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Ocean Science An interactive open-access journal of the European Geosciences Union

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Ocean Sci., 13, 259-272, 2017
http://www.ocean-sci.net/13/259/2017/
doi:10.5194/os-13-259-2017
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
04 Apr 2017
First year of practical experiences of the new Arctic AWIPEV-COSYNA cabled Underwater Observatory in Kongsfjorden, Spitsbergen
Philipp Fischer1, Max Schwanitz1, Reiner Loth2, Uwe Posner3, Markus Brand1, and Friedhelm Schröder4 1Alfred-Wegener-Institut Helmholtz Centre for Polar and Marine Research, Centre for Scientific Diving at the Biological Station Helgoland, Kurpromenade 211, 27498 Helgoland, Germany
2loth-engineering GmbH, Lochmühle 1, 65527 Niedernhausen, Germany
3-4H-JENA engineering GmbH, Mühlenstr. 126, 07745 Jena, Germany
4Helmholtz-Zentrum Geesthacht, Institut für Material- und Küstenforschung, Max-Planck-Straße 1, 21502 Geesthacht, Germany
Abstract. A combined year-round assessment of selected oceanographic data and a macrobiotic community assessment was performed from October 2013 to November 2014 in the littoral zone of the Kongsfjorden polar fjord system on the western coast of Svalbard (Norway). State of the art remote controlled cabled underwater observatory technology was used for daily vertical profiles of temperature, salinity, and turbidity together with a stereo-optical assessment of the macrobiotic community, including fish. The results reveal a distinct seasonal cycle in total species abundances, with a significantly higher total abundance and species richness during the polar winter when no light is available underwater compared to the summer months when 24 h light is available. During the winter months, a temporally highly segmented community was observed with respect to species occurrence, with single species dominating the winter community for restricted times. In contrast, the summer community showed an overall lower total abundance as well as a significantly lower number of species. The study clearly demonstrates the high potential of cable connected remote controlled digital sampling devices, especially in remote areas, such as polar fjord systems, with harsh environmental conditions and limited accessibility. A smart combination of such new digital sampling methods with classic sampling procedures can provide a possibility to significantly extend the sampling time and frequency, especially in remote and difficult to access areas. This can help to provide a sufficient data density and therefore statistical power for a sound scientific analysis without increasing the invasive sampling pressure in ecologically sensitive environments.

Citation: Fischer, P., Schwanitz, M., Loth, R., Posner, U., Brand, M., and Schröder, F.: First year of practical experiences of the new Arctic AWIPEV-COSYNA cabled Underwater Observatory in Kongsfjorden, Spitsbergen, Ocean Sci., 13, 259-272, doi:10.5194/os-13-259-2017, 2017.
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Short summary
We observed oceanographic and community data from October 2013 to November 2014 in the shallow waters of Kongsfjorden on the western coast of Svalbard (Norway) using remote controlled hydrographic and optic sensors. Daily vertical profiles of temperature, salinity, and turbidity were sampled together with stereo images of the macrobiotic community, including fish. A distinct seasonal cycle in total species abundances was found with surprisingly high animal counts during the polar winter.
We observed oceanographic and community data from October 2013 to November 2014 in the shallow...
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