Distribution and feeding modes of macrobenthos within three oceanographic feature areas of the KwaZulu-Natal Bight, South Africa
| Autor: | CF MacKay, CB Untiedt |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Continental shelf 010604 marine biology & hydrobiology Sediment Replicate Aquatic Science Spatial distribution 01 natural sciences Taxon Geography Oceanography Abundance (ecology) Macrobenthos Ecosystem Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | African Journal of Marine Science. 38:S91-S104 |
| ISSN: | 1814-2338 1814-232X |
| Popis: | The composition and distribution of macrobenthic communities was investigated in three areas in the KwaZulu- Natal Bight, a section of shelf off the east coast of South Africa. Areas were pre-selected on the basis of three known oceanographic features, posited to deliver land- or Agulhas Current-derived nutrients onto the shelf and to drive ecosystem functioning in this region. Replicate sediment samples were collected with a 0.2 m2 van Veen grab, during two surveys (A, B) corresponding with normal periods of high and low rainfall, respectively. A subset of the full station array was selected across the shelf in an arrangement of increasing depths (inner-, mid- and outer shelf) through each feature area to investigate the spatial distribution and feeding modes of macrobenthic taxa. The two periods showed some differences in abundance and numbers of macrobenthic taxa, but were not statistically different. Total macrobenthic abundance from Survey A was 20 215 individuals from 642 taxa, decreasing to 18 000 ... |
| Databáze: | OpenAIRE |
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