scholarly journals Can zooplankton species be used as indicators of trophic status and ecological potential of reservoirs?

2021 ◽  
Author(s):  
Manuel E. Muñoz-Colmenares ◽  
Juan M. Soria ◽  
Eduardo Vicente
Keyword(s):  
Water Quality ◽  
Trophic Status ◽  
Ecological Status ◽  
Zooplankton Species ◽  
Keratella Cochlearis ◽  
Physical And Chemical Variables ◽  
Daphnia Cucullata ◽  
Good Ecological Status ◽  
Physical And Chemical ◽  
Ecological Potential

AbstractThe European Water Framework Directive implements the policies to achieve a good ecological status of all European waterbodies. To determine the ecological potential in freshwater environments, abiotic (morphology, physical and chemical variables) and biotics (algae, fishes, etc.) metrics are used. Despite their importance in trophic web, zooplankton was not included as one of the Biological Quality Elements (BQE) to determine the water quality. In the present research, we studied the zooplankton species that can be considered as indicators of trophic status and ecological potential for more than 60 water reservoirs. The data were obtained from more of 300 samples collected during 10 years from reservoirs at Ebro River watershed, which is the largest basin in Spain. According to their physicochemical and biological elements, the trophic status and ecological potential of these reservoirs were established. More than 150 zooplankton species were identified during the study. The results from this research indicate that species that are related with low water quality are: Acanthocyclops americanus, Ceriodaphnia spp., Daphnia cucullata, Daphnia párvula, Diaphanosoma brachyurum, Brachionus angularis, Keratella cochlearis and Phompolyx sulcata. An indicator of moderate quality was Bosmina longirostris, while Daphnia longispina, Ascomorpha ovalis and Ascomorpha saltans were considered as indicators of good water quality. The data obtained suggest that zooplankton species can be used as a valuable tool to determine the water quality status and should be considered, in a near future, as one more of the BQE within the WFD metrics.

scholarly journals Chemical pollution imposes limitations to the ecological status of European surface waters

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Leo Posthuma ◽  
Michiel C. Zijp ◽  
Dick De Zwart ◽  
Dik Van de Meent ◽  
Lidija Globevnik ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Waters ◽  
Water Quality Management ◽  
Ecological Status ◽  
Water Quality Assessment ◽  
Current Approach ◽  
Toxicity Tests ◽  
Chemical Pollution ◽  
Applied Ecology ◽  
Good Ecological Status

Abstract Aquatic ecosystems are affected by man-made pressures, often causing combined impacts. The analysis of the impacts of chemical pollution is however commonly separate from that of other pressures and their impacts. This evolved from differences in the data available for applied ecology vis-à-vis applied ecotoxicology, which are field gradients and laboratory toxicity tests, respectively. With this study, we demonstrate that the current approach of chemical impact assessment, consisting of comparing measured concentrations to protective environmental quality standards for individual chemicals, is not optimal. In reply, and preparing for a method that would enable the comprehensive assessment and management of water quality pressures, we evaluate various quantitative chemical pollution pressure metrics for mixtures of chemicals in a case study with 24 priority substances of Europe-wide concern. We demonstrate why current methods are sub-optimal for water quality management prioritization and that chemical pollution currently imposes limitations to the ecological status of European surface waters. We discuss why management efforts may currently fail to restore a good ecological status, given that to date only 0.2% of the compounds in trade are considered in European water quality assessment and management.

scholarly journals Variability in Environmental Conditions Strongly Impacts Ostracod Assemblages of Lowland Springs in a Heavily Anthropized Area

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3276
Author(s):  
Giampaolo Rossetti ◽  
Valentina Pieri ◽  
Rossano Bolpagni ◽  
Daniele Nizzoli ◽  
Pierluigi Viaroli
Keyword(s):  
Water Quality ◽  
Ecosystem Services ◽  
Species Turnover ◽  
Agricultural Practices ◽  
Alpha Diversity ◽  
Po River ◽  
Physical And Chemical Variables ◽  
River Plain ◽  
Physical And Chemical ◽  
Restoration Measures

