Sensitivity and reliability of diatom metrics and guilds in detecting the impact of urbanization on streams

Mbao, Evance Omondi; Gao, Jin; Yu, Wang; Sitoki, Lewis; Pan, Yangdong; Wang, Beixin

doi:10.1016/j.ecolind.2020.106506

Cited by 11 publications

(3 citation statements)

References 84 publications

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“…37,38 Many groups have centered on investigating properties of diatom for environmental monitoring, especially the impedance spectrum and proliferation characterization. 37,38 For this, eight-channel devices were leveraged in the selection of C. scutellum for detection of their impedance spectrum. Schematic and actual images of the selection process are given in Figure 8a…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Diatom is one of the most important groups of phytoplankton and serves as bioindicators for water quality assessment and urbanization evaluation owing to primary productivity and sensitive community features to environmental variables. , Many groups have centered on investigating properties of diatom for environmental monitoring, especially the impedance spectrum and proliferation characterization. , For this, eight-channel devices were leveraged in the selection of C. scutellum for detection of their impedance spectrum. Schematic and actual images of the selection process are given in Figure a,b.…”

Section: Resultsmentioning

confidence: 99%

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Enrichment and Selection of Particles through Parallel Induced-Charge Electro-osmotic Streaming for Detection of Low-Abundance Nanoparticles and Targeted Microalgae

Chen

Liu

et al. 2023

Anal. Chem.

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Manipulation of micro- and nanoscale objects is an essential procedure in many detection and sensing applications, including disease diagnosis and environmental monitoring. Induced-charge electro-osmotic (ICEO) vortices present excellent advantages in the enrichment and selection of micro/nanoscale particles for downstream detection due to gentle conditions and contactless operation, but the application of this method is currently constrained by the throughput. Double-layer charging at the ends of bipolar electrodes can maintain a continuous flow of electric current in the fluidically isolated channels, which provides a feasible method to manipulate particles using parallel ICEO vortices, promoting throughput of particle manipulation without compromising efficiency and overcoming the complicated ohmic contact of electrodes. Encouraged by these, we put forward a novel method with parallel ICEO vortices to manipulate micro/nanoscale samples for downstream detection. First, we study the extension regulation of the low-frequency electric field and mediating effect of the open BPEs on the extended electric field and characterize electric equilibrium states of microparticles and their voltage dependence. Afterward, we leverage this method to enrich nanoparticles for detection of low-abundance nanoparticles with about 20- and 40-fold fluorescence intensities by integrating with a simple fiber-optic sensor. Furthermore, this technique is engineered for the selection of targeted microalgae to continuously detect their proliferation behaviors by combining with a homemade electrical impedance spectroscopy device. This method can reinforce the throughput of ICEO vortices and enables it to integrate with simple and economical sensors to accomplish disease diagnosis and environmental monitoring.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enrichment and Selection of Particles through Parallel Induced-Charge Electro-osmotic Streaming for Detection of Low-Abundance Nanoparticles and Targeted Microalgae

Chen

Liu

et al. 2023

Anal. Chem.

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“…Biological monitoring indicates the cumulative effects of all environmental parameters on the ecosystems (Lobo et al, 2004(Lobo et al, , 2016(Lobo et al, , 2019Çelekli and Kapı, 2019;Ballesteros et al, 2020;Mbao et al, 2020;Pajunen et al, 2020). The water quality and long-term scale changes observed by using the biological assessment should be supported by physical and chemical approaches (Çelekli and Kapı, 2019;Lobo et al, 2019;Mbao et al, 2020;Pajunen et al, 2020). On the other hand, there are some challenges in biological monitoring, and they should not be ignored.…”

Section: Bioassessment Of Surface Watersmentioning

confidence: 99%

Bioassessment of water quality of surface waters using diatom metrics

Çelekli¹,

Lekesiz²,

Yavuzatmaca³

2021

Turk J Bot

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Bioassessment of surface waters is one of the most important approaches to predict the deterioration of ecosystems and achieve environmental sustainability according to the application of the European Water Framework Directive. The present review emphasizes the importance of the bioassessment of freshwater quality especially running waters based on diatom metrics. Nutrient enrichment and hydromorphological alternation driven by human activities are the main factors for the ecological compromise of freshwater ecosystems. Currently, the bioassessment of the ecological condition of inland water bodies is adopted worldwide. Bioassessment is complementary to physico-chemical and hydromorphological data for evaluating the ecological conditions of rivers; however, measuring all the physical and chemical changes is expensive and impractical. Therefore, monitoring biota helps to determine the changes occurring in ecosystems. Thus, diatoms are used as bioindicators to assess environmental conditions of the ecosystems, but their use requires great taxonomic knowledge, otherwise, the results will be biased. Many diatom indices have been developed based on the trophic weight and indicator values of diatoms in different ecoregions in the last decades. This review highlights the importance and advantages of using diatom metrics in the bioassessment of the ecological status of surface waters in the different ecoregions, especially running water. To analyze the complex response of diatom communities to environmental gradients and assess the quality of the ecosystem, multivariate statistical approaches are needed.The challenge here is how to define criteria for classes of water bodies in a biologically meaningful way. For this reason, Biological Condition Gradient is suggested as an appropriate and effective approach to develop trophic criteria based on the relationships between nutrient concentrations and biological indicators of ecological conditions.

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A bibliometric study on the use of diatoms in water quality monitoring and bioassessment in Africa across 10-year (2012–2022) period

Mbao

Odinga²,

Nyika³

et al. 2022

Aquat Sci

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Sensitivity and reliability of diatom metrics and guilds in detecting the impact of urbanization on streams

Cited by 11 publications

References 84 publications

Enrichment and Selection of Particles through Parallel Induced-Charge Electro-osmotic Streaming for Detection of Low-Abundance Nanoparticles and Targeted Microalgae

Enrichment and Selection of Particles through Parallel Induced-Charge Electro-osmotic Streaming for Detection of Low-Abundance Nanoparticles and Targeted Microalgae

Bioassessment of water quality of surface waters using diatom metrics

A bibliometric study on the use of diatoms in water quality monitoring and bioassessment in Africa across 10-year (2012–2022) period

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