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dc.contributor.authorMiller, Victoria B.en_US
dc.contributor.authorSzymanski, David M.en_US
dc.coverage.spatialMaple River - East Branchen_US
dc.coverage.spatialMaple River - West Branchen_US
dc.date.accessioned2007-06-14T21:48:34Z
dc.date.available2007-06-14T21:48:34Z
dc.date.issued1991en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/54295
dc.description.abstractThe effects of light and shade on algal sand communities in two branches of the Maple River were studied. A secondary objective was to test an experimental method using dissolved oxygen measurements to assess respiration and net primary productivity. Glass jars set in light and dark areas of the stream reach were used to measure net primary productivity and respiration. Standing crop was determined with chlorophyll a and ash-free dry mass analysis of sand samples. Respiration was higher in the West Branch, but there was no significant difference between light conditions. Net primary productivity, chlorophyll a values and ash-free dry mass were all significantly higher in the East Branch. Chlorophyll a had significantly greater amounts in shaded areas, as did ash-free dry mass. Higher standing crop in the East Branch may be due to richer substrates surrounding the site and to algal drift. Lower light intensities in the shaded areas probably account for higher chlorophyll a concentrations than in light.en_US
dc.format.extent355018 bytes
dc.format.extent3144 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.relation.haspartGraphen_US
dc.subjectStreamsen_US
dc.titleNutrient and light effects on productivity, respiration, and standing crop on sand riffle communities in two northern Michigan streams.en_US
dc.typeWorking Paperen_US
dc.subject.hlbsecondlevelNatural Resource and Environmenten_US
dc.subject.hlbtoplevelScienceen_US
dc.contributor.affiliationumBiological Station, University of Michiganen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/54295/1/2731.pdfen_US
dc.description.filedescriptionDescription of 2731.pdf : Access restricted to on-site users at the U-M Biological Station.en_US
dc.owningcollnameBiological Station, University of Michigan (UMBS)


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