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 Identifikasi lingkungan perairan untuk budi daya karang hias di desa Arakan Kabupaten Minahasa Selatan

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Indri S Manembu ◽  
Edwin L.A Ngangi
Keyword(s):  
Water Quality ◽  
Sea Water ◽  
Marine Biota ◽  
Matching Method ◽  
Physical Conditions ◽  
Bottom Substrate ◽  
Standard Quality ◽  
Chemical Conditions ◽  
Physical And Chemical ◽  
Descriptive Method

This research aimed to gather data and information as well as to evaluate the waters condition and water quality suitable for ornamental coral aquaculture, so the characteristic of Arakan waters for ornamental coral aquaculture could be examined.  The research applied Explorative Descriptive method with Purposive Sampling.  Research stations were established at 20 points representing the overall ecosystem of Arakan waters.  Data collected  consisted of physical conditions (bottom substrate, flow rate, turbidity, water depth, salinity, temperature, TSS) and  chemical conditions (pH, DO, nitrate, phosphate). Data were analyzed using Matching Method by matching the data obtained from sea water standard quality table for marine biota in accordance to Kep.Men. LH No. 51/2004 and data from Hutabarat and Evans (1984).  Based on physical and chemical conditions, Arakan waters was suitable for ornamental coral aquaculture or categorized as suitable. However, water temperature at the time of measurement was not proper,  thus monitoring of this parameter for longer period was required. Keywords: Arakan Village, ornamental coral, water quality, waters condition,  matching                      method

scholarly journals Some aspects of the ecology of freshwater algae in the Densu River and two tributaries in Southern Ghana

2014 ◽  
Vol 3 (2) ◽  
pp. 246-257 ◽  
Author(s):  
Ted Y Annang ◽  
RD Yirenya-Tawiah ◽  
GC Clerk ◽  
Thomas Smith
Keyword(s):  
River Water ◽  
Sampling Site ◽  
Freshwater Algae ◽  
Sample Collection ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Physical And Chemical Parameters ◽  
Chemical Conditions ◽  
Physical And Chemical ◽  
Southern Ghana

Studies on the composition and abundance of the phytoplankton in River Densu and two of its tributaries, Rivers Adeiso and Nsakir were carried out at ten sampling sites, including seven from different regions of the river basin namely Afuaman, Akwadum, Densuso, Manhean, Machigeni, Nsawam and Weija, as well as Adeisoand Pokuase. Sampling was done monthly at each sampling site from January to December, 2006. Physical and chemical parameters of river water were studied. The parameters of the river water varied with the sampling sites and the time of the year. Water samples for phytoplankton identification and enumeration were collected at each sampling site. Physico-chemical conditions of the river were assessed during sample collection or in the laboratory. Correlation analysis showed that there was a positive correlation between algal genera and the measured physical and chemical parameters of the river water. DOI: http://dx.doi.org/10.3126/ije.v3i2.10637 International Journal of the Environment Vol.3(2) 2014: 246-257

scholarly journals The Volatile Composition of Comets

1989 ◽  
Vol 8 ◽  
pp. 387-393 ◽  
Author(s):  
H. A. Weaver
Keyword(s):  
Molecular Data ◽  
Detailed Knowledge ◽  
Volatile Composition ◽  
Cometary Nuclei ◽  
The Status ◽  
Chemical Conditions ◽  
The Many ◽  
Physical And Chemical ◽  
Cometary Comae ◽  
Excitation Conditions

ABSTRACTComets may be our best probes of the physical and chemical conditions in the outer regions of the solar nebula during that crucial period when the planets formed. The volatile composition of cometary nuclei, in particular, can be used to decide whether comets are the product of a condensation sequence similar to that invoked to explain the compositions of the planets and asteroids, or if comets are simply agglomerations of interstellar grains which have been insignificantly modified by the events that shaped the other bodies in the solar system. Although cometary nuclei are not generally accessible to observation, observations of cometary comae can illuminate at least some of the mysteries of the nuclei provided one has a detailed knowledge of the excitation conditions in the coma and also has access to basic atomic and molecular data on the many species present in comets. This paper examines the status of our knowledge of the volatile composition of cometary nuclei and discusses how these data are obtained.

scholarly journals WATER QUALITY ASSESSMENT OF PUNASA DAM (INDIRA SAGAR DAM), MADHYA PRADESH

2021 ◽  
Vol 9 (02) ◽  
pp. 501-508
Author(s):  
Heena Saraswat ◽  
◽  
Meenakshi Solanki ◽  
Keyword(s):  
Water Quality ◽  
Chemical Properties ◽  
Oxygen Demand ◽  
Water Quality Assessment ◽  
Madhya Pradesh ◽  
Phosphorus Concentration ◽  
Quality Guidelines ◽  
The Status ◽  
One Year ◽  
Physical And Chemical

