scholarly journals The status and seasonality in the physico-chemical hydrology of a Nigerian rainforest pond.

1991 ◽  
Vol 52 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Richard P. KING ◽  
Nathaniel A. NKANTA
Keyword(s):  
Physico Chemical ◽  
The Status

scholarly journals The chemicals (formaldehyde and toluene) influence on soil microorganisms of leached chernozem

2016 ◽  
Vol 5 (3) ◽  
pp. 21-25
Author(s):  
Natalya Anatolyevna Ilyina ◽  
Tatyana Valentinovna Fufaeva ◽  
Natalya Anatolyevna Kazakova ◽  
Nataliya Mikhailovna Kasatkina ◽  
Evgeniya Alexandrovna Vilkova
Keyword(s):  
Soil Microorganisms ◽  
Heterotrophic Bacteria ◽  
Soil Formation ◽  
Chemical Production ◽  
Leached Chernozem ◽  
Physico Chemical ◽  
Production And Consumption ◽  
The Status ◽  
Number Of Microorganisms ◽  
Bacteria And Fungi

The paper assesses the status of the soil cover associated with the pollution of its waste chemical production and consumption. The authors present the data of formaldehyde and toluene influence on the abundance of actinomycetes, heterotrophic bacteria and fungi, as these groups of microorganisms provide self-purification capacity of the soil and participate in soil formation processes. In this paper microbiological and physico-chemical methods of research are used. The study of species composition changes of some soil microorganisms groups of leached chernozem under the influence of formaldehyde and toluene showed that this factor causes changes in the complex of soil microorganisms. This factor is reflected in the decreased species richness and diversity and increase of pollution-tolerant microorganisms. These studies investigate a number of microorganisms that provide self-purification capacity of the soil and participate in soil formation. The results show the nature of the influence of different doses of formaldehyde and toluene on the structure and functioning of the complex of soil microorganisms, as well as reveal the mechanism of action of chemicals (formaldehyde and toluene) on soil microbiota associated with its resistance and the manifestation of toxicity of the soil.

scholarly journals An environmental database for the status of freshwater in Greece

2013 ◽  
Vol 4 (1) ◽  
pp. 1-14
Keyword(s):  
National Level ◽  
Reference Conditions ◽  
Ecological Status ◽  
Anthropogenic Pressures ◽  
Environmental Pressures ◽  
Physico Chemical ◽  
Other Information ◽  
The Status ◽  
Freshwater Bodies ◽  
Status Data

An environmental database has been created, recording water bodies at a national level and assembling relevant data collected by various public services and institutions in charge of water resources management and research in Greece. Data consists of physico-chemical parameters, geomorphological descriptions, inventories of fauna and flora species, environmental pressures, vulnerability evaluation and other information useful for the assessment of current and future ecological status. Data gathering has proven to be a challenging task, due to the large number and the generally small size of the surface freshwater bodies as well as the numerous competent services and institutions and the multiple and sometimes conflicting responsibilities that therefore result. The latter is also partly the cause of lack of continuity of data, gaps or sometimes questionable reliability. Performing a global data overview, we note that (a) ecological status can be characterized as good for the majority of the sites, especially for small mountain streams, and (b) the general trend in most cases is degradation of current conditions, related either to anthropogenic pressures or to human activity combined with natural factors. This database, in a more completed and enriched form, could assist in the implementation of 2000/60/EC Directive in Greece and the establishment of reference conditions of surface freshwater systems.

scholarly journals Microbiological and Physico-Chemical Parameters of the Danube River (Romanian–Bulgarian Sector) with Ichthyofaunal Diversity

2021 ◽  
Author(s):  
Mădălina-Andreea Ivan ◽  
Carmen Curuțiu ◽  
Nicolai Craciun ◽  
Valentin Jujea ◽  
Cristian-Emilian Pop
Keyword(s):  
Point Sources ◽  
Danube River ◽  
Current Status ◽  
Water Stream ◽  
The Danube River ◽  
Pollution Levels ◽  
Physico Chemical ◽  
The Status ◽  
Point And Diffuse Sources ◽  
Agricultural Areas

