Global warming has aggravated the problem of lake eutrophication. As a typical large, eutrophic, shallow lake in China, the issue of cyanobacterial harmful algal blooms (cyanoHABs) was particularly prominent in Lake Taihu. We took Lake Taihu as the study area, using the meteorological (temperature, wind speed, rainfall, and sunshine hours), water quality (total nitrogen, total phosphorus, conductivity, pH, and chemical oxygen demand), and biological (chlorophyll-a in phytoplankton) monitoring data from 1992 to 2020.
View Article and Find Full Text PDFOrganic aggregates (OA) are the important circulation hub of matter and energy in aquatic ecosystems. However, the comparison studies on OA in lakes with different nutrient levels are limited. In this study, spatio-temporal abundances of OA and OA-attached bacteria (OAB) in oligotrophic Lake Fuxian, mesotrophic Lake Tianmu, middle-eutrophic Lake Taihu, and hyper-eutrophic Lake Xingyun were investigated in different seasons during 2019-2021 using a scanning electron microscope, epi-fluorescence microscope, and flow cytometry.
View Article and Find Full Text PDFIn order to improve water quality, many urban lakes in China have undergone environmental restoration since the introduction of China's tenth five-year plan. To understand the effectiveness of improvement projects on eutrophic urban lakes, we analyze the changes in water quality of Lihu Lake over the past 30 years, i.e.
View Article and Find Full Text PDFThe physical and chemical characteristics were continually monitored during a wind course one time per day, which continued for 10 days, and other water physical and chemical parameters were concomitantly monitored. Organic aggregates (OA) abundance was significantly higher during wind period than calm stage and the maximum of OA abundance, which occurred the same day when wind speed was highest, was 29 times higher than that in the calm stage. Although OA-C, OA-N and OA-P concentration were decreased during wind period, the total C, N and P contend in OA were increased for the increased OA abundance.
View Article and Find Full Text PDFThe abundance, organic matter content and chemical composition of organic aggregation (OA) were monitored in Lake Taihu in different ecotype sites from January to December in 2007, and other water physical and chemical parameters were concomitantly monitored. The OA abundance was increasing along regional and P-enrichment gradients, and there were significant differences in OA characteristic in different ecotypes. Moreover, wind is one important factor that contributes to OA characteristic in Lake Taihu.
View Article and Find Full Text PDFA comparative study on seasonal variations of rotifer in different lake areas, including the riverine zone, Meiliang Bay, the central open water area and Gonghu Bay in Lake Taihu, was conducted from Jul. 2006 to Jun. 2007.
View Article and Find Full Text PDFAn active form of a single-chain antibody fragment (scFv) from the murine monoclonal antibody ABL-1, which is specific for B-cell-activating factor of the TNF family, was produced in Escherichia coli. The complementary DNAs encoding the variable regions of the heavy chain (VH) and light chain (VL) were connected by a (Gly4Ser)3 linker, using an assembly polymerase chain reaction. The construct VH-linker-VL was placed under the control of highly efficient T7 promoter system.
View Article and Find Full Text PDF