scholarly journals The evolution of the trophic state of the Palic Lake (Serbia)

2010 ◽  
Vol 75 (5) ◽  
pp. 717-732 ◽  
Author(s):  
Ivan Grzetic ◽  
Natasa Camprag
Keyword(s):  
Trophic State ◽  
Algal Growth ◽  
Limiting Factor ◽  
Trophic State Index ◽  
Secchi Disk ◽  
Secchi Disk Transparency ◽  
Total Phosphorous ◽  
Pannonian Plain ◽  
State Index

The Palic Lake is a shallow lake typical for the Pannonian Plain. Due inadequate water quality, it was dried out in 1971 and re-established in 1977 and since than its trophicity has been worsening. Investigation of the long-term changes in the trophic state of this lake were tracked over the total phosphorous (TP), total nitrogen (TN), chlorophyll-a and Secchi disk transparency (SD transparency), expressed as the Carlson Trophic State Index (TSI). Regarding the TSI values, the water of the Palic Lake has been constantly evolving from eutrophic to hypereutrophic. TN/TP values < 10 indicate that nitrogen is the limiting factor for algal growth.

scholarly journals Effects of Environmental Factors on Nutrients Release at Sediment-Water Interface and Assessment of Trophic Status for a Typical Shallow Lake, Northwest China

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
Dekun Hou ◽  
Jiang He ◽  
Changwei Lü ◽  
Ying Sun ◽  
Fujin Zhang ◽  
...  
Keyword(s):  
Trophic State ◽  
Algal Growth ◽  
Northwest China ◽  
Trophic State Index ◽  
Nitrogen And Phosphorus ◽  
Daihai Lake ◽  
Terrestrial Source ◽  
Limiting Nutrient ◽  
State Index

Surface sediment and water samples were collected from Daihai Lake to study the biogeochemical characteristics of nitrogen and phosphorus, to estimate the loads of these nutrients, and to assess their effects on water quality. The contents and spatial distributions of total phosphorus (TP), total nitrogen (TN), and different nitrogen forms in sediments were analyzed. The results showed that concentrations of TN and TP in surface sediments ranged from 0.27 to 1.78 g/kg and from 558.31 to 891.29 mg/kg, respectively. Ratios of C : N ranged between 8.2 and 12.1, which indicated that nitrogen accumulated came mainly from terrestrial source. Ratios of N : P in all sampling sites were below 10, which indicated that N was the limiting nutrient for algal growth in this lake. Effects of environment factors on the release of nitrogen and phosphorus in lake sediments were also determined; high pH values could encourage the release of nitrogen and phosphorus. Modified Carlson’s trophic state index (TSIM) and comprehensive trophic state index (TSIC) were applied to ascertain the trophic classification of the studied lake, and the values ofTSIMandTSICranged from 53.72 to 70.61 and from 47.73 to 53.67, respectively, which indicated that the Daihai Lake was in the stage of hypereutropher.

scholarly journals Trophic Status and Phytoplankton Limitation Conditions in a Few Bulgarian and Hungarian Danube River Wetlands

2016 ◽  
Vol 18 (2) ◽  
pp. 19-28
Author(s):  
Roumen Kalchev ◽  
Árpád Berczik ◽  
Michaela Beshkova ◽  
Mária Dinka ◽  
Hristina Kalcheva ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Trophic State ◽  
Trophic Status ◽  
Danube River ◽  
Trophic State Index ◽  
Secchi Disk ◽  
State Index

Abstract The phytoplankton limitation conditions in a few Bulgarian and Hungarian wetlands and in two more sampling sites, one for each Danube stretch, were investigated by means of trophic state index of Carlson (1977) for phytoplankton chlorophyll-a (CHL), Secchi disk depths (SD), total phosphorus (TP), and total nitrogen (TN) concentrations. Phytoplankton of both river sites was not limited by non-algal turbidity, nor was they phosphorus and nitrogen limited. In summer months the studied wetlands were predominantly nitrogen limited, while in spring and autumn limitation by non-algal turbidity prevailed.

