Epiphytism differences in Gelidiella acerosa cultivated with floating rafts and concrete blocks

Seasonal variations in epiphytic assemblages on Gelidiella acerosa cultivated in 2different methods (Floating raft and Bottom concrete block) were studied for 13 months from November 2009 to November 2010 covering all 4 seasons (northeast monsoon, southwest monsoon, autumn and summer). Twenty-five m...

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Bibliographic Details
Published in:Journal of applied phycology 2015-02, Vol.27 (1), p.399-412
Main Authors: Ganesan, M, Selvaraj, K, Chithra, K, Sirajudeen, S
Format: Article
Language:English
Subjects:
autumn
Biomedical and Life Sciences
Caulerpa peltata
Caulerpa racemosa
Chaetomorpha
Chaetomorpha linum
cortex
crop yield
Dictyota
Ecology
epiphytes
farmers
Freshwater & Marine Ecology
Gelidiella
Gelidiella acerosa
Hypnea
Hypnea valentiae
Jania
Jania adhaerens
Life Sciences
Lyngbya majuscula
monsoon season
Moorea producens
Padina tetrastromatica
Plant Physiology
Plant Sciences
salinity
scanning electron microscopy
seasonal variation
Struvea
Struvea anastomosans
summer
transmission electron microscopy
Zonaria
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Summary:Seasonal variations in epiphytic assemblages on Gelidiella acerosa cultivated in 2different methods (Floating raft and Bottom concrete block) were studied for 13 months from November 2009 to November 2010 covering all 4 seasons (northeast monsoon, southwest monsoon, autumn and summer). Twenty-five macro algal species were found in raft culture. Chaetomorpha linum Jania adhaerens, Hypnea valentiae, and Lyngbya majuscula were the dominant epiphytes. Twenty-four epiphytic algae were recorded in bottom concrete block culture. Caulerpa racemosa, Caulerpa peltata, Struvea anastomosans, Zonaria variegata, Padina tetrastromatica, Dictyota sp., J. adhaerens, and L. majuscula were the dominant epiphytic species. Seasonal trend in total epiphytic density was the same in both the culture with maximum density during autumn season (192 ± 41 epiphytes m⁻²in raft; 498 ± 10 epiphytes m⁻²in concrete block) and minimum during northeast monsoon season (112 ± 5 epiphytes m⁻²in raft; 247 ± 1 epiphytes m⁻²in concrete block). Seasonal variations in dominant epiphyte density followed the trend of total epiphytes with highest in monsoon and autumn seasons. Salinity showed significant positive correlation with epiphyte density (r = 0.63, P = 
ISSN:0921-8971
1573-5176
DOI:10.1007/s10811-014-0279-5