2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/21/2018  |   10:00 AM - 10:15 AM   |  PERIPHYTON FUNCTIONAL PARAMETERS AS INDICATORS OF PHOSPHORUS ENRICHMENT ALONG AN AGRICULTURAL IMPACT GRADIENT IN CENTRAL PENNSYLVANIA   |  330 A

PERIPHYTON FUNCTIONAL PARAMETERS AS INDICATORS OF PHOSPHORUS ENRICHMENT ALONG AN AGRICULTURAL IMPACT GRADIENT IN CENTRAL PENNSYLVANIA

The capacity to reliably assess the functional integrity of stream ecosystems is at the heart of stream assessment and restoration. However, direct measures of ecosystem function are often cumbersome, expensive and have not been used widely enough to develop predictive models relating functional indicator responses to the myriad of potential stressors. The goal of this project was to utilize a suite of "rapid" assessment protocols targeted at algal-dominated stream periphyton to examine responses in 20 stream ecosystems spanning a phosphorus gradient in an agricultural region of central Pennsylvania. We measured nitrogen and phosphorus uptake in portable mesocosms, photosynthetic capacity using pulse amplitude modulated fluorometery and extracellular enzymes (beta-glucosidase, beta-xylosidase, alkaline phosphatase, leucine-aminopeptidase, beta-N- acetylglucosaminidase and phenol oxidase). Our results indicate that, although stream size, community type, and the local physical environment are potentially important covariates, these "rapid" protocols for characterizing periphyton function responded well to variations in phosphorus concentrations and in combination may serve as robust indicators of nutrient demand in agriculturally impaired streams.

  • Biofilm
  • Phosphorous
  • Assessment

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Presenters/Authors

Steven Rier (), Bloomsburg University, srier@bloomu.edu;


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Jennifer Soohy (), Bloomsburg University, jat18435@huskies.bloomu.edu;


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Corey Conville (), Bloomsburg University, cjc37025@huskies.bloomu.edu;


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Aaron Gordon-Weaver (), Bloomsburg University, amg43366@huskies.bloomu.edu;


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