Assessing trophic state of surface waters of Służewiecki Stream (Warsaw) (original) (raw)
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New approach to trophic state assessement of running waters in Poland
Meteorology Hydrology and Water Management, 2014
The problem of eutrophication has, since the 1970s, reached a global scale and become a problem of principal importance due to its negative consequences, which could result in the total loss of biospheric functions of aquatic ecosystems, and also their economic role. The increasing intensity of eutrophication processes and their specificity in various types of waters requires the development of special methods of control and protection of aquatic ecosystems. As a result of the high dynamism of eutrophication and its dependence on different factors (hydrological, hydrodynamic, hydrobiological, morphological, edaphic and climatic conditions), the assessment of trophic status in order to control and manage this process is very complicated. The evaluation of the consequences of anthropogenic eutrophication and the scale of its development can be provided only on the basis of systematic observation during a multi-annual period. Careful analysis of the state of knowledge on the issues related to eutrophication, especially the methods of trophic status assessment, have allowed us to conclude that at present there is no universal methodology for the assessment of the surface water trophic level, while the existing methods have various shortcomings, which reduce the reliability of the results and complicate the development of appropriate technical, organizational and legal protection measures. A critical analysis of trophic status assessment approaches for different categories of waters has also allowed us to state that there is no an appropriate method for the assessment of the trophic status of running waters, since almost all existing assessment methods are developed for lakes and coastal areas. This paper presents an original approach elaborated for the assessment of the trophic state of running waters based on the statistical analysis of long-term monitoring data and numerical criterion ITS, which allows for a simple and low-cost monitoring of eutrophication suitable for the solving of different application tasks in the field of surface water protection.
The trophic status of Suwałki Landscape Park lakes based on selected parameters (NE Poland)
This study describes changes in the trophic status of 12 lakes within Suwałki Landscape Park (SLP). All of the trophic classifications of the lakes were based on the trophic continuum division. Trophic status was determined by means of multiparameter indices using several diverse criteria. In this study, the assessment of the trophic status of lakes included water quality; abundance and biomass of bacterioplankton, phytoplankton, and zooplankton; and primary production of phytoplankton. The Carlson trophic state index (TSI) describes the level of water fertility and indicated the dominance of moderately eutrophic waters. Lakes Perty, Jeglówek, and Hańcza have a trophic status that indicates mesotrophy (TSI <50). The trophic status of the studied lakes was determined based on the bacterial abundance and clearly showed a lack of oligotrophic lakes in SLP. Based on the number of bacteria, only Lake Szurpiły can be classified as β-mesotrophic, whereas Lake Linówek can be characterized as hypertrophic with some features typical for humic waters. The greatest value of gross primary production was observed in Lake Linówek (126.4 mg C/m 3 /h). The phytoplankton trophy index varied from 1.59 to 2.28, and its highest value, which indicated eutrophy, was determined for Lake Udziejek. In the case of Lakes Hańcza, Szurpiły, Perty, Jeglówek, and Kojle, the index ranged from 1.25 to 1.74, which indicated mesotrophy. The majority of the lakes were classified as mesoeutrophic (1.75-2.24). The highest trophic status was assessed for lakes with a marked dominance of cyanobacteria (Lake Przechodnie, Lake Krajwelek, Lake Udziejek, and Lake Pogorzałek), which is commonly recognized as an indicator of high trophic status. Considering all of the indices of trophic status, the analysis of rotifer community structure indicates that the studied group of lakes is mesoeutrophic or eutrophic. The values of crustacean zooplankton indices indicated that the trophic status of the studied lakes was close to that determined using a TSI. The parameters of zooplankton abundance and species structure allowed for the observance of changes in the tropic levels of lakes, which are difficult to detect by a chemical assay alone.
Due to the intensive mixing polymictic lakes should be homogenous. However, morphometric diversity and high water dynamics contribute to the differentiation of many parameters in various areas of the lakes. This study analyzes both phytoplankton and zooplankton to assess differences in water quality along the north-south axis of the longest lake in Poland. New phytoplankton indicators were applied for determining the lake's ecological status: the Q index based on functional groups and the PMPL (Phytoplankton Metric for Polish Lakes) index based on phytoplankton biomass. TSI ROT index (Rotifer Trophic State Index), which comprises the percentage of species indicating a high trophic state in the indicatory group and the percentage of bacteriovorus in the Rotifera population, was used for zooplankton analysis.
Rusałka and Uzarzewskie lakes are two small, flushed water reservoirs situated near Poznań. The aim of the conducted research was to estimate seasonal and vertical changes of phosphorus concentration in bottom sediments and overlying water. The mean concentration of phosphorus in bottom sediments was somewhat higher in Uzarzewskie Lake - 1.15 mg P g -1 d.m. than in Rusałka Lake - 0.98 mg P g -1 d.m. In Rusałka Lake, higher mean concentration of phosphorus was found at a place situated in littoral, whereas in Uzarzewskie Lake, at the deepest place. Maximum values observed in both lakes were very similar and amounted to 1.55 mg P g -1 d.m. (Rusałka Lake) and 1.52 mg P g -1 d.m (Uzarzewskie Lake). In case of overlying water, higher mean concentration of phosphorus was observed in Uzarzewskie Lake (0.84 mg P l -1 ), than in Rusałka - 0.26 mg P l -1 . Higher values usually appeared at the station situated in the deepest place of the lake.
