Effects of emersion and temperature upon growth of the tropical brown alga Padina japonica,using a tide-simulation apparatus |
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Authors: | B. M. Allender |
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Affiliation: | (1) Department of Botany, University of Hawaii, Honolulu, USA;(2) Botany Department, University of Rhode Island, 02881 Kingston, Rhode Island, USA |
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Abstract: | A simple tide-simulation apparatus was used to investigate the influence of emersion and temperature on the intertidal growth of Padina japonica Yamada in both the juvenile and adult growth phases. The upper zonation limits are not determined by the sensitivity of any particular growth phase, since all phases show the same emersion tolerance limits. The species grows best when continuously submerged, and growth rates decrease with increasing emersion up to a clear upper zonation boundary. High temperature reduces the emersion tolerance and is therefore an important factor in tropical intertidal zonation. |
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