Effects of Urbanization on Stream Ecosystems

2005 ◽  
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Biological Indicators ◽  
Taxonomic Composition ◽  
The State ◽  
Aquatic Biodiversity ◽  
Urban Sewage ◽  
Rehabilitation Potential ◽  
State Capital ◽  
Belo Horizonte

<em>Abstract.</em>—In Brazil, most urban sewage is discharged without treatment into rivers. This is the situation for the Rio das Velhas, which receives in its upper course the sewage of the state capital of Minas Gerais, Belo Horizonte, with more than 2.4 million inhabitants. Our study focuses on the effects of basin urbanization on aquatic biodiversity and water quality in the Rio das Velhas. We use the assemblage structure and taxonomic composition of fishes and benthic macroinvertebrates as biological indicators of water quality. Effects of Belo Horizonte’s discharge included changes in water quality and declines in fish and benthos richness and diversity. However, the absence of dams in the Rio das Velhas main course, associated with connectivity with the Rio São Francisco system and tributaries in excellent condition, increase its rehabilitation potential.

scholarly journals Biodiversity of benthic macroinvertebrates in Sungai Kisap, Langkawi, Kedah, Malaysia

2021 ◽  
Vol 6 (1) ◽  
pp. 36-40
Author(s):  
S. Nurhafizah-Azwa ◽  
A.K. Ahmad
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Diversity Index ◽  
Strong Relationship ◽  
Biological Indicators ◽  
Diversity Indices ◽  
Average Value ◽  
Evenness Index ◽  
Moderate Condition ◽  
Richness Index

A study on macroinvertebrate diversity was conducted in Sungai Kisap, Langkawi, Kedah. Five stations were selected with a distance of approximately 500 metres apart with three replications of benthos and two replications of water sample. The results classified Sungai Kisap in Class I, which indicates very good water quality based on WQI recommended by the Department of Environment. A total of 2 phyla, 3 classes, 8 orders, 29 families, and 3564 individuals were successfully sampled and recorded. The presence of Hydropsychidae, Baetidae, and Chironomidae with a high abundance of the families show the potential to be used as biological indicators of a clean ecosystem. The analysis showed that the average value of Shannon Diversity Index, H’ (1.28), Pielou Evenness Index, J’ (0.45), and Margaleff Richness Index, DMG (2.80) indicates that Sungai Kisap is in moderate condition and the distribution of macroinvertebrates is uniform between stations. The correlation test showed that the WQI has a strong relationship with the diversity indices involved. BMWP, ASPT, and FBI showed that Sungai Kisap has good water quality.

GEOSPATIAL ANALYSIS OF STORMWATER PONDS AND WATER QUALITY ACROSS THE STATE OF FLORIDA

2019 ◽  
Author(s):  
Trista M. Brophy ◽  
◽  
Steven P. Hohman ◽  
A.J. Reisinger ◽  
Eban Z. Bean ◽  
...  
Keyword(s):  
Water Quality ◽  
Geospatial Analysis ◽  
The State ◽  
Stormwater Ponds

scholarly journals Assessment of the Impact of Small Hydropower Plants on the Ecological Status Indicators of Water Bodies: A Case Study in Lithuania

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 433
Author(s):  
Laima Česonienė ◽  
Midona Dapkienė ◽  
Petras Punys
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Suspended Solids ◽  
Ecological Status ◽  
Fish Abundance ◽  
Water Bodies ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Physico Chemical ◽  
The Impact

Hydropower plants produce renewable and sustainable energy but affect the river’s physico-chemical characteristics and change the abundance and composition of the aquatic organisms. The impact of large HPPs on the ecological conditions of surface water bodies have been extensively studied, but less attention has been paid to environmental impact studies of small hydropower plants (SHPs). The impact of hydropeaking on both the river flow regime and ecosystems has been well-studied for peaking mode plants, mainly medium to large-sized ones. However, for small hydroelectric power plants, and especially for those in lowland rivers, the available information on water quality, benthic macroinvertebrates communities and fish abundance, and biomass is not sufficient. Ten small hydropower plants were selected, and the ecological status of water bodies was assessed in different parts of Lithuania. The studies were performed at the riverbed upstream from the SHPs, where the hydrological regime has not changed, and downstream from the SHPs. It was found that the small hydropower plants do not affect the physico-chemical values of the water quality indicators. This study demonstrated that the total number of benthic macroinvertebrates taxa (TS) is influenced by the concentration of nitrogen and suspended solids, the water flow, the river area, and the current speed; the number of EPT (Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies)) taxa is influenced by the concentration of nitrogen and suspended solids. The studied indicators do not have a significant impact on biomass. The SHPs affect the fish abundance and biomass. The Lithuanian fish index (LFI) is influenced by the average depth and area of the river. Some SHPs operating in lowland areas may yield somewhat significant hydrograph ramping but more detailed investigation is needed to support the significance of this impact on the biological indices.

