Various Types Of Water Bodies Research Articles

The use of the integrated trophic state index in evaluation of the restored shallow water bodies

The aim of this study was to determine the trophic status of five restored shallow lakes from a group of 30 water bodies in the Olsztyn Lakeland, which were dried in the 19 century as part of a land reclamation program. The effectiveness of the Integrated Trophic State Index (ITS) in the evaluation process was analyzed. ITS is a relatively new method for diagnosing eutrophication intensity. It analyzes the balance between production processes and organic matter decomposition through simultaneous measurements of oxygen saturation and pH of water. ITS is a versatile tool which can be applied in various types of water bodies. In this study, it was used to evaluate shallow water bodies characterized by excessive phosphorus loads and susceptibility to blue-green algal blooms in summer. During a three-year study carried out in 2010–2012, significant correlations were observed between %O2 and pH, which is a basic prerequisite for applying the ITS method. In the analyzed water bodies, correlation coefficients were determined in the range of r = 0.68–0.83. ITS values varied in successive years ITS (from 7.73 to 8.67), ranging from eutrophy to hypertrophy. Most ITS scores were consistent with the values of Carlson’s TSI, which indicates that used integrated trophic state index, based on the values of water pH and oxygen saturation, accurately reflect the ecological status of degraded water bodies.

Distribution of the Amur sleeper (Perccottus glenii Dybowski, 1877) in Belarus

The distribution in waterbodies and watercourses of Belarus of an alien fish species, the Amur sleeper Perccottus glenii Dybowski, 1877, is studied. In Belarus, the Amur sleeper was recorded for the first time in the middle of the 1970s. At present, this invader is widely distributed in this republic and was found in the basins of all its main rivers. Most localities of capture of the Amur sleeper in Belarus are small closed waterbodies of various types. Introduction is an important factor in the process of distribution of the Amur sleeper in the investigated area.

In Situ Characterization of Resuspended-Sediment Oxygen Demand in Bubbly Creek, Chicago, Illinois

Sediment oxygen demand (SOD) can be a significant oxygen sink in various types of water bodies, particularly slow-moving waters with substantial organic sediment accumulation. In most settings in which SOD is a concern, the prevailing hydraulic conditions are such that the impact of sediment resuspension on SOD is not considered. However, in the case of Bubbly Creek in Chicago, the prevailing slack water conditions are interrupted by infrequent intervals of very high flow rates associated with pumped combined sewer overflow (CSO) during intense hydrologic events. These events can cause resuspension of the highly organic, nutrient-rich bottom sediments, resulting in precipitous drawdown of dissolved oxygen (DO) in the water column. To address this issue, a new in situ experimental apparatus designed to achieve high flow velocities was implemented to characterize SOD, both with and without sediment resuspension. In the case of resuspension, the suspended sediment concentration was analyzed as a function of ...

Comprehensive Characteristics of Bottom Sediments of Water Bodies of Various Types in the Kiliya Delta of the Danube River

Comprehensive Characteristics of Bottom Sediments of Water Bodies of Various Types in the Kiliya Delta of the Danube River

Influence of UV-Radiation on the Content of Chlorophyll a and on the Intensity of Phytoplankton Photosynthesis in Water Bodies of Various Types

Results of the study of the influence of ultra-violet radiation on the content of chlorophyll a, on the potential photosynthetic activity, and on the intensity of oxygen production by phytoplankton of water bodies of various types are given in the paper. The response of freshwater plankton algae to the influence of UV-radiation was revealed.

