scholarly journals Illustrated checklist of pea clams (Mollusca: Bivalvia: Sphaeriidae) from Nepal

1970 ◽  
Vol 3 (5) ◽  
pp. 57-65 ◽  
Author(s):  
Hasko Nesemann ◽  
Subodh Sharmap
Keyword(s):  
Water Quality ◽  
Life Span ◽  
Central Asia ◽  
Key Words ◽  
Indicator Species ◽  
High Abundance ◽  
Altitudinal Range ◽  
Long Life

The pea clams (Sphaeriidae) of Nepal are represented by 11 taxa. The highest diversity is found in the mid-altitudinal range between 795 and 1570 masl. Pea clams are poorly represented in the high Himalaya and the Terai. Faunal associations are with the Palaearctic and Oriental regions and with Central Asia. Most pea clams are useful indicator species and, owing to their high abundance and long life span, they are useful in monitoring the water quality of streams. Key words: Pisidium, Musculium, pea clam, indicator species, Sphaeriidae, Nepal Himalayan Journal of Sciences 3(5) 2005 p. 57-65

scholarly journals Lugares olvidados. Degradación ecológica y abandono institucional en la cuenca alta del río Mijares (Teruel) / / / \ \ \ Forgotten places. Ecological degradation and institutional abandonment in the upper basin of the Mijares river (Teruel)

2021 ◽  
pp. 442
Author(s):  
Aloma Riera Rodríguez ◽  
Luis Del Romero Renau ◽  
Míkel Pérez Pérez ◽  
María José Leiva González
Keyword(s):  
Water Quality ◽  
Rural Development ◽  
Key Words ◽  
Riparian Vegetation ◽  
Environmental Problem ◽  
Environmental Problems ◽  
Mediterranean Rivers ◽  
Palabras Clave ◽  
Del Rio

Resumen: La degradación de la calidad del agua y de la vegetación de ribera en los ríos mediterráneos es hoy en día un importante problema ambiental.  El río Mijares discurre por la provincia de Teruel desde su nacimiento en la Sierra de Gúdar -municipio de El Castellar-, a 1.500 metros de altura y forma impresionantes cañones y paisajes fluviales en este tramo alto de un gran valor ambiental. Sin embargo, en este trabajo se analiza de manera cualitativa la calidad de sus aguas y de la vegetación de ribera para mostrar que este gran recurso territorial para el desarrollo rural de la zona presenta unos niveles de contaminación preocupantes. Posteriormente se argumenta a la luz de los datos obtenidos, que las áreas en despoblación y con muy escasa presencia humana también presentan problemas ambientales que están relacionados con una presencia institucional muy débil en este tipo de territorios.   Palabras clave: cursos fluviales, problemas ambientales, despoblación, Teruel.   Abstract: The degradation of water quality and riparian vegetation in Mediterranean rivers is today a major environmental problem. The upper basin of the Mijares river flows through the province of Teruel from its source in the municipality of El Castellar at 1,500 meters high and forms some impressive canyons and river landscapes in this upper section of great environmental value. However, this research qualitatively analyzes the quality of its waters and the riverside vegetation to show that this great territorial resource for rural development in the area presents important levels of degradation. Subsequently, it is discussed in the light of the data obtained, that the areas in depopulation and with very little human presence also present environmental problems that are related to a very weak institutional presence in this type of territories.   Key words: rivers, environmental problems, depopulation, Teruel

scholarly journals Water Quality of Major Ponds of Comilla Town

1970 ◽  
Vol 45 (1) ◽  
pp. 57-62
Author(s):  
SZKM Shamsad ◽  
Md Didar-Ul-Alam ◽  
ASM Shamsuddoha ◽  
Mohammad Naushad Alam
Keyword(s):  
Water Quality ◽  
Community Health ◽  
Key Words ◽  
Water Samples ◽  
Chemical Constituents ◽  
Chemical Properties ◽  
Organic Wastes ◽  
Dry Period ◽  
Physico Chemical

Some important physico-chemical properties of water of major ponds of Comilla Town were studied to evaluate the water quality. Eight water samples were collected during the dry period (March 2005) from eight major ponds of Comilla Town (Ranir dighi, Mandir dighi, Nanuar dighi, Fauzdari dighi, Modina dighi, Dargabari dighi, Darma Sagar and Thakurpara). The result revealed that all the chemical constituents, except a few, are beyond the recommended limit for different uses. Higher value of pH (at Dargabari dighi, Darma Sagar dighi), OM (at Thakurpara dighi, Fauzdari dighi and Modina dighi), NH4+ concentration (at Ranir dighi, Mandir Dighi, Fauzdari dighi, Modina dighi and Dargabari dighi), and lower value of DO (at Fauzdari dighi and Modina dighi) may due to continuous disposal of kitchen wastes, organic wastes, sewage running and fall of twigs as well as extensive used for bathing, washing cloths and utensils etc. All indicate eutrophication and affect community health and hygiene and also create aesthetic problem in the locality. Key words: Ponds; Comilla District; Water quality Eutrophication DOI: 10.3329/bjsir.v45i1.5184 Bangladesh J. Sci. Ind. Res. 45(1), 57-62, 2010

