CAJ | 학술논문

2007年7月至2008年5月,按季度对丹江口水库4个区域(丹江库区、汉江库区、取水口、五青入库区)14个采样点进行大型底柄动物调查.共采集到底栖动物61种,主要由寡毛类(颤蚓科、仙女虫科)和摇蚊科组成.其中,寡毛类密度在全年中占优势地位,占底柄动物总密度的90%以上;生物量的优势种则主要为软体动物.空间分布上,底栖动物密度以汉江库区最高(大坝前:33792ind./m~2),丹江库区次之,取水口和五青入库区的密度相对较低,且五青入库区偶尔出现0密度的样品;生物量则南于丹江库区和取水口经常有软体动物出现而导致该区域内生物量相对较高.季节变化上,密度分布为夏季＞春季＞秋季＞冬季;生物量也呈现出类似的分布,但秋季和冬季差别较小.采用Shannon-Wiener多样性指数、Goodnight-Whidey生物指数、Wright 生物指数及Carlander生物量法对丹江口水库水质进行评价,比较而言,GoodnightWhifley指数不适宜用于丹江口水库的水质评价;而综合利用其它三种方法进行评价的结果表明:取水口为轻污染状态,丹江库区为轻-中污染,汉江库区为中-重污染;五青入库区南于水深太浅,底栖动物生境易受外界影响导致群落波动较大,因此不宜采用底柄动物作为评价指标.
2007년7월지2008년5월,안계도대단강구수고4개구역(단강고구、한강고구、취수구、오청입고구)14개채양점진행대형저병동물조사.공채집도저서동물61충,주요유과모류(전인과、선녀충과)화요문과조성.기중,과모류밀도재전년중점우세지위,점저병동물총밀도적90%이상;생물량적우세충칙주요위연체동물.공간분포상,저서동물밀도이한강고구최고(대패전:33792ind./m~2),단강고구차지,취수구화오청입고구적밀도상대교저,차오청입고구우이출현0밀도적양품;생물량칙남우단강고구화취수구경상유연체동물출현이도치해구역내생물량상대교고.계절변화상,밀도분포위하계＞춘계＞추계＞동계;생물량야정현출유사적분포,단추계화동계차별교소.채용Shannon-Wiener다양성지수、Goodnight-Whidey생물지수、Wright 생물지수급Carlander생물량법대단강구수고수질진행평개,비교이언,GoodnightWhifley지수불괄의용우단강구수고적수질평개;이종합이용기타삼충방법진행평개적결과표명:취수구위경오염상태,단강고구위경-중오염,한강고구위중-중오염;오청입고구남우수심태천,저서동물생경역수외계영향도치군락파동교대,인차불의채용저병동물작위평개지표.
Macroinvertebrate was seasonally sampled at 14 sites of four regions(Regions Danjiang,Hanjiang,Wuqing,and the water intake)of the Danjiangkou Reservoir from July 2007 to May 2008.In total,61 taxa were collected,mainly including Oligochaeta(Tubificidae and Naididae)and Chironomidae.Oligochaeta was dominant in the density of the macroinvertebrate all through the year,with the relative abundance over90%.The dominant species of the biomass was,however,the Annelida.In the spatial distribution,the highest density appeared in Hanjiang region(adjacent to the dam:33792ind./m~2),and then in the Danjiang region.The densities in the water intake region and the Wuqing region were relatively low.For the biomass,it was relatively high in Danjiang and the water intake regions,for the appearance of some Annelida species.Seasonally,the density was highest in summer,and then higher in spring,autumn and winter.The trend of the biomass distribution was similar in seasons,with little difference between autumn and winter.Water quality was estimated by multiple methods of Shannon-Wiener diversity,GoodnightWhitley index,Wright index and the Carlander's biomass.By comparing all the assessment results,we could conclude that,Goodnight-Whitley index was not appropriate for the assessment of the water in Danjiangkon Reservoir.The assessment results by combining other three methods showed that.the pollution extent was weak in water intake region,intermediate in Danjiang region,interstrong in Hanjiang region.For Wuqing region,it wag not suitable to be estimated by macroinvertebrate,due to the shallow water depth and various macroinvetebrate community structures sensitively impacted by the water conditions.