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Featured researches published by Yu Jinlei.


Journal of Lake Sciences | 2012

Characteristic of nitrogen stable isotope in Bellamya aeruginosa in different bays of Lake Taihu, China

He Hu; Yu Jinlei; Zhang Ming; Liu Zhengwen; Li Kuanyi

Nitrogen discharged into lake ecosystems typically has different nitrogen stable isotope ratios(δ15N) and measurement of δ15N in organisms can be useful indicators of anthropogenic impacts from the watershed.The δ15N values of Bellamya aeruginosa were investigated in four bays of Lake Taihu.Results showed that δ15N values in snail ranged from 6.9‰ to 18.1‰,with an average of 11.2‰.Snail δ15N values displayed a significant variation among four bays.The highest average value was found in Meiliang Bay(17.7‰),followed by Gonghu Bay(13.2‰),East Taihu(10.2‰) and Zhushan Bay(7.8‰).Our investigation suggested that both Meiliang Bay and Gonghu Bay have received tremendous amount of domestic sewage derived from increasing human activities.Therefore,its necessary to promote investment of sewage treatment plants in surrounding cities including Wuxi and Changzhou.Our research also indicated that Zhushan Bay,which is located in northwest part of Lake Taihu is mainly affected by agriculture non-point source pollution.So its necessary to reduce the use of fertilizers to improve the water quality of that bay.Nitrogen discharged into lake ecosystems typically has different nitrogen stable isotope ratios(δ15N) and measurement of δ15N in organisms can be useful indicators of anthropogenic impacts from the watershed.The δ15N values of Bellamya aeruginosa were investigated in four bays of Lake Taihu.Results showed that δ15N values in snail ranged from 6.9‰ to 18.1‰,with an average of 11.2‰.Snail δ15N values displayed a significant variation among four bays.The highest average value was found in Meiliang Bay(17.7‰),followed by Gonghu Bay(13.2‰),East Taihu(10.2‰) and Zhushan Bay(7.8‰).Our investigation suggested that both Meiliang Bay and Gonghu Bay have received tremendous amount of domestic sewage derived from increasing human activities.Therefore,its necessary to promote investment of sewage treatment plants in surrounding cities including Wuxi and Changzhou.Our research also indicated that Zhushan Bay,which is located in northwest part of Lake Taihu is mainly affected by agriculture non-point source pollution.So its necessary to reduce the use of fertilizers to improve the water quality of that bay.


Journal of Lake Sciences | 2012

Seasonal variations in the diets of Coilia ectenes taihuensis Yen et Lin in Gonghu Bay of Lake Taihu

Yu Jinlei; He Hu; Li Kuanyi; Chen Feizhou; Liu Zhengwen

Coilia ectenes taihuensis Yen et Lin(C.ectenes) is the dominant fish species in Lake Taihu,and the catch has been increasing with the eutrophication of Lake Taihu.In this study,in order to investigate the seasonal diets variations of C.ectenes in Gonghu Bay of Lake Taihu,we sampled the fish by gill net and analyzed bimonthly the gut contents of C.ectenes from April to December,2009.Meanwhile,selectivity for different food items was also analyzed for the purpose to study the food preference of the fish.The results showed that the food composition of C.ectenes varied from month to month.Zooplankton,fish larvae,shrimp and insects were found in the stomach contents of the fish,but zooplankton was the dominant food.Among the zooplankton species,Copepod was the main food in April with close mean percentages diet composition of Copepodite,Sinocalanus dorrii Brehm and Cyclops spp.In June,August and October,C.ectenes fed mainly on cladoceran with Moina spp.as the dominated mean percentage diet composition in June and Bosmina spp.in August and October,respectively.Small zooplankton composed the main percentage diet composition,such as Bosmina spp.and Moina spp.,in all sampling months.However,C.ectenes negatively selected Bosmina spp.for their food,but positively selected Moina spp.and other large-sized zooplankton species.But when Daphnia spp.and Leptodora kindti Focke were present in the sampling months,C.ectenes showed high selectivity for them.From this investigation,we can conclude that C.ectenes feed mainly on planktonic crustaceans,and showed high selectivity for large-sized zooplankton.Moreover,fish larvae,shrimp and insects may be their potential food for the fish when its total length is longer than 130mm.Different food items varied largely in fish food composition among different seasons.Studying on the diet composition of C.ectenes can help us understand the seasonal effects of C.ectenes on zooplankton community structures better,and provide evidences and foundations for making rational plans of fisheries and lake management.Coilia ectenes taihuensis Yen et Lin(C.ectenes) is the dominant fish species in Lake Taihu,and the catch has been increasing with the eutrophication of Lake Taihu.In this study,in order to investigate the seasonal diets variations of C.ectenes in Gonghu Bay of Lake Taihu,we sampled the fish by gill net and analyzed bimonthly the gut contents of C.ectenes from April to December,2009.Meanwhile,selectivity for different food items was also analyzed for the purpose to study the food preference of the fish.The results showed that the food composition of C.ectenes varied from month to month.Zooplankton,fish larvae,shrimp and insects were found in the stomach contents of the fish,but zooplankton was the dominant food.Among the zooplankton species,Copepod was the main food in April with close mean percentages diet composition of Copepodite,Sinocalanus dorrii Brehm and Cyclops spp.In June,August and October,C.ectenes fed mainly on cladoceran with Moina spp.as the dominated mean percentage diet composition in June and Bosmina spp.in August and October,respectively.Small zooplankton composed the main percentage diet composition,such as Bosmina spp.and Moina spp.,in all sampling months.However,C.ectenes negatively selected Bosmina spp.for their food,but positively selected Moina spp.and other large-sized zooplankton species.But when Daphnia spp.and Leptodora kindti Focke were present in the sampling months,C.ectenes showed high selectivity for them.From this investigation,we can conclude that C.ectenes feed mainly on planktonic crustaceans,and showed high selectivity for large-sized zooplankton.Moreover,fish larvae,shrimp and insects may be their potential food for the fish when its total length is longer than 130mm.Different food items varied largely in fish food composition among different seasons.Studying on the diet composition of C.ectenes can help us understand the seasonal effects of C.ectenes on zooplankton community structures better,and provide evidences and foundations for making rational plans of fisheries and lake management.