The Po river plain (Northern Italy) hosts artificial, lowland springs locally known as fontanili, which provide important ecosystem services in an area dominated by intensive agricultural activities. Here we present a study carried out in 50 springs. Each spring was visited once from October 2015 to January 2016. The sampled sites were selected to include springs studied in 2001 and 2004, to evaluate changes in water quality and ostracod assemblages that possibly occurred over a period of 10–15 years, and explore the relationships between ostracod community composition and water physical and chemical variables. Our results showed a decrease in the chemical water quality especially, in springs south of the Po river, evidenced by high nitrate levels. Most of the studied springs showed a relevant decrease in dissolved reactive silica, probably related to recent transformations of either agricultural practices or crop typology. Ostracods were mostly represented by common and tolerant species, and communities were characterized by low alpha diversity and high species turnover. Water temperature and mineralization level were the most influential variables in structuring the ostracod communities. We stress the need to implement conservation and restoration measures for these threatened ecosystems, to regain their role as ecosystem services providers.

scholarly journals Does an increase in water color intensity affect the lake trophic status and phytoplankton metrics?

2018 ◽  
pp. 46
Author(s):  
Tomasz Lenard ◽  
Wojciech Ejankowski ◽  
Małgorzata Poniewozik
Keyword(s):  
Trophic Status ◽  
Ecological Status ◽  
Phosphorus Concentration ◽  
Trophic State Index ◽  
Color Intensity ◽  
Water Color ◽  
High Precipitation Events ◽  
High Precipitation ◽  
The One ◽  
Good Ecological Status

During the 11-year period covered by this study (2003–2013), high precipitation events increased the water level in the deep hardwater of Lake Rogóźno (Eastern Poland), causing its water to become browner. We investigated the effect of a change in water color on the physical, chemical, and biological parameters of the lake. The concentration of total phosphorus and nitrogen decreased, whereas the total phytoplankton biomass, coupled with a high biomass of flagellate species, increased, with the increase in water color intensity. Such changes had an effect on the determination of ecological status, based on selected phytoplankton metrics (i.e., Polish, German, and Estonian) as well as the trophic status of Lake Rogóźno. The decrease of phosphorus concentration associated with an increase in water color intensity improved the trophic status of the lake based on Carlson's Trophic State Index. The changes in the phytoplankton community caused the deterioration of the ecological status of the lake when using the Polish and German indices adopted for clear water lakes. The use of the Estonian index, which is adapted to colored lakes, suggested that, despite the increase in water color intensity, the good ecological status of the lake was maintained or even improved. Our findings suggest that, in the event of a transformation like the one that occurred in the lake studied here, the use of only one index, adapted by state environmental monitoring programs in individual European countries, may be insufficient for the appropriate assessment of the ecological status of European lakes.

scholarly journals Distribution and isolation of microalgae for lipid production in selected freshwater reservoirs of northern Thailand

2018 ◽  
Vol 19 (1) ◽  
pp. 343-350
Author(s):  
TIPPAWAN PRASERTSIN ◽  
YUWADEE PEERAPORNPISAL
Keyword(s):  
Water Quality ◽  
Lipid Content ◽  
Trophic Status ◽  
Lipid Production ◽  
Dry Weight ◽  
Botryococcus Braunii ◽  
Chemical Parameters ◽  
Northern Thailand ◽  
Surrounding Areas ◽  
Physical And Chemical

