Next Article in Journal
Estimation of Fractal Dimension of Suspended Sediments from Two Mexican Rivers
Previous Article in Journal
Study on Hydrochemical Characteristics and Formation Process of Antu Mineral Water in Changbai Mountain, China
Previous Article in Special Issue
Improving Environmental DNA Sensitivity for Dreissenid Mussels by Targeting Tandem Repeat Regions of the Mitochondrial Genome
 
 
Article

Ecological Quality Assessment of Greek Lowland Rivers with Aquatic Macrophytes in Compliance with the EU Water Framework Directive

1
Department of Biology, University of Patras, University Campus, 26504 Rio, Greece
2
Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, 46.7 km of Athens—Sounio Ave., Anavyssos, 19013 Attiki, Greece
3
Department of Biology, National and Kapodistrian University of Athens, 15701 Athens, Greece
*
Authors to whom correspondence should be addressed.
Academic Editor: Yongjiu Cai
Water 2022, 14(18), 2771; https://doi.org/10.3390/w14182771
Received: 27 July 2022 / Revised: 25 August 2022 / Accepted: 29 August 2022 / Published: 6 September 2022
Aquatic macrophytes are one of the four biological quality elements (BQE) used for assessing the ecological status of inland waters according to the EU Water Framework Directive (WFD 2000/60). With this article, we present the methodological approach for the implementation of a WFD compliant macrophyte index to the riverine systems of Greece. In addition to the definition and harmonization of the ecological quality class boundaries, the results from the pilot application of the index and the ecological classification of the monitored river reaches are also presented. Aquatic plants and environmental parameters were sampled from 93 river reaches between 2012 and 2015. A multivariate analysis with optimal scaling (MVAOS) was conducted to define the main stressor gradient and to identify the least disturbed sites and the reference conditions that are required for the derivation of the ecological quality classes. The Macrophyte Biological Index IBMR for Greek rivers (IBMRGR) was calculated for all the sites and the boundaries for the five quality classes were derived according to the methodology proposed by the Mediterranean Geographic Intercalibration Group (MedGIG). The main findings showed that the hydromorphological modifications were the main environmental stressors that correlated strongly with the IBMRGR, whereas physicochemical stressors were of lesser importance. More specifically, the first principal component explained 51% of the total variance of the data, representing a moderately strong gradient of hydromorphological stress, whereas the second component explained 22.5%, representing a weaker gradient of physicochemical stress. In addition, the ecological assessment showed that almost 60% of the sites failed the WFD target of the “Good” ecological quality class, which agrees with classification assessments based on other BQEs for Greece and many Mediterranean countries. Overall, this work provides a first assessment of the ecological classification of Greek rivers with the BQE of aquatic macrophytes with significant implications for ecological monitoring and decision making within the frame of the WFD implementation. View Full-Text
Keywords: aquatic macrophytes; Water Framework Directive; rivers; ecological quality; ecological monitoring; Eastern Mediterranean aquatic macrophytes; Water Framework Directive; rivers; ecological quality; ecological monitoring; Eastern Mediterranean
Show Figures

Figure 1

MDPI and ACS Style

Stefanidis, K.; Dimitrellos, G.; Sarika, M.; Tsoukalas, D.; Papastergiadou, E. Ecological Quality Assessment of Greek Lowland Rivers with Aquatic Macrophytes in Compliance with the EU Water Framework Directive. Water 2022, 14, 2771. https://doi.org/10.3390/w14182771

AMA Style

Stefanidis K, Dimitrellos G, Sarika M, Tsoukalas D, Papastergiadou E. Ecological Quality Assessment of Greek Lowland Rivers with Aquatic Macrophytes in Compliance with the EU Water Framework Directive. Water. 2022; 14(18):2771. https://doi.org/10.3390/w14182771

Chicago/Turabian Style

Stefanidis, Konstantinos, Georgios Dimitrellos, Maria Sarika, Dionysios Tsoukalas, and Eva Papastergiadou. 2022. "Ecological Quality Assessment of Greek Lowland Rivers with Aquatic Macrophytes in Compliance with the EU Water Framework Directive" Water 14, no. 18: 2771. https://doi.org/10.3390/w14182771

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop