scholarly journals Genetic barcoding of Ecuadorian epilithic diatom species suitable as water quality bioindicators

2020 ◽  
Vol 343 (1) ◽  
pp. 41-52
Author(s):  
Isabel Ballesteros ◽  
Pablo Castillejo ◽  
Adriana Paulina Haro ◽  
Cuthy Cristina Montes ◽  
Carla Heinrich ◽  
...  
Keyword(s):  
Water Quality ◽  
Diatom Species ◽  
Genetic Barcoding ◽  
Epilithic Diatom

scholarly journals The use of epilithic diatom assemblages in assessing land use in Silago, Southern Leyte, Philippines

2019 ◽  
Vol 12 (2) ◽  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Tolerance Index ◽  
Diatom Species ◽  
Diatom Assemblages ◽  
Pollution Tolerance ◽  
Land Use Types ◽  
Freshwater Bodies ◽  
Forested Areas ◽  
Epilithic Diatom

Silago is a municipality in Southern Leyte in which logging for high-quality timber and land clearing for agricultural purposes threaten stream ecosystems. The objective of this study was to assess the response of diatom assemblages in relation to land use. Diatoms and water quality sampling was done at 27 sites on two sampling occasions (June and July 2014). Multiple diatom metrics were calculated to measure the response of diatoms to changes in land use. In all, 135 diatom species distributed to 48 genera were recorded. The results showed that diatom species and their attributes gave similar responses to those obtained in environmental variables. Pollution tolerance index classified all sampling sites as oligo-b-mesosaprobic. Meanwhile, Cymbella richness, percent motile taxa, and percent Achnanthidium minutissimum indicated good water quality in forested areas, distinguishing them from other land use types. Contrary to other studies, species richness was found to increase with greater degrees of disturbance, thus giving unreliable evaluation of water quality. Overall, the study suggests that epilithic diatoms can be applied in biomonitoring of freshwater bodies in the country.

Epiphytic and epilithic diatom communities along environmental gradients in the Nepalese Himalaya: implications for the assessment of biodiversity and water quality

1997 ◽  
Vol 138 (4) ◽  
pp. 465-482
Author(s):  
Heike Rothfritz ◽  
Ingrid Jüttner ◽  
A. M. Suren ◽  
S. J. Ormerod
Keyword(s):  
Water Quality ◽  
Environmental Gradients ◽  
Diatom Communities ◽  
Epilithic Diatom

Epilithic diatoms of the St. Lawrence River and their relationships to water quality

1998 ◽  
Vol 76 (2) ◽  
pp. 251-257 ◽  
Author(s):  
Euan D Reavie ◽  
John P Smol
Keyword(s):  
Water Quality ◽  
Chlorophyll A ◽  
Suspended Solids ◽  
Fecal Coliforms ◽  
Weighted Averaging ◽  
Quebec City ◽  
Diatom Assemblages ◽  
Epilithic Diatoms ◽  
Epilithic Diatom ◽  
St Lawrence River

Epilithic diatoms were sampled at 48 sites along the St. Lawrence River, from Salaberry de Valleyfield to Québec City, in an attempt to determine how diatom assemblages were related to measured water quality variables. Canonical correspondence analysis was used to explore the relationships between environmental variables and patterns in the epilithic diatom assemblages. "Distance downstream from Cornwall" was determined to be the strongest variable influencing the structure of epilithic diatom assemblages, likely due to the effect of tides (favouring aerophilic species) closer to the river outlet. Variables related to pollution (suspended solids, fecal coliforms, chlorophyll a) also explained significant (P < 0.05) amounts of variance in the diatom assemblages. The optima of common diatom species to suspended solids were explored further. Reconstructive models using weighted-averaging calibration and regression illustrated that "distance from Cornwall" and concentrations of suspended solids, fecal coliforms, and chlorophyll a, the most influential variables, could be inferred from the diatom assemblages. When compared with the inference models developed for pollution variables using epiphytic diatom assemblages (attached to macrophytes or Cladophora), the epilithon model appears to perform better.Key words: diatoms, rocks, epilithic, St. Lawrence River, water quality, calibration.

New taxa of the genus Navicula (Bacillariophyceae) in the diatom flora of Serbia

2014 ◽  
Vol 43 (2) ◽  
Author(s):  
Danijela Vidakovic ◽  
Jelena Krizmanić ◽  
Sanja Šovran
Keyword(s):  
New Taxa ◽  
Floristic Diversity ◽  
Diatom Species ◽  
River Ecology ◽  
Stone Surface ◽  
Diatom Flora ◽  
Acid Method ◽  
Epilithic Diatom

AbstractThe main objective of this paper is to report two benthic, epilithic diatom species from the Raška River. Samples were collected in April, June, August and November 2011 and March and May 2012 from 5 localities along the Raška River by scraping off the stone surface using a brush. Diatom frustules were first cleaned using the cold acid method, and then mounted on permanent slides. Descriptions (main valve measurements of the populations in the Raška River), ecology, distribution in Serbia and Europe, and appropriate photomicrographs of two species are presented. Navicula jakovljevicii Hustedt and Navicula catalanogermanica Lange-Bertalot & Hofmann are rarely found in Europe and these are new distributional records. These new taxa significantly contribute to diatom floristic diversity of the Raška River.