scholarly journals MONITORAMENTO DA AQUICULTURA EM RESERVATÓRIOS CONTINENTAIS POR MEIO DO ÍNDICE DE ESTADO TRÓFICO

Nativa ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 262
Author(s):  
Clauber Rosanova ◽  
Emílio Sousa Pinho ◽  
Flávia Tavares Matos ◽  
Alberto Akama ◽  
Guilherme Wolff Bueno ◽  
...  
Keyword(s):  
Trophic State ◽  
Anthropogenic Activities ◽  
Quality Parameters ◽  
Trophic State Index ◽  
Time Data ◽  
Oxygen Conductivity ◽  
State Index ◽  
And Control ◽  
Status Index

A aquicultura é a atividade que mais cresce dentre os setores de produção de alimentos, porém, sua prática pode causar impactos ambientais no ambiente aquático, caso não haja um plano de monitoramento eficiente. O objetivo do presente trabalho foi avaliar o grau de trofia do ambiente utilizando o Índice de Estado Trófico (IET) em uma atividade aquícola de sistema de produção em tanques-rede no reservatório do Lajeado, Palmas, Tocantins na estação seca do ano. O monitoramento foi realizado no período de maio/2017 a agosto/2017 e envolveu a coleta de amostras para análises dos seguintes parâmetros de qualidade de água: fósforo total e clorofila-a. Paralelamente, houve a realização de coleta de dados de temperatura, turbidez, oxigênio dissolvido, condutividade, pH e sólidos totais dissolvidos. Os resultados do cálculo do Índice de Estado Trófico (IET) mostraram que a área em estudo durante os meses de maio e agosto apresentou-se predominantemente em graus eutrófico e hipereutrófico. O ponto controle também apresentou alto grau de trofia, indicando que o estado trófico do lago nas proximidades da área aquícola sofre forte influência de atividades antrópicas externas. Assim, os efeitos desta atividade a médio e longo prazo são difíceis de serem previstos, havendo a necessidade constante do monitoramento e controle da qualidade da água.Palavras-chave: aquicultura, eutrofização, impacto ambiental, poluição, tanque rede. MONITORING OF AQUACULTURE IN CONTINENTAL RESERVOIRS USING THE TROPHIC STATUS INDEX ABSTRACT:Aquaculture is the fastest growing activity among food production sectors, however, its practice can cause environmental impacts, in case if a monitoring plan is not applied. The objective of the present study was to evaluate the trophic environment status using the Trophic State Index (TSI) in an aquaculture activity in a netcage system in the Lajeado reservoir, Palmas, Tocantins during the dry season. The monitoring was carried out from May / 2017 to August / 2017 and involved the water sampling for analysis of the following water quality parameters: total phosphorus and chlorophyll-a. At the same time, data were collected on temperature, turbidity, dissolved oxygen, conductivity, pH and total dissolved solids. The Trophic State Index (TSI) results showed that the area under study during the months of May and August was predominantly under a supereutrophic condition. It indicates that the lake trophic state in the aquaculture surrounding area is strongly influenced by external anthropogenic activities. Thus, the effects of this activity in the medium and long term are difficult to predict, so it´s necessary to monitor and control the water quality.Keywords: aquaculture, eutrophication, environmental impact, pollution, net cage.

scholarly journals Long-term Shifts in Dominant Phytoplankton Species and Trophic State Index in Summer in Lake Suwa

2018 ◽  
Vol 41 (3) ◽  
pp. 43-54 ◽  
Author(s):  
Noriko FUTATSUGI ◽  
Yuichi MIYABARA ◽  
Yasunori SAITO ◽  
Takayuki HANAZATO ◽  
Ho-Dong PARK
Keyword(s):  
Trophic State ◽  
Trophic State Index ◽  
Phytoplankton Species ◽  
Lake Suwa ◽  
State Index

scholarly journals Assessment of Water Quality and Trophic Status of Duhok Lake Dam

