Marine & Environmental Sciences Faculty Articles
Deep-Sea Sampling on CMarZ Cruises in the Atlantic Ocean – an Introduction
ORCID
0000-0002-5280-7071
Document Type
Article
Publication Title
Deep Sea Research Part II: Topical Studies in Oceanography
ISSN
0967-0645
Publication Date
12-2010
Keywords
Zooplankton, Fish, Mesopelagic, Bathypelagic, DNA barcode, Diversity, Atlantic Ocean, Sargasso Sea
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-m2opening/closing MOCNESS (0–1000 m and 1000–5000 m, respectively), and with either a 0.25-m2MOCNESS 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.
DOI
10.1016/j.dsr2.2010.09.018
Volume
57
Issue
24-26
First Page
2157
Last Page
2166
Additional Comments
NOAA Ocean Exploration Program grant #: NA06OAR4600091
NSUWorks Citation
Peter Wiebe, Ann Bucklin, Laurence P. Madin, Martin V. Angel, Tracey Sutton, Francescn Pages, Russell R. Hopcroft, and Dhugal Lindsay. 2010. Deep-Sea Sampling on CMarZ Cruises in the Atlantic Ocean – an Introduction .Deep Sea Research Part II: Topical Studies in Oceanography , (24-26) : 2157 -2166. https://nsuworks.nova.edu/occ_facarticles/513.
Comments
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