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PRIMARY PRODUCTION IN LABORATORY STREAMS 1, 2
Author(s) -
Mclntire C. David,
Garrison Robert L.,
Phinney Harry K.,
Warren Charles E.
Publication year - 1964
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.1964.9.1.0092
Subject(s) - streams , respiration , photosynthesis , environmental science , primary (astronomy) , primary production , oxygen , production (economics) , environmental chemistry , zoology , ecology , chemistry , biology , botany , ecosystem , physics , computer network , macroeconomics , organic chemistry , astronomy , computer science , economics
Six laboratory streams are being used to study primary production and community respiration in simple communities under different environmental conditions. A photosynthesis‐respiration chamber has been developed to perform experiments relating primary production to different environmental conditions and to verify primary production measurements made directly in the laboratory streams or in natural streams. Gross primary production in the six streams under 6,000 lux of illumination ranged from 2.4 to 4.7 g of oxygen per m 2 per day. Community respiration ranged from 1.6 to 4.2 g of oxygen per m 2 per day. The P/R ratios usually varied between 1.0 and 2.0. The relationship between illumination intensity and primary production was approximately linear between zero and 4,000 lux, and maximum photosynthetic rates were obtained at about 21,000 lux.