Prasertsin T, Peerapornpisal Y. 2018. Distribution and isolation of microalgae for lipid production in selected freshwater reservoirs of northern Thailand. Biodiversitas 19: 343-350. Nong Bau Reservoir and Chiang Saen Lake are considered important freshwater reservoirs of Chiang Rai Province located in northern Thailand. The surrounding areas of these water bodies are host to a range of human activities that influence water quality. Moreover, to date, there are have not been any studies on the water quality and the distribution of microalgae in these places. The physical and chemical parameters of the water quality and microalgae were carried out in Nong Bua Reservoir and Chiang Saen Lake during the months of May, July, and October of 2015. Microalgae were isolated in order to investigate the lipid-producing abilities. Samples collected from Nong Bua Reservoir have revealed the presence of seven divisions, 90 species of algae. Six divisions, 55 species of algae were found in Chiang Saen Lake. The trophic status of the water was evaluated from the main parameters (AARL-PC Score), and it was determined that Nong Bua Reservoir was of meso-eutrophic status and Chiang Saen Lake was of mesotrophic status. Microalgae were isolated from Nong Bua Reservoir and Chiang Saen Lake for the purposes of studying lipid content; 25 and 6 isolations were identified, respectively. The lipid content was highest in Botryococcus braunii (39.25 ± 0.32% dry weight) followed by Ankistrodesmus sp. (26.80 ± 0.44% dry weight) and Coelastrum microsporum (24.95 ± 0.55% dry weight). The lowest lipid content was found in Planktolyngbya sp. (7.25 ± 0.43% dry weight). The indigenous strains of microalgae of Nong Bau Reservoir and Chiang Saen Lake’s can be considered quite promising as model strains in terms of the production of biofuel within the country.

scholarly journals Mangrove oyster (Crassostrea rhizophorae) (Guilding, 1928) farming areas as artificial reefs for fish: A case study in the State of Ceará, Brazil

2006 ◽  
Vol 54 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Luiz Eduardo Lima de Freitas ◽  
Caroline Vieira Feitosa ◽  
Maria Elisabeth de Araújo
Keyword(s):  
Water Quality ◽  
Artificial Reefs ◽  
Visual Census ◽  
Ecological Aspects ◽  
Physical And Chemical Variables ◽  
Crassostrea Rhizophorae ◽  
Tidal Variations ◽  
Physical And Chemical ◽  
Permanent Residents

A type of platform, known as a table, is now being used for mangrove oyster farming. In Fortim, Ceará, Brazil, this activity was begun in June 2000 and covers an area of 50 m² overlying a sand-clay substrate. The present study has the following main objectives: to identify and catalogue the ichthyofauna colonizing the Crassostrea rhizophorae farming platforms; to evaluate ecological aspects, such as the possible correlation between the physical and chemical variables for water quality and the occurrence of the ichthyofauna; and to observe the differences in the fish species found during tidal variations. Specimens were identified and quantified using the linear-transect, visual census methodology. The ichthyofauna observed comprised 3,030 individuals belonging to 28 species and 20 families. Of the 28 species found in the area studied, 14 were marine transients, 12 marine dependent, and only 2 permanent residents. A significant association was observed between the abundance of 11 species and the physical and chemical variables studied. Based on these results, it may be concluded that the platforms act as artificial reefs for the ichthyofauna, being colonized by at least 28 species, and providing protection from predators as well as a source of food and a reproductive substrate.

scholarly journals Composition and richness of monogonont rotifers from La Plata River Basin, South America

2020 ◽  
Vol 20 (4) ◽  
Author(s):  
Bárbara A. Martins ◽  
Paula N. Coelho ◽  
Marcos G. Nogueira ◽  
Gilmar Perbiche-Neves
Keyword(s):  
South America ◽  
River Basin ◽  
Native Species ◽  
Open Water ◽  
Keratella Cochlearis ◽  
La Plata ◽  
Number Of Species ◽  
Kellicottia Bostoniensis ◽  
Physical And Chemical Variables ◽  
Physical And Chemical

