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| Written by  Published in: Publikační činnost ENKI
  • Pacini, N., Pechar, L., & Harper, D. M. (2019). Chemical Determinands of Freshwater Ecosystem Functioning. In Freshwater Ecology and Conservation: Approaches and Techniques (Vol. Library od Congress Conttrol Number: 2018948522, pp. 89). Oxford: Oxford University Press.

Chemical equilibria in surface waters stem from complex interactions between physical background and living components of ecosystems. Catchments differ in geological background, climate, and land use; their run-off bears a distinctive chemical ‘fingerprint’. This chapter illustrates how the monitoring of standard parameters, such as oxygen, pH, conductivity, major ions, nutrients, and carbon, can lead to an interpretation of key aspects of the functioning of major ecosystem processes and how chemical constituents may affect the distribution of aquatic organisms. This requires understanding principles that underlie available measurement techniques and it demands a certain familiarity with the intrinsic variability of parameter values and of their chemical interaction. It is not required that field scientists be able to conduct detailed chemical assessments, but all should be able to collect samples yielding high-quality data. Therefore, detailed advice on chemical monitoring practice is provided, including sample collection, filtering, sample processing, and is discussed with the context of several case studies.