Peculiarities of the Distribution of Aluminum among Its Coexisting Forms in Surface Water Bodies of Various Types

Results of the study of the coexisting forms of aluminum in surface water bodies of different types (reservoirs, lakes, and rivers) are discussed in the paper. It has been found that the distribution of Al(III) among suspended and dissolved forms depends not only on the content of suspended matter in the water, but also on its nature (mineral or organic suspended matter). Relationship between the mass of suspended matter and the content of aluminum in the composition of suspended matter was not established. The concentration of Alsusp increased in the case of a predominance of mineral suspended matter, which was observed on the example of river waters. The dissolved forms of aluminum were represented mainly by its complex compounds with dissolved organic matter of various chemical nature and molecular mass. The content of aluminum labile fraction varied over a wide range and increased from spring until summer. Either anionic, or neutral compounds predominate among the complexes of Al(III) with dissolved organic matter, which depends on the peculiarities of the component composition of organic matter in water bodies. The complexes of Al(III) with dissolved organic matter are formed mainly at the expense of the compounds with a rather low molecular mass (≤ 2 kDa).

The association between non‐biting midges and Vibrio cholerae

Vibrio cholerae is a natural inhabitant of aquatic ecosystems, yet its interactions within this habitat are poorly understood. Here we describe the current knowledge on the interaction of V. cholerae with one group of co-inhabitants, the chironomids. Chironomids, non-biting midges (Chironomidae, Diptera), are an abundant macroinvertebrate group encountered in freshwater aquatic habitats. As holometabolous insects, chironomids start life when their larvae hatch from eggs laid at the water/air interface; through various feeding strategies, the larvae grow and pupate to become short-lived, non-feeding, adult flying insects. The discovery of the connection between V. cholerae and chironomids was accidental. While working with Chironomus transavaalensis, we observed the disintegration of its egg masses and searched for a possible microbial agent. We identified V. cholerae as the primary cause of this phenomenon. Haemagglutinin/protease, a secreted extracellular enzyme, degraded the gelatinous matrix surrounding the eggs, enabling bacterial growth. Observation of chironomids in relation to V. cholerae continuously for 7 years in various types of water bodies in Israel, India, and Africa revealed that environmental V. cholerae adhere to egg-mass surfaces of various Chironomini ('bloodworms'). The flying adults' potential to serve as mechanical vectors of V. cholerae from one water body to another was established. This, in turn, suggested that these insects play a role in the ecology of V. cholerae and possibly take part in the dissemination of the pathogenic serogroups during, and especially between, epidemics.

Zoosporic aquatic fungi growing on avian excrements in various types of water bodies

Coprophilic fungi in the water from six different water bodies were studied between 1995–1997. For hydrochemical analysis samples of water were collected every three months while for estimation of fungus content every month. Excrements of 3 phytophagous (greylag goose, roman-nosed goose, mute swan), 4 carnivorous (grey heron, white stork, marsh harrier, cormorant) and 3 omnivorous bird species (musk-duck, mallard, black-headed gull) were used as bait. Thirty-six fungus species growing on avian excrements in the water of all examined water bodies were found, 6 of these species belonged to Chytridiomycetes and 30 to Oomycetes. The largest number of fungus species was detected on excrements of musk duck, mallard and mute swan, the smallest one on excrements of roman-nosed goose, marsh harrier and cormorant. Such fungus species as Achlya americana, Aphanomyces laevis, Dictyuchus monosporus, Pythium debaryanum, Pythium rostratum, Saprolegnia asterophora, Saprolegnia ferax and Saprolegnia parasitica were detected on excrements of all birds examined. Out of these 36 species, 11 are known as parasites or necrotrophs of fish. Rhizophydium ampullaceum and Diasporangium jonesianum are reported for the first time from Poland.

Investigations on the Joint Occurrence ofAnabaena spiroidesKlebahn and Hyphomycetes in Various Types of Water Bodies

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NEW RECORDS AND SPECIES OF CALANOID COPEPODS FROM SASKATCHEWAN AND LOUISIANA

Diagnoses are given for three new species of the fresh-water calanoid copepod genus Diaptomus (subgenera Hesperodiaptomus and Aglaodiaptomus) from Saskatchewan and Louisiana. A check list of the calanoid copepods of Saskatchewan includes 23 species, of which 8 were previously reported in the literature, and 15 are new additions resulting from examination of collections from various types of water bodies.