Abstract: We present here the first study that analyzed the composition and richness of rotifers of the entire La Plata River basin, the second largest in South America, based on simultaneous and standardized sampling. Fifteen large reservoirs and eight river stretches were selected in the upper, middle, and lower portions of the Paraná, Paraguay, and Uruguay Rivers, which are the major rivers of the La Plata basin. We took a total of 86 samples (open water habitats) in 2010. A mean of 27±11 species per sub-basin was found, with the highest richness in the Lower Paraná (41 species), followed by the Paranapanema (40 species) and Lower Uruguay (38 species). Low richness was observed in the Middle Uruguay and Middle Paraná. We found 106 species belonging to 21 families and two orders. The family with the highest number of species was Lecanidae (21), followed by Brachionidae (20), Trichocercidae (9), and Synchaetidae (8). The species with higher occurrences were Conochilus dossuarius, Kellicottia bostoniensis, Keratella americana, Keratella cochlearis and Hexarthra mira. New occurrences of rotifers were registered for Brazil (Colurella adriatica), São Paulo State (Enteroplea lacustris), and Argentina (Gastropus hyptopus, Harringia rousseleti and Lecane thienemanni). Spearman correlation between the number of species and physical and chemical variables demonstrated positive correlation with chlorophyll and temperature, and negative correlation with dissolved oxygen. We extend the distribution list for some native (Lecane ludwigii) and non-native species of rotifers (K. bostoniensis). We also list the monogonont rotifer species found at the sampling stations.

scholarly journals COMMUNITY STRUCTURE AND DIVERSITY OF MACROZOOBENTHOS IN QUARRY RIBNICA’S CREEK AS INDICATOR OF SURFACE WATER MANAGEMENT

2018 ◽  
Vol 1 (2) ◽  
pp. 29
Author(s):  
Semir Dorić ◽  
Adnan Čučuković
Keyword(s):  
Water Quality ◽  
Diversity Index ◽  
Ecological Status ◽  
Diversity Indices ◽  
Running Waters ◽  
Surface Water Management ◽  
Specimen Collection ◽  
Good Ecological Status ◽  
Quality Assessments

Benthic macroinvertebrata (macrozoobenthos) are widely used for water quality assessments because they are considered as one of the best indicators of habitat quality in running waters, very conventionally called as „river health“. Benefits of research on macroinvertebrates include the quick assessment of biological resources for conservation purposes and the detection of water pollution. This research was performed in accordance with the EU Water Framework Directive (WFD). AQEM methodology was used for macrozoobenthos specimen collection from six sampling sites along quarry Ribnica’s main hydroecosystems – the Forest creek (quarry's water supply system) and the estuary of the river Ribnica (Mar-Sep, 2016). Laboratory analyses were carried out for the purpose of separation, counting and final taxonomic identification of organisms. Cluster analysis and diversity index computing were performed using BioDiversity Pro 2.0 software. Our findings suggest the existence of 15 taxa from classes Gastropoda, Hirudinea and Insecta with a total number of 454 sampled individuals. The Insecta class was the most numerous one with respect to the species found, including larvae of the orders Ephemeroptera, Plecoptera, Trichoptera and Diptera. Shannon-Weaver and Simpson diversity indices revealed highly developed communities of aquatic macroinvertebrates at all sampling sites. Water quality along quarry Ribnica based on macrozoobenthos indicator species of saprobity was found to be classified into moderate, low and non to very low polluted (Quality class I-II). Further long-term monitoring studies of macrozoobenthos are necessary in order to keep track of the good ecological status (GES) observed at quarry Ribnica’s aquatic ecosystems.

The use of the Biological Diatom Index (BDI) for the assessment of water quality in the Pilica River, Poland

2013 ◽  
Vol 42 (2) ◽  
Author(s):  
Bogusław Szulc ◽  
Katarzyna Szulc
Keyword(s):  
Water Quality ◽  
Chemical Analysis ◽  
Surface Waters ◽  
Ecological Status ◽  
Central Section ◽  
Diatom Index ◽  
Quality Of Water ◽  
Physico Chemical ◽  
Good Ecological Status

AbstractThe main aim of this study was to assess the usefulness of the Biological Diatom Index (BDI) (Lenoir & Coste 1996) for the estimation of water quality in the central section of the Pilica River, located in central Poland in Łódź province. The BDI has never been used before to monitor Polish surface waters. An analysis of the correlations between the values of the BDI and selected physico-chemical parameters was performed, as was an assessment of water quality using the BDI. On the basis of value ranges proposed by Descy and Ector (1996), a good ecological status in the Pilica River was obtained, but this did not correspond with the results achieved from the physico-chemical analysis. This study proposes new value ranges for the BDI. With these new values, the ecological state of the Pilica River changed from good to moderate, which corresponded with the physico-chemical analysis of the water. The new, proposed value ranges for the BDI assess more precisely the quality of water in lowland Polish rivers.

