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EFFECT OF TEMPERATURE ON METABOLISM OF PERIPHYTON COMMUNITIES DEVELOPED IN LABORATORY STREAMS 1
Author(s) -
Phinney Hawy K.,
McIntire C. David
Publication year - 1965
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.1965.10.3.0341
Subject(s) - respirometer , periphyton , respiration , oxygen , zoology , respiration rate , chemistry , metabolic rate , biology , ecology , botany , algae , endocrinology , organic chemistry
The effect of short‐term variations in temperature on metabolism of periphyton communities developed in laboratory streams was investigated with a 50‐liter respirometer chamber. The range of temperatures used was from 6 to 21C, similar to the range normally recorded in the laboratory streams during the year. In an experiment the temperature was increased from 6.5 to 16.6C during a 5‐hr period, and the rate of community respiration increased from 41 to 132 mg O 2 m −2 hr −1 . When the temperature was decreased from 17.5 to 9.4C during a 5‐hr period, the rate of community respiration decreased correspondingly from 105 to 63 mg O 2 m −2 hr −1 . An increase in temperature from 11.9 to 20.0C was accompanied by an increase in gross oxygen evolution from 335 to 447 mg O 2 m −2 hr −1 when the intensity of illumination was approximately 22,000 lux. The rate of oxygen production was not affected significantly at illumination intensities below 11,100 lux.