Journal of Lake Sciences 

About: Journal of Lake Sciences is an academic journal published by Science Press. The journal publishes majorly in the area(s): Environmental science & Biology. It has an ISSN identifier of 1003-5427. It is also open access. Over the lifetime, 2379 publications have been published receiving 9245 citations. The journal is also known as: Scientia Limnologica Sinica.

Approaches to Mechanisms and Control of Eutrophication of Shallow Lakes in the Middle and Lower Reaches of the Yangze River

Abstract: The middle and lower reaches of the Yangtze River are one of the central areas of freshwater shallow lakes in China. Most of the lakes have been under mesotrophic or eutrophic conditions, the latter are especially common in urban lakes. Human activities have played a key role in the eutrophication process from at least two aspects: continuous effluents of industrial, agricultural and domestic wastewater could add nutrient to the lake; and reclamation, stone built dikes, cultivation could damage natural habitats and reduce nutrient output from the lake. The seriousness of eutrophication has aroused attention of national government. Two of the "Three Lakes" Water Pollution and Prevention Control Program that give priority to the Tenth Five Year Plan of China are situated in the plain, i.e., Taihu Lake and Chaohu Lake. The nutrient status has been under a relative high level in most lakes. The eco environmental questions in lakes are conspicuous even though local governments have taken some measures to prevent further environmental deteriorations. Steps dealing with external nutrient loadings have achieved good results in deep lakes internationally, while they are no longer so effective in shallow lakes, because we lack a through understanding of mechanisms of eutrophication in shallow lakes.World acknowledged experiences of shallow lakes eutrophication control have proved that eutrophication still prevails even though area source nutrient loading to the lake could be reduced to a minimum level. Internal sources from the sediment may certainly relate to the maintenance of eutrophication. The kinetics of water could re suspend sediments, and effect the nutrient release process, underwater light intensity and primary production as well. To control eutrophication in shallow lakes must take both external loading of nutrient and internal loading into consideration. One of the effective measures for internal loading is the restoration of aquatic plants in order to inhibit the re suspension and sediment release. Researches on the experimental ecological restoration and functions of ecosystem deterioration are needed. As a result, external control on nutrient source pollution is not enough in shallow lakes; internal nutrient within lakes must be emphasized. Two techniques have been applied in internal loading control, i.e., dredging and macrophytes restoration. The former requires a complete knowledge on the trophic history in lake ecosystem so that an exact schedule on the scope and depth of dredging could be determined lest newlyexposed sediments become fresh internal release source. The latter could inhibit sediment suspension under dynamic conditions, and absorb nutrient within lakes so as to diminish nutrient load as well. Macrophytes flourishing and algae bloom outbreak are two aspects of eutrophication in lakes. Why macrophytes dominated lake could be evolved into an algae dominate one? How to revolve the process? Future macrophytes restoration must answer them. Researches abroad prove that a macrophytes dominated lake could be turned into an algae dominated one under strong external disturbances and steady high lake level; once algae dominated, the lake would come to another steady state for nutrient cycling. To restore macrophytes and get cleaner water, this cyclic process must be broken down.Consequently, it is strongly recommended that researches on the mechanisms and control of eutrophication in shallow lakes be initiated, so that a theoretical and technical basis could be provided for future launching national programs on eutrophication control in China.

Lake status,major problems and protection strategy in China

Abstract: Large numbers of lakes with different types are distributed through China.The formation and evolution of the lakes are not only influenced by natural factors in the watersheds,but also deeply disturbed by human activities,which led to different regional evolution characteristics and eco-environmental problems.In recent decades,the number,area and distribution of the lakes have undergone significant changes.Moreover,the lakes are facing many problems such as shrinkage,reduction of storage capacity,water quality decline,serious eutrophication,biodiversity decrease,ecological degradation,barrier of river and lake water and ecological contact,over-development around the shore line and the lake area,etc.These problems have triggered a series of ecological and environmental consequences,seriously affecting the daily lives of the residents and sustainable development of the economy.This paper aims to identify the number,area and distribution of the lakes in China with the area larger than 1km2,based on field survey and investigation.Combined with historical data of lake surveys and relative research results,the major ecological and environmental problems and regional characteristics of the lakes in recent decades are systematically analyzed,and the protection strategies for the lakes in China are proposed.

浮游植物叶绿素a测定的“热乙醇法”及其测定误差的探讨

Abstract: Hot-ethanol extraction method is a widely used method in the world to determine phytoplankton chloro- phyll-a concentration.This paper aims to introduce the hot-ethanol extraction method in detail to all the scientists dealing with aquatic environment research in China.By experience from the authors,possible error during the oper- ation of the analysis was discussed.

Eutrophic status and causing factors for a large, shallow and subtropical Lake Taihu, China

Abstract: As the third largest freshwater lakes of China and seriously suffered by Microcystis algal bloom in recent 20 years, Lake Taihu's eutrophic status had been analyzed based on the monthly monitoring data in recent S years. The analysis indicated that eutrophication of Lake Taihu became more and more serious since 2000. Comparing to the mean values in recent S years, the water quality variables like total nitrogen, total phosphorus, and transparency, water quality of Lake Taihu were worse than that between 1991 and 2001. The summer mean of TN between 2002 and 2006 was significantly higher than that of between 1992 and 2001 (p = 0.005). And the transparency mean of summer of 2002-2006 in center of Lake Taihu was only 0.34 m, which was significantly lower than that of 1992-2001 with a mean 0.63 m (p = 0.003). Moreover, Microcystis blooming areas in summer increased from about one fourth of the lake before 2000 to over half of the lake in 2006. Blooming season from June to October before 2000 also extend from May to December in 2006. Microcystis blooms occur more and more regularly in the lake. And dominant areas of submerged macrophytes decreased quickly. The deteriorate trend of eutrophication in Lake Taihu may partly due to the abnormal dry and hot climate in recent 2 years. However, destroy of submerged macrophytes also possibly contributed to the fast widespread of bloom.

Synopsis of freshwater fishes of China

Abstract: Water albedo of fish pond has close relation with its physico-chemical features. As compared with most other free actual surfaces. w,ter surface in thisregion is characterized by lower reflection ratio and higher absorption. Except the features of reflection ratio on general water surfaces, the reflection ra ratio on fish ponds has good negative ralation with productivity of phytoplankton in the fish ponds this reason, utilization ratio of light energy has positive relaiton with primary productivity in fish ponds.