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国际藻类期刊
SJR: 0.229 SNIP: 0.261 CiteScore™: 0.24

ISSN 打印: 1521-9429
ISSN 在线: 1940-4328

国际藻类期刊

DOI: 10.1615/InterJAlgae.v15.i1.30
pages 36-49

Diversity of Green Microalgae in the North-Eastern Areas of Pakistan

A. Zarina
Department of Botany, Federal Urdu University of Arts, Sciences & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
M. Shameel
Department of Botany, University of Karachi, Karachi-75270, Pakistan

ABSTRACT

Almost ninty-eight speices of algae with solitary or colonial organizations belonging to the phylum Volvophycota have been collected from various freshwater habitats in the north-eastern areas of Pakistan during January 2003 and December 2006. Among them three genera and 24 species were new records for Pakistan. As a result of this study, Desmidiophyceae showed greater diversity (68.42%) than the class Volvocophyceae (30.72%). Desmidiales appeared to be the most highly distributed order (60.78%), which was followed by Volvocales (27.98%) while the Chlorococcales and Chlorellales were poorly distributed orders (0.86; 2.63% respectively). Cosmarium (37.52%) was the most commonly occurring genus, which was followed by Closterium (23.17%) and next common were the genera Scenedesmus (17.32%), Pediastrum (3.35%) and Euastrum (2.23%). Poorly distributed genera were Chlorella, Chlorococcum, Crucigeniella, Eudorina, Gonium, Hydrodictyon, Pandorina and Volvox among the class Volvocophyceae and Cylindrocystis, Staurastrum from the class Desmidiophyceae (0.56% each). Hyalotheca, Netrium, Oocystis and Pleurotaenium were slightly better in their diversity (1.12% each). No epilithic, epipsammic or epipelic alga were collected. Almost 64.28% of the collected species were planktic, 31.64% were epiphytic, and only 4.08% were edaphic. Greatest proportions of algal collections (25.70%) were made from Lahore City and its neighboring areas, which was followed by Azad Kashmir (14.51%) and Sialkot (12.83%). The other districts from province of the Punjab such as Jhang (8.37%), Jauharabad (6.70%) and Gujranwala (6.70%) as well as Attock (7.25%) and Swat (5.60%) of Khyber Pakhtoonkhwa Province displayed low number of species. The poorest diversity was shown in the collections from the districts of Pasroor and Sargodha (1.70% each) in the Punjab Province. The largest number of collected species was found in winter (30.77%), their frequency of occurrence remained almost the same during spring and summer (25.64% each), and they were collected in smallest number in autumn (17.95%). The seasonally resistant most common genera were Closterium, Cosmarium, Hydrodictyon and Scenedesmus, which were found to grow in all the four seasons of the year. Crucigeniella, Netrium and Volvox were only collected during summer, Eudorina was only found in spring, Chlorococcum and Staurastrum occurred only during autumn. Species of these genera could not be collected during other seasons. The remaining genera were found in certain seasons of the year but remained absent during others.


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