scholarly journals Assessment of the impact of land use in an agricultural catchment area on water quality of lowland rivers

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10564
Author(s):  
Jerzy M. Kupiec ◽  
Ryszard Staniszewski ◽  
Szymon Jusik
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Catchment Area ◽  
Agricultural Land ◽  
Ecological Status ◽  
Chemical Parameters ◽  
Water Conductivity ◽  
Entire Area ◽  
Good Ecological Status ◽  
The Impact

In several countries around the world, agricultural land area exceeds 70% (Uruguay 82.6%, Kazakhstan 80.4%, Turkmenistan 72.0%, Great Britain 71.7%, Ukraine 71.6% and others). This poses a serious risk of dissipating nitrates into the aquatic environment in agricultural catchments. The aim of this study was to assess the impact of land use on water quality parameters in an agricultural catchment area. It was decided to select for analysis the catchment of the Orla River (river length of 88 km, catchment area of 1,546 km2). The catchment area is predominantly agricultural in character and its entire area has been declared as an agricultural nitrate vulnerable zone (NVZ). A total of 27 survey sites were selected on the main watercourse and its tributaries. Analyses were conducted in the years 2010–2012 to determine physical and chemical parameters of water (pH reaction, conductivity, dissolved oxygen, total nitrogen, organic nitrogen, ammonia nitrogen, nitrates, total and reactive phosphorus) as well as six macrophyte metrics of ecological status assessment (MIR, IBMR, RMNI, MTR, TIM, RI). The average values of most physico-chemical parameters of water quality repeatedly exceeded limits of good ecological status, both in the Orla River and its tributaries. As many as 18 survey sites were classified as moderate ecological status, five sites as poor and only four as good ecological status. The results indicate the impact of land use in the catchment on water conductivity. Differences were observed in the concentrations of biotic components in the main watercourse and its tributaries, and in water quality in the southern part of the catchment in relation to the rest of the study area. This is probably connected with a greater share of forests and surface waters in that area.

Zooplankton Species Associations in Quebec Lakes: Variation with Abiotic Factors, Including Natural and Anthropogenic Acidification

1990 ◽  
Vol 47 (1) ◽  
pp. 110-121 ◽  
Author(s):  
Bernadette Pinel-Alloul ◽  
Ginette Méthot ◽  
Ghislain Verreault ◽  
Yvan Vigneault
Keyword(s):  
Environmental Variability ◽  
Abiotic Factors ◽  
Zooplankton Species ◽  
Separate Species ◽  
Environmental Property ◽  
Lake Morphology ◽  
Species Abundances ◽  
Physical And Chemical Variables ◽  
Abiotic Variables ◽  
Physical And Chemical

Abundances and biomass of 38 zooplankton species and accompanying abiotic data from 54 Quebec lakes were subjected to cluster and correlation analysis to determine (1) characteristic zooplankton associations of cooccurring species, (2) relative importance of abiotic variables in lake typology, and (3) relationships between the integrated environmental factors derived from lake morphometry, water quality, and acidification level, and the structure of zooplankton communities. The eight groups of species identified in the cluster analysis may be considered separate "species associations" characterized by distinct patterns of distribution in Quebec lakes. Differences in mean pH and sulphate concentrations can be detected between groups of lakes representing the different species associations. Factor analysis produced seven factor scores which explain 82% of the total variance of the morphological, physical, and chemical variables. The distribution pattern of acidity or alkalinity represents the major feature in water chemistry variation, but lake morphology also account for the observed environmental variability. Each factor represents an integrated environmental property correlated with a set of colinear abiotic variables. These factors are correlated with zooplankton species abundances and biomass. The community structure, whether expressed in size classes or in trophic groups, tends to vary among sets of lakes of different pH.

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