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Grazing and UV radi...
Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study
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Zacher, K. (author)
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Hanelt, D. (author)
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Wiencke, C. (author)
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- Wulff, Angela, 1963 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för marin ekologi,Department of Marine Ecology
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(creator_code:org_t)
- 2007-04-18
- 2007
- English.
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In: Polar Biology. - : Springer Science and Business Media LLC. - 0722-4060 .- 1432-2056. ; 30:9, s. 1203-1212
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https://epic.awi.de/...
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Subject headings
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- A 15 week field experiment (austral summer Nov-Mar) was carried out in an intertidal hard bottom platform in Antarctica (King George Island). To test whether grazing and ultraviolet radiation (UVR) influenced the succession of a benthic microalgal assemblage, a two-factorial design was used (1) ambient radiation, > 280 nm; (2) ambient minus UV-B, > 320 nm; (3) ambient minus UVR, > 400 nm versus grazer-no grazer). On four sampling occasions microalgae were identified, counted and carbon contents were calculated. The assemblage was dominated by the diatom genera Navicula and Cocconeis. Biomass was generally low in all treatments but was significantly reduced by grazing throughout the experiment. No significant UV effects were found. Grazer absence particularly favoured diatoms of the genus Cocconeis. We conclude that the Antarctic microalgal assemblage was unaffected by present day UVR whereas grazers acted as important drivers on the intertidal microalgal community structure.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- benthic diatoms
- diversity
- grazing
- hard bottom community
- microalgae
- UV radiation
- BENTHIC DIATOM MAT
- YOUNG SOUND
- MICROBENTHIC COMMUNITY
- MARINE-SEDIMENTS
- SIGNY ISLAND
- NE GREENLAND
- STREBEL 1908
- B
- RADIATION
- BIOMASS
- ECOSYSTEM
Publication and Content Type
- ref (subject category)
- art (subject category)
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