A year in Barkley Canyon: A time-series observatory study of mid-slope benthos and habitat dynamics using the NEPTUNE Canada network |
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| Institution: | 1. State Key Laboratory of Remote Sensing Science, and College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China;2. Center for Global Sea Level Change, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates;3. Division of Geodetic Science, School of Earth Sciences, The Ohio State University, OH 43210, USA;4. Ministry of Education Laboratory Key Laboratory for Earth System Modeling, and Center for Earth System Science, Tsinghua University, Beijing 100084, China;5. Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720-3114, USA;1. Biology Department, Queens College, The City University of New York, 65-30 Kissena Boulevard, Flushing, NY 11367, USA;3. New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates;1. Department of Computer Science, Jordan University of Science and Technology, 22110, Jordan;2. Staffordshire University, Stafford, UK;3. Department of Computer Science, North Carolina State University, Raleigh, NC, USA;4. IBM Corporation, Center for Advanced Studies, Research Triangle Park, NC, USA |
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| Abstract: | Understanding long-term trends in species abundance and distribution represents an important challenge for future research in the deep sea, particularly as management of human impacts becomes a more important concern. However, until natural higher frequency variability is better understood, it will be difficult to interpret any long-term trends that may be apparent in data sets. We present here the results of the first year of observations at the NEPTUNE Canada cabled observatory site in Barkley Canyon, off the coast of Vancouver Island, in the northeast Pacific Ocean. Presence/absence and abundance data for 28 faunal groups were extracted from daily video records from an observatory camera. Concurrent CTD and current meter data were collected from co-located instruments. Water mass properties, currents and faunal community composition exhibited notable seasonal trends. Distinct seasonal faunal groupings were observed, together with summer and winter trends in temperature, salinity and current patterns. Variations in abundance of decapod crustaceans and fishes were responsible for most differences between faunal groups. We suggest that faunal composition may have been responding to seasonal variations in food availability, together with direct and indirect physical influences on predator and prey abundance. |
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| Keywords: | Barkley Canyon Time-series observatory Benthos NEPTUNE Canada Seasonal trends Faunal composition |
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