scholarly journals Community structure of macrozoobenthos and the evaluation of water environment in Lake Taihu

2015 ◽  
Vol 27 (5) ◽  
pp. 840-852 ◽  
Author(s):  
XU Hao ◽  
◽  
CAI Yongjiu ◽  
TANG Xiangming ◽  
SHAO Keqiang ◽  
...  
Keyword(s):  
Community Structure ◽  
Lake Taihu ◽  
Water Environment

scholarly journals Spatial autocorrelation of phytoplankton biomass is weak in the rivers of Lake Taihu Basin, China

2019 ◽  
pp. 35
Author(s):  
Zhaoshi Wu ◽  
Ming Kong ◽  
Yamin Fan ◽  
Xiaolong Wang ◽  
Kuanyi Li
Keyword(s):  
Community Structure ◽  
Spatial Autocorrelation ◽  
Phytoplankton Biomass ◽  
Phytoplankton Community ◽  
Lake Taihu ◽  
Total Biomass ◽  
Phytoplankton Community Structure ◽  
River Systems ◽  
Toxic Cyanobacteria ◽  
The Mean

We investigated the characteristic of phytoplankton community structure across the entire Lake Taihu Basin (LTB), one of the most developed areas in China. A morphologically based functional group (MBFG) proposed by Kruk et al. (2010), especially potential toxic cyanobacteria (group III and VII), was also illustrated. Samples were collected at 96 sites along main rivers throughout the four seasons from September 2014 to January 2016. Significant differences in the phytoplankton community structure were observed at spatial (particularly between Huangpu/Tiaoxi and the other 4 river systems) and seasonal scales. On a spatial basis, high variability was observed in the mean phytoplankton biomass, with a relatively high value of 3.13 mg L−1 in Yanjiang system and a relatively low value in Huangpu (1.23 mg L−1) and Tiaoxi (1.44 mg L−1) systems. The mean biomass of potential toxic cyanobacteria accounted for 18.28% of the mean total biomass spatially, which was more abundant in Nanhe and Yanjiang systems. Spatial autocorrelation was weak for the total biomass and its four main components (bacillariophyta, chlorophyta, euglenophyta, and cyanobacteria) at whole basin scale regardless of season. Regarding the river system, significant autocorrelation was scarcely observed in all the river systems except Huangpu, especially in the inflows. The characteristic in terms of hydrological and environmental conditions may determine the community structure of the 6 river systems. Our study highlighted the importance of monitoring based on a large spatial scale, and more attention should be paid to potential toxic cyanobacteria for water quality management purposes.

Investigation on Nutrient Loads of Lake Taihu in China

2014 ◽  
Vol 989-994 ◽  
pp. 1286-1291 ◽  
Author(s):  
Hua Wang ◽  
Kun Xia ◽  
Bao Li ◽  
Yi Yi Zhou
Keyword(s):  
River Runoff ◽  
Laboratory Experiments ◽  
Lake Taihu ◽  
Water Environment ◽  
Temporal Distribution ◽  
Bulk Deposition ◽  
Nutrient Loads ◽  
Environment Protection ◽  
Eutrophication Control ◽  
Internal Release

Based on measured data and laboratory experiments, the spatial and temporal distribution of nutrient loads of Lake Taihu from the sources of river runoff, atmospheric bulk deposition and internal release was quantitatively analyzed. Results showed that: (1) In 2011, annual river inputs of total phosphorus (TP) and total nitrogen (TN) respectively were 2382.4 tons and 50245.0 tons, and annual river outputs of TP and TN respectively were 849.1 tons and 24236.7 tons, Huxi area was the major transverse source of nutrients as a large proportion of TP(71.6%) and TN(66.2%). (2) Annual nutrient loads of Lake Taihu were 3306.6 tons TP and 48007.0 tons TN, of which the contribution of river runoff, atmospheric bulk deposition and internal release to TP accounted for 46.3%, 38.3% and 15.4%, and that to TN accounted for 54.2%, 43.7% and 2.1%, respectively. (3) Inputs of nutrients to Lake Taihu were higher in summer (June to August), of which 983.9 tons TP and 8874.9 tons TN in June, 1420.9 tons TP and 7463.3 tons TN in July, 1347.1 tons TP and 7181.3 tons TN in August. The results have great significance for eutrophication control and water environment protection in Lake Taihu.

Water Pollutant Control for a River-Lake Region to the Northwest of Lake Taihu

2014 ◽  
Vol 665 ◽  
pp. 420-425
Author(s):  
Hua Wang ◽  
Feng Qiang Ji ◽  
Yi Yi Zhou ◽  
Kun Xia
Keyword(s):  
Water Quality ◽  
Lake Taihu ◽  
Water Environment ◽  
Reduction Rate ◽  
Control Unit ◽  
Research Area ◽  
River Network ◽  
Lake Region ◽  
Total Amount Control ◽  
Frequent Exchange

In this paper, Zhushan Bay watershed to the northwest of Lake Taihu was selected as the research area. Taking the developed river-lake connectivity and frequent exchange of pollutants into consideration, we put forward a calculation method of water environment carrying capacity (WECC) for river network based on multiple objectives of water quality reaching standard in river environment function zones and control sections, concentration profile constraint of sewage outlet. According to the proposed method, we calculated the watershed WECC, assigned to each control unit, and quantitatively analyzed the reductions and reduction rate of pollutants under the condition of total amount of each pollutant of control unit reach water quality standards. The results showed that: The pollution loads of each pollutant in Zhushan Bay watershed were greater than WECC. The reduction of COD, NH3-N, TN and TP is 834.4 tons, 226.1 tons, 724.8 tons and 108.9 tons, and the reduction rate of COD, NH3-N, TN and TP is 13.8%, 36.5%, 55.2% and 73.4%, respectively. This paper plays a guiding role in the research of total amount control of river network in Zhushan Bay watershed, and provides important references for total amount control of similar river-lake region.

The Study on Protozoan Community Structure of Zhalong Wetland

2014 ◽  
Vol 535 ◽  
pp. 470-473
Author(s):  
Yao Zhou ◽  
Zhi Gang Xie
Keyword(s):  
Water Quality ◽  
Community Structure ◽  
Native Species ◽  
Water Environment ◽  
Species Number ◽  
Zhalong Wetland ◽  
Quality Of Water ◽  
Protozoan Community ◽  
Significant Difference ◽  
Mining Water

The zhalong wetland water environment is an important part of the ecological environment, The protozoan community structure of Zhalong wetland was researched in this article. We can monitoring water pollution degree through the analysis of protozoan population, this research investigated protozoa population structure in qiqihar zhalong wetland through the PFU method and direct mining water in water samples, and analyse the physiological and biochemical parameters to assess the quality of water quality changes during May-October in 2012, the result show that 74 protozoa were observed including ciliate fleshiness shrimp center, flagellate less. In comparison with clean water inside, can use light and feed on algae native species number is more, different water quality in different conditions, protozoa composition has a very significant difference.

Community structure of planktonic ciliates and its relationship to environmental variables in Lake Taihu

2014 ◽  
Vol 34 (16) ◽  
Author(s):  
李静 LI Jing ◽  
戴曦 DAI Xi ◽  
孙颖 SUN Ying ◽  
舒婷婷 SHU Tingting ◽  
刘正文 LIU Zhengwen ◽  
...  
Keyword(s):  
Community Structure ◽  
Environmental Variables ◽  
Lake Taihu ◽  
Planktonic Ciliates
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