2017 ◽  
Vol 14 (2) ◽  
pp. 335-342 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Water Quality ◽  
Trophic State ◽  
Trophic Status ◽  
Algal Growth ◽  
Limiting Factor ◽  
Water Type ◽  
Secchi Disk Transparency ◽  
High Sulfate ◽  
Status Level ◽  
Hard Type

This study is conducted in order to, investigate the trophic state of Duhok Lake Dam located within Duhok city, Iraq. Water samples are collected seasonally from three monitored sites during 2011. The parameters used for assessing water quality and trophic status level include: water temperature, pH, EC, TDS, DO, BOD5, nutrients, Secchi disk transparency, and chlorophyll a. The results reveal that DO is above 5 mg.l-1 in all sites, BOD5 value is within permissible level for domestic uses. Water quality considered as a hard type. High sulfate concentration is recorded during the study period. Trophic state shows that water type is classified as mesotrophic during autumn season, while it is regarded as eutrophic in other seasons. TDN/TDP ratio suggests that phosphorus is a limiting factor for algal growth. Based on IWQI, the water type is classified as excellent type for irrigation purpose.

Long-term variations of the trophic state index in the Narochanskie Lakes and its relation with the major hydroecological parameters

2016 ◽  
Vol 43 (5) ◽  
pp. 809-817 ◽  
Author(s):  
B. V. Adamovich ◽  
T. V. Zhukova ◽  
T. M. Mikheeva ◽  
R. Z. Kovalevskaya ◽  
E. V. Luk’yanova
Keyword(s):  
Trophic State ◽  
Trophic State Index ◽  
State Index ◽  
Long Term Variations

Trophic Status of Lake Phewa and Kulekhani Reservoir, Nepal

2021 ◽  
Vol 18 (3) ◽  
pp. 49-57
Author(s):  
Smriti Gurung ◽  
Babi Kumar Kafle ◽  
Bed Mani Dahal ◽  
Milina Sthapit ◽  
Nani Raut ◽  
...  
Keyword(s):  
Trophic State ◽  
Trophic Status ◽  
Secchi Depth ◽  
Sustainable Use ◽  
Water Bodies ◽  
Limiting Factor ◽  
Trophic State Index ◽  
Post Monsoon ◽  
State Index ◽  
Lake Phewa

Eutrophication is one of the growing environmental concerns and is affecting and compromising freshwater bodies across the world making the trophic status assessment of water bodies crucial for their restoration and sustainable use. This paper describes the trophic status of Lake Phewa and Kulekhani Reservoir from Nepal. Sampling was conducted during October 2017 (post-monsoon), April 2018 (Pre-monsoon), July 2018 (Monsoon) and February 2019 (Winter). Trophic State Index (TSI) as given by Carlson (1977) and Trophic State Index Deviation given by Carlson (1991) were estimated to assess trophic status and deviations between the Trophic State Indices. One-way analysis of variance showed significant seasonal variation (p < 0.05) in Secchi depth, total phosphorus (TP), TSI in both the water bodies. Both the water bodies were classified as eutrophic during pre-monsoon and post-monsoon, and hypereutrophic during the monsoon indicating the increased flow of allochthonous inputs from their respective catchments. Non-algal turbidity was found to be the limiting factor for productivity. There is a need for sustainable watershed management in order to reduce the nutrients runoff and accumulation in the water bodies.

scholarly journals Trophic Responses of the Asian Reservoir to Long-Term Seasonal and Interannual Dynamic Monsoon

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 2066 ◽  
Author(s):  
Md Mamun ◽  
Ji Yoon Kim ◽  
Kwang-Guk An
Keyword(s):  
Trophic State ◽  
Suspended Solids ◽  
Light Attenuation ◽  
Algal Growth ◽  
Water Clarity ◽  
Algal Community ◽  
Trophic State Index ◽  
Chl A ◽  
Blue Green Algae

