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Ecotoxicological endpoints, are they useful tools to support ecological status assessment in strongly modified water bodies?
Sci Total Environ. 2016 Jan 15; 541:119-129.ST

Abstract

Although man-made reservoirs represent an important water supply source in countries where water scarcity has become a problem, little work has been done on the evaluation of their ecological status. Taking this in account, the general aim of this study was to assess the usefulness of ecotoxicological endpoints in the potential ecological status characterization of water reservoirs, with the purpose of their possible integration in evaluation programs developed under the Water Framework Directive (WFD). To achieve this purpose, a group of bioassays were selected to evaluate both water and sediment compartments at the Alqueva reservoir (the biggest from the Iberian Peninsula), with representative species from different taxonomic and functional groups: Vibrio fischeri, Thamnocephalus platyurus, Daphnia magna and Heterocypris incongruens. The ecotoxicological assessment showed that sublethal endpoints (e.g., luminescence, growth or reproduction), would be more useful and sensitive to identify toxicity patterns in this type of water body. In general, the results from this ecotoxicological toolbox agreed with the potential ecological status established according to the WFD, which indicates that the bioassays complement the ecological assessment. Furthermore, the use of an ecotoxicological approach can be extremely useful, especially in cases where the biotic indices are difficult to establish, such as in man-made reservoirs. However, when pollutant concentrations are very low, and/or when nutrients and organic matter concentrations are high, the two approaches do not fit, requiring further research to determine which organisms are more sensitive and the best biotic indices to use under those conditions.

Authors+Show Affiliations

Departamento de Tecnologias e Ciências Aplicadas, Escola Superior Agrária, Instituto Politécnico de Beja, 7800-295 Beja, Portugal; CIMA - Centro de Investigação Marinha e Ambiental, CIMA, FCT, Edifício 7, Piso 1, Universidade do Algarve, Campus Universitário de Gambelas, 8005-139 Faro, Portugal. Electronic address: ppalma@ipbeja.pt.Departamento de Tecnologias e Ciências Aplicadas, Escola Superior Agrária, Instituto Politécnico de Beja, 7800-295 Beja, Portugal.Departamento de Tecnologias e Ciências Aplicadas, Escola Superior Agrária, Instituto Politécnico de Beja, 7800-295 Beja, Portugal; LEAF - Centro de Investigação em Agronomia, Alimentos, Ambiente e Paisagem, Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26402482

Citation

Palma, P, et al. "Ecotoxicological Endpoints, Are They Useful Tools to Support Ecological Status Assessment in Strongly Modified Water Bodies?" The Science of the Total Environment, vol. 541, 2016, pp. 119-129.
Palma P, Ledo L, Alvarenga P. Ecotoxicological endpoints, are they useful tools to support ecological status assessment in strongly modified water bodies? Sci Total Environ. 2016;541:119-129.
Palma, P., Ledo, L., & Alvarenga, P. (2016). Ecotoxicological endpoints, are they useful tools to support ecological status assessment in strongly modified water bodies? The Science of the Total Environment, 541, 119-129. https://doi.org/10.1016/j.scitotenv.2015.09.014
Palma P, Ledo L, Alvarenga P. Ecotoxicological Endpoints, Are They Useful Tools to Support Ecological Status Assessment in Strongly Modified Water Bodies. Sci Total Environ. 2016 Jan 15;541:119-129. PubMed PMID: 26402482.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ecotoxicological endpoints, are they useful tools to support ecological status assessment in strongly modified water bodies? AU - Palma,P, AU - Ledo,L, AU - Alvarenga,P, Y1 - 2015/09/22/ PY - 2015/08/12/received PY - 2015/09/02/revised PY - 2015/09/02/accepted PY - 2015/9/25/entrez PY - 2015/9/25/pubmed PY - 2016/7/28/medline KW - Alqueva reservoir KW - Ecological potential status KW - Ecotoxicological tools KW - Risk assessment KW - Strongly modified water bodies SP - 119 EP - 129 JF - The Science of the total environment JO - Sci. Total Environ. VL - 541 N2 - Although man-made reservoirs represent an important water supply source in countries where water scarcity has become a problem, little work has been done on the evaluation of their ecological status. Taking this in account, the general aim of this study was to assess the usefulness of ecotoxicological endpoints in the potential ecological status characterization of water reservoirs, with the purpose of their possible integration in evaluation programs developed under the Water Framework Directive (WFD). To achieve this purpose, a group of bioassays were selected to evaluate both water and sediment compartments at the Alqueva reservoir (the biggest from the Iberian Peninsula), with representative species from different taxonomic and functional groups: Vibrio fischeri, Thamnocephalus platyurus, Daphnia magna and Heterocypris incongruens. The ecotoxicological assessment showed that sublethal endpoints (e.g., luminescence, growth or reproduction), would be more useful and sensitive to identify toxicity patterns in this type of water body. In general, the results from this ecotoxicological toolbox agreed with the potential ecological status established according to the WFD, which indicates that the bioassays complement the ecological assessment. Furthermore, the use of an ecotoxicological approach can be extremely useful, especially in cases where the biotic indices are difficult to establish, such as in man-made reservoirs. However, when pollutant concentrations are very low, and/or when nutrients and organic matter concentrations are high, the two approaches do not fit, requiring further research to determine which organisms are more sensitive and the best biotic indices to use under those conditions. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/26402482/Ecotoxicological_endpoints_are_they_useful_tools_to_support_ecological_status_assessment_in_strongly_modified_water_bodies L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(15)30674-4 DB - PRIME DP - Unbound Medicine ER -