  1. C. Yesson
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  2. P. Simon
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  3. I. Chemshirova
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  4. T. Gorham
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  5. C. J. Turner
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  6. N. Hammeken Arboe
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  7. M. E. Blicher
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  8. K. M. Kemp
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Correspondence to C. Yesson.

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Yesson, C., Simon, P., Chemshirova, I. et al. Community composition of epibenthic megafauna on the West Greenland Shelf. Polar Biol 38, 2085–2096 (2015). https://doi.org/10.1007/s00300-015-1768-y

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  • DOI: https://doi.org/10.1007/s00300-015-1768-y

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