Saprobic Index Research Articles

Biological Indicators of Water Quality of Drenova Reservoir (Bosnia and Herzegovina)<sup>1</sup>

This paper presents the state of biota of Drenova reservoir in Bosnia and Herzegovina (BH) as water quality indicator. The Drenova reservoir has a multiple role: protection of the Vijaka river basin from floods, provision of water for the Prnjavor fishpond, as well as sport fishing. Bearing in mind the multifunctionality of this reservoir, but also the scarcity of data on the biota of this water body, in 2017, research on phytoplankton, zooplankton, macrozoobenthos and ichthyofauna was performed. Based on the obtained results (qualitative and quantitative composition, saprobic index according to Pantle Buck, Shannon index), it was established that the water of Drenova reservoir, as far as phytoplankton and zooplankton community is concerned, corres-ponds to the transition from oligosaprobic to β-mesosaprobic waters while macrozoobenthos and ichthyofauna refer to β-mesosaprobic water. A small number of representatives of phytoplankton (both qualitatively and quantitatively) is noticeable, as well as the absence of species common to this type of aquatic ecosystems in the observed period. The state of macrozoobenthos taxa is expected considering the properties of the substrate of this accumulation. Ichthyocenosis is characterized by a small number of species, but also by a small number of individuals within those species.

Planktonic algoflora of small rivers in urban conditions (on the example of the Mirozhka and Pskova rivers, Pskov, the Pskov Region)

The paper studies the planktonic algoflora of the Mirozhka and the Pskova Rivers. The research was carried out in the early autumn period of 2019. The taxonomic composition of the Mirozhka River included 107 species and intraspecific taxa of microalgae, the Pskova river 76 species taxa of algae from 7 phylums: Bacillariophyta, Cyanobacteria, Chlorophyta, Ochrophyta, Cryptophyta, Euglenozoa, Miozoa. The basis of the floral complex in both rivers were diatoms and green algae. The representatives of the Ochrophyta department also made a visible contribution to the species richness of the algoflora of the Mirozhka River. The degree of floral similarity of phytoplankton communities of the Mirozhka and Pskova rivers, calculated using the Sorensen-Chekanovsky index, was 55,7% (51 species of microalgae were common to the rivers). The average phytoplankton abundance in the Mirozhka River was 891,9 thousand cells/l, and in the Pskova river 199,6 thousand cells/l, biomass 366,9 micrograms/l and 79,6 micrograms/l, respectively. According to ecological and geographical analysis, freshwater widespread planktonic forms of microalgae predominated in both rivers, preferring slightly alkaline waters. Beta-mesosaprobionts prevailed in relation to organic matter pollution in rivers (38,5% the Mirozhka River; 41,8% the Pskova River), which indicates moderate pollution of the studied watercourses. The average saprobity index of the Mirozhka River and the Pskova River was 2,1 and 1,9, respectively, which makes it possible to attribute the waters of the studied watercourses to the 3rd class of quality moderately polluted.

ВНУТРИГОДОВАЯ ИЗМЕНЧИВОСТЬ ПЛАНКТОННЫХ СООБЩЕСТВ УСТЬЕВОЙ ОБЛАСТИ РЕКИ СЕВЕРНАЯ ДВИНА

The paper summarizes the results of monthly studies of phyto- and zooplankton communities of the estuarine region of the Northern Dvina, conducted during environmental monitoring from November 2020 to January 2022 at the water intakes of JSC “Arkhangelsk Pulp and Paper Mill” (Novodvinsk) and LLC “RVC-Arkhangelsk” (Arkhangelsk and Silikatchikov settlement). Based on the results of plankton surveys, the qualitative composition was studied and the intra-annual variability of quantitative indicators and structural features of plankton communities was described. In phytoplankton, 273 intraspecific taxa of microalgae were found, among which diatoms predominated (159 taxa). The indicators of abundance and biomass changed synchronously during the entire observation period. Primary production and P/B coefficients were at the level of digital values for the Arctic zone. The Shannon Index identified the phytoplankton community as medium-complex in a stable state. 45 species belonging to 4 systematic groups were found in zooplankton. Seasonal dynamics of zooplankton was characterized by 2 peaks of abundance and biomass – in November 2020 and July 2021. By species composition, the zooplankton community in the water intake areas in February–June 2021 it can be characterized as a kladocern, in July – as a rotifer-kladocern-copepod, in August as a rotifer-kladocern, and December can be considered the end of the growing season.
 The degree of contamination was assessed according to the index of saprobity of phytoplankton and zooplankton. It was found that the state of the waters of the Severnaya Dvina River in the study area corresponded to the oligo-β-mesosaprobic zone or class II water quality (moderately polluted).