scholarly journals Bioindication of Water Quality by Diatom Algae in High Mountain Lakes of the Natural Park of Artabel Lakes, (Gümüşhane, Turkey)

2020 ◽  
Vol 22 (1) ◽  
pp. 1-28
Author(s):  
Bülent Şahin ◽  
Bülent Akar ◽  
Sophia Barinova
Keyword(s):  
Water Quality ◽  
Quality Standards ◽  
Mountain Lakes ◽  
High Mountain ◽  
Diatom Species ◽  
Diatom Algae ◽  
Water Quality Standards ◽  
High Mountain Lakes ◽  
Natural Park ◽  
First Results

Abstract The first results of bioindicative analysis of water quality in the high-mountainous lakes of the Artabel Lakes Natural Park are presented using diatom species. A total of 95 diatom taxa collected in August 2013 and 2016 were identified and used as bioindicators for ten environmental variables. Bioindication, statistical methods and comparative floristic results show that the waters in all the lakes studied were fresh, low-saline, with circum-neutral pH and organically uncontaminated. The results of bioindication can be used as etalons for future monitoring of lakes in order to protect species found in the natural park, and can also be included in the national system of water quality standards in Turkey.

scholarly journals Epilithic Diatom Abundance Study in the Batang Kuranji River in Padang City, West Sumatra

2020 ◽  
Vol 4 (2) ◽  
pp. 39
Author(s):  
Mida Yulia Murni
Keyword(s):  
Water Quality ◽  
Quality Parameters ◽  
Inorganic Materials ◽  
Water Quality Parameters ◽  
Dominant Group ◽  
West Sumatra ◽  
Almost All ◽  
Physical And Chemical ◽  
Epilithic Diatom ◽  
Chemical Water

A study about abundant of epilithic diatom was conducted on 2017 in Kuranji River. The objective of this study was to clarify species and abundant of epilithic diatom in Batang Kuranji River. Samples were collected in 3 stations by purposive sampling and brushing method. The results showed that totally 82 species in 22 genera had been found. The total abundant of epilithic diatom was 15139,26 individual/cm2. The highest abundance of epilithic diatom was found in station I (Batu Busuak) and the lowest in station III (Sawah Liek). Synedra sp and Fragillaria sp were dominant group of diatoms which are found in almost all sites. Some physical and chemical water quality parameters were showed that Batang Kuranji River were polluted slightly by organic and inorganic materials.

Water quality assessment of the Pazarsuyu Stream based on epilithic diatom communities

2017 ◽  
Vol 190 (3) ◽  
pp. 189-197
Author(s):  
Bengü Temizel ◽  
Elif Neyran Soylu ◽  
Faruk Maraşlıoğlu
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
Water Quality Assessment ◽  
Diatom Communities ◽  
Epilithic Diatom

Possible Relationships Between Plankton-Diatom Species Numbers and Water-Quality Estimates

Ecology ◽  
1964 ◽  
Vol 45 (4) ◽  
pp. 809-823 ◽  
Author(s):  
Louis G. Williams
Keyword(s):  
Water Quality ◽  
Diatom Species ◽  
Species Numbers

scholarly journals Epilithic diatoms (Bacillariophycae) from streams in Ramsar, Iran

2011 ◽  
Vol 70 (2) ◽  
pp. 167-190 ◽  
Author(s):  
Ali Soltanpour-Gargari ◽  
Martin Lodenius ◽  
Friedel Hinz
Keyword(s):  
Species Richness ◽  
High Conductivity ◽  
Nutrient Concentrations ◽  
Diatom Species ◽  
Epilithic Diatoms ◽  
Small Streams ◽  
High Nutrient ◽  
Northwest Iran ◽  
First Time ◽  
Epilithic Diatom

Epilithic diatoms (Bacillariophycae) from streams in Ramsar, Iran Epilithic diatoms were identified from five small streams and one canal in Ramsar, northwest Iran. Atotal of 155 diatom taxa belonging to 37 genera were found and only two species remained unidentified (Fragilaria sp. and Nitzschia sp.). Achnanthes, Nitzschia, Navicula, Cocconeis, Melosira, Amphora, Craticula, Diatoma, Surirella, Cymbella, Diploneis and Entomoneis were among the most abundant genera. Eighty seven taxa were recorded for the first time in Iran. Thirty two of the genera belong to the Pennales and 5 to the Centrales. Species richness was rather high ranging from 66 to 95 taxa at the six sites studied. The epilithic diatom species found in Ramsar were dominated by cosmopolitan taxa found in meso- to fairly eutrophicwaters with high conductivity and high nutrient concentrations. The abundances found at all six sites were compiled in order to estimate the overall abundance of each taxon in Ramsar. This study includes EM pictures of diatoms observed in Ramsar, Iran.

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