Resumen

The present study on Doodh Ganga and Khansha-Mansha streams of Yusmarg forests deals with the general ecological studies on periphytic algal community in terms of species composition and density. During the present investigation the periphytic algal community of Doodh Ganga and Khansha-Mansha streams were represented by 30 taxa which belonged to 4 major classes namely Bacillariophyceae (14), Chlorophyceae (11), Cyanophyceae (4) and Euglenophyceae (1). The most common periphytic species encountered across all the sites included Closterium sp., Zygnema sp., Amphora sp., Cymbella sp., Epithemia sp., Fragilaria sp., Navicula sp., Synedra sp., Tabellaria sp., Lyngbya sp. and Phormidium sp. Among the two streams, Doodh Ganga showed large number of taxa (45) and Khansha-Mansha was having 37 taxa of periphyton. Bacillariophyceae was the dominant group both in diversity and density and included 14 taxa contributing 57% of total periphytic algal population. Cyanophyceae forming the second dominant class was represented by 4 genera comprising 22% of the total periphytic algae. Chlorophyceae ranked third in its dominance pattern with 11 genera forming 20% of all the periphytic algae. Euglenophyceae was represented by only one species of Euglena sp. forming 1% of all the periphytic algae and found only at site2 (Doodh Ganga downstream).Amongst the study sites the highest (5.69) value of Shannon Weiner Index was found at Doodh Ganga upstream while as lowest (4.38) at Khansha-Mansha downstream. The primary conclusion is that the streams, having crystal clear water, and are free from pollution as Chlorophyceae are better represented in both the streams. Further, as a result of less anthropogenic pressures the quality of water is fairly good.

Palabras clave: Periphyton Doodh Ganga Khansha-Mansha Bacillariophyceae Chlorophyceae Cyanophyceae Yusmarg.

2013-11-14   |   869 visitas   |   Evalua este artículo 0 valoraciones

Vol. 5 Núm.1. Junio 2013 Pags. 9-19 Ecologia Balkanica 2013; 5(1)