ABB  Vol.2 No.4 , August 2011
Evaluation of the trophic state in Vilun lagoon
ABSTRACT
In this paper we present the evaluation of trophic state of lagoon aquatic ecosystems connected to the Adriatic Sea. Vilun lagoon is one of these lagoons in Albania. It is one of the most important ecosystems in the country. For trophic state evaluation, spectrophotometry methods of absorption, as well as turbidimetry ones are applied. This ecosystem is monitored for a year from April to October. The evaluation of trophic state is based on these four indicators: the containment of chlorophyll a in phytoplankton; the distribution of photosynthetic pigments; water turbidity and phosphorus containment in water. The monitoring process is performed in different areas of the lagoon, in order to be able to make a more characteristic evaluation of trophic state. All selected areas of Vilun lagoon show a reasonable level of trophic state, which is characterized such as being mezotrophic. Changes related to trophic level are observed during the monitoring period, in each and all the selected areas. Furthermore, changes in the distribu-tion of chlorophylls and their relative content between selected areas are observed.

Cite this paper
nullÇako, V. and Babani, F. (2011) Evaluation of the trophic state in Vilun lagoon. Advances in Bioscience and Biotechnology, 2, 311-314. doi: 10.4236/abb.2011.24045.
References
[1]   Ston, J. & Kosakowska, A., (2000) Qualitative and quantitative analysis of Baltic phytoplankton pigments. Oceanologia, 42, 449-471.

[2]   Sandres, R., Jickells, T, & Mills, D. (2001) Nutrientsand chlorophyll at two sites in the Thames plume and southern North Sea. Journal of Sea Research, 46, 13-28.

[3]   Jeffery S. W., Humphrey G. F. (1975) New spectrophotometric equation for determining chlorophyll a, b, c1 and c2. Biochem, Physiol. Pflanz, 167, 194 – 204.

[4]   Vidal, M., Duarte, C.M. & Sanchez, M.C. (1999) Coastal Eutrophication Research in Europe: Progress and Imbalances. Marine Pollution Bulletin, 38, 851-854.

[5]   Lorenzen, C. J. (1967). Determination of chlorophyll and phaeopigments: spectrophotometric equations, Limnol. Oceanogr., 12.

[6]   USEPA Method 446.0. (1997). In vitro Determination of Chlorophylls a, b, c1 + c2 and Pheopigments in Marine and Freshwater Algae by Visible Spectrophotometry, 26 pp.

[7]   Schlüter, L., Mohlenberg, F., Havskum, H. & Larsen, S. (2000) The use of phytoplankton pigments for identifying and quantifying phytoplankton groups in coastal areas. Marine Ecology Progress Series [Mar Ecol Prog Ser], 192, 49-63.

[8]   Lichtenthaler, H. K.. (1987) Chlorophylls and carotenoids, the pigments of photosynthetic biomembranes. Methods Enzymol., 148, f.350-382.

[9]   Jarry V., Frisoni G. F. & Legendre P. (1991) Spatial organization of a lagoon phytoplankton population under marine and continental influences. Oceanol. Acta, 14(5), 473-488.

[10]   Babani F., Kongjika E., Mullaj A. (2004). Photosynthetic pigments of phytoplankton. Of some Adriatic lagoons, Biological Studies, Tirana, 78-84.

[11]   Gotsis S.O. and Friligos N., 1990. Contribution to eutrophication and Phitoplankton ecology in the Theramikos Gulf. Thalassographica., 13, 1-12.

 
 
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