scholarly journals Spatial Pattern of Benthic Diatoms and Water Quality Assessment Using Diatom Indices in a Subtropical River, China

2013 ◽  
Vol 42 (1) ◽  
pp. 20-28 ◽  
Author(s):  
Xiang Tan ◽  
Peiming Ma ◽  
Xiaoling Xia ◽  
Quanfa Zhang
Keyword(s):  
Water Quality ◽  
Spatial Pattern ◽  
Quality Assessment ◽  
Water Quality Assessment ◽  
Benthic Diatoms ◽  
Diatom Indices

scholarly journals The Application of Benthic Diatoms in Water Quality Assessment in Lepenci River Basin, Kosovo

2019 ◽  
Vol 20 (11) ◽  
pp. 43-57 ◽  
Author(s):  
Pajtim Bytyçi ◽  
Prespa Ymeri ◽  
Marton Czikkely ◽  
Osman Fetoshi ◽  
Albona Shala-Abazi ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
River Basin ◽  
Water Quality Assessment ◽  
Benthic Diatoms

Epiphytic diatoms and water quality in shallow lakes: the neutral substrate hypothesis revisited

2010 ◽  
Vol 61 (12) ◽  
pp. 1457 ◽  
Author(s):  
Cristina Cejudo-Figueiras ◽  
Irene Álvarez-Blanco ◽  
Eloy Bécares ◽  
Saúl Blanco
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
Shallow Lakes ◽  
Water Quality Assessment ◽  
Trophic Levels ◽  
Nutrient Concentrations ◽  
North West ◽  
Epiphytic Diatoms ◽  
Diatom Indices ◽  
Diatom Communities

For bioassessment of freshwaters, diatom indices have been mainly used in streams although their applicability in shallow lakes has been demonstrated in several studies. However, the influence of sampling substrata on periphytic diatom communities and on the ecological quality inferred from them has been paid little attention. In this paper, we test the ‘neutral substrate hypothesis’, which predicts no relevant influence of host plant type on their epiphytic community. Nineteen shallow permanent lakes from north-west Spain were studied and classified into three trophic levels. Epiphytic diatom communities growing on three different macrophytes for each trophic level were sampled and analysed. We assess: (1) which of the most common diatom indices provides a reliable water quality assessment, (2) how different plant substrata influence the diatom communities growing on them and (3) how these differences affect water quality assessment. Similarity tests showed significant differences in the composition of diatom assemblages among nutrient concentrations and host macrophytes. In contrast, ANOVA results for selected diatom-based metrics showed significant differences among trophic levels but not between different plant substrata. This supports the use of epiphytic diatoms as biological indicators for shallow lakes irrespective of the dominant macrophyte.

scholarly journals Molecular versus morphological data for benthic diatoms biomonitoring in Northern Europe freshwater and consequences for ecological status

2019 ◽  
Vol 3 ◽  
Author(s):  
Bonnie Bailet ◽  
Agnes Bouchez ◽  
Alain Franc ◽  
Jean-Marc Frigerio ◽  
François Keck ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
Dna Markers ◽  
Ecological Status ◽  
Water Quality Assessment ◽  
Ecological Assessment ◽  
Benthic Diatoms ◽  
Northern Europe ◽  
Dna Metabarcoding ◽  
Reference Databases

Diatoms are known to be efficient bioindicators for water quality assessment because of their rapid response to environmental pressures and their omnipresence in water bodies. The identification of benthic diatoms communities in the biofilm, coupled with quality indices such as the Indice de polluosensibilité spécifique (IPS) can be used for biomonitoring purposes in freshwater. However, the morphological identification and counting of diatoms species under the microscope is time-consuming and requires extensive expertise to deal with a constantly evolving taxonomy. In response, a molecular-based and potentially more cost-effective method has been developed, coupling high-throughput sequencing and DNA metabarcoding. The method has already been tested for water quality assessment with diatoms in Central Europe. In this study, we applied both the traditional and molecular methods on 180 biofilms samples from Northern Europe (rivers and lakes of Fennoscandia and Iceland). The DNA metabarcoding data were obtained on two different DNA markers, the 18S-V4 and rbcL barcodes, with the NucleoSpin Soil kit for DNA extraction and sequenced on an Ion Torrent PGM platform. We assessed the ability of the molecular method to produce species inventories, IPS scores and ecological status class comparable to the ones generated by the traditional morphology-based approach. The two methods generated correlated but significantly different IPS scores and ecological status assessment. The observed deviations are explained by presence/absence and abundance discrepancies in the species inventories, mainly due to the incompleteness of the barcodes reference databases, primer bias and strictness of the bioinformatic pipeline. Abundance discrepancies are less common than presence/absence discrepancies but have a greater effect on the ecological assessment. Missing species in the reference databases are mostly acidophilic benthic diatoms species, typical of the low pH waters of Northern Europe. The two different DNA markers also generated significantly different ecological status assessments. The use of the 18S-V4 marker generates more species inventories discrepancies, but achieves an ecological assessment more similar to the traditional morphology-based method. Further development of the metabarcoding method is needed for its use in environmental assessment. For its application in Northern Europe, completion and curation of reference databases are necessary, as well as evaluation of the currently available bioinformatics pipelines. New indices, fitted for environmental biomonitoring, should also be developed directly from molecular data.