Conceptual model of necessity of climacteric disorders of overcoming (Clinical lecture)

2018 ◽  
pp. 109-112
Author(s):  
Z. Dubossarskya ◽  
Keyword(s):  
Quality Of Life ◽  
Risk Factors ◽  
Life Span ◽  
Key Words ◽  
Conceptual Model ◽  
Cardiovascular Events ◽  
The Given ◽  
Clinical Lecture

Problems and prospects of extension of life of woman are discussed in the given article, taking into account that МHТ gives an opportunity of improvement of quality of life with realized of minimum risks at the observance of international and Ukrainian recommendations. Creation of conceptual model of overcoming of climacteric disorders and cardiovascular events on the basis of totality of risk factors will allow to the hormonotherapy to improve indexes and life-span of woman. Key words: quality of life, stopping HRT, menopause.

Spatial and seasonal variations in the water quality of the Amu Darya River (Central Asia)

2006 ◽  
Vol 40 (11) ◽  
pp. 2237-2245 ◽  
Author(s):  
G. Crosa ◽  
J. Froebrich ◽  
V. Nikolayenko ◽  
F. Stefani ◽  
P. Galli ◽  
...  
Keyword(s):  
Water Quality ◽  
Central Asia ◽  
Seasonal Variations ◽  
Amu Darya ◽  
Amu Darya River

scholarly journals Monitoring of water quality of the basin geosystem of the Poltva river

2013 ◽  
pp. 251-260
Author(s):  
L. Kurhanevych ◽  
M. Shipka
Keyword(s):  
Water Quality ◽  
Key Words ◽  
River Basin ◽  
Monitoring Network ◽  
Regional Monitoring ◽  
System Water ◽  
Basin System

The tasks of hydroecological monitoring of river-basin system have been justified. The analysis of the system of the monitoring studies in Poltva river basin has been made. The main problems in the functioning of the regional monitoring network have been determined. Key words: hydroecological monitoring, river-basin system, water quality.

Do abundance and percentage of dipteran larvae and Oligochaeta indicate low water quality in streams and lake littoral?

2019 ◽  
Vol 48 (4) ◽  
pp. 415-429
Author(s):  
Henn Timm ◽  
Marina Haldna
Keyword(s):  
Water Quality ◽  
High Water ◽  
High Abundance ◽  
Northern Europe ◽  
Freshwater Macroinvertebrates ◽  
Lowland Streams ◽  
Lake Littoral ◽  
Quality Of Water

Abstract The presence of chironomids and/or oligochaetes is generally considered to be an indication of poor status of freshwater. Non-chironomid dipterans show unclear trends. The abundance and percentage of these groups are rarely used as potential indicators. We attempted to determine whether these metrics reveal freshwater quality in lowland streams and lake littoral (Northern Europe, Baltic ecoregion, Estonia). The water quality was assessed based either on the water itself or on macroinvertebrates, fish, macrophytes, phytobenthos (in streams only) and/or phytoplankton (in lakes only). As expected, the high abundance and high percentage of chironomids and ceratopogonids indicated low quality of water in lakes. The high percentage of chironomids indicated low water quality also in streams. The high percentage of oligochaetes indicated low water quality in lakes. However, their high abundance (but not the percentage) was unexpectedly a symptom of high water quality in streams and to a lesser extent in lakes. In these cases, oligochaetes were represented by rheophilic, rather than saprophilic species. The abundance of simuliids (but not the percentage) and the richness of dipteran families indicated high water quality in streams. We suggest that the obtained results will allow better use of the indicative potential of freshwater macroinvertebrates.

scholarly journals WATER QUALITY ASSESSMENT OF LAR STREAM, KASHMIR USING MACRO INVERTEBRATES AS VARIABLE TOLERANTS TO DIVERSE LEVELS OF POLLUTION

