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5/21/2018  |   9:15 AM - 9:30 AM   |  META-ANALYSIS OF HETEROTROPHIC MICROBIAL RESPONSES TO PERIPHYTIC ALGAL PHOTOSYNTHESIS   |  321

META-ANALYSIS OF HETEROTROPHIC MICROBIAL RESPONSES TO PERIPHYTIC ALGAL PHOTOSYNTHESIS

Numerous studies have investigated heterotrophic microbial responses to algal photosynthesis. Here we report the results of a meta-analytical synthesis of published and unpublished experiments (N ranging from 8 to 46) focused on the responses of heterotrophic microbial production (bacterial and fungal) and extracellular enzyme activity (beta-glucosidae, beta-xylosidase, leucine aminopeptidase, phosphatase, and phenol oxidase) to concurrent algal photosynthesis in periphyton communities. Algal photosynthesis caused significantly increased activity in all response variables, except for beta-xylosidase and phenol oxidase where the trends were positive, but not statistically significant. Fungal production was stimulated by photosynthesis to a significantly greater degree than any other heterotrophic response, suggesting that fungal-algal interactions may be of particular importance in periphyton communities.

  • Microbial
  • Periphyton
  • Secondary Production

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Presenters/Authors

Steve Francoeur (), Biology Department, Eastern Michigan University, steve.francoeur@emich.edu;


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Halvor Halvorson (), University of Central Arkansas, hhalvorson@uca.edu;


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Kevin Kuehn (), The University of Southern Mississippi, kevin.kuehn@usm.edu;


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