Water and water habitats are essential to life and to the wellness of the communities that rely on them, as the Danube river is subject to human impact and vice versa, periodic surveys are required to determine the status of its pollution levels. In this work we used known microbiological indicators as well as physico-chemical ones to assess the ecotoxicological status of the Danube river from eleven locations partially forming the “Romanian–Bulgarian Danube Sector”. Most of the microbial communities found, and their densities, could be explained by point and diffuse sources scattered along the sector such as discharged household and farm wastewater, as well as nearby agricultural areas where fertilizers have been used and then leaked in the water stream during rainfalls. However, microbial data on non-point sources that lead to diffuse pollution of surface waters could be linked to such parameters and furthermore shown a slight correlation with the current status of fish communities.

scholarly journals Imbabura and Chimborazo at the cradle of Biogeography in the South American Andes

2020 ◽  
Vol 4 (5) ◽  
pp. 188-196
Author(s):  
Alberto Gomez Gutierrez
Keyword(s):  
Environmental Variables ◽  
South American ◽  
Total Zooplankton ◽  
Present Contribution ◽  
Freshwater Zooplankton ◽  
Physico Chemical ◽  
Rivers And Streams ◽  
The Status ◽  
Freshwater Habitats ◽  
Lentic Waters

The present contribution is a comprehensive review of the status of biodiversity of freshwater zooplankton of Uttarakhand Himalaya. Uttarakhand harbours a wide diversity in freshwater habitats in terms of rapids, riffles, runs, cascades of falls and pools of rivers and streams and the shallow and swift water of springs and lentic waters of lakes, ponds and reservoirs with varied physico-chemical environmental variables. Freshwater zooplankton of Uttarakhand are composed of the taxa of Protozoa, Rotifera, Copepoda, Cladocera and Ostrocoda. Ritifera contributes maximum (40.50%) with thirty two species followed by Protozoa (22.78%) with eighteen species and Cladocera (22.78%) with eighteen species to the total zooplankton taxa of Uttarakhand. Copepoda contributes 8.86% with seven species, while minimum contribution (5.08%) with only four species is made by Ostracoda to the total zooplankton taxa of Uttarakhand. Seasonal variation in the abundance of zooplankton in addition to diurnal vertical migration in diverse freshwater habitats of Uttarakhand Himalayahas also been reported.

scholarly journals Periphyton Response Analysis to the Pollution in Seagrass Ecosystem Panjang Island, Banten

2018 ◽  
Vol 23 (3) ◽  
pp. 113
Author(s):  
Yayuk Sugianti ◽  
Barti Setiani Muntalif ◽  
Priana Sudjono
Keyword(s):  
Water Quality Assessment ◽  
Organic Pollution ◽  
Inorganic Materials ◽  
Response Analysis ◽  
Physico Chemical ◽  
The Status ◽  
Standard Quality ◽  
Seagrass Ecosystems ◽  
Chemical Conditions ◽  
Physical And Chemical

Increases in coastal pollutants, largely due to human activity on land, have an impact on seagrass ecosystems. The high sedimentation in the waters causes an increase in the concentration of sludge, organic matter, nutrients, and turbidity which reduce the depth that can be reached by sunlight. The condition affects seagrass ecosystems adversely. Changes in water condition can be illustrated by the presence of water organisms. One dominant organism in seagrass ecosystems is periphyton. The existence of periphyton in the waters is determined by physical and chemical conditions of the waters because it has specific limit of tolerance, which causes different community structure. To analyze periphyton response to the changes of environmental quality in seagrass ecosystems, Shannon Winner diversity and Saprobic Indices were measured at Panjang Island, Banten. The results of water quality assessment indicates the status of aquatic seagrass of the island considered as polluted to heavy polluted. It is observed from some physico-chemical parameters that exceeded the standard quality for the life of seagrass ecosystems and marine life. Based on the classification and saprobic coefficient using periphyton biological parameters, the condition of seagrass land ecosystem in the island is classified into β Mesosaprobic to β/α Mesosaprobic phase, which indicates light to medium pollution with pollutants including organic and inorganic materials. Several types of dominant periphyton were discovered during the observations, including Meridion sp, Navicula sp, Nitzschia sp and Synedra sp. This periphyton species belong to Bacillariophyceae class (Family Chrysophyta) that is commonly used to assess the condition of eutrophication and organic pollution on waters.

scholarly journals Analisis Besi dalam Ekosistem Lamun dan Hubungannya dengan Sifat Fisikokimia Perairan Pantai Kabupaten Donggala