The Indirasagar Dam (Punasa Dam) is a multipurpose key project of Madhya Pradesh on the Narmada river at Narmada Nagar in Khandwa (Tehsil of West Nimar district) Madhya Pradesh in India.The physical and chemical properties of water including temperature, pH, transparency, dissolved oxygen, biological oxygen demand, hardness, nitrate, calcium and phosphorus concentration, were monitored from October 2018 to September 2019. The physical and chemical parameters were analyzed as per APHA, revealed that there were fewer variations in the physicochemical parameters and results received through the entire one year of study showed that the status of water quality is quite normal and within the permissible limit as mentioned with ISI.Moreover, according to the findings of this research and their comparison with the national and international water quality guidelines/standards, it could be said that the water quality of Punasa dam during the study period was acceptable. However, due to the changes occurred in nitrate and phosphorus and extensive development of eutrophication problem, accurate and continuous evaluation of water quality in this reservoir is deemed necessary.

scholarly journals Physico-chemical conditions of existence of early Cambrian chemotrophic microbiota in zone of influence of ore-forming hydrothermal solutions

2019 ◽  
Vol 486 (3) ◽  
pp. 331-335
Author(s):  
V. A. Simonov ◽  
A. A. Terleev ◽  
A. V. Kotlyarov ◽  
D. A. Tokarev ◽  
A. V. Kanygin
Keyword(s):  
Low Temperature ◽  
Hydrothermal Systems ◽  
Early Cambrian ◽  
Hydrothermal Solutions ◽  
Ore Body ◽  
Physico Chemical ◽  
Zone Of Influence ◽  
Chemical Conditions ◽  
Physical And Chemical ◽  
Operating Zone

Complex researches of the pyrite Early Cambrian Kyzyl-Tashtyg deposit (East Tuva) have allowed to reconstruct paleohydrothermal systems, to find out physical and chemical conditions of hydrothermal processes, and also to establish features of existence of ancient hydrothermal biota in the operating zone of the solutions, participating at all stages of formation of ore-bearing structures, since influence of postmagmatic fluids and finishing low temperature hydrotherms. The representative data on biota has been received at studying of the objects, which were in a zone of influence of rather low temperature hydrothermal systems. In one cases findings of microorganisms are dated for basalt complexes, containing ore body, and in other cases the found fauna is connected with ferruginous-siliceous sediments. It has been found out that microorganisms in the tonsil cavities of basalts evolved at the temperatures nearby 110-140°С under the influence of hydrothermal solutions. Much lower temperatures (to 100 °С) existed at development of micro-fossils in the quartz-hematite hydrothermal constructions of Kyzyl-Tashtyg deposit.

scholarly journals Spatial and temporal heterogeneity in a subtropical reservoir and their effects over the benthic macroinvertebrate community

2014 ◽  
Vol 26 (3) ◽  
pp. 306-317 ◽  
Author(s):  
Frederico Guilherme de Souza Beghelli ◽  
André Cordeiro Alves dos Santos ◽  
Maria Virgínia Urso-Guimarães ◽  
Maria do Carmo Calijuri
Keyword(s):  
Organic Pollution ◽  
Taxonomic Composition ◽  
Benthic Macroinvertebrate ◽  
Macroinvertebrate Communities ◽  
Littoral Region ◽  
Longitudinal Gradients ◽  
Spatial And Temporal Heterogeneity ◽  
Sources Of Variation ◽  
Chemical Conditions ◽  
Physical And Chemical

AIM: The objective of the present study was to demonstrate the influences of the environment spatial heterogeneity on benthic macroinvertebrates considering transverse and longitudinal gradients as also seasonality. METHODS: Four samplings were performed: two in the wet and two in the dry season in the riverine, transitional and lacustrine zones in the littoral and profundal regions of Itupararanga reservoir, SP, Brazil. Abiotic characterization of the water and of the sediment was performed. The biotic characterization was based on richness, dominance, diversity, and density of organisms, as well as on the relative abundance of predominant taxa. Two-way ANOSIM analyses were performed for both biotic and abiotic components, in order to test the significance of the differences in the longitudinal and transverse directions as well as of the differences between seasons. RESULTS: Compartmentalization was present in both directions, longitudinal and transverse. In a general way, the littoral region presented higher diversity values when compared with the profundal region, and the riverine zone presented high densities and high percentage of taxons, which usually indicate organic pollution. The differentiation between the transitional and lacustrine zones was determined mainly by taxonomic composition. Seasonality was also observed and the transportation of small particles, the entrance of nutrients, and the presence of macrophytes were considered as determinants for differentiation. CONCLUSIONS: Together, these results demonstrate the responses of benthic macroinvertebrate communities considering distinct sources of variation: longitudinal heterogeneity, determined by the increasing distance from the forming rivers that leads to a gradient of physical and chemical conditions; transverse heterogeneity, determined by the proximity with the land environment and depth differences. Seasonal heterogeneity was recorded during the period of this research and it was determined by variations in water flow, in temperature, and in the carrying of matter, nutrients and organisms.

scholarly journals Biodiversity and seasonal distribution of benthic diatom assemblages as an indicator of water quality of small karstic river in Bosnia and Herzegovina

