Towards a representative periphytic diatom sample

Abstract. The need to acquire a representative periphytic diatom sample for river water quality monitoring has been recognised in the development of existing diatom indices, important in the development and employment of diatom monitoring tools for the Water Framework Directive. In this study, a nested design with replication is employed to investigate the magnitude of variation in diatom biomass, composition and Trophic Diatom Index at varying scales within a small chalk river. The study shows that the use of artificial substrates may not result in diatom communities that are typical of the surrounding natural substrates. Periphytic diatom biomass and composition varies between artificial and natural substrates, riffles and glides and between two stretches of the river channel. The study also highlights the existence of high variation in diatom frustule frequency and biovolume at the individual replicate scale which may have implications for the use of diatoms in routine monitoring.

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Effects of cadmium stress on periphytic diatom communities in indoor artificial streams

Freshwater Biology ◽

10.1046/j.1365-2427.2003.00980.x ◽

2003 ◽

Vol 48 (2) ◽

pp. 316-328 ◽

Cited By ~ 52

Author(s):

Caroline Gold ◽

Agnès Feurtet-Mazel ◽

Michel Coste ◽

Alain Boudou

Keyword(s):

Cadmium Stress ◽

Artificial Streams ◽

Diatom Communities ◽

Periphytic Diatom

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The most useful and commonly available acute rejection surveillance strategies are routine monitoring of myocardial function and donor-specific anti-HLA Abs monitoring

10.31219/osf.io/ebw68 ◽

2021 ◽

Author(s):

Moataz Dowaidar

Keyword(s):

Acute Rejection ◽

Cell Function ◽

Clinical Symptoms ◽

Contractile Function ◽

Therapy Monitoring ◽

Genomic Medicine ◽

Non Invasive ◽

Monitoring Tools ◽

Immune Mediated ◽

Routine Monitoring

Given the complexity of acute rejection (AR) pathogenesis and its vast spectrum of clinical symptoms, no methodology (invasive or non-invasive) can provide all the information needed to identify functionally and prognostically relevant AR, treatment selection, and therapy monitoring early. Only the use of EMBs in combination with non-invasive technologies and methods to detect subclinical changes in myocardial contractile function (e.g., TDI and STE), to detect alloimmune activation (e.g., IM assay, assessment of complement-activating donor-specific anti-HLA Abs (DSAbs), screening of circulating cfdDNA), and to predict the imminent risk of immune-mediated injury (e.g., assessment of complement-activating DSAbs).Searching for both ACR and AMR in all EMBs is a key prerequisite for accurate diagnosis and decision-making in individuals suspected of AR. Close non-invasive allograft surveillance to detect patients at high risk of AR, along with properly planned EMBs (depending on the particular risk profile of the patient), can improve AR surveillance while decreasing rsEMBs. Because rsEMBs are less prevalent after the first post-HTx year and largely symptom-driven diagnostic EMBs, ongoing development of comprehensive, non-invasive technology to monitor both ACR and AMR is of significant importance. This is especially helpful for detecting late subclinical AMR, which would otherwise go unreported.The most useful and commonly available AR surveillance strategies are routine monitoring of myocardial functions utilizing sensitive ECHO techniques (TDI and STE for acute subclinical dysfunction diagnosis) and DSAb monitoring. As a result, early and late use of HTx is strongly suggested. New IM technologies such as T-cell function assays and genomic medicine approaches such as GEP, circulating dd-cfdDNA screening and microRNA assessment are promising non-invasive monitoring tools for future clinical use, but it is still necessary to test the practical value of their individual or combined use for AR detection (including both ACR and AMR), not just for ACR.

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Impact of Acid Mine Drainage (AMD) on Water Quality, Stream Sediments and Periphytic Diatom Communities in the Surrounding Streams of Aljustrel Mining Area (Portugal)

Water Air & Soil Pollution ◽

10.1007/s11270-008-9900-z ◽

2008 ◽

Vol 200 (1-4) ◽

pp. 147-167 ◽

Cited By ~ 57

Author(s):

A. T. Luís ◽

P. Teixeira ◽

S. F. P. Almeida ◽

L. Ector ◽

J. X. Matos ◽

...

Keyword(s):

Water Quality ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Mining Area ◽

Stream Sediments ◽

Acid Mine ◽

Diatom Communities ◽

Periphytic Diatom

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Periphytic Diatoms in the Polluted Linggi (sensu stricto) and Kundor Rivers, Negeri Sembilan, Malaysia

ASEAN Journal on Science and Technology for Development ◽

10.29037/ajstd.12 ◽

2017 ◽

Vol 32 (1) ◽

pp. 60 ◽

Cited By ~ 1

Author(s):

I.S.A. NATHER KHAN

Keyword(s):

