The lower reaches of the Yangze River is one of the central areas of freshwater shallow lakes in China and has the diverse climates with both warm temperate zone and sub-tropical zone,which makes it become one of the ...The lower reaches of the Yangze River is one of the central areas of freshwater shallow lakes in China and has the diverse climates with both warm temperate zone and sub-tropical zone,which makes it become one of the best areas for aquaculture,so nearly all of the aquaculture species from the world can live in the area.It is important for perfecting alien aquaculture species information data-base and environmental risk assessment system to investigate and study the aquaculture alien species in the lower reaches of the Yangze River.The results showed that the number of aquaculture alien species in the lower reaches of the Yangze River is 45 species,including 33 species of fishes,4 species of shellfish,7 species of crustaceans and 1 species of amphibian.Most of alien species are from America and the main transmitting way is intentional introducing.展开更多
Using the method of trophic state-composite index(TSI-CI)and the 12 months of monitoring data in 2010,we carry out initial exploration of the status of ecosystem health in Wuli Lake.First,we select four indicators,Chl...Using the method of trophic state-composite index(TSI-CI)and the 12 months of monitoring data in 2010,we carry out initial exploration of the status of ecosystem health in Wuli Lake.First,we select four indicators,Chla,SD,TP and TN,to conduct trophic state assessment using weighted index method;then after selecting physical,chemical and biological indicators to conduct nondimensionalization processing,we calculate the composite index and conduct comprehensive assessment.The results show that in 2010,the status of ecosystem health in Wuli Lake was the best in July,worst in August;when the composite trophic state indicators with Chla as the representative increase or decrease significantly and cross different nutritional grades,TSI will significantly deviate from CI,and the relationship between the two in the other time is not prominent.展开更多
基金Supported by Special Funds for Basic Research and Operating Ex-penses in Central Nonprofit Research Institutes (Chinese Academyof Fishery Sciences) "Investigation and Analysis of Aquatic Invasivein Middle and Lower Reaches of the Yangtze River Basin "(2007B006)
文摘The lower reaches of the Yangze River is one of the central areas of freshwater shallow lakes in China and has the diverse climates with both warm temperate zone and sub-tropical zone,which makes it become one of the best areas for aquaculture,so nearly all of the aquaculture species from the world can live in the area.It is important for perfecting alien aquaculture species information data-base and environmental risk assessment system to investigate and study the aquaculture alien species in the lower reaches of the Yangze River.The results showed that the number of aquaculture alien species in the lower reaches of the Yangze River is 45 species,including 33 species of fishes,4 species of shellfish,7 species of crustaceans and 1 species of amphibian.Most of alien species are from America and the main transmitting way is intentional introducing.
基金Supported by Project of Wuxi Municipal Development and Reform Commission(2115019)
文摘Using the method of trophic state-composite index(TSI-CI)and the 12 months of monitoring data in 2010,we carry out initial exploration of the status of ecosystem health in Wuli Lake.First,we select four indicators,Chla,SD,TP and TN,to conduct trophic state assessment using weighted index method;then after selecting physical,chemical and biological indicators to conduct nondimensionalization processing,we calculate the composite index and conduct comprehensive assessment.The results show that in 2010,the status of ecosystem health in Wuli Lake was the best in July,worst in August;when the composite trophic state indicators with Chla as the representative increase or decrease significantly and cross different nutritional grades,TSI will significantly deviate from CI,and the relationship between the two in the other time is not prominent.