2021 ◽  
Vol 80 (2) ◽  
Author(s):  
Anita Dedić ◽  
Dubravka Hafner ◽  
Ana Antunović ◽  
Jasmina Kamberović ◽  
Svjetlana Stanić-Koštroman ◽  
...  
Keyword(s):  
Bosnia And Herzegovina ◽  
Ecological Status ◽  
Quantitative Composition ◽  
Diatom Indices ◽  
Low Concentrations ◽  
Physico Chemical ◽  
Status Assessment ◽  
Chemical Conditions ◽  
Physical And Chemical

The aims of this paper were to describe seasonal changes in the qualitative and quantitative composition of diatom taxa and the potential application of benthic diatoms for ecological status evaluation. Diatom indices (IPS and TI) were calculated from data from three different locations along a longitudinal profile of the Bunica, a small karstic river in Bosnia and Herzegovina. A total of 147 taxa were recorded in 12 samples. The most common taxa were Meridion circulare (Greville) C.Agardh and Ulnaria ulna (Nitzsch) Compère. Physical and chemical analyses showed low concentrations of nutrients, good oxygenation, typical pH for carbonate bed/origin and generally oligotrophic conditions and high ecological status. All sites had similar physico-chemical conditions and there were only few seasonal differences. Ordination of the diatom data showed that samples showed neither longitudinal nor seasonal patterns. Median value for IPS (16.8) and for TI (7.3) can be possible ‘‘expected’’ values for ecological status assessment for small karstic rivers in the Mediterranean region. We propose the use of the phytobenthos Intercalibration Common Metric (pICM - an index that combines the IPS and TI) as a national metric for countries developing WFD diatom methods at a late stage. One situation is described, and a solution, which is potentially transferable to other locations in Bosnia and Herzegovina and also to other countries facing similar challenges.

Physical and chemical conditions for longterm functioning of restorations with zirconium-based framework: literature review

2019 ◽  
Vol 1 (5) ◽  
pp. 48-51
Author(s):  
Z. S. Khabadze ◽  
G. K. Davreshyan ◽  
M. S. Terekhov ◽  
Yu. A. Bakaev ◽  
S. M. Abdulkerimova ◽  
...  
Keyword(s):  
Literature Review ◽  
Zirconium Dioxide ◽  
Heating And Cooling ◽  
Physico Chemical ◽  
Oral Environment ◽  
Chemical Conditions ◽  
Physical And Chemical ◽  
Google Search ◽  
Selection Of

The aim of the study is to determine the optimal physico-chemical conditions and factors for the long-term perspective of zirconia-based restorations. Materials and methods Information was searched in English without time limits in the PubMed electronic database, a Google search and literature lists of relevant studies and reviews. Full-text articles from 2003 to 2018 were selected, in which studies of frameworks made of zirconium dioxide, a protocol for changing firing temperatures, and a description of the structure are described. Results. Totally 79 articles were identified. After the selection of articles on the inclusion criteria and removal of duplicate articles, the total number was 5. The review of the literature included studies of 3 types of zirconium: 3Y-TZP, ATZ, 12Ce-TZP. In a number of studies, the authors studied experimentally the influence of the oral environment on the long-term functioning of zirconium, and a number of authors conducted a study on the effect of heating and cooling gradients, as well as mechanical processing of zirconium frameworks. Conclusion. This literature review has shown the optimal physicochemical conditions and factors for the long-term prospects for restorations with a zirconia-based framework, starting from its composition, technical and laboratory stages, and pumping over the oral cavity factors. The combination of these factors can reduce the effect of the transition of zirconium dioxide from the tetragonal to the monoclinic phase, as well as reduce the stress outcomes resulting from the processing of zirconia frameworks and their facing layer.

scholarly journals Water Quality Assessment of district Bagh(Tehsil Dhirkot) Azad Jammu and Kashmir using multivariate statistical methods

2020 ◽  
Vol 9 (02) ◽  
Author(s):  
Madiha Madiha Kanwal
Keyword(s):  
Urban Areas ◽  
Water Quality Assessment ◽  
World Health ◽  
High Concentration ◽  
Multivariate Statistical ◽  
Jammu And Kashmir ◽  
Physico Chemical ◽  
Calcium Magnesium ◽  
Health Organization ◽  
Physical And Chemical

The present study is conducted to identify the physical and chemical characteristics of District Bagh, Azad Jammu and Kashmir surface water. Fifteen locations were selected from study area to collect the water samples. The various physico-chemical parameters of water tested are pH,Temperature, Total dissolved solids (TDS), Sodium, Potassium, Sulphate, Nitrate, Calcium, Magnesium and Bicarbonates. The heavy metals including Cr, Cu, and Cl are also the part of our current research on the basis on the outcome of previous studies conducted in the urban areas of Azad Jammu and Kashmir. The final results concluded that bicarbonate was present in high concentration in all samples whereas the other parameters were in the compliance of prescribed World Health Organization standards. Furthermore, Cluster analysis and Principal Analysis were performed which shows similar results and effects of bicarbonates and hardness of water as major contributor of altering the concentration of other variables.

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