Volume : 3, Issue : 1, JAN 2017

VARIATIONS OF PHOTOSYNTHETIC PIGMENTS OF THE SPECIE NAJAS MARINA RELATED TO THE WATER QUALITY IN THE OPPOSITE SHORE OF SKADAR LAKE

ALBANA TEMALI, ARIANA YLLI ( KRAJA)

Abstract

Skadar Lake is the largest natural shallow lake on the Albanian-Montenegro border. Approximately two-third ( 229 km²) of the lake lies in Montenegro and one third(142 km²) lies in Albania. The lake has a particular water regime causing water level fluctuations. This changes the shore line generating a unique landscape type with wetlands and numerous aquatic habitats. Skadar Lake is known as a hight biodiversity ecosystem. According to the autors the submergedand emersed macrophysics are the most characteristic features of the littoral in Skadar Lake. The most important association of the vegetation type are Najadetum marinae, Potameum perfoliati, Potametum lucem, Potameto-Najadetum, Myriophyllo-Nupharetum lutei, Trapetum natantis, Phragmitetum australis, Thyphaetum latifolia. Submersed macrophytes are more developed in the eastern part of the lake which go as for as 3 m deep such P.perfoliatum, P.lucens, Vallisneria spirals, Najas marina, Najas minor, Ranunculus trichophyllus. Submerged macrophytes constitute the food base of fish in Skadar Lake . One of the most important associations is Najadetum marinae dominated by Najas marina occurring at the depth 2-3m . Najas marina was found as a part of the association Najadetum marinae in three sampling points (stations) during the year 2014. In the field was measured temperature and ph. Samples of water were used for determination of orthophosphates and nitrites. It was made determination of photosynthetic pigment of Najas marina specie collected in western and eastern stations. At a general conclusion be stated that the shore lines differentiate in the concentration of nutrients and in the content of the photosynthetic pigment of the same Najas marina sp.

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