The main objectives of the study were to determine the trophic response of the temperate reservoir to seasonal and interannual variabilities of monsoon inorganic solids and nutrients along the gradients of the morphologically complex Asian reservoir using long-term datasets between 2000–2018. Nutrient regime (total nitrogen—TN, total phosphorus—TP), total suspended solids (TSS), and chlorophyll-a (CHL-a) were primarily affected by an intensity of summer monsoon and the longitudinal structure of riverine (Rz), transitional (Tz), and lacustrine (Lz) zone. The reservoir is a nitrogen-rich system and the phosphorus content of the water was relatively low, and it had low mean N:P ratios (<40), implying a P-limiting system. The Lz was a highly P-limited zone in comparison to Rz and Tz zone during both drought (2015) and flood year (2011). The TP content was higher in the mainstem (S3) than the embankment (S4 and S6) of the reservoir due to the monsoon river inputs of the nutrients. Nonparametric Mann–Kendall tests indicated that TP decreased over the long-term years in the Rz, while it did not show any trend in Tz, Lz, IT1, and IT2. TN showed an increasing trend in Rz, Tz, Lz, and IT2 except for IT1. The empirical regression model for chlorophyll nutrients showed that CHL-a had a strong positive relationship with TP (R2 = 0.67, p < 0.01) than TN (R2 = 0.06, p < 0.01), supporting the view that algal growth in lentic systems responds to TP enrichment and TP may provide a reliable basis for predicting algal biomass. The seasonality of CHL-a and TP showed a monomodal pattern and indicates that summer TP influences summer algal growth in Tz, Lz, and IT2. The water clarity (SD) of the reservoir was significantly (p < 0.01) influenced by TP (R2 = 0.62), TSS (R2 = 0.67), and CHL-a (R2 = 0.68) rather than TN (R2 = 0.10). The non-algal light attenuation coefficient (Kna) was determined mainly by suspended solids and the monsoon hydrology. The trophic state was much higher when assessments were based on TSI (CHL-a) than on TSI (TP) and TSI (SD). TSI (CHL-a) indicated the eutrophic state of the reservoirs except for the zone of Lz during the premonsoon season. Analysis of trophic state index deviation (TSID) suggested that the blue-green algae dominated the algal community, and the effects of non-algal turbidity and zooplankton grazing were minor in the reservoir.

scholarly journals MULTITEMPORAL ANALYSIS FOR TROPHIC STATE MAPPING IN BATUR LAKE AT BALI PROVINCE BASED ON HIGH-RESOLUTION PLANETSCOPE IMAGERY

2021 ◽  
Vol 17 (2) ◽  
pp. 149
Author(s):  
Rahma Nafila Fitri Sabrina ◽  
Sudaryatno Sudaryatno
Keyword(s):  
Spatial Data ◽  
Trophic State ◽  
Good Condition ◽  
Remote Sensing Data ◽  
State Parameter ◽  
Physical Factors ◽  
Trophic State Index ◽  
Secchi Disk Transparency ◽  
Data Processing Tool ◽  
State Index

Remote sensing data for analyzing and evaluating trophic state ecosystem problems seen in Batur Lake isan approach that is suitable for water parameters that cannot be observed terrestrially. As the multitemporal spatial data used in this study were extensive, it was necessary to consider the effectiveness and efficiency of the processing and analysis, therefore R Studio was used as a data processing tool. Theresearch aims to(1) map the trophic state of Batur Lake multitemporally usingPlanetScope Imagery;(2) assess the accuracy of the trophic state model and applyitto anothertemporal data as a SpatialBigData;and (3) understand the trophic state impacton the water quality of Batur Lake based on physical factors andthelake’s chemical concentration (sulfur concentration). Theresearch showsthatthetrophic state of Batur Lake isin good condition,with an ultraoligotrophic state as the majority class,based on the mean Trophic State Index (TSI) value of9.49. The standard errorsof each trophic state parameter were0.010 for total phosphor, 0.609 for chlorophyll-a, and 0.225 for Secchi Disk Transparency (SDT). The multitemporal model demonstratesthat the correlation between the increase oftrophic state and mass fish death cases in Batur Lake is existent.

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