1993년 11월부터 1994년 2월까지 서산 AB 간척지역 일대에서 관찰한 총 조류가 A지역에서는 53종 407,411개체였고, B지역에서는 46종 260,557개체였다. 그 중 A지역에서는 청둥오리, 흰뺨검둥오리, 가창오리 순으로 우점종이였으며, B지역에서는 청둥오리, 흰뺨검둥오리, 흰죽지 순이였다. 희귀종이며 국제조류보호대상종인 황새 5개체와 약 30,000 개체정도의 가창오리, 그리고 노랑부리저어새 15개체가 관찰되었다. 종다양도 지수(H`)는 A지역이 0.915, B지역이 0.815로 나타났다. 호수 및 주변에서 채집된 동물체는 12종이였고, 식물은 16종이였다. 우점종은 붕어, 미꾸라지, 잉어, 말뚝망둥어 순이였으며, 식물은 재배 식물인 벼와 갈대, 갯잔디 등의 순이였다. 간척지 호수내의 염분 농도는 A지역이 2,874ppm으로 B지역의 1,830ppm 보다 높았으며 이들 염분농도는 조류의 총 개체수와는 무관하였다. 지속적인 조사와 보호관리대책이 강구되어야 할 것이다.

The aim of this survey was to investigate the effect of wintering birds ecology according to the reclamation A and B area at Seosan, Korea. Bird Censuses were taken from October 1993 to March 1994 in reclaimed A and B area at Seosan, Chung-Nam Province. The survey area is located at 126˚ 25` E, 36˚30` N. The average temperature was 4.8℃ (the highest 12.8℃ in October and the lowest -0.3℃ in January) and the monthly average of rainfall was 24.14㎜ (the highest 29.5㎜ in December and the lowest 3.4㎜ in January). The total number of the birds we spotted were 667,968 birds of 53 Species - 407,411 birds of 52 species in area A and 260,557 birds of 46 species in area B. In area A, Anal platyrhynchos was the most dominant species, followed by Anas poecilorhyncha, and then Anas formosa. The most dominant species was Anas plarythynchos, followed by Anas poecilorhyncha, and then Aythya ferina in area B. Among all the birds, the representative rare species were 5 White Stocks Ciconia boyciana, about 30,000 Baikal teal Anal formosa and 15 Spoon-bill Platalea leucorodia. The index of bird species diversity was 0.925 - at area A was 0.915 and area B was 0.815. The index of birds of equally common species in area A (2.494) was slightly higher than that of area B(2.360). The percentage of species dominance shows relative density in each species. Also, the ecological survey carried out to investigate the animals and plants in freshwater reservoir and its surroundings. We collected 12 animal species and 16 plant species in the survey area. The most dominat animal species was the Carassius carassius followed by Misgurus anguillicaudatus, and the third was Cyprinus carpio. On the other hand, the most dominant plant species was the Oryza sativa followed by Paragmmites longivalvis, and the third was the Zoysia sinica. Salinities of B area(2,870ppm) was more higher than that of area A(1,830ppm). We found that the total number of birds was not affected by the salinities of reservoir (f=0.22, df=6, p>0.05).