VARIATION OF ENVIRONMENTAL PARAMETERS AND DYNAMICS OF PHYTOPLANKTON IN A TEMPERATE EUTROPHIC RESERVOIR (TORRAO, TAMEGA RIVER, PORTUGAL)

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Elisa Pereira (Author) Other; Filipe Oliva Teles (Author) FCUP; Vitor Vasconcelos (Author) FCUP

Journal

Title: Fresenius Environmental Bulletin

Vol. 17

Pages: 2193-2199

ISSN: 1018-4619

Publisher: Technische Universitat Munchen

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 7 Citations

Scientific classification

FOS: Natural sciences > Earth and related Environmental sciences

Other information

Authenticus ID: P-004-39M

Abstract (EN): Reservoir water quality may change along time due to management measures or their absence but also may change significantly during a single year. In this study we compared the quality of the water in two sites of a reservoir in north Portugal: one in the river flowing into the reservoir and another in the reservoir at a deep site. Torrao reservoir in Tamega River is used for electricity production being also an important as a drinking water source and for recreation. Physical, chemical and biological parameters were analyzed during, a three-year sampling program. Statistical analysis allowed us to compare surface data of these two sites and data from three depths in the reservoir. A seasonal occurrence of cyanobacteria blooms in the reservoir was registered with a succession of two main species: Aphanizomenon flos-aquae and Microcystis aeruginosa. Loads of N and P seem to be a key factor for this succession. Reduction of N and P together with aeration of the deep water to prevent anoxia and destabilize the water column may be effective measures to reduce eutrophication and prevent the occurrence of toxic cyanobacteria blooms.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7