Community Metabolism in Natural and Agriculturally Disturbed Riffle Sections of the Chippewa River, Isabella County, Michigan

ABSTRACT Estimates of aquatic community metabolism were made seasonally (1983–1984) at three sites representing an agricultural gradient along the Chippewa River. Annual mean photosynthesis/respiration ratios (P/R), monitored with an in situ chamber method, demonstrated an autotrophic-heterotrophic shift consistent with increased farming intensity (P/R=1.31 vs 1.08 vs 0.64). Other productive and consumptive parameters supported those trends summarized in the P/R values. Within-site seasonal measurements indicated summer maxima and winter minima. Particle-sized organic content (AFDW) was determined for chamber sediments in order to locate the source of oxygen metabolism. While productive sections maintained populations of epilithic diatoms and filamentous green algae on relatively large substrates, the most disturbed site was heterotrophically dominated by very small particles.

[1]  Nancy B. Grimm,et al.  TEMPORAL SUCCESSION IN A DESERT STREAM ECOSYSTEM FOLLOWING FLASH FLOODING , 1982 .

[2]  P. Maris,et al.  Some factors affecting the respiration of some aquatic plants , 1964, Hydrobiologia.

[3]  D. E. Busch,et al.  Metabolism of a desert stream , 1981 .

[4]  R. Naiman,et al.  Relationships Between Metabolic Parameters and Stream Order in Oregon , 1980 .

[5]  G. Minshall.  Autotrophy in Stream Ecosystems , 1978 .

[6]  J. Stockner,et al.  Autotrophic Production in Carnation Creek, a Coastal Rainforest Stream on Vancouver Island, British Columbia , 1976 .

[7]  G. Minshall,et al.  INTERBIOME COMPARISON OF STREAM ECOSYSTEM DYNAMICS , 1983 .

[8]  C. D. Mcintire,et al.  EFFECT OF TEMPERATURE ON METABOLISM OF PERIPHYTON COMMUNITIES DEVELOPED IN LABORATORY STREAMS1 , 1965 .

[9]  S. Gregory.  Effects of light, nutrients, and grazing on periphyton communities in streams , 1980 .

[10]  C. D. Mcintire.  Some Factors Affecting Respiration of Periphyton Communities in Lotic Environments , 1966 .

[11]  John C. Wright,et al.  PRODUCTIVITY STUDIES ON THE MADISON RIVER, YELLOWSTONE NATIONAL PARK1 , 1967 .

[12]  W. McDiffett,et al.  An Estimate of Primary Productivity in a Pennsylvania Trout Stream Using a Diurnal Oxygen Curve Technique , 1972 .

[13]  C. D. Mcintire,et al.  Laboratory Studies of Periphyton Production and Community Metabolism in Lotic Environments , 1965 .

[14]  S. Fisher,et al.  Periphyton production in Fort River, Massachusetts , 1979 .

[15]  G. Minshall,et al.  Relationships among chemical, physical, and biological indices along river continua based on multivariate analyses , 1983 .

[16]  R. Naiman.  The Annual Pattern and Spatial Distribution of Aquatic Oxygen Metabolism in Boreal Forest Watersheds , 1983 .