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Effects of current on the development of loosely and tightly attached layers in periphyton communities
Author(s) -
Abe Shinichiro,
Nagumo Tamotsu,
Tanaka Jiro
Publication year - 2000
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1046/j.1440-1835.2000.00209.x
Subject(s) - periphyton , current (fluid) , biomass (ecology) , biology , growth rate , regimen , ecology , zoology , medicine , oceanography , geology , geometry , mathematics
SUMMARY The growth rate and peak biomass of loosely and tightly attached layers in periphyton communities were measured in slow (39 cm s −1 ), moderate (67 cm s −1 ) and fast (137 cms −1 ) current regimens using experimental channels. The peak biomasses of the loosely and tightly attached layers were highest in the moderate and fast current regimens, respectively. The growth rate of the loosely attached layer was lower in the fast current regimen than in the other current regimens, however, there was no significant difference in the growth rates of the tightly attached layers. These results indicate that current restricts the biomass accumulation of the loosely attached layer in the slow and fast current regimens, and that biomass accumulation is highest in the moderate current regimen, while in the tightly attached layer the fast current regimen led to a maximization of the biomass.