The role of Phyllophora antarctica in structuring macrofaunal communities at Cape EvansEntry ID: K082_2001_2002_NZ_3
Abstract: Benthic suveys indicate that Phyllophora is the only attached macroalga present at Cape Evans. Attached and drift algal biomass was quantified in quadrats (61) between 0 - 30m depth using stratified random sampling. The alga formed an extensive cover (mostly occurring as loose-lying accumulations) at all depths sampled. All algae were dried and weighed. Two techniques were used to determine the ... photosynthetic activity of the seaweeds, PAM fluorometry in situ using a diver operated submersable fluorometer and seven patches of algae were measured on five replicate fronds from the top to the bottom of each plant. Each measurement was taken at a standard distance of 5mm from the plant surface and within 5cm of the apical tip of each frond. Benthic core samples were taken from under the drift algae to assess the structuring effect of drift Phyllophora accumulations on underlying macrofaunal communities. Macrofauna cores were sieved, preserved in 70% isopropyl alcohol, stained with Rose Bengal, sorted and identified to the lowest taxonomic level possible. Sediment cores were also taken and analysed for sediment particle size, organic matter, benthic chlorophyll a content and stable isotope signature of carbon and nitrogen.
This description is a member of a collection. The collection is described in
Start Date: 2001-11-06Stop Date: 2003-11-05
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Phone: +64 7 856 7026
Fax: +64 7 856 0151
Email: v.cummings at niwa.co.nz
NIWA PO Box 11-115
Country: New Zealand
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Antarctica New Zealand Private Bag 4745
Country: New Zealand
Norkko, A. Thrush, S.F. Cummings, V.J. Funnell, G.A. Schwarz, A.-M. Andrew, N.L. Hawes, I. Ecological role of Phyllophra antarctica drift accumulations in coastal soft-sediment communities of McMurdo Sound, Antarctica. Polar biology 27: 482-494, 2004.
Schwarz, A-M. Hawes, I. Andrew, N. Norkko, A. Cummings, V. Thrush, S. Macroalgal photosynthesis near southern global limit for growth; Cape Evans, Ross Sea, Antarctica. Polar biology 26: 789-799, 2003.
Schwarz, A.-M. Hawes, I. Andrew, N. Mercer, S. Cummings, V. Thrush, S. Primary production potential of non-geniculate coralline algae at Cape Evans, Ross Sea, Antarctica. Marine ecology progress series 294: 131-140, 2005.
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DIF Creation Date: 2005-10-11
Last DIF Revision Date: 2008-04-22