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The Cook Strait Canyon, New Zealand: Geomorphology and Seafloor Biodiversity of a Large Bedrock Canyon System in a Tectonically Active Environment

Citation

Lamarche, G and Rowden, AA and Mountjoy, J and Lucieer, V and Verdier, A-L, The Cook Strait Canyon, New Zealand: Geomorphology and Seafloor Biodiversity of a Large Bedrock Canyon System in a Tectonically Active Environment, Seafloor Geomorphology as Benthic Habitat: GeoHAB Atlas of Seafloor Geomorphic Features and Benthic Habitats, Elsevier, P Harris and E Baker (ed), London, pp. 727-737. ISBN 978-0-12-385140-6 (2012) [Research Book Chapter]

Copyright Statement

Copyright 2012 Elsevier Inc

DOI: doi:10.1016/B978-0-12-385140-6.00053-0

Abstract

The multibranched Cook Strait Canyon system (41°S–42°S) deeply incises the bedrock between the North and the South islands of New Zealand, cutting approximately 40km into the continental shelf. Water depths range from 120m on the shelf to 2,700m in the Hikurangi Trough. The geomorphology of the canyons reflects a tidally dominated seaway and intense seismotectonic activity associated with the neighboring active Pacific– Australia plate boundary. The study area covers ~4,500km2, including the Cook Strait Canyon (~1,800km2), areas of continental shelf, and deep sedimentary trough. This study uses Kongsberg EM300 multibeam data, 110 sediment samples, ~100 biological samples, and ~200 benthic taxa identified from seabed images and direct samples. Derivative spatially continuous data sets include geomorphic mapping, quantitative backscatter analysis, and sediment distribution, which enabled us to spatially analyze the geomorphic–sedimentary–biologic relationships to characterize the geohabitat and benthic biodiversity of a large, bedrock-incised submarine canyon system.

Item Details

Item Type:Research Book Chapter
Keywords:submarine canyon, subduction, tidal seaways
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Geophysics not elsewhere classified
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
Author:Lucieer, V (Dr Vanessa Lucieer)
ID Code:77501
Year Published:2012
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2012-04-23
Last Modified:2015-08-12
Downloads:2 View Download Statistics

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