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Microdistribution and diel vertical migration of flagellated vs. gas‐vacuolate purple sulfur bacteria in a stratified water body
Author(s) -
AliÓ Carlos Pedrbs,
Sala Ma. Montserrat
Publication year - 1990
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1990.35.7.1637
Subject(s) - diel vertical migration , chromatium , bacteria , purple bacteria , thermocline , plankton , anaerobic bacteria , ecology , sulfur , biology , oceanography , chemistry , environmental chemistry , botany , geology , paleontology , photosynthesis , photosynthetic reaction centre , organic chemistry
The diel vertical distribution of purple sulfur bacteria was followed in Lake Cisó. A syringe system provided simultaneous samples every 3 cm. One of the bacteria, Chromatium minus , was flagellated and showed vertical migration of 35 cm. This daily excursion was enough to maintain itself in the uppermost anaerobic part of the metalimnion. The swimming speeds necessary to explain such migration were within the range of values previously recorded for these bacteria in the field. The other bacterium, Amoebobacter M3, had gas vesicles but did not seem to move vertically. Thus, vertical migration by a planktonic bacterium was demonstrated in nature.