2014 ◽  
Vol 20 ◽  
pp. 19-26
Author(s):  
Muzaffar A. Gaine ◽  
Amit Kumar Pal ◽  
Ashok Kumar Pandit
Keyword(s):  
Water Quality ◽  
Indicator Species ◽  
Water Quality Assessment ◽  
Tubifex Tubifex ◽  
Left Bank ◽  
Entire Study Period ◽  
Entire Study ◽  
Northern India ◽  
Pollution Indicator

The present study conducted on “Lar stream” which is one of the principal left bank tributaries of the river Jhelum in the Valley of Kashmir (northern India), was an attempt to assess the water quality of the canal by using macro invertebrates present in the ecosystem. During the present study, a total of 26 species of macro invertebrates were registered from Lar stream which belonged to the orders Diptera, Trichoptera, Hirudinae, Ephemeroptera, Plecoptera, Gastropoda, Coleoptera, Arachnida, Lepidoptera, Crustacea, and Oligochaeta. Among all the eleven orders, Dipterans registered a highest of 7 species (27%) and was the most dominant order. Then trend was followed by Trichoptera which registered a total of 5 species (19%) and was the second most dominating group. Similarly, Ephemeroptera, Oligochaeta, Hirudinae, Plecoptera and Gastropoda which registered 2 species (8%) each were the next dominating orders. The least representing taxa were Coleoptera, Arachnida, Lepidoptera and Crustacea which registered only one species (4%) each during the entire study period. The present study concludes that presence of some pollution indicator species such as Tubifex tubifex, Limnodrilus sp. (among Annelida), Chironomous sp., Tabanus sp. etc. (among Arhropoda), Lymnea sp. (among Mollusca) point the changing status of the stream from non-polluted to polluted.DOI: http://dx.doi.org/10.3126/eco.v20i0.11326EcoprintAn International Journal of EcologyVol. 20, 2013Page : 19-26

scholarly journals Estimation of quality of superficial waters of river Sаn basin

2009 ◽  
pp. 200-207
Author(s):  
T. Gurska
Keyword(s):  
Water Quality ◽  
Key Words ◽  
River Basin ◽  
Quality Monitoring ◽  
Coefficient Estimation

On the basis of generalization and systematization of the results of the regime observations made by the services of superficial waters quality monitoring has been made the ecological estimation of the water quality within Ukrainian part of river Sjan basin. Key words: river basin, limiting permissible concentration, pollution coefficient, estimation of waters quality.

scholarly journals Comparison of water quality of headwaters of Prut and Chornyy Cheremosh Rivers

2013 ◽  
pp. 144-152
Author(s):  
Yaroslaw Ilchyshyn
Keyword(s):  
Water Quality ◽  
Key Words ◽  
Quality Monitoring ◽  
Mountain Streams ◽  
Benthic Organisms ◽  
Water Quality Trends ◽  
Comprehensive Study

The work is devoted to investigation of water quality using bioindicators benthic organisms. Methods of bioindicators in researches of headwaters of Prut and Chornyy Cheremosh Rivers were proved and tested. Comprehensive study of water quality of mountain streams was conducted for five years. Changes in water quality, trends and the reasons for their occurrence were revealed during the analysis. Based on these results recommendations for improving of geoecological situation in the rivers basin were developed. Key words: water quality, bioindication, geoecology, indices of quality, monitoring, pollution.

scholarly journals Thermocyclops decipiens (Kiefer, 1929) (Copepoda, Cyclopoida) as indicator of water quality in the State of Minas Gerais, Brazil

2007 ◽  
Vol 50 (4) ◽  
pp. 695-705 ◽  
Author(s):  
Giovanni Guimarães Landa ◽  
Francisco Antonio Rodrigues Barbosa ◽  
Arnola Cecilia Rietzler ◽  
Paulina Maria Maia-Barbosa
Keyword(s):  
Water Quality ◽  
Indicator Species ◽  
Water Quality Index ◽  
Aquatic Ecosystems ◽  
Quality Index ◽  
Minas Gerais ◽  
The State ◽  
Copepoda Cyclopoida

The aim of this work was to study the possible utilization of Thermocyclops decipiens as indicator of the trophic degree and water quality of some watersheds of the state of Minas Gerais. From the beginning of the decade of 90, T. decipiens was recorded in several water collections of the state, including the basins of the rivers Paranaíba, São Francisco, Doce and Grande, within environments mainly of meso and eutrophics characteristics. Of the 28 places of occurrence of the species and according to the water quality index (WQI) used by Environmental Foundation of Minas Gerais (FEAM), 7 of these environments presented WQI good, 16 medium, 4 bad and one very bad. This classification corroborated the hypothesis that T. decipiens could be used as indicator species of eutrophic environments and of low water quality thus constituting an important tool for the biomonitoring of aquatic ecosystems.

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