2012 ◽  
Vol 13 (2) ◽  
pp. 105 ◽  
Author(s):  
Tahril Tahril ◽  
Paulina Taba ◽  
Nursiah La Nafie ◽  
Alfian Noor
Keyword(s):  
Statistical Tests ◽  
Coastal Region ◽  
Sampling Technique ◽  
Limiting Factor ◽  
Seagrass Ecosystem ◽  
Physico Chemical ◽  
The Status ◽  
Territorial Water ◽  
Positive Effect

The objectives of the study are to describe the iron content of seagrass area ecosystem and its relation with nature of physico-chemical territorial water. The sampling of seagrass was conducted in purposive sampling technique for every status of the field and performed in three spots of the seagrass ecosystem region with reference to the depth of water and the current direction. Based on statistical tests of factorial and variance analysis indicate that the quality of physico-chemical territorial water in the coastal region of Donggala regency still very good, relatively. The result also showed, The Demand Oxygen and the turbidity gave a positive effect to Fe- seagrass improvement in its various association. Besides, the limiting factor for the low of Fe-seagrass is the height of salinity and water temperature. If the results were combined with another micro and macro mineral analysis will to become the basic for estimating the status of seagrass fertility.

scholarly journals Study of Limnological Status of Two Selected Floodplain Wetlands of West Bengal

2021 ◽  
Author(s):  
Golam Ziauddin
Keyword(s):  
Dissolved Oxygen ◽  
Physicochemical Parameters ◽  
West Bengal ◽  
Winter Season ◽  
Trophic Levels ◽  
Healthy Population ◽  
Floodplain Wetlands ◽  
Secchi Disc ◽  
Physico Chemical ◽  
The Status

Abstract Limnology is the study of all aquatic systems, both lentic and lotic fresh, fresh, and saline including lakes, wetlands, marshes, bogs, ponds, reservoirs, streams, rivers, oceans, etc. about their physical, chemical, and biological characteristics. Among this phytoplankton, Zooplankton, periphyton, benthos are a minute aquatic free-floating microscopic organism, which acts as a larger food source of larval and higher vertebrates and invertebrates including carnivorous and omnivorous fishes. They are related to the growth of juvenile fishes and are also play important role in the transfer of energy from the primary phytoplankton to higher trophic levels. The plankton community fluctuates according to the physicochemical parameters and the relative environment of the water body especially the Rotifers as they are known to change immediately along with the change in water quality . Realizing the importance of floodplain wetlands and the paucity of literature on the limnology of this ecosystem present investigation was carried out in two floodplain wetlands having characteristics of open (Kole beel, an ox-bow lake formed near Somra Bazar in Hooghly district), and closed beel Suguna beel situated in Nadia District of West Bengal) system during the period 2011–2013. The physicochemical parameters of the investigated beels' water and soil were, for the most part, favorable for planktonic development. It has an alkaline pH of 7.5–8.4 and is alkaline. The dissolved oxygen content and Secchi Disc transparency values indicate that the water is in excellent condition. The water was moderately hard, with only trace amounts of nutrients present. Seasonal fluctuations in the water column were apparent, and they were mainly attributable to replenished supplies and volume. The plankton population of the studied ecosystem was made up of a mixed and healthy population of diverse fauna. The greatest diversity was observed during the winter season, when favorable temperature, dissolved oxygen, and other physicochemical parameters of water, as well as optimal solar penetration, coincided. In a closed system (Suguna), the richness of planktonic structure resulted in higher fish production (1570.05 kg/ha/yr) than in an open system (Kole) (384.4 kg/ha/yr). The status of floodplain wetlands was determined to be eutrophic based on various Physico-chemical and biological parameters.

scholarly journals Effect of 2014 massive flood on well water qualities: A case study on Kelantan River basin, Malaysia

2018 ◽  
Vol 38 (1) ◽  
pp. 127-136 ◽  
Author(s):  
Hariz A. Ab. Rahman ◽  
Noor A. Ibrahim ◽  
Azzmer A. Abdul Hamid ◽  
Tengku H.T. Abdul Hamid
Keyword(s):  
River Basin ◽  
Microbial Contamination ◽  
Geographical Location ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
The Status ◽  
Kelantan River Basin ◽  
Flood Period ◽  
Total Dissolved Solid

