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Deep-sea sampling on CMarZ cruises in the Atlantic Ocean – an Introduction

Deep-sea sampling on CMarZ cruises in the Atlantic Ocean – an Introduction
Deep-sea sampling on CMarZ cruises in the Atlantic Ocean – an Introduction
The deep-sea zooplankton assemblage is hypothesized to have high species diversity, with low abundances of each species. However, even rare species may have huge population sizes and play a critical role in the dynamics of deep-sea environments. The Census of Marine Zooplankton (CMarZ) study sought to accurately assess zooplankton diversity in the mesopelagic and bathypelagic zones of the subtropical/tropical of the northwest and eastern sections of the Atlantic Ocean using integrated morphological and molecular analysis of large-volume samples to depths of 5,000 m. The field surveys in April 2006 and November 2007 included scientists and students associated with the CMarZ. The cruise field work entailed at-sea analysis of samples and identification of specimens by expert taxonomists, with at-sea DNA sequencing to determine a barcode (i.e., a short DNA sequence for species recognition) for selected species. Environmental data and zooplankton samples were collected with 1-m2 and 10-m2 opening/closing MOCNESS (0–1000 m and 1000–5000 m, respectively), and with either a 0.25-m2 MOCNESS or a 0.5-m2 Multi-net above 1000 m. More than 500 species were identified and more than 1000 specimens placed in a queue for barcoding on each cruise; several hundred species were barcoded at sea. For several taxonomic groups, a significant fraction of the region’s known species were collected and identified. For example, in the northwest Atlantic 93 of 140 known ostracod species for the Atlantic Ocean were collected, 6 undescribed species were found, and the first DNA barcode for a planktonic ostracod was obtained. The deployment of trawls with fine-mesh nets to sample large volumes at great depths for small zooplankton confirmed that there is considerable species diversity at depth, with more species yet to be discovered.
0967-0645
2157-2166
Wiebe, Peter H.
cf6a052f-72e2-4aa9-94c0-82f9c1b66264
Bucklin, Ann
38c4b397-140e-433c-8c2e-aaeae7f79603
Madin, Laurence
1146f51a-1b63-4327-b76f-4000370366f9
Angel, Martin V.
b1ed191c-1a19-4a3b-b0f4-ff7fb4f538c8
Sutton, Tracey
0e31d5b1-ca34-4053-9cb7-891fb01360f1
Pagés, Francesc
054b6fcb-af9b-4af7-91a7-7663e3b1d65c
Hopcroft, Russell R.
49c78665-564e-4125-beb2-0403744ba21c
Lindsay, Dhugal
95b74b27-090f-4b4c-9b2d-892dbc8e6f54
Wiebe, Peter H.
cf6a052f-72e2-4aa9-94c0-82f9c1b66264
Bucklin, Ann
38c4b397-140e-433c-8c2e-aaeae7f79603
Madin, Laurence
1146f51a-1b63-4327-b76f-4000370366f9
Angel, Martin V.
b1ed191c-1a19-4a3b-b0f4-ff7fb4f538c8
Sutton, Tracey
0e31d5b1-ca34-4053-9cb7-891fb01360f1
Pagés, Francesc
054b6fcb-af9b-4af7-91a7-7663e3b1d65c
Hopcroft, Russell R.
49c78665-564e-4125-beb2-0403744ba21c
Lindsay, Dhugal
95b74b27-090f-4b4c-9b2d-892dbc8e6f54

Wiebe, Peter H., Bucklin, Ann, Madin, Laurence, Angel, Martin V., Sutton, Tracey, Pagés, Francesc, Hopcroft, Russell R. and Lindsay, Dhugal (2010) Deep-sea sampling on CMarZ cruises in the Atlantic Ocean – an Introduction. Deep Sea Research Part II: Topical Studies in Oceanography, 57 (24-26), 2157-2166. (doi:10.1016/j.dsr2.2010.09.018).

Record type: Article

Abstract

The deep-sea zooplankton assemblage is hypothesized to have high species diversity, with low abundances of each species. However, even rare species may have huge population sizes and play a critical role in the dynamics of deep-sea environments. The Census of Marine Zooplankton (CMarZ) study sought to accurately assess zooplankton diversity in the mesopelagic and bathypelagic zones of the subtropical/tropical of the northwest and eastern sections of the Atlantic Ocean using integrated morphological and molecular analysis of large-volume samples to depths of 5,000 m. The field surveys in April 2006 and November 2007 included scientists and students associated with the CMarZ. The cruise field work entailed at-sea analysis of samples and identification of specimens by expert taxonomists, with at-sea DNA sequencing to determine a barcode (i.e., a short DNA sequence for species recognition) for selected species. Environmental data and zooplankton samples were collected with 1-m2 and 10-m2 opening/closing MOCNESS (0–1000 m and 1000–5000 m, respectively), and with either a 0.25-m2 MOCNESS or a 0.5-m2 Multi-net above 1000 m. More than 500 species were identified and more than 1000 specimens placed in a queue for barcoding on each cruise; several hundred species were barcoded at sea. For several taxonomic groups, a significant fraction of the region’s known species were collected and identified. For example, in the northwest Atlantic 93 of 140 known ostracod species for the Atlantic Ocean were collected, 6 undescribed species were found, and the first DNA barcode for a planktonic ostracod was obtained. The deployment of trawls with fine-mesh nets to sample large volumes at great depths for small zooplankton confirmed that there is considerable species diversity at depth, with more species yet to be discovered.

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Published date: December 2010
Organisations: Marine Biogeochemistry

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Local EPrints ID: 169237
URI: http://eprints.soton.ac.uk/id/eprint/169237
ISSN: 0967-0645
PURE UUID: 176f789b-d067-464e-8ac6-f1fe877af351

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Date deposited: 13 Dec 2010 10:24
Last modified: 14 Mar 2024 02:20

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Contributors

Author: Peter H. Wiebe
Author: Ann Bucklin
Author: Laurence Madin
Author: Martin V. Angel
Author: Tracey Sutton
Author: Francesc Pagés
Author: Russell R. Hopcroft
Author: Dhugal Lindsay

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