Limnologica - Ecology and Management of Inland Waters, 2010
The EU Water Framework Directive includes phytoplankton as one of the four biological elements to be used in the assessment of the ecological status of surface waters. In this work we establish the ecological status of four shallow lakes in the Polesie Region of Eastern Poland on the basis of phytoplankton and physicochemical data from the lake water. A number of recently developed phytoplankton indices, including the Carlson Index, Q index and German PSI were compared. Cyanoprokaryota, chlorophytes and dinophytes dominated in Lakes G"ębokie and Sumin, while in the Lakes Rotcze and Maśluchowskie the biggest share belonged to Chlorophyta. On the basis of the Carlson Index, Lake G"ębokie had the highest trophic score, while the lowest score was for Lake Rotcze. A similar result was also found with the Q index which indicated a good ecological state for Lake Rotcze (Q ¼ 3.5), a bad state for Lake G"ębokie (Q ¼ 0.9), a poor status for Lake Sumin (Q ¼ 1.2) and a moderate status for Lake Maśluchowskie (Q ¼ 2.9). Similar results were obtained with the use of the German PSI which classified Lake G"ębokie as bad status (PSI ¼ 4.7) and Lake Rotcze as good (PSI ¼ 2), although differences between the 2 indices appeared between the moderate and poor status lakes (respectively in the case of Lake Sumin-PSI ¼ 2.6 and Lake Maśluchowskie-PSI ¼ 4.4).
Phytoplankton of eutrophic lakes in Western Poland
Verhandlungen, 1991
The investigations were carried out on a group of 20 lakes situated in the Miçdzychód-Sieraków Lake District on the left bank of the Warta River. Al! of them were formed during PoznaiÍ substage of the Baltic glaciation so they are the reservoirs of equal age. However, they differ with respect to size (1.96 to 304.3ha), maximum depth (from 3.5 to 45.0 m), mean deRth (from 1.7 to 20.2 m), volume (0.034 to 25.06 mln m), catchment area (30 to 6060 ha) and management (e. g. forest coverage-3 to 100%), and also to the degree of contamination with municipal sewage and with loads from non-point pollution sources. This had a considerable effect on trophic state of the lakes expressed, for example, as different species composition and abundance of phytoplankton.
Trophic state and recreational value of Lake Mikołajskie
Limnological Review, 2016
Lakes along with their surroundings are an attractive landscape component that play an important role in recreation and relaxation. In Poland, the Great Masurian Lakeland, visited by a million tourists every year, is considered to be the most attractive lake area. However, tourist pressure has several negative effects which cause degradation of the water environment. The aim of this study was to determine the trophic state of Lake Mikołajskie which is a hub for sailing and motorboating traffic. Values of the trophic status index were calculated from the content of total phosphorus, chlorophyll
Polish Journal of Natural Science
The goal of our studies was to determine the taxonomic composition of phytoplankton and physico-chemical water properties in selected lakes and reservoirs in Western Poland to estimate the influence of restoration measurements. Polimictic Maltański Reservoir (restored by means of phosphorus inactivation and biomanipulation) was characterized by increased concentrations of ammonium nitrogen as well as chlorophyll a (over 100 μg l –1 in autumn 2011), related to cyanobacteria bloom. Slightly lower values of chlorophyll-a were noted in Sławskie Lake (ca. 42 μg l –1 , sewage inflow divertion), where organic nitrogen and orthophosphate content increased in time in analyzed season. Lowest concentrations of phosphorus were noted in Głębokie Lake (aeration and phosphorus inactivation), while a little bit higher were observed in polimictic Turawa Średnia Reservoir (also aeration and phosphorus inactivation). The latter water body was characterized by some increases in the abundance of cyanoba...
Phytoplankton metrics response to the increasing phosphorus and nitrogen gradient in shallow lakes
Journal of Elemntology, 2012
A new phytoplankton-based method (the Phytoplankton Metric for Polish Lakes -PMPL) for the ecological status assessment of lakes has been developed in Poland. This method has not been validated and tested on independent data, hence the aim of the study was to check the applicability of this method and the sensitivity of different phytoplankton metrics along pressure gradient. Phytoplankton data were collected from 33 Polish lowland lakes (20 stratified, 13 non-stratified), during the growth season in the period from 2005 to 2009. The biomass of phytoplankton was calculated from cell volume measurements and chlorophyll a concentration was determined spectrophotometrically by the alcohol method. Total nitrogen and total phosphorus concentrations were determined by standard methods (PN-EN ISO 6878:2006p.7 and PN-EN 25663:2001, respectively) and water transparency was measured using a Secchi disk.