СОСТОЯНИЕ ПЛАНКТОННЫХ СООБЩЕСТВ НИКОЛЬСКОГО УСТЬЯ РЕКИ СЕВЕРНАЯ ДВИНА В ОСЕННИЙ ПЕРИОД 2022 ГОДА

The work is part of the environmental monitoring of the Nikolskaya estuary. Severnaya Dvina, carried out in 2022, with the aim of comprehensive research of aquatic biological resources and their environment. Information was obtained on the species diversity and structure of plankton communities of the studied object belonging to the drainage basin of the Severnaya Dvina River. The taxonomic composition of phytoplankton and zooplankton in the navigation period of 2022 is shown. Species diversity was assessed using the Shannon index, based on the relative abundance of species, the Menhinik, index, which determines species richness, the average abundance and biomass of phytoplankton of the Nikolsky Estuary were determined. The Pantle-Bukka saprobity index was calculated to assess the pollution of natural waters. According to observations, 53 algae taxa with a rank below the genus and 21 zooplankton organisms have been registered. It was found that the basis of algoflora was diatoms. Copepoda copepods formed the basis of the zooplankton community. New data on the state of phytoplankton and zooplankton communities can serve as an informational and methodological basis for the development of environmental monitoring programs for aquatic ecosystems in the region.

Differences in Phytobenthic Diatom Community between Natural and Channelized River Sections.

The structure of phytobenthic diatom communities was studied to reveal differences between natural and channelized river sections in Slovenia. As part of the national monitoring of surface waters, samples of phytobenthos were collected at 85 sites throughout the country according to standard protocols. At the same time, basic environmental parameters were also assessed. Trophic (TI) and saprobic (SI) indices were calculated based on diatoms and other algae, while diversity indices and gradient analyses were performed only for the diatom community. The results showed that channelized rivers harbor significantly more diverse benthic diatom communities than natural sections, mainly due to the significantly higher number of motile diatom taxa that are able to take advantage of more nutrient-rich and less-shaded river sections because of their high adaptability. Selected environmental parameters explained 34% of the variability in diatom community structure when taxa were classified into ecological types. The removal of Achnanthidium minutissimum yielded clearer results (24.1%) than the total species matrix (22.6%). Therefore, we suggest excluding this taxon from calculations of TI, SI, or other indices when it is determined as A. minutissimum complex, because A. minutissimum complex was most abundant in both types of reaches in our study and has a wide ecological amplitude, which reduces the indicative power of the diatom community in the evaluation of environmental conditions and ecological status.

Assessment of the Current Trophic Status of the Southern Baikal Littoral Zone

Eutrophication is a major ecological problem and affects and endangers freshwater bodies, making assessment of the trophic status of water bodies crucial for their restoration and sustainable use. Lake Baikal is affected by a number of environmental stressors, including coastal eutrophication. Daily measurements of concentrations of nutrients, dissolved oxygen (DO), chlorophyll-a (Chl-a), weekly measurements of algae abundance and biomass in the open water season in June-December 2020, and measurements of concentrations of nutrients at 2–7-day intervals in June-October 2021 were made in the littoral of the South Baikal for the first time. It was shown that nitrate and phosphate concentrations decreased by July-August, their minimum content was maintained until September, concentrations began to increase in October and reached a maximum in December. The maximum abundance and biomass of algae and chlorophyll concentrations were only observed in early July. Storm situations increased the content of nitrogen, phosphorus and DO in water, the duration of their influence was not more than 2 days. A correlation matrix revealed significant positive correlations of NO3−-DO, phosphate (SPR)-NO3−, SRP-DO and biomass-Chl-a and strong negative correlations between water temperature (Tw)-DO, Tw-NO3−, Tw-total nitrogen (TN) and Tw-SRP. Based on SRP and NO3− concentrations and TN:TP ratios, it was concluded that algal development was limited to nitrogen and phosphorus in summer. The trophic status of the Southern Baikal littoral zone was assessed using classifications based on TN, TP, NO3−, SRP, Chl-a content and algal biomass, as well as the Carlson index (TSI) and probabilistic assessment. The results of assessments using different methods of trophic status determination showed that the Baikal littoral zone in the study area belongs to the oligotrophic type with minor elements of mesotrophy. According to the saprobity index, water purity of littoral waters varies within the oligosaprobic and β-mesosaprobic zones and corresponded to quality classes II and III (clean and moderate purity); the system demonstrates a high capacity for self-purification.

