The seasonal abundance and production of Oithona nana (Copepoda: Cyclopoida) in Southampton Water
Williams, J.A. and Muxagata, E. (2006) The seasonal abundance and production of Oithona nana (Copepoda: Cyclopoida) in Southampton Water. Journal of Plankton Research, 28, (11), 1055-1065. (doi:10.1093/plankt/fbl039).
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Description/Abstract
Recent studies indicate that Oithona spp. contribute significantly to total copepod biomass. Little is known, however, about their ecological significance, particularly in the case of the estuarine Oithona nana. A study comprising three sites within Southampton Water was conducted to evaluate the late-stage copepodite/adult (stages IV–VI) O. nana community, using 120-µm mesh nets. Although present throughout the estuary, there was a striking spatial gradient with O. nana most common in the upper estuary. A clear seasonal pattern was observed with O. nana as the most abundant copepod species from late summer until early winter. It comprised 61% of all copepods recorded, with a biomass of 757.22 mg C m–3. Production estimates of O. nana were derived from the ‘instantaneous-growth’ approach, using appropriate growth equations. The estimated production of O. nana ranged from 1.50 mg C m–3 year–1 within the lower estuary to 146.77 mg C m–3 year–1 in the upper estuary. In the upper estuary, this compares with production rates of 187.47 mg C m–3 year–1 for all Acartia congeners (excluding nauplii), the most common calanoid genus. Throughout the estuary, O. nana annual production represented 18% of total copepod production clearly indicating that, at least in the upper estuary, O. nana production may be directly comparable with calanoid production.
| Item Type: | Article |
|---|---|
| ISSNs: | 0142-7873 (print) |
| Related URLs: | |
| Subjects: | Q Science > QL Zoology Q Science > QH Natural history > QH301 Biology |
| Divisions: | University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES) |
| Item ID: | 42345 |
| Date Deposited: | 29 Nov 2006 |
| Last Modified: | 12 Jul 2012 11:38 |
| Contributors: | Williams, J.A. (Author) Muxagata, E. (Author) |
| Date: | 2006 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/42345 |
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