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OLSTHODISCUS LUTEUS (CHRYSOPHYCEAE) II. FORMATION AND SURVIVAL OF A BENTHIC STAGE 1
Author(s) -
Tomas Carmelo R.
Publication year - 1978
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1978.tb00304.x
Subject(s) - benthic zone , biology , darkness , lysis , botany , ecology , microbiology and biotechnology
ABSTRACT Motile unicells of Olisthodiscus lutheus Carter aggregated to form encapsulated masses of nonmotile cells in a benthic stage throughout a temerature range of 15–30°C at salinities o f 10–50%. Motile cells were released from beneathic masses at 10–30°C but at 5°C, cells were not motile and at 0°C cells lysed. Exposure of benthic masses of I day to 8 wk to temperatures of 0–30C in lighted growth chambers resulted in mortality to cells kept below 10°C and normal growth at higher temperatures. Benthic stage cells kept tn darkness at the same temperatures exhibited mortality in all but those at 5 and 10°C. Cells at these thmoeratures remained viable 15 wk in continual darkness. Comparison of cell morphology of matile and benthic stage O. luteus to other Olisthodiscus species and the ecological implications o fthe benthic stage are discussed.