Assessment of the spatial and temporal variations in periphyton communities along a small temperate river system: A multimetric and stable isotope analysis approach

Dalu, Tatenda; Bere, Taurai; Richoux, Nicole B.; Froneman, P. W.

doi:10.1016/j.sajb.2015.05.028

Cited by 15 publications

(2 citation statements)

References 35 publications

(60 reference statements)

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“…The physico-chemical variable values measured during the study period are presented in detail in Dalu et al (2014cDalu et al ( , 2015a. Nutrient concentrations showed various patterns along the length of the Kowie River ( ).…”

Section: Physico-chemical Variablesmentioning

confidence: 99%

Assessment of water quality based on diatom indices in a small temperate river system, Kowie River, South Africa

Dalu

Bere

Froneman

2016

WSA

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This study aimed to assess the impact of land use patterns on water quality and benthic diatom community structure and to test the applicability of diatom indices developed in other regions of the world to a small temperate southern African river system. Sampling was conducted at eight study sites along the length of the river on four separate occasions. Multivariate data analyses were performed on the diatom community dataset to specify the main gradients of floristic variation and to detect and visualize similarities in diatom samples in relation to land-use patterns within the catchment. One hundred and twelve (112) diatom species belonging to 36 genera were recorded during the study. Canonical correspondence analysis (CCA) demonstrated that variations in the benthic diatom community structure were best explained by ammonium, nitrate, conductivity, pH, temperature, resistivity and water flow. OMNIDIA was used for calculation of selected diatom water quality indices. A number of the indices, e.g., the trophic diatom index (TDI), eutrophication/pollution index and biological index of water quality (BIWQ), either under-or over-estimated the water quality of the system. With few exceptions, there were no significant correlations (p> 0.05) between the diatom indices' values and the nutrient variables. The absence of any significant correlations between the diatom indices' values and selected physico-chemical variables suggests that indices developed in other regions of the world may not be suitable for temperate southern African rivers.

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Section: Physico-chemical Variablesmentioning

confidence: 99%

Assessment of water quality based on diatom indices in a small temperate river system, Kowie River, South Africa

Dalu

Bere

Froneman

2016

WSA

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“…diatoms and macroinvertebrates) to assess the impact on pollution on river water quality. Most studies in the region on water quality assessments tend to concentrate on a single parameter, either macroinvertebrates (Dallas 1997;Bere et al 2016a, b) or diatoms (De la Rey et al 2004;Bere and Mangadze 2014;Dalu et al 2015. The study's main aim was to investigate the responses of benthic diatoms or macroinvertebrates to water quality changes along the Ngamo River which drains part of the urban and agricultural area in the Midlands Province of Zimbabwe.…”

Section: Introductionmentioning

confidence: 99%

Assessment of river quality in a subtropical Austral river system: a combined approach using benthic diatoms and macroinvertebrates

2017

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River systems constitute areas of high human population densities owing to their favourable conditions for agriculture, water supply and transportation network. Despite human dependence on river systems, anthropogenic activities severely degrade water quality. The main aim of this study was to assess the river health of Ngamo River using diatom and macroinvertebrate community structure based on multivariate analyses and community metrics. Ammonia, pH, salinity, total phosphorus and temperature were found to be significantly different among the study seasons. The diatom and macroinvertebrate taxa richness increased downstream suggesting an improvement in water as we moved away from the pollution point sources. Canonical correspondence analyses identified nutrients (total nitrogen and reactive phosphorus) as important variables structuring diatom and macroinvertebrate community. The community metrics and diversity indices for both bioindicators highlighted that the water quality of the river system was very poor. These findings indicate that both methods can be used for water quality assessments, e.g. sewage and agricultural pollution, and they show high potential for use during water quality monitoring programmes in other regions.

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Spatial and temporal variations in composition of algae assemblages with environmental variables in an urban stream (Ankara, Turkey)

Özer

Erkaya

Koçer

et al. 2019

Environ Monit Assess

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Assessment of the spatial and temporal variations in periphyton communities along a small temperate river system: A multimetric and stable isotope analysis approach

Cited by 15 publications

References 35 publications

Assessment of water quality based on diatom indices in a small temperate river system, Kowie River, South Africa

Assessment of water quality based on diatom indices in a small temperate river system, Kowie River, South Africa

Assessment of river quality in a subtropical Austral river system: a combined approach using benthic diatoms and macroinvertebrates

Spatial and temporal variations in composition of algae assemblages with environmental variables in an urban stream (Ankara, Turkey)

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