Journal of Lake Sciences | 2017

Contribution of allochthonous dissolved organic carbon to the carbon source of planktonic crustaceans in Lake Fuxian

Sun Huan; Zhang Yongdong; Yu Jinlei; Hu Jinrun; Liu Zhengwen; Su Yaling

Allochthonous dissolved organic carbon (DOC) is of importance in lake carbon stock, therefore, the contribution and pathways of allochthonous DOC to planktonic crustaceans deserves further study. A controlled experiment was performed through adding glucose labeled with δ13C in water from Lake Fuxian. By analyzing the samples of phytoplankton and zooplankton species, quantity and phospholipid fatty acid (PLFA) biomarkers and their carbon stable isotope, the contribution of allochthonous DOC to crustacean zooplankton carbon source was investigated. The results showed that after adding glucose, δ13C values of bacteria and planktonic crustaceans(Bosmina) increased rapidly from -16.28‰ to 5408.25‰ and -23.88‰ to 1974.7‰, respectively, where⁃ as the δ13C value of chlorophyceae increased from -27.07‰ to 342.44‰. The growth rate showed that bacteria and zooplankton firstly utilized the adding glucose. The δ13C values of bacteria, particulate organic matter (POM) and zooplankton increased sharp⁃ ly at the first day, moreover, the δ13C value of bacteria is much higher than that of zooplankton and POM. After the first day, δ13C values of bacteria and POM decreased, by contrast, zooplankton δ13C value increased slowly. This suggests that allochthonous DOC is firstly utilized by bacteria and form cell particles via the metabolism of bacteria. Subsequently, planktonic crustaceans can utilize allochthonous DOC by grazing cell particles.


Journal of Great Lakes Research | 2015

Sediment lipid biomarkers record increased eutrophication in Lake Fuxian (China) during the past 150 years

Zhang Yongdong; Su Yaling; Liu Zhengwen; Chen Xiangchao; Yu Jinlei; Di Xiaodan; Jin Miao


Limnologica | 2015

Long-chain n-alkenes in recent sediment of Lake Lugu (SW China) and their ecological implications

Zhang Yongdong; Su Yaling; Liu Zhengwen; Chen Xiangchao; Yu Jinlei; Di Xiaodan; Jin Miao


Archive | 2015

Method for quickly detecting standing stock of blue-green algae

Chen Feizhou; Guan Baohua; Yu Jinlei; Di Xiaodan


Archive | 2015

Method of purifying water quality through synergism of bio-net membrane, demersal filter feeders and submerged plants

Guan Baohua; Liu Zhengwen; Zhang Yongdong; Chen Feizhou; Yu Jinlei; Di Xiaodan


Archive | 2017

Spirogyra and attached algae control method based on maintaining of water quality

Yu Jinlei; Liu Zhengwen; Guan Baohua; Chen Feizhou


Archive | 2017

Method for promoting submerged plant growth with fish and benthonic animals cooperatively

Yu Jinlei; Liu Zhengwen; Guan Baohua; Chen Feizhou


Archive | 2015

Method for purifying water body by planting submerged plants with different root-shoot ratios together

Chen Feizhou; Di Xiaodan; Li Ke; Guan Baohua; Yu Jinlei

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Chen Feizhou

Chinese Academy of Sciences

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Liu Zhengwen

Chinese Academy of Sciences

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Di Xiaodan

Chinese Academy of Sciences

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Zhang Yongdong

Chinese Academy of Sciences

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Su Yaling

Chinese Academy of Sciences

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Chen Xiangchao

Chinese Academy of Sciences

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Jin Miao

Chinese Academy of Sciences

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Li Kuanyi

Chinese Academy of Sciences

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