Estimating quality of archive urban stream macroinvertebrate samples for genomic, transcriptomic and proteomic assessment

Considering the current importance watercourses quality conservation, it is important to establish relationships between parameters that enable evaluation of the origins of changes in water quality, allowing actions to mitigate them. However, it is important to improve the association of different variables and to take sufficient samples. This study associates usual techniques and parameters to analyse the water quality of an urban river from Paraná State, Brazil. For this, we used biological indicators (aquatic macroinvertebrates), physical-chemical (temperature, turbidity, true colour, pH, DO and BOD5,20) indicators and microbiological (faecal and total coliforms) indicators. These indicators were related to land use and occupation classes obtained from high resolution QuickBird 2 images. For this association, the surroundings (450 meters buffer) of three distinct points of the river were considered: I. Near the spring; II. In the downtown city; and III. In a residential neighbourhood. Different values of physical, chemical and microbiological variables were detected along the river, showing evident relationships between them and with the use and occupation of the urban and peri-urban space in the characterization of surface waters. The association design was able to detect the landscape effect on water quality in a coherent way and that these connections were mainly related to suppression of the riparian forest present in the surroundings, further demonstrating the importance of this vegetation for the maintenance of watercourse quality.

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Bioassessment of Water Quality of an Urban Stream: A Case Study of Marlborough Stream, Harare, Zimbabwe

Aquatic Biology Research ◽

10.12966/abr.05.03.2014 ◽

2014 ◽

Vol 2 (2) ◽

pp. 36

Author(s):

Simbarashe Mudyazhezha ◽

Beavan Ngoshi

Keyword(s):

Water Quality ◽

Urban Stream

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Spatial Changes in Invertebrate Structures as a Factor of Strong Human Activity in the Bed and Catchment Area of a Small Urban Stream

Water ◽

10.3390/w12030913 ◽

2020 ◽

Vol 12 (3) ◽

pp. 913 ◽

Cited By ~ 1

Author(s):

Robert Czerniawski ◽

Łukasz Sługocki ◽

Tomasz Krepski ◽

Anna Wilczak ◽

Katarzyna Pietrzak

Keyword(s):

Human Activity ◽

Catchment Area ◽

Large River ◽

Urban Streams ◽

Urban Stream ◽

Abiotic Conditions ◽

Spatial Changes ◽

The Impact ◽

Ecological Potential

The threats to small urban streams lead to a decrease in their water quality and dysregulate their ecological balance, thereby affecting the biodiversity and causing degradation of indicators that determine the ecological potential. The aim of our study was to determine the impact of abiotic conditions induced by intensive human activity on the community structures of invertebrates (zooplankton and macroinvertebrates) in the small urban stream Bukówka in the Szczecin agglomeration (NW Poland). This stream exhibits the same characteristics as a large river, in which the mass of live organic matter increases with their length. The composition of invertebrates (zooplankton and macroinvertebrates) was strongly influenced by the changes caused by humans in the stream bed. The construction of small reservoirs and bed regulation in this small urban streams had a similar effect on the quality of the water and ecological potential as in large rivers, but at a lower scale.

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Evaluation of water quality of an urban stream in southeastern Brazil using Chironomidae larvae (Insecta: Diptera)

Neotropical Entomology ◽

10.1590/s1519-566x2010000600004 ◽

2010 ◽

Vol 39 (6) ◽

pp. 873-878 ◽

Cited By ~ 9

Author(s):

Vívian Oliveira ◽

Renato Martins ◽

Roberto Alves

Keyword(s):

Water Quality ◽

Urban Stream ◽

Southeastern Brazil ◽

Chironomidae Larvae

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Understanding Social and Environmental Hazards in Urban Areas: An Analysis from Barranquilla, Colombia

Social Sciences ◽

10.3390/socsci10110411 ◽

2021 ◽

Vol 10 (11) ◽

pp. 411

Author(s):

Marina B. Martínez-González ◽

Celene B. Milanes ◽

Jorge Moreno-Gómez ◽

Samuel Padilla-Llano ◽

Alex Vásquez ◽

...

Keyword(s):

Low Income ◽

Urban Areas ◽

Economic Conditions ◽

Urban Stream ◽

Preventive Action ◽

Chi Square ◽

Social Risks ◽

Chi Square Test ◽

The City

The present research aims to understand the challenges faced by a Colombian city in the context of multidimensional risk scenarios, given the existing demographic and socio-economic conditions and local perspectives and perceptions regarding socio-environmental risks. The research was undertaken in the city of Barranquilla, northern Colombia. A survey was designed to analyze (1) the general socio-economic and vulnerability conditions of a communities’ sample, (2) information related to hazards and disaster risk in their neighbourhoods, and (3) information on actions to mitigate risk. Three hundred and ninety-one people were surveyed. Likert scale and Pearson's Chi-square test and descriptive, inferential statistical methods, regression models, and the Mann–Whitney U test were used to process the results. Respondents lived, in general, under precarious socio-economic conditions (such as low income or lack of infrastructure and others). Given socio-environmental constraints, the research revealed that hazards such as urban stream flooding and robbery were the most negatively associated with the respondent’s quality of life. Regarding the actions to avoid losses, 84% of respondents had not implemented any preventive action. Respondents also have low awareness of the need to implement risk prevention actions. Social risks and the configuration of anthropic hazards stand out as principal centres for concern.

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