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A comparison of methods for measuring primary productivity and community respiration in streams

โœ Scribed by T.L. Bott; J.T. Brock; C.E. Cushing; S.V. Gregory; D. King; R.C. Petersen

Publisher
Springer
Year
1978
Tongue
English
Weight
643 KB
Volume
60
Category
Article
ISSN
1573-5141

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โœฆ Synopsis

Carbon dioxide and oxygen exchange procedures for measuring community metabolism (two open stream methods and three chamber methods) were compared on the same reach of a thirdorder stream . Open stream methods were complicated by high diffusion rates and yielded net community primary productivity estimates lower than those obtained with chamber methods . Chamber methods yielded variable productivity and respiration data . However, when normalized for chlorophyll a, productivity estimates from the chamber methods were within an expected range for the system . Balances of photosynthesis and respiration from the chamber methods were similar between methods and indicated that autotrophic or heterotrophic processes could dominate the system . Considerations in applying the various procedures are discussed . * River Continuum Publication No . 2. I

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