Questions related to Ecotoxicology
I'm curious to understand how possible it is to bridge the gap between Data Science and Spatial Ecotoxicology in developing countries. Dearth of information and lack of data is a major setback in developing countries. It will be interesting to understand fully the intricacies involved and the way forward. Thanks.
What is the experience of researchers with male individuals of Folsomia candida in laboratory populations? What is their share in the total number?
I am currently evaluating the possibility of studying Culex pipiens in an ecotoxicological context by applying the dynamic energy budget (DEB) theory and effect modeling. For this, I am searching available life-history data of Culex pipiens to parameterize a standard DEB model. Specifically, I need length (or weight) data and egg numbers over time at different temperatures.
Does someone work with this species or know where to find growth and reproduction data measured over time?
Currently, microplastics (MPs) occurence researches in coastal and marine animals are performed in huge amounts, but their results concerning MPs abundances are not always given with the same unity.
- From what I can tell from studies I read, most provide data using MPs/individual. There are some studies that sample in pools, and then, after ending samplings, calculate the MPs/individual data. It would be an issue if we compare MPs/individual data of two different studies: one that sampled in each individual and another that sampled in pools?
- Should a specific study provide just the MPs/individual data? I think this study it would be sort of incomplete, considering that this data would not totally reflect the abundance of animals with different sizes, weights, and possibly ages, etc.
- What is the best approach between other unities, such as MPs/g of the whole sample, MPs/g of their dry or wet weight? That are some formulas to convert samples weight for dry and/or wet. This is applicable for MPs?
I know much of that depends on the study's biological samples, and objectives, but I would enjoy reading researchers opinion about it.
The term "micropollutants" is used in many scientific papers. It seems like chemicals of emerging concern are often thrown into the micropollutant box. But how can a pollutant be classified as micro if chemicals are all quite microscopically small!
Are the users of the micropollutant buzz word not as guilty as the "heavy metals" fans? Fortunately a few papers have spoken out against the misuse of the term heavy metals (E.g. Duffus 2002, Pure and Applied Chemistry 74(5):793-807). Will micropollutants have their turn as well? :)
Amphibians eggs are surrounded of a jelly coat constituted by one to several layers depending on the considered species. The composition of these layers depends on the considered layer and species. The functions of this layers are multiple. Indeed, the jelly coat is for instance known to be involved in fertilization, to avoid polyspermy, to act as a sperm chemoattractant and to play an important role of barrier against UV, infection and contaminants. But, the role of barrier against contaminants is not so clear. Indeed, the complex structure of the jelly coat provides to it an affinity to specific molecules. Therefore, certains molecules are stopped by the layers while others penetