达里湖水化学和水生生物学再调研  

Restudies on the Hydrochemistry and Hydrobiology of Dali Lake

作　　者：何志辉[1,2] 姜宏[1,2] 毕风山 

机构地区：[1]大连水产学院养殖系 [2]内蒙古克旗水电局

出　　处：《大连水产学院学报》1996年第2期1-13,共13页Journal of Dalian Fisheries University

摘　　要：达里湖位于内蒙古东部草原地带，面积２３８ｋｍ２，平均水深约６．７ｍ，是一个盐碱性湖泊，其湖沼学和渔业资源状况１９７５～１９７６年曾作过调查，本文报道１９９４年对其水化学和水生生物学再次调查的结果，并和１９７５～１９７６年材料加以比较。湖水的盐度（６．２４‰）、碱度（４４．８９ｍｍｏｌ／Ｌ）和ｐＨ值（９．６）分别较１９７５～１９７６年增高１２．４％、０．９％和１．８％。浮游生物的种类组成和平均生物量没有本质上的变化，但底栖动物的种数因河流水位降低而大为减少。Dali lake, located in a grassland in the east of Inner Mongolia, is an alkaline saline lake with an area of 238 km 2 and a mean depth about 6 0 m. The limnological conditions and fishery resource had been studied during 1975￣1976. This paper presents the restudies on the hydrochemistry and hydrobiology of this lake in 1994 and the results are compared with those in 1975￣1976. The salinity, alkalinity and pH value are 6 24‰, 44 89 mmol/L and 9 6, which are 12 4%, 0 9% and 1 8% higher than those in 1975￣1976, respectively. There are not essential changes in the species composition and the average biomass of plankton, but the number of zoobenthos is decreased owing to the lower water level of the rivers. The cause for the drop of fish yield in recent years and the potential fish productivity of the lake are discussed.

关 键 词：达里湖 水化学 水生生物学 

分 类 号：S913[农业科学—水产科学]