Are quality biological indices universally useful? Limits of benthic based indices in a brackish and arid sub‐basin from Argentina

AbstractThe water quality of rivers belonging to an arid sub‐basin in northern Argentina was evaluated in a longitudinal gradient, during the period of maximum dryness in 2017. The composition and structure of the phytobenthos were studied using biotic indices. A total of 126 spp. were determined, with a predominance of diatoms and Cyanobacteria. Most of the diatom species found were meso to polyhalobus and tolerant to organic contamination. Despite the rivers of the basin cross areas with very different land uses, no differences were recorded in phytobenthos abundances between sites. The Pantle & Buck Saprobity index classified the sub‐basin in the α‐mesosaprobability range, and the diatomaceous eutrophication/pollution index assigns poor quality to most of the sites. Salinity should induce phycoflora homogenization that limits the sensibility of biotic indices to anthropogenic impacts.

Heavy Metals Configuration in Different Saprobic Level of Water Bodies

The environmental conditions for aquaculture needs to be done in line with pollution that occur in waters which is categorized by saprobic index. The heavy metals content in cultured organisms present in the different levels of saprobity was informed by geospatial analysis through the overlay method. The Pb, Cd and Cr content were taken from tissues of milkfish, wild white shrimp and vaname shrimp. An Ikonos satelite Imagery data of Semarang used for geospatial analysis. The research was carried out from June to October 2021 in the brackish water ponds At Tugu district, Semarang, Central Java. The level of saprobity reported in oligosaprobic up to β-mesosaprobic which means lightly polluted to heavily polluted. The content in the water bodies (mg/L) of Pb 0.046 to 0.105, Cd 0.033 to 0.062 and Cr from 0.018 to 0.054 has exceeded the permittable level. Meanwhile, in the pond sediment (mg/kg) : Pb 3.56-6.93; Cr 1.08-3.01 is within permittable limits, however, Cd 1.77-3.53 has exceeded permittable levels. The content of heavy metals (mg/kg) in the tissues of milkfish, wild shrimp and white leg shrimp (L. vannamei): Pb 0.27 to 0.39, Cr 0.16 to 0.23 and Cd from 0.12 to 0.22 is still within permittable limits

БИОИНДИКАЦИОННАЯ ЗНАЧИМОСТЬ ТАКСОНОМИЧЕСКИХ И СТРУКТУРНЫХ ПОКАЗАТЕЛЕЙ АЛЬГОЦЕНОЗОВ МАЛОЙ РЕКИ ПРИ ОЦЕНКЕ ТОЧЕЧНОГО ИСТОЧНИКА АНТРОПОГЕННОГО ВОЗДЕЙСТВИЯ

Phytoplankton studies were carried out in a small river (the Usa River, the Kuibyshev Reservoir basin) in the area affected by a point source of pollution. Comparative analysis revealed a change in the structure of phytoplankton in the wastewater discharge zone of the village of Shigony (Samara region). An increase in the saprobity index, a variety of species-indicators of an increased degree of saprobity, as well as an increase in the role of small-celled species in the community in this area are shown. At the same time, the species diversity at the discharge site and downstream is comparable to other parts of the river. The saprobity indices are within the β-mesosaprobic zone, quality class III (moderate pollution). In general, the impact of wastewater during the study period is localized at the place of discharge.

Assessment of the ecological situation long-term transformations in the Ivankovo reservoir

The work is devoted to the evaluation of the new concept of integrated monitoring practical application results. The theoretical novelty of the concept consists in the joint analysis of diatom complexes from columns of bottom sediments and modern phytoplankton complexes. The work confirms that there are no processes of redeposition during precipitation formation in all analyzed columns. The results of the water quality assessment by two indexes are considered: the saprobity index (S) and the integral quality index (QI). Comparison and spatial- temporal analysis of the obtained results were carried out. Within the framework of the new concept, the results of chemical analysis of water and sediment samples were used for reference. The main objective of the work was to demonstrate the effectiveness of the new concept of integrated monitoring in assessing long-term transformations occurring in reservoir.

