Macroalgae in the Biosphere 2 ocean

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Macroalgae in the Biosphere 2 ocean
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Sampling procedure

• Transect lines divided ocean into quadrats
• One ring was dropped in a random location within
  each quadrat
• Algae within each ring was collected
• Algae was identified
• Algae was dried and weighed

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Amphiroa
Haliptilon
Jania
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Gelidiopsis
Chondrus
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Species List
RHODOPHYTA Acanthophora spicifera Amphiroa
fragilissima Amphiroa rigida Botryocladia
pyriformis Chondria dasyphylla Flahaultia
Gracilaria tikvahiae Gelidiopsis
intricata Haliptilon cubense Halymenia
duchassaingii Jania adhaerens Mesophyllum
mesomorphum Peyssonnelia Rhodogorgon
carriebowensis Sporolithon
CHLOROPHYTA Caulerpa serrulata Chaetomorpha sp.
Dictyosphaeria cavernosa Dictyosphaeria ocellata
Enteromorpha sp. Ernodesmis verticillata Halimeda
incrassata Halimeda tuna Rhipocephalus
divericata Rhipocephalus phoenix Valonia
aegagropila Valonia macrophysa Valonia
utricularis Ventricaria ventricosa PHEOPHYTA Dict
yota cervicornis Dictyota divercata Dictyota
mertensii Dictyota pulchella Padina sp.

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Shannon-Weiner Diversity Indices
Oct 1999 0.55 Nov 1999 0.58 Dec 1999
0.55 Jan 2000 0.51 Feb 2000 0.45 Mar 2000
0.42 Jun 2000 0.47 Sep 2000 0.43 Nov
2000 0.52 Jan 2001 0.66 Mar 2001
0.64 Aug 2001 0.59
Jan 2002 0.59 Mar 2002 0.56 May 2002
0.55 Jul 2002 0.62 Sep 2002 0.50 Jan
2003 0.63 Mar 2003 0.65 June 2003
1.21 Aug 2003 1.08 Oct 2003 0.97
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Future analyses

• Correlations with environmental factors
• light
• CO2
• nutrients
• Comparisons with natural reef environments

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Photo references

• www.botany.hawaii.edu/ReefAlgae/ What20plants
• rmocfis.upr.clu.edu/ballan/ haliptilon.html
• www.coralreefnetwork.com/rhodophyta.html
• www.ne.jp/asahi/marine/ algae/Chondria1.html
• www.space.com/biosphere2_001110.html (bio2)
• garion.tzo.com/lynn/ biosphere2.htm (bio2)
• www.kynn.com/photos/2001/ 03/arizona/biosphere_2