Community structure of aquatic plants in Bung Khong Long and Kut Thing, changwat Nong Khai
2002
Udomsri, C.(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Liberal Arts and Sciences. Program of Economic Botany) | Premcharoen, S.(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Liberal Arts and Sciences. Zoology Section)
Community structure of aquatic plants, water quality and sediment properties in Bung Khong Long non-hunting area and Kut Thing reservoir, Changwat Nong Khai, was investigated. The study was conducted from March 2001 to April 2002 by survey throughout the marshland and samples were taken at 5 different geographic sites. At least 70 species comprising 61 genera and 38 families were found in both locations (57 species in Bung Khong Long and 51 species in Kut Thing). Average aquatic plant biomass was highest in the rainy season at 377.40 dry weight g/square m for Bung Khong Long, and summer and rainy season biomasses (396.84 dry weight gram/square m, respectively) were higher than in winter at Kut Thing. The dominant group at both locations was that of the submerged plants such as Utricularia aurea, Hydrilla verticillata and Vallisneria spiralis. Water characteristics of Bung Khong Long were: average temperature 24.7 deg C, depth 1.72 m, transparency 1.57 m, pH 6.10, total N 0.423 mg/l and total P 0.546 mg/l. Water characteristics of Kut Thing were: average temperature 24.53 deg C, depth 1.93 m, transparency .82 m, pH 6.81, total N 0.337 mg/l and total P 0.788 mg/l. Properties of the sediment at Bung Khong Long: were average organic matter content 4.544 percent, pH 4.54, total N 0.324 percent, total P 0.014 percent and exchanged K 0.402 percent. Properties of the sediment at Kut Thing: were average organic matter content 6.278 percent, pH 4.64, total 0.575 percent, total P 0.038 percent and exchanged K1.373 percent.
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