Understanding the patterns and mechanisms of urban water ecosystem degradation: phytoplankton community structure and water quality in the Qinhuai River, Nanjing City, China

On the basis of the “Environmental quality standard for surface water” (GB 3838-2002) in China, eight water quality indexes were measured in M River, including pH, water temperature (T), transparency (SD), dissolved oxygen (DO), chemical needs Oxygen (COD), ammonia nitrogen (NH3-N), total nitrogen (TN), total phosphorus (TP). Using the single factor index method, it is concluded that the water pollution of M River is serious and the water quality is beyond Grade V of water environment standard. Moreover some indexes of the water quality meet with the standard level, including COD, NH3-N, TN and TP. The Pearson correlation analysis is conducted between water quality indexes and phytoplankton community parameters. After phytoplankton qualitative and quantitative analysis, the phytoplankton community characteristics in Minxin River were analyzed by Dominance index (Y), Shannon-Wiener diversity index (H’), Margalef Species diversity index (d) and Pielou evenness index (J). H’ and TN was a significant positive correlation (r = 0.923, P <0.05); J and COD was a significant positive correlation (r = 0.918, P <0.05); There was a very significant negative correlation between d and water temperature (T), COD, NH3-N, TN (r =-0.881, P <0.01; r =-0.983, P <0.01; r =-0.893, P <0.01; r=-0.962, P<0.01). The result of the research indicates that T, COD, NH3-N and TN are main water quality indexes affecting phytoplankton community structure.

Download Full-text

A Water Quality Binning Method to Infer Phytoplankton Community Structure and Function

Estuaries and Coasts ◽

10.1007/s12237-020-00714-3 ◽

2020 ◽

Vol 43 (4) ◽

pp. 661-679

Author(s):

Claire Buchanan

Keyword(s):

Water Quality ◽

Community Structure ◽

Phytoplankton Community ◽

Structure And Function ◽

Phytoplankton Community Structure ◽

And Function

Download Full-text

Phytoplankton community structure in relation to environmental factors and ecological assessment of water quality in the upper reaches of the Genhe River in the Greater Hinggan Mountains

Environmental Science and Pollution Research ◽

10.1007/s11356-019-05200-3 ◽

2019 ◽

Vol 26 (17) ◽

pp. 17512-17519 ◽

Cited By ~ 4

Author(s):

Xiaoyu Li ◽

Hongxian Yu ◽

Huibo Wang ◽

Chengxue Ma

Keyword(s):

Water Quality ◽

Community Structure ◽

Environmental Factors ◽

Phytoplankton Community ◽

Ecological Assessment ◽

Phytoplankton Community Structure

Download Full-text

Assessment of phytoplankton community structure and water quality in the Hongmen Reservoir

Water Quality Research Journal ◽

10.2166/wqrj.2021.022 ◽

2021 ◽

Vol 56 (1) ◽

pp. 19-30

Author(s):

Chenwei Liu ◽

Xu Sun ◽

Lianghu Su ◽

Jinbang Cai ◽

Longjiang Zhang ◽

...

Keyword(s):

Water Quality ◽

Community Structure ◽

Phytoplankton Community ◽

Diversity Index ◽

Statistical Tests ◽

Temporal Distribution ◽

Wiener Index ◽

Pollution Level ◽

Phytoplankton Community Structure ◽

Wet Season

Abstract To find effective measures to control the water quality of the Hongmen Reservoir, it is necessary to better understand its phytoplankton composition, abundance and spatial and temporal distribution. Samples were collected at three sampling sites in January (dry season), May (wet season) and September (normal season) in 2019. Trophic level and stability status were assessed on the basis of the Shannon diversity index (H), species richness (S) and evenness (J) index. The different relationships between phytoplankton and the concentrations of several physicochemical parameters and the main soluble nutrients were evaluated by statistical tests. The results showed that there were 75 species belonging to seven groups of phytoplankton, including Chlorophyta (44 species), Bacillariophyta (12 species), Cyanophyta (9 species) and others (10 species). The phytoplankton community composition belongs to the Chlorophyta–Bacillariophyta–Cyanobacteria type structure; and Microcystis, Anabaena azotica Ley, Aphanizomenon, Melosira granulata were the main contributors to the dissimilarities in the temporal distributions of their communities. The phytoplankton density ranged from 4.42 × 106 to 8.99 × 106 particles/L, with an average of 6.45 × 106 particles/L, and the biomass was 4.42 × 106 ∼ 8.99 × 106 particles/L, with an average of 6.45 × 106 particles/L. The variation ranges of the Shannon–Wiener index (H′), Margalef index (D) and Pielou evenness index (J) were 2.05 ∼ 2.85, 4.12 ∼ 6.60 and 0.61–0.78, respectively. This research shows that the water in the Hongmen Reservoir is clean and that the pollution level is light. The correlation analysis shows that total phosphorus and dissolved oxygen are the main factors affecting phytoplankton community structure in the Hongmen Reservoir.

Download Full-text