Bioindication of the water quality of some reservoirs of the Rostov region (Russia)

The paper presents the results of a preliminary bioindication of some reservoirs of the Rostov region (rivers Seversky Donets, Kundryuchya, Temernik, Mokryj Chaltyr, Mius, Olkhovchik). The analysis showed that there is a large species diversity of algae in the reservoirs. The values of the Shannon diversity index (1,74–2,91) and the evenness index (0,30–0,76) indicate the complexity of the structure and high biodiversity of the phytoplankton community. Diatoms were the main component of phytoplankton that allowed bioindication. They accounted for up to 20% of the total number of indicator species. The saprobic index (1,93–2,47) correspond to the III class of water quality and is mainly a β-mesosaprobic zone. They are waters slightly polluted with organic substances, but they have a sufficient degree of environmental sustainability and self-cleaning potential of the river ecosystem.

A Saprobic Index for quality of Minapadi Water and the Fish Osmotic Performance Level of Minapadi

Ending hunger is one of the Sustainable Development Goals (SDG) that must be achieved to achieve prosperity. The supply of these food needs connects with human dwelling requirements. Numerous technologies have been developed to solve these difficulties. One of these technologies is minapadi, which uses land effectively. For sustainability objectives to be realized, using such technology must preserve environmental quality. This research intends to assess changes in water quality resulting from the usage of minapadi, as well as fish osmosis performance in minapadi. This research is performed to determine the effect of minapadi technology on water and fish. Samberembe Sleman is the location that has been adopting minapadi for a long time and is the Food and Agriculture Organization of the United Nations (FAO) pilot site. In order to acquire data for use in computing the Tropic Saprobity Index, the minapadi water of Samberembe was collected monthly for four months during the study. Blood samples from tilapia (Oreochromis niloticus) were collected in the fourth month to determine osmotic performance levels. The acquired findings have the highest SI value of 0.986 and the lowest SI value of 0.968. The state of β (meso/oligo saprobik) has the highest TSI value with a value of 1.011, while the state has the lowest TSI value with a value of 0.995 β (meso saprobik). Iso-hyperosmotic is the pattern of osmoregulation in tilapia (Oreochromis niloticus) in minapadi. Stable SI and TSI levels at Minapadi do not fluctuate. This result suggests that the water quality is with lightly contaminated water, yet the TSI value indicates that the water is fertile and potable. The normal condition of fish in minapadi indicates that the use of minapadi does not affect environmental conditions.

Донная фауна и оценка экологического состояния нижнего участка р. Ангары

On the Angara River there is a reservoirs cascade of four hydroelectric power stations, and in the lower reaches it is planned to build the Nizhneboguchanskaya HPS. On the other hand, at present there is a significant gap in the studies of the Angara lower section, especially in zoobenthos. The material for the study was zoobenthos samples taken in the coastal zone in August 2022 at 11 river stations in a section from 445 km to 9 km from the mouth. Biotopes of zoobenthos are represented mainly by pebble-sandy soil with varying degrees of silting. The benthic fauna of the Angara River was gammarid-chironomid in nature; oligochaetes were found everywhere, but in small numbers. 87 species and taxa of a higher rank had been identified, the largest number of species (37) was noted among the chironomid larvae of Orthocladiinae and Chironominae. The quantitative advantage (more than 60% of the abundance and biomass) belonged to amphipods. Chironomids predominated over amphipods only on silty bottoms; in the river section, in general, they accounted for 24% of the abundance and 10% of the biomass of benthic communities. The Shannon species diversity index was relatively low and amounted to 2.3 bit/ind. general in the section. The lower reaches of the river were characterized by the highest species diversity, but the lowest number of benthic invertebrates. The total number of zoobenthos in the studied area was 2,9 thousand ind/m2, biomass – 14,6 g/m2, in the lower reaches of the river the number decreased to 1.7 thousand ind/m2, biomass – up to 4 g/m2. An integrated approach was used to assess the water quality of the Angara benthic communities, that includes the analysis of 8 bioindication indices: Goodnight (G), Woodiwiss (TBI) and saprobity (S) indices (recommended by the Russian regulatory document); indices FBI, BMWP, ASPT (recommended by the European Water Framework Directive); the Balushkina chironomid index (K) and the Shannon species diversity index. The fundamental criterion for the selection of indices was the level of development of indicator taxa. The complex assessment revealed the trend of improving water quality to the mouth of the river. This trend is expressed in the consistent dynamics of the TBI, BMWP, ASPT indices, which can be recommended for assessing the ecological state of the Angara River and other watercourses in the region. The water quality corresponded to Class III (Polluted) with a tendency to improve at the mouth to Class II (Slightly polluted).