scholarly journals Water quality assessment of the DTD canal system by diatom indices

2014 ◽  
pp. 23-33
Author(s):  
Olga Jakovljevic ◽  
Jelena Krizmanic ◽  
Mirko Cvijan
Keyword(s):  
Water Quality ◽  
Sulfuric Acid ◽  
Quality Assessment ◽  
Standard Method ◽  
Water Quality Assessment ◽  
Indicator Values ◽  
Canal System ◽  
Diatom Index ◽  
Diatom Indices ◽  
Concentrated Sulfuric Acid

The main objective of this paper is to evaluate the water quality based on diatom indices in the study area of the Danube-Tisa-Danube (DTD) canal system. We used four diatom indices: Watanabe?s index (DAIpo), biological diatom index (BDI or IBD), the trophic diatom index (TDI) and index of pollution sensitivity (IPS). Benthic samples were collected in the spring and autumn 2002 and 2003 from nine sampling sites. The standard method with concentrated sulfuric acid was used for treatment of the algological samples [Krammer and Lange-Bertalot 1986] and then permanent slides of diatoms were made. The abundance was estimated by counting 400 valves of each taxa present on slide [Round 1991, 1993]. Investigation of the DTD canal system resulted in description of 145 diatom taxa. Based on the indicator values of identified taxa we calculated four diatom indices (DAIpo, BDI, TDI and IPS) and estimated water quality in the study area of the DTD canal system.

scholarly journals A Water Quality Assessment Based on Benthic Diatoms of the Timok River Basin (Eastern Serbia) under Multiple Anthropogenic Pressures

2020 ◽  
Author(s):  
Nikola Djukić ◽  
Božica Vasiljević ◽  
Djuradj Milosević ◽  
Aleksandar Dj. Valjarević ◽  
Tatjana Jakšić ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
River Basin ◽  
Water Quality Assessment ◽  
Benthic Diatoms ◽  
Anthropogenic Pressures

scholarly journals Substrate type selection in diatom based lake water quality assessment

2021 ◽  
pp. 21
Author(s):  
Ivana S. Trbojević ◽  
Slađana S. Popović ◽  
Vanja V. Milovanović ◽  
Dragana D. Predojević ◽  
Gordana V. Subakov Simić ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
Community Composition ◽  
Lake Water ◽  
Water Quality Assessment ◽  
Diatom Community ◽  
Substrate Type ◽  
Lake Water Quality ◽  
Diatom Indices ◽  
Diatom Community Composition

Various studies report contrasting results on the substrate-type effect on diatom community composition, but the particularly important question is whether or not it affects diatom-based assessments of water quality. We investigated whether the substrate type is a significant predictor of the diatom community composition and if it affects lake water quality assessment based on diatom indices. This study took place in Sava Lake (Serbia). We used glass, ceramic, willow and yew tree tiles as artificial substrates for periphyton development, and pebbles from the lake littoral as natural substrate. Results revealed differences in both the diatom community composition and diatom indices values related to the substrates. A distinction was recognized between natural, artificial wooden, and artificial inert substrates. However, the final lake quality assessment based on diatom indices was more or less similar in all substrate types in our study, and depended on value ranges associated with water quality classification and on diatom index choices. Artificial substrates in our study did show potential as an alternative for natural substrate, but further studies are required, particularly in various types of lentic ecosystems to confirm our findings and support artificial substrate employment in lake water quality assessment.

scholarly journals Using diatom indices for water quality assessment in a subtropical river, China

2012 ◽  
Vol 20 (6) ◽  
pp. 4164-4175 ◽  
Author(s):  
Xiang Tan ◽  
Fran Sheldon ◽  
Stuart E. Bunn ◽  
Quanfa Zhang
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
Water Quality Assessment ◽  
Diatom Indices
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