scholarly journals The Use of Zooplankton Metrics to Determine the Trophic Status and Ecological Potential: An Approach in a Large Mediterranean Watershed

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2382
Author(s):  
Manuel E. Muñoz-Colmenares ◽  
María D. Sendra ◽  
Xavier Sòria-Perpinyà ◽  
Juan Miguel Soria ◽  
Eduardo Vicente
Keyword(s):  
Water Quality ◽  
Water Framework Directive ◽  
Environmental Variables ◽  
Trophic Status ◽  
Total Zooplankton ◽  
Important Place ◽  
Biological Quality ◽  
European Water ◽  
Quality Element ◽  
Ecological Potential

In the European Water Framework Directive, zooplankton was not included as a Biological Quality Element despite its important place in the aquatic trophic web. In the present study on zooplankton abundances and biomasses, we used several metrics to test their ability to detect differences among trophic statuses and ecological potential levels, and collected a large sum of data in more than 60 reservoirs at Ebro watershed, on more than 300 sampling occasions over 10 years. Our results indicate that most zooplankton metrics are correlated to environmental variables that determine reservoirs’ trophic states, especially chlorophyll a and total phosphorus. The metrics with better sensitivity to differentiate trophic states and ecological potential levels were ZOO (total zooplankton), LZOO (large zooplankton), CLAD (cladocerans), and ZOO:CHLA (zooplankton:chlorophyll a ratio). Microcrustacean metrics such as DAPHN (Daphnia), COP (copepods), CYCLO (cyclopoids), and CALA (calanoids) were good at differentiating between high and low water quality in trophic status (oligotrophic–eutrophic) and ecological potential (good or superior–moderate). Thus, zooplankton can be used as a valuable tool to determine water quality; we believe that zooplankton should be considered a Biological Quality Element within Water Framework Directive monitoring programs for inland waters.

Trophic conditions in rivers and streams – significance for biological quality elements of the European Water Framework Directive

2013 ◽  
Vol 8 (1) ◽  
pp. 41-46
Author(s):  
Michael Weyand ◽  
Theresia Döppner ◽  
Petra Podraza
Keyword(s):  
Water Framework Directive ◽  
Trophic Status ◽  
Influencing Factor ◽  
Benthic Invertebrate ◽  
Water Bodies ◽  
European Water Framework Directive ◽  
Trophic Conditions ◽  
Biological Quality ◽  
Biological Quality Elements ◽  
European Water

In the past, saprobic and trophic conditions were both used as indicators to assess and monitor the quality of surface water bodies. Now, with the introduction of the European Water Framework Directive (WFD), the focus in the assessment of aquatic systems has shifted towards better integration of biocoenotic parameters, expressed as biological quality elements. With this change, saprobity is still used, at least as partially, in the evaluation of benthic invertebrate fauna. The term ‘trophic status’, however, no longer appears as a separate criterion. It is the aim of this paper to show that all quality components depend to a greater or lesser extent on the water bodies' trophic status, so that this term will maintain its significance as a key influencing factor.

scholarly journals Can zooplankton species be used as indicators of trophic status and ecological potential of reservoirs?

2021 ◽  
Author(s):  
Manuel E. Muñoz-Colmenares ◽  
Juan M. Soria ◽  
Eduardo Vicente
Keyword(s):  
Water Quality ◽  
Trophic Status ◽  
Ecological Status ◽  
Zooplankton Species ◽  
Keratella Cochlearis ◽  
Physical And Chemical Variables ◽  
Daphnia Cucullata ◽  
Good Ecological Status ◽  
Physical And Chemical ◽  
Ecological Potential

AbstractThe European Water Framework Directive implements the policies to achieve a good ecological status of all European waterbodies. To determine the ecological potential in freshwater environments, abiotic (morphology, physical and chemical variables) and biotics (algae, fishes, etc.) metrics are used. Despite their importance in trophic web, zooplankton was not included as one of the Biological Quality Elements (BQE) to determine the water quality. In the present research, we studied the zooplankton species that can be considered as indicators of trophic status and ecological potential for more than 60 water reservoirs. The data were obtained from more of 300 samples collected during 10 years from reservoirs at Ebro River watershed, which is the largest basin in Spain. According to their physicochemical and biological elements, the trophic status and ecological potential of these reservoirs were established. More than 150 zooplankton species were identified during the study. The results from this research indicate that species that are related with low water quality are: Acanthocyclops americanus, Ceriodaphnia spp., Daphnia cucullata, Daphnia párvula, Diaphanosoma brachyurum, Brachionus angularis, Keratella cochlearis and Phompolyx sulcata. An indicator of moderate quality was Bosmina longirostris, while Daphnia longispina, Ascomorpha ovalis and Ascomorpha saltans were considered as indicators of good water quality. The data obtained suggest that zooplankton species can be used as a valuable tool to determine the water quality status and should be considered, in a near future, as one more of the BQE within the WFD metrics.

Measures and costs of integrated river basin management - the Wupper example

2002 ◽  
Vol 46 (6-7) ◽  
pp. 47-53 ◽  
Author(s):  
G. Kolisch ◽  
J. Londong ◽  
J. Renner
Keyword(s):  
Water Quality ◽  
Water Framework Directive ◽  
River Basin ◽  
River Basin Management ◽  
Cost Estimate ◽  
Basin Management ◽  
European Water ◽  
Integrated River Basin Management ◽  
Additional Costs ◽  
Time Required

The implementation of the European Water Framework Directive entails additional costs in the areas of management, monitoring and water quality. As a first estimate, an attempt is made to assess the effects of implementation on the development of costs in a sub-basin, taking the Wupperverband as an example. The work and measures required are presented and the costs are assessed. On this basis, a cost estimate for the maximum time required for the implementation of the WFD is made. This takes into account all the relevant tasks in the area of the association with respect to rivers.

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