AbstractThe effect of physical and biological qualities of wells after submergence was assessed following December 2014 flood in Kelantan. Studies were carried out on a total of 65 wells from 13 stations around Kelantan River basin in which the wells’ water were sampled for pH, total dissolved solid (TDS), turbidity and microbial contamination. About 95% of the well showed to be contaminated, 7 out of 65 samples (11.1%) showed TDS values >400 μS·cm−1; and 19 samples (29.2%) recorded turbidity beyond 7.0 NTU. Statistical non-parametric tests carried out on independent groups showed that the status of well contamination was neither determined by both degree of submergence nor by the geographical location. Also the physico-chemical parameters are independent of flood inundation. However, TDS and turbidity values changed based on geographical location, at p < 0.05. Well from estuary recorded higher TDS (241.2 μS·cm−1 ±159.5 SD) and turbidity (8.04 NTU ± 6.53 SD) compared to those from inner basin (TDS at 156.3 μS·cm−1± 88.9 SD; turbidity at 2.90 NTU ± 2.46 SD), respectively. The flood water had played significant role in the transmission of existing contaminant, and most of the wells were unsafe for drinking. We concluded that the degree of flood submergence does not necessarily determine the severity of the well contamination in Kelantan, but the existing contamination may exacerbate further the potential risk during post flood period.

scholarly journals Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco System (Northern Patagonia, Argentina)

2015 ◽  
Vol 105 (3) ◽  
pp. 348-358 ◽  
Author(s):  
Melina Mauad ◽  
M. Laura Miserendino ◽  
Miguel A. Risso ◽  
Julieta Massaferro
Keyword(s):  
Diversity Index ◽  
River Mouth ◽  
Species Assemblages ◽  
Functional Feeding Groups ◽  
Physico Chemical ◽  
The Status ◽  
Macroinvertebrate Metrics ◽  
San Carlos ◽  
Nahuel Huapi National Park ◽  
Different Levels

ABSTRACT Seven sites were examined in the Challhuaco-Ñireco system, located in the reserve of the Nahuel Huapi National Park, however part of the catchment is urbanized, being San Carlos de Bariloche (150,000 inhabitants) placed in the lower part of the basin. Physico-chemical variables were measured and benthic macroinvertebrates were collected during three consecutive years at seven sites from the headwater to the river outlet. Sites near the source of the river were characterised by Plecoptera, Ephemeroptera, Trichoptera and Diptera, whereas sites close to the river mouth were dominated by Diptera, Oligochaeta and Mollusca. Regarding functional feeding groups, collector-gatherers were dominant at all sites and this pattern was consistent among years. Ordination Analysis (RDA) revealed that species assemblages distribution responded to the climatic and topographic gradient (temperature and elevation), but also were associated with variables related to human impact (conductivity, nitrate and phosphate contents). Species assemblages at headwaters were mostly represented by sensitive insects, whereas tolerant taxa such as Tubificidae, Lumbriculidae, Chironomidae and crustacean Aegla sp. were dominant at urbanised sites. Regarding macroinvertebrate metrics employed, total richness, EPT taxa, Shannon diversity index and Biotic Monitoring Patagonian Stream index resulted fairly consistent and evidenced different levels of disturbances at the stream, meaning that this measures are suitable for evaluation of the status of Patagonian mountain streams.

scholarly journals Assessment of physico-chemical parameters of surface water quality of Taudaha lake of Kathmandu and their comparison with other global published values

BIBECHANA ◽  
2012 ◽  
Vol 9 ◽  
pp. 141-150 ◽  
Author(s):  
Achut Ram Pradhananga ◽  
Ramesh Kaji Shakya ◽  
Pawan Raj Shakya
Keyword(s):  
Water Quality ◽  
Lake Water ◽  
Monsoon Season ◽  
Surface Water Quality ◽  
Total Alkalinity ◽  
Total Hardness ◽  
Chemical Parameters ◽  
Quality Guidelines ◽  
Physico Chemical ◽  
The Status

The aim of current study was to evaluate the status of Taudaha lake water with respect to different physico-chemical parameters (pH, electrical conductivity, dissolved oxygen, free CO2, total dissolved solids (TDS), total suspended solids (TSS), total solids (TS), total alkalinity, total hardness, chloride, nitrate, sulphate, phosphate, sodium, calcium, magnesium, lead, cadmium, copper and zinc) in monsoon season 2012. Results reveal that almost all the physico-chemical parameters including the elemental investigation of the lake water have values within the range of the maximum permissible levels for drinking water. The results were compared with WHO water quality guidelines as well as with literature values reported for global lake water. DOI: http://dx.doi.org/10.3126/bibechana.v9i0.7189 BIBECHANA 9 (2013) 141-150

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