Saprobic index of bivalve mollusks of families Unionidae and Sorbiculidae distributed in the aquatic ecosystems of Uzbekistan

A correlation between the level of distribution of bivalve mollusks of the families Unionidae and Sorbiculidae and their saprobic characteristics was studied in this article. Polysaprob groups of bivalve mollusks were not found in the lower parts of the rivers during studies, but α-mesasoprobe species that stood close to the polysabrob group comprised 60% of the bivalve mollusks of the families Unionidae and Sorbiculidae. α-mesasoprobe species have been found to include Sinanodonta gibba, Sinanodonta puerorum, Colletopterum cyreum sogdianum, Colletopterum ponderosum volgense, Corbicula rigrigea, Corbiculina tibetensis, Corbiculina ferghanensis which are distributed in the lower Zarafshon and Sirdarya region.

Phytoplankton Saprobity as Pollution Bioindicator: A Study of Genera Chaetoceros in Port of Tanjung Emas Waters, Semarang

Water fertility is an assessment of the condition of organism diversity in relation to aquatic ecosystems. PTES (Port of Tanjung Emas, Semarang) is a major port in Java Sea waters and a domestic port for commercial vessels. Its water condition is influenced by the activities of both commercial and fishing vessels. This research applied a descriptive method with cluster sampling, including a group of samples in the port pool and samples from outside the port pool as a control station (comparator). The research aimed to analyze pla nkton fertility through the analysis of plankton abundance (N) and analyze factors that support the fertility of the waters, such as physicochemical parameters. In this research, diatoms ( Bacillariophyceae ) were found as a class that dominated in the waters with a dominance rate of 95%, meaning that the waters were in β-mesosaprobic condition (moderately polluted). The novelty of this research was the finding of toxic Chaetoceros , which dominated in the waters, resulting in the disappearance of other genera and lower organism abundance and diversity at a higher level. This abundance was a bioindicator that triggered heavy pollution (α-mesosaprobic). Regression analysis showed that phytoplankton abundance was determined by brightness, nitrate, turbidity, and zooplankton abundance. Using factor analysis, there were five factors that affected the total saprobic index (TSI); the largest factor was influenced by the first components (41.49%), including salinity, brightness, temperature, pH, DO, nitrate, and SI. Keywords: Port of Tanjung Emas, water fertility, total saprobic index, factor analysis, physicochemical parameters. https://doi.org/10.55463/issn.1674-2974.50.4.11

Struktur Komunitas Fitoplankton sebagai Indikator Kualitas Air di Kali Mas Kota Surabaya

Phytoplankton is an aquatic organism that is sensitive to environmental changes. Kali Mas is one of the rivers that passes through the city of Surabaya, and is a source of water needs for various domestic and industrial needs. The purpose of this study was to determine the status of Kali Mas water quality based on the phytoplankton community structure, which includes: diversity, abundance, evenness, dominance, and saprobic index. The method used in this study is purposive sampling. Water and phytoplankton samples were taken from 5 stations along the Kali Mas flow. The identification results of the phytoplankton found consisted of 10 classes, which consisted of: Bacillariophyceae (44.19%); Chlorophyceae (6.33%); Chrysophyceae (0.26%); Cyanophyceae (24.9%); Conjugatophyceae (7.49%); Dinophyceae (2.84%); Fragilariophyceae (1.29%); Trebouxiophyceae (8.14%); Ulvophyceae (3.18%); and ‎Xanthophyceae (0.65%). Diversity index ranged from 2.35-2.96; evenness index 0.72-0.87; and the dominance index is in the range of 0.05-0.148. Meanwhile, based on the saprobic index, Kali Mas is at 1.05. This value indicates the condition of Kali Mas waters is in β - Meso/oligosaprobic conditions with a mild level of pollution.

