scholarly journals Assessment of the trophic state of a water body

1983 ◽  
Vol 19 (3) ◽  
pp. 229-234 ◽  
Author(s):  
O. Ravera
Keyword(s):  
Water Body ◽  
Trophic State

Characteristics of Phytoplankton Community Structure and Evaluation of Trophic State of Water Body in Bosten Lake

2013 ◽  
Vol 864-867 ◽  
pp. 422-427 ◽  
Author(s):  
Xing Mu ◽  
Fang Wang ◽  
He Ying Sun ◽  
Li Min Chu ◽  
Jia Li Wang
Keyword(s):  
Community Structure ◽  
Water Body ◽  
Trophic State ◽  
Diversity Index ◽  
Bosten Lake ◽  
Wiener Diversity Index ◽  
State Of Water ◽  
Synedra Acus ◽  
The Mean ◽  
Richness Index

Bosten Lake was the largest inland freshwater lake in China. It is facing with a series of ecological problems nowadays. The phytoplankton and water samples of seventeen sampling sites in Bosten Lake were collected in September 2012. Results show that sixty-four species (genera) of phytoplankton, which belong to six phyla, are identified. The community structure of phytoplankton is dominated by Chlorophyta. The mean cell density of phytoplankton in whole lake is 8179.01×104cells·L-1 and Cyanophyta accounts for 94.71%. The dominant species are Chroococcus sp. and Synedra acus. In terms of Shannon-Wiener diversity index, Margalef richness index, Pielou evenness index and total nitrogen content, it is ascertained that trophic state of water body in Estuary and Pumping Station is between mesotrophication and eutrophication. While in the other districts, the water body is eutrophic. In addition, the eutrophic degree of water body in District IV is higher.

Differentiated macrophyte types as a habitat for rotifers in small mid-forest water bodies

Biologia ◽  
2009 ◽  
Vol 64 (6) ◽  
Author(s):  
Anna Basińska ◽  
Natalia Kuczyńska-Kippen
Keyword(s):  
Water Body ◽  
Catchment Area ◽  
Trophic State ◽  
Positive Relationship ◽  
Open Water ◽  
Physical Chemical ◽  
Rotifer Community ◽  
Chemical Factors ◽  
Rotifer Communities ◽  
Eutrophic Species

AbstractThe rotifer community structure may be shaped by a variety of environmental factors, including biological parameters, such as predation or competition, as well as by physical-chemical factors, among which the kind of macrophyte substratum and parameters relating to the trophic state and to the catchment area conditions are of great importance. Another impact on rotifer composition, abundance and frequency may be expected when considering differentiated macrophyte types (including helophytes, nymphaeids and elodeids) within a group of eight ponds located within a mid-forest catchment area, which was the main aim of the present study. Detailed analysis on the participation of indicator eutrophic rotifer species provided an additional goal of this investigation in order to qualify the trophic state of this kind of water body located within the Wielkopolska region, in the central western part of Poland.The presence of 117 taxa, including 7 species that are rare or infrequently distributed in the Polish fauna was recorded. The number of taxa and rotifer abundance differed greatly in respect to the specific water body and to the type of substratum. The vegetated zones dominated by elodeids were characterised by the most various and most abundant rotifer communities as well as by the highest values of the Shannon-Weaver index. This reflects a positive relationship between the heterogeneity of habitat and the structure of rotifer communities. It was also found that helophytes and the open water zone possessed the highest, while elodeids the lowest percentage of eutrophic species.

scholarly journals Effects of Sewage Discharge on Trophic State and Water Quality in a Coastal Ecosystem of the Gulf of California

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Héctor Hugo Vargas-González ◽  
José Alfredo Arreola-Lizárraga ◽  
Renato Arturo Mendoza-Salgado ◽  
Lía Celina Méndez-Rodríguez ◽  
Carlos Hernando Lechuga-Deveze ◽  
...  
Keyword(s):  
Water Quality ◽  
Coastal Water ◽  
Environmental Quality ◽  
Water Body ◽  
Gulf Of California ◽  
Trophic State ◽  
Coastal Ecosystem ◽  
Urban Wastewater ◽  
Receiving Water

This paper provides evidence of the effects of urban wastewater discharges on the trophic state and environmental quality of a coastal water body in a semiarid subtropical region in the Gulf of California. The concentrations of dissolved inorganic nutrients and organic matter from urban wastewater primary treatment were estimated. La Salada Cove was the receiving water body and parameters measured during an annual cycle were temperature, salinity, dissolved oxygen, nitrite, nitrate, ammonia, orthophosphate, and chlorophylla. The effects of sewage inputs were determined by using Trophic State Index (TRIX) and the Arid Zone Coastal Water Quality Index (AZCI). It was observed that urban wastewater of the city of Guaymas provided 1,237 ton Nyr−1and 811 ton Pyr−1and TRIX indicated that the receiving water body showed symptoms of eutrophication from an oligotrophic state to a mesotrophic state; AZCI also indicated that the environmental quality of the water body was poor. The effects of urban wastewater supply with insufficient treatment resulted in symptoms of eutrophication and loss of ecological functions and services of the coastal ecosystem in La Salada Cove.

scholarly journals Trophic State of a Shallow Lake with Reduced Inflow of Surface Water

2014 ◽  
Vol 40 (3) ◽  
pp. 3-11 ◽  
Author(s):  
Wojciech Ejankowski ◽  
Tomasz Lenard
Keyword(s):  
Surface Water ◽  
Water Body ◽  
Trophic State ◽  
Agricultural Landscape ◽  
Water Transparency ◽  
Lake Area ◽  
Eutrophic Lakes ◽  
Catchment Basin ◽  
The Earth ◽  
Reference Lake

Abstract According to the general classification of shallow eutrophic lakes, two alternative types are distinguished: phytoplankton-dominated and macrophyte-dominated lakes. The latter type is rare and currently endangered by human activity. In order to determine the effect of reduced inflow of surface water by an earth dyke on the lake trophic state, certain biological and physico-chemical parameters were evaluated. This work focuses on two lakes of similar morphometric characteristics situated in the agricultural landscape. The effect of the earth dyke on the trophic state was positively verified. The lake situated in the catchment basin, in which the inflow of surface water was reduced, was defined as meso-eutrophic, with a small amount of phytoplankton and high water transparency. The reference lake was highly eutrophic, with low water transparency and a large amount of phytoplankton. The water body surrounded by the earth dyke was macrophytes dominated (65% of the lake area), whereas the reference lake was a phytoplankton-macrophyte type (42% of the lake area). The trophic evaluation of a lake can be underestimated because of a significant amount of biogenic compounds accumulated in plant tissues. Thus, the values of Carlson’s indices in macrophyte-dominated lakes may not account for the total amount of nutrients in the water body.

scholarly journals Study of Changes of Trophic Status of the Kuchurganske Reservoir in 2006-2018

2018 ◽  
Keyword(s):  
Chlorophyll A ◽  
Negative Correlation ◽  
Water Body ◽  
Trophic State ◽  
Trophic Status ◽  
Functional Dependence ◽  
Physicochemical Characteristics ◽  
Water Volume ◽  
Content Increase ◽  
Trophic Index

Purpose. Assessment of the trophic status of water in the Kuchurganske Reservoir in 2006-2018. Methods. Determination of hydrological, hydrochemical and hydrobiological characteristics of the water body's environment has been done using standard methodologies. Four indicators of water eutrophication have been used: chlorophyll a concentration, bacterioplankton number, trophic indices TSI and TRIX. Results. Features of physicochemical characteristics of water in the water-body have been analysed. Higher water temperature has been registered in the middle and lower parts of the water-body compared with its upper reaches. Mineral content increase in water has been found in the direction from lower to upper part; the critical for hydrobionts life decrease of oxygen concentration has been registered in the upper reaches the most often. Analysis of long-term changes in chlorophyll a and bacterioplankton has been carried out. Statistical interconnections have been established between trophic state indicators and physicochemical characteristics of the reservoir. A close positive correlation has been registered between chlorophyll а content and bacterioplankton number, which is caused by the functional dependence of bacteria on the organic matter produced by phytoplankton. It has been shown that with an increase of water volume in the reservoir the value of these indicators of trophic status went down, which was proved by close negative correlation dependence between those values and the depth of water-body. It was demonstrated for the first time that water transparency revealed close significant negative correlation with all the indices and indicators of water trophic status, which evidenced the possibility to use the transparency as a simple indicator of water trophic state as established that the Kuchurganske Reservoir’s trophic status assessment on chlorophyll a, bacterioplankton and the TSI trophic index practically coincided and evidenced the increase in trophic status of the water-body from eutrophic to hypertrophic in last 2016-2018. The reservoir’s upper reaches were characterized by higher water trophicity compared with the central and lower parts. The values of TRIX trophic index developed for marine water assessment had practically always been showing higher trophic status compared to other indicators.

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