- Title
- Plankton trophodynamics at the subtropical convergence, Southern Ocean
- Creator
- Richoux, Nicole B, Froneman, P William
- Subject
- To be catalogued
- Date
- 2009
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/457967
- Identifier
- vital:75704
- Identifier
- xlink:href="https://doi.org/10.1093/plankt/fbp054"
- Description
- Stable isotope signatures (δ13C, δ15N) in zooplankton tissues and particulate organic matter (POM) were determined to assess regional differences in the trophodynamics of zooplankton communities between 38 and 43°S, where the cool nutrient-rich subantarctic waters of the Southern Ocean meet the warm nutrient-poor subtropical waters of the southwest Indian Ocean at the subtropical convergence (STC). Significantly enriched values of δ15N were noted in populations of all major zooplankton groups inhabiting the warm and saline water mass north of the STC (maximum surface temperature 21°C), including the euphausiids, salps, amphipods, copepods, ostracods, pyrosomes, pteropods and chaetognaths, compared with those in the cool, less saline southern water mass (minimum surface temperature 11°C). Similar patterns of δ15N in POM collected throughout the region suggest that the large changes in zooplankton δ15N values across the frontal region are driven by variations in the phytoplankton communities. The differing trophodynamics in communities north and south of the STC provide compelling evidence of distinct bottom-up effects on planktonic food webs which have important implications in the determination of trophic positions and motility of plankton and higher consumers using δ15N signatures. Although expected, similar latitudinal variations in δ13C signatures were not found.
- Format
- computer, online resource, application/pdf, 1 online resource (15 pages), pdf
- Publisher
- Oxford Academic Journals
- Language
- English
- Relation
- Journal of Plankton Research, Richoux, N.B. and Froneman, P.W., 2009. Plankton trophodynamics at the subtropical convergence, Southern Ocean. Journal of plankton research, 31(9), pp.1059-1073, Journal of Plankton Research volume 31 number 9 p. 1059 2009 1464-3774
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Oxford Academic Journals Open Access Policy Statement (https://academic.oup.com/journals/pages/open_access)
- Rights
- Closed Access
- Hits: 5
- Visitors: 5
- Downloads: 0
Collections
Froneman, Pierre William (Prof)
Richoux, Nicole Bertine (Assoc Prof)
SDG 15. Life On Land
RU Department of Zoology and Entomology
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Plankton trophodynamics at the subtropical convergence, Southern Ocean.pdf | 647 KB | Adobe Acrobat PDF | View Details Download |