Plankton Community Structure in the Mangrove Waters of Leuweung Sancang Nature Reserve, Garut Regency

This study aims to determine the structure of plankton communities as an estimator of water quality status in the Leuweung Sancang Nature Reserve, Garut Regency, West Java. This research was conducted on October 19 – November 8, 2021. Sampling was carried out at five stations, namely located close to settlements and having a small mangrove area, on the outskirts of the Cipalawah River so that mangrove areas get nutrients from rivers, in delta areas facing tides and rivers, behind deltas that do not directly get nutrients from the sea or rivers and areas that directly face seawater and have the largest mangrove area. The results showed that plankton abundance ranged from 2840 – 3835 ind / L and had a saprobic index ranging from 1.10 – 1.13. Based on the results of the study, the abundance of plankton in the Leuweung Sancang Nature Reserve is categorized as moderate and indicated by mild pollution as seen from the saprobic index.

INDEKS STRUKTUR KOMUNITAS DAN SAPROBITAS PLANKTON SERTA CHECKLIST KEBERADAAN NEKTON DI PERAIRAN DANAU BERATAN, BALI

Beratan Lake was mainly popular for tourism and aquaculture activities that affecting water's environmental characteristics. The water healthiness indicator can be seen through the organism's existence, namely plankton to nekton biota that can be uses as an essential parameter in monitoring water conditions. This study aims to determine the plankton community structure index, saprobity index and the presence of nektons in the Beratan Lake. Plankton were sampled using the pouring method while the nekton sample was taken randomly through direct sampling with fishing nets and conducted interviews with the surrounding local community and fishermen. The results of the study found that the abundance of phytoplankton was dominated by Staurastrum with abundance level 1,836.92 ind/L. Meanwhile, the zooplankton was dominated by Rotifera with abundance level 8.17 ind/L. The diversity index, uniformity and dominance of phytoplankton are 1.31, 0.60 and 0.33 respectively, while the saprobity index is 1.08 which classifies the waters of Beratan Lake as being in a lightly polluted condition. There were 18 species of nektons in Beratan Lake were found, with one endemic species Rasbora balinensis and 13 foreign fish. There also an invasive species, namely zebrafish (Amatitlania nigrofasciata) was found in this Lake. From the results of the study, we hope that the government in cooperation with the surrounding community, can control the ecological conditions of the waters of Beratan Lake, especially the presence of invasive species which are increasing in number, as well as protect endemic species.
 Keywords: Abundance; beratan lake; community structure; plankton; saprobity

Spatial Distribution of the Taxonomic Diversity of Phytoplankton and Bioindication of the Shallow Protected Lake Borovoe in the Burabay National Natural Park, Northern Kazakhstan

The Burabay National Natural Park unites six lakes located among the steppe landscape, with Lake Borovoe being the most visited among them. The phytoplankton of the protected Lake Borovoe was examined in the summer season of 2019, at eight stations, which were defined for the first time as the monitoring sites on the lake surface. Altogether, 72 algae and cyanobacteria species from seven taxonomic phyla were found in the Lake Borovoe phytoplankton during the study period. The most species-rich were three phyla: diatoms, green algae, and cyanobacteria. The average phytoplankton abundance was 3012.6 cells L−1, and biomass was 2383.41 mg L−1. The ecological status of the lake in 2019 was assessed based on the species richness, abundance, biomass, and calculated indices of organic pollution and toxic impact. The statistical mapping, calculated community similarity, correlation, and Redundancy Analysis (RDA) revealed zones affected by human impact. These were located in the lake shores and low-alkaline water with the saprobity index of 1.63–2.00. This is typical for naturally clean lakes, indicating the oligotrophic-to-mesotrophic status of the lake during the study period. The increase in cyanobacteria species in coastal communities can be associated with an increase in the biogenic load on the lake ecosystem in recent times. Therefore, our multivariate analysis allowed us to assess the ecological state of Lake Borovoe, which can be the result of the interaction of many external environmental factors, such as climatic conditions, long-term accumulation of organic substances, the intensity and duration of anthropogenic press, and internal lake processes such as the development of algae communities. The results suggest a tendency for the eutrophication of Lake Borovoe to increase because of pollution coming from the human impact zones on the lake shores.

Zoological Water Quality Indicators for Assessment of Organic Pollution and Trophic Status of Continental Water Bodies

Abstract This paper presents data compilation for invertebrates and protists indicator taxa of organic pollution and trophic state of continental waters. Information was collected from research papers, monographs, electronic resources, and our own research. Altogether 1732 indicator taxa of Kingdoms Protista, Protozoa, Chromista, and Animalia from 19 taxonomical Phyla are represented with ecological preferences for saprobity with saprobity index (S) and trophic state. This comprehensive data can be used for the purpose of aquatic ecosystem assessment and monitoring of water quality based on bioindication methods.