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A Numerical index for evaluating phytoplankton response to changes in nutrient levels in deep Mediterranean reservoirs

Marchetto, Aldo and Padedda, Bachisio Mario and Mariani, Maria Antonietta and Lugliè, Antonella Gesuina Laura and Sechi, Nicola (2009) A Numerical index for evaluating phytoplankton response to changes in nutrient levels in deep Mediterranean reservoirs. Journal of Limnology, Vol. 68 (1), p. 106-121. ISSN 1723-8633. Article.

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DOI: 10.3274/JL09-68-1-11

Abstract

This paper proposes a new ecological index based on phytoplankton (MedPTI) as suggested by the European Directive 2000/60/CE, Water Framework Directive (WFD). The index is a useful tool to verify the impacts of eutrophication in Mediterranean reservoirs belonging to different categories of the WFD. Multiple data sets were employed to develop the MedPTI index. The calibration data set included data collected from 30 Sardinian reservoirs in 1994. A list of 44 selected taxa was obtained and used for index calculation. A second dataset including 48 averaged annual values from 10 reservoirs was used. Results showed good correlation between MedPTI and concentration of total phosphorus, which was the limiting nutrient in these reservoirs. The trophic classifications determined using the index agreed with the results from the OECD probabilistic model on the same series of data. Finally, the index was included in an international exercise to compare the definition of reference conditions and quality class boundaries against indices used in other Mediterranean countries.

Item Type:Article
ID Code:1656
Status:Published
Refereed:Yes
Uncontrolled Keywords:Eutrophication, Water Framework Directive, Mediterranean ecoregion
Subjects:Area 05 - Scienze biologiche > BIO/07 Ecologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:CNR, Istituto per lo studio degli ecosistemi
ISSN:1723-8633
Publisher Policy:Documento open access
Deposited On:18 Aug 2009 10:05

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