Spatial Distribution and Seasonal Variations of Aquatic Plants in Nam Oun Reservoir, Sakon Nakhon Province, Thailand

Authors

  • Somsak Rayan Rajamangala University of Technology Isan
  • Amornrat Rangsiwiwat
  • Sugunya Kumla
  • Boonthiwa Chartchumni

Abstract

Spatial and seasonal variations of aquatic plants were investigated from November, 2013 to October, 2014 in Nam Oun reservoir, Sakon Nakhon province, Thailand. Samplings of aquatic plants were conducted in 4 hydrological seasons, total of 6 stations, within 3 zones. Altogether, 57 species and 31 families were recorded and categorized into floating, emergent, submerged and marginal (8, 3, 7, and 39 species, respectively). Variations of species and abundance of macrophytes were surveyed (station*season). The seasons had significantly affected on biomass of aquatic plants (p<0.05). M. pigra L., U. aurea Lour. and E. dulcis Burm.f. were the most commonly found aquatic plants and had the highest biomass. The rainy season (T4) had the most diverse species. However, the highest biomass was observed during rainy to dry season (T1). Cluster analysis was used to determine biomass on seasons, which resulted in 3 major clusters. Marginal type of aquatic plants can be found in all groups, and reservoir area. Keywords :  aquatic plant, diversity, distribution, multi-variation analysis

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Published

2017-09-15