Species Composition ◽

Environmental Conditions ◽

Abundant Species ◽

Sensu Stricto ◽

Diatom Assemblage ◽

Artificial Substrates ◽

Nitzschia Palea ◽

Periphytic Diatoms ◽

Species Composition And Distribution ◽

Periphytic Diatom

The investigation in this paper aimed to describe periphytic diatom assemblage, species composition and distribution in tropical polluted Linggi (sensu stricto or s.s.) and Kundor rivers in Negeri Sembilan, Malaysia. Regardless of ecological and environmental conditions, diatoms were the numerically dominant flora among periphytic algae collected monthly over a period of 13 months at nine stations in the Linggi (s.s.) and Kundor rivers. The freshwater periphytic diatom samples were collected mainly using artificial substrates and supplemented with natural substrates. The periphytic diatoms thus collected from both natural and artificial substrates comprised 86 taxa (82 pennate and 4 centric forms) belonging to 21 genera. Of the 86 species, 71 species were found colonized in artificial substrates while the remaining 15 species were recorded exclusively on natural substrates. On the whole, the most common diatoms in both rivers combined were Eunotia vanheurckii, Gomphonema parvulum, Nitzschia palea, Pinnularia braunii, Navicula cryptocephala, Achnanthes saxonica, Achnanthes minutissima and Pinnularia microstauron. The most abundant species were E. vanheurckii, N. palea, A. saxonica, G. parvulum and A. minutissima.

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Rare diatom Stauroneis balatonis Pantocsek recorded in Lake Savsko, Serbia

Oceanological and Hydrobiological Studies ◽

10.2478/ohs-2019-0038 ◽

2019 ◽

Vol 48 (4) ◽

pp. 436-441

Author(s):

Ivana Trbojević ◽

Gordana Subakov Simić ◽

Jelena Krizmanić

Keyword(s):

Rare Species ◽

Littoral Zone ◽

Middle Miocene ◽

Artificial Substrates ◽

Ancient Lakes ◽

Diatom Flora ◽

First Finding ◽

Diatom Communities ◽

Distribution And Ecology

Abstract Although well represented in the fossil diatom flora throughout Europe and Asia, from the early-middle Miocene to the Quaternary, Stauroneis balatonis is considered a very rare diatom with a contemporary distribution limited to two ancient lakes – Ohrid and Prespa. The objective of this study was to describe the first finding of S. balatonis in Serbia in Lake Savsko and to update information on the distribution and ecology of this rare species. Periphyton samples were collected from artificial substrates incubated at three depths (0.5 m, 0.8 m and 1.4 m) in Lake Savsko and the epilithic community was sampled in the littoral zone. Samples were collected weekly in summer 2014, from mid-July to mid-September. Diatom permanent slides were prepared and small numbers of S. balatonis specimens were observed only in samples collected in September from artificial substrates incubated at the greatest depth (1.4 m). Our results significantly contribute to the information on the contemporary distribution and the ecology of this rare diatom taxon, especially considering the fact that S. balatonis specimens were observed in our study in diatom communities developed on artificial substrates and in an urban reservoir, i.e. Lake Savsko.

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Diatom indices in water quality monitoring of some South-Finnish rivers

SIL Proceedings 1922-2010 ◽

10.1080/03680770.1995.11900913 ◽

1998 ◽

Vol 26 (3) ◽

pp. 1213-1215 ◽

Cited By ~ 2

Author(s):

P. Eloranta ◽

K. Andersson

Keyword(s):

Water Quality ◽

Water Quality Monitoring ◽

Quality Monitoring ◽

Diatom Indices

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What's a river worth, anyway? A resource valuation survey of the Ohio river

Water Science & Technology ◽

10.2166/wst.1995.0562 ◽

1995 ◽

Vol 32 (5-6) ◽

pp. 63-70

Author(s):

A. H. Vicory ◽

A. K. Stevenson

Keyword(s):

Water Quality ◽

Water Quality Monitoring ◽

River Basin Management ◽

River Valley ◽

Political Support ◽

Ohio River ◽

Ohio River Valley ◽

Political Awareness ◽

The Individual ◽

National Significance

The Ohio River Valley Water Sanitation Commission (ORSANCO) is a government agency established in 1948 to control and abate pollution of the interstate waters of the Ohio River Valley. ORSANCO, represented by eight states of the Ohio Valley and the federal government, carries out water quality monitoring and assessment programmes, co-ordinates spill response activities, promulgates pollution control standards for the Ohio River, and co-ordinates the individual programmes of state and federal agencies. ORSANCO recognizes that public and political support are as important to effective river basin management as technical knowledge and activities. Because such support is so closely related to economic interests, ORSANCO and the National Park Service commissioned a survey project in May 1993 to compile readily available data to estimate the “value” of the Ohio River from several key standpoints. This information is intended to draw attention to the national significance of the Ohio River in its economic, cultural and natural resource dimensions, and to illustrate the magnitude of positive economic impacts to be realized by achieving water quality improvements. This project brought together for the first time information that will serve to enhance public and political awareness of the Ohio River Valley, and thus enhance support for aggressive environmental management.

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