scholarly journals A peep into the state of ground water quality in the district of Tiruvannamalai, Tamil Nadu, India, from a radiological and chemical toxicity perspective

2021 ◽  
Vol 11 (5) ◽  
Author(s):  
Durai Ganesh ◽  
G. Senthilkumar ◽  
P. Eswaran ◽  
M. Balakrishnan ◽  
S. N. Bramha ◽  
...  
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Water Samples ◽  
Tamil Nadu ◽  
Potable Water ◽  
Uranium Concentration ◽  
The State ◽  
Chemical Toxicity ◽  
Ground Water Quality ◽  
Led Fluorimeter

AbstractUranium concentration in the ground water samples from the district of Tiruvannamalai, Tamil Nadu, was measured using an LED fluorimeter. All the samples were qualified as potable water from the radiological perspective. Though some samples showed mild chemical toxicity, they are still safe for ingestion. Different risk coefficients were calculated, and they were compared with recommended safety limits specified by various agencies. Software tools such as QGIS 15, GraphPad Prism 8 and Surfer 15 were employed for developing maps and plots.

scholarly journals Monitoring of Neotropical Streams Using Macroinvertebrate Communities: Evidence from Honduras

Environments ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 27
Author(s):  
Stefano Fenoglio ◽  
Alberto Doretto
Keyword(s):  
Water Quality ◽  
Working Party ◽  
Biological Indicators ◽  
Environmental Conservation ◽  
Taxon Richness ◽  
Macroinvertebrate Communities ◽  
Class A ◽  
Neotropical Streams ◽  
Local Contribution ◽  
Level Identification

Assessing the water quality by using biological indicators is a reliable and economically feasible way to promote environmental conservation in developing tropical countries. Here, we report one of the few examples of river biomonitoring in Honduras. In June 2005, benthic macroinvertebrates were collected from six sites in the Río Cangrejal basin. An adapted version of the Biological Monitoring Working Party index (BMWP) was used to assess the water quality because it is simple, consolidated, relatively easy to use, and needs a family-level identification. Moreover, two other community metrics were calculated, namely the total taxon richness and local contribution to beta diversity (LCBD). Differences in the biomonitoring and diversity metrics among sites and their correlations were statistically tested. Thirty-nine macroinvertebrate taxa were collected and, despite significant differences in the BMWP score, all sampling sites were classified in the high environmental quality class. A very strong and positive correlation between the BMPW and taxon richness was found, while LCBD did not vary significantly and did not correlate with the other metrics. Our results suggest that taxon richness could be used as a surrogate indicator to assess the water quality when consolidate biomonitoring methods are not available.

scholarly journals An Overview of DNA-Based Applications for the Assessment of Benthic Macroinvertebrates Biodiversity in Mediterranean Aquatic Ecosystems

Diversity ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 112
Author(s):  
Eftychia Tzafesta ◽  
Francesco Zangaro ◽  
Valeria Specchia ◽  
Maurizio Pinna
Keyword(s):  
Benthic Macroinvertebrates ◽  
Aquatic Ecosystems ◽  
Biodiversity Monitoring ◽  
Biodiversity Data ◽  
Management Tools ◽  
Aquatic Biodiversity ◽  
Current State ◽  
Dna Metabarcoding ◽  
Ecosystem Condition ◽  
Macroinvertebrate Species

The loss of aquatic biodiversity is increasing at a rapid rate globally. There is a worldwide effort to protect, preserve and restore aquatic ecosystems. For efficient biodiversity monitoring and reliable management tools, comprehensive biodiversity data are required. The abundance and species diversity of benthic macroinvertebrates are commonly used as indicators of the aquatic ecosystem condition. Currently, macroinvertebrate species biodiversity assessment is based on morpho-taxonomy, which could be enhanced by recent advances in DNA-based tools for species identification. In particular, DNA metabarcoding has the potential to identify simultaneously many different taxa in a pool of species and to improve aquatic biomonitoring significantly, especially for indicator species. This review is focused on the current state of DNA-based aquatic biomonitoring using benthic macroinvertebrates in the Mediterranean region.

Improving Water Quality Can Reduce Pyrogenic Reactions Associated With Reuse of Cardiac Catheters

2003 ◽  
Vol 24 (12) ◽  
pp. 955-960 ◽  
Author(s):  
Rosemary E. Duffy ◽  
Braulio Couto ◽  
Jussara M. Pessoa ◽  
Carlos Starling ◽  
Silma Pinheiro ◽  
...  
Keyword(s):  
Water Quality ◽  
Cardiac Catheterization ◽  
Linear Trend ◽  
Phase 1 ◽  
Standard Operating Procedures ◽  
Chi Square ◽  
Cardiac Catheters ◽  
Standard Operating ◽  
Chi Square Test ◽  
Belo Horizonte

AbstractObjective:To report the results of our preintervention investigation and subsequent 19-month three-phase intervention study designed to reduce pyrogenic reactions among patients undergoing cardiac catheterization using reprocessed catheters.Design:A case-control study for the preintervention period and a prospective cohort study for the intervention period.Setting:A 400-bed hospital in Belo Horizonte, Brazil.Participants:Any patient undergoing cardiac catheterization in the hospital.Interventions:Three intervention phases were implemented to improve the quality of the water supplied to the cardiac catheter reprocessing laboratory. Standard operating procedures for reprocessing cardiac catheters were established and reprocessing staff were trained and educated.Results:The rate of pyrogenic reactions decreased significantly during the intervention phases, from 12.8% (159 of 1,239) in phase 1 to 5.3% (38 of 712) in phase 2 to 0.5% (4 of 769) in phase 3 (chi-square test for linear trend, 97.5;P< .001).Conclusion:Improving water quality and using standard operating procedures for reprocessing catheters can prevent pyrogenic reactions in hospitalized patients.

scholarly journals A imprensa operária e a História da Educação: uma análise das contribuições dos jornais O Labor e O Confederal para a História da Educação nos anos iniciais de Belo Horizonte

2017 ◽  
Vol 1 (3) ◽  
pp. 94
Author(s):  
Renata Garcia Campos Duarte
Keyword(s):  
Working Class ◽  
History Of Education ◽  
Minas Gerais ◽  
The State ◽  
Social Classes ◽  
Education For All ◽  
Education History ◽  
History Of ◽  
Belo Horizonte ◽  
Educational Field

Este artigo tem como objetivo discutir a importância da utilização de impressos operários enquanto fonte para as pesquisas em história da educação, analisando alguns debates e ideias educacionais presentes em dois jornais operários de origem associativa: O Labor, da Confederação Auxiliadora dos Operários, e O Confederal, do Centro Confederativo dos Operários. As associações responsáveis pelos periódicos foram constituídas nos primeiros anos de existência de Belo Horizonte, cidade construída para sediar a nova capital do Estado de Minas Gerais. Os impressos operários, por sua vez, são entendidos em suas particularidades tendo-se em vista as suas características, os quais divulgavam algumas ideias e debates, como os referentes ao campo educacional. A partir da análise dos jornais foi apurada a existência de demandas e propostas por educação para todas as classes sociais, visto que o ensino em Belo Horizonte não era ofertado a todos, ou se era oferecido, não alcançava as classes sociais menos favorecidas.The working class press and the History of Education: an analysis of the contributions of the newspapers The Labor and The Confederal to the History of Education in the initial years of Belo Horizonte. This article aims to discuss the importance of the use of working class press as a source for research in the history of education, analyzing some debates and educational ideas present in two workers' newspapers of associative origin: The Labor, of the Auxiliary Confederation of Workers, and The Confederal, of the Confederative Center for Workers. The associations responsible for the periodicals were constituted in the first years of existence of Belo Horizonte, city built to host the new capital of the State of Minas Gerais. The working class periodicals, in turn, are understood in their particularities in view of their characteristics, which disseminated some ideas and debates, such as those concerning the educational field. From the analysis of the newspapers, the existence of demands and proposals for education for all social classes was verified, whereas the education in Belo Horizonte was not offered to all, or if it was offered, it did not reach the less favored social classes. Keywords: Workers associations; Belo Horizonte; Education; History of education; Working class press.

Sign in / Sign up

Export Citation Format

Share Document