4.4 Article

A Low-Cost Method of Measuring the In Situ Primary Productivity of Periphyton Communities of Lentic Waters

Journal

JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
Volume -, Issue 190, Pages -

Publisher

JOURNAL OF VISUALIZED EXPERIMENTS
DOI: 10.3791/64078

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Funding

  1. Czech Science Foundation [GACR 19-05791S, RVO 67985939]
  2. CAS within the program of the Strategy AV 21, Land save and recovery

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Measuring in situ primary productivity of periphyton during the growing season gradient can provide insights into the quantitative effect of environmental drivers and species composition. Using noninvasive oxygen sensors for real-time measurement allows for accurate monitoring and understanding of primary productivity dynamics.
Measuring the in situ primary productivity of periphyton during the growing season gradient can elucidate the quantitative effect of environmental drivers (mainly phosphorus concentration and light intensity) and species composition on primary productivity. Primary productivity is mainly driven by light intensity, temperature, availability of nutrients, and distribution of the ionic species of the carbonate system in the respective depths of the euphotic zone. It is a complex system that is very difficult to simulate in the laboratory. This cheap, transportable, and easy-to-build floating barge allows measuring the primary productivity accurately-directly under the actual natural conditions. The methodology is based on measuring the primary productivity in real time using noninvasive oxygen sensors integrated into tightly sealed glass jars, enabling online oxygen flux monitoring and providing new insights into metabolic activities. Detailed seasonal in situ measurements of gross primary productivity of microbial mats (or other benthic organisms) can improve current knowledge of the processes controlling primary productivity dynamics in lentic waters.

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