Assessment of potential reference sites for evaluating the ecological status of subtropical and temperate Brazilian lotic systems using the epilithic diatom community

Freitas, Núbia Cristina Weber; Heinrich, Carla Giselda; Etges, Tanise; Celente, Gleison de Souza; Lobo, Eduardo A.

doi:10.1007/s11356-020-11136-w

Cited by 10 publications

(6 citation statements)

References 38 publications

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“…Spatial and temporal variation in environmental variables affected the distribution of diatom assemblages in the current study, which is in agreement with findings of ecological studies (Feio et al, 2020; Freitas et al, 2021). Results of ANOSIM indicated that there was no significant difference in the diatom composition of Değirmendere and Bulaklı streams among sampling seasons.…”

Section: Discussionsupporting

confidence: 93%

Eco‐assessment of Değirmendere and Bulaklı streams using diatom indices from different ecoregions

Çelekli

Yıldız

2022

Ecological Research

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Diatom metrics are important tools for evaluating the environmental conditions of streams for the achievement of environmental sustainability. Aim of the present study was to assess the ecological status of De girmendere and Bulaklı streams using diatom indices developed in different ecoregions and to elucidate responses of diatom assemblages to stressors using multivariate approaches. Analysis of similarity percentage indicated a 74% dissimilarity between De girmendere and Bulaklı streams with the most contribution of Encyonopsis minuta, Achnanthidium minutissimum, Achnanthidium druartii, Amphora indistincta, and Gomphonema cuneolus species to this dissimilarity.The first two axes of canonical correspondence analysis exhibited a strong correlation (93.1%) between diatom assemblages and environment variables. Pollution-tolerant species were associated with Bulaklı stream, whereas pollution-sensitive species displayed relatedness to De girmendere stream. Conductivity, salinity, oxidation-reduction potential, total phosphorus (TP), and orthophosphate were the significant effective environmental factors on the spatiotemporal distribution of diatom assemblages. Used diatom indices showed significantly positive and negative correlations with TP gradient. The results of bioassessment exhibited that diatom indices have different scores for the ecological status of the sampling stations. European diatom indices except Trophic Diatom Index and Duero Diatom Index mainly showed similar behavior in the bioassessment of ecological conditions of De girmendere and Bulaklı streams. Among European diatom indices, Trophic Index Turkey was more competitive and could give better results in the bioassessment of streams. Results indicated that ecoregional specific diatom index could be used as a suitable tool to accurately evaluate the surface water quality.

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Section: Discussionsupporting

confidence: 93%

Eco‐assessment of Değirmendere and Bulaklı streams using diatom indices from different ecoregions

Çelekli

Yıldız

2022

Ecological Research

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“…Its laws and regulations are governed primarily by the U.S. Environmental Protection Agency (EPA) in coordination with state governments (USEPA, 2016). Since 1990, more than twenty directives have been presented for the ecological quality and the sustainable use of streams around the world (Hering et al, 2010;Freitas et al, 2020).…”

Section: Legislation Of Clean Water Actmentioning

confidence: 99%

“…WFD's main goal is to prevent, protect, and improve the ecological state of aquatic ecosystems. Freitas et al (2020) reported that the WFD aims the rational use of water resources, conservation, and improvement of the quality of aquatic systems (surface, estuarine, coastal, and underground waters) to reach "good ecological status" until the year 2021.…”

Section: European Water Framework Directivementioning

confidence: 99%

“…Explaining multi-stressor interactions is not easy because it requires the use of multivariate statistical analyses. Therefore, multivariable statistical approaches are used to not only explain the relationship between diatom assemblages and environmental stressors but also evaluate the water quality of the ecosystem (Hering et al, 2010;Çelekli and Lekesiz, 2020;Freitas et al, 2020).…”

Section: Rhoicosphenia Abbreviata Ti Tittdilmentioning

confidence: 99%

“…Expansion of human activities (e.g., urbanization, wastewater disposal, agricultural land-uses, modifications, combustion of fossil fuels), increasing human populations and changes in global climate have extensively altered the freshwater ecosystems by the modifications impacting the physical, chemical, and biological features (Çelekli and Lekesiz, 2020). These anthropogenic factors lead to the deterioration of freshwater resources that create many problems in the allocation of equal and sustainable water to those who benefit from resources (Best, 2019;Freitas et al 2020).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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Eco-assessment of least disturbed areas of the Antalya River basin: application of diatom indices from different ecoregions

Çelekli

Lekesiz

Çetin

2021

Environ Sci Pollut Res

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Assessment of potential reference sites for evaluating the ecological status of subtropical and temperate Brazilian lotic systems using the epilithic diatom community

Cited by 10 publications

References 38 publications

Eco‐assessment of Değirmendere and Bulaklı streams using diatom indices from different ecoregions

Eco‐assessment of Değirmendere and Bulaklı streams using diatom indices from different ecoregions

Bioassessment of water quality of surface waters using diatom metrics

Eco-assessment of least disturbed areas of the Antalya River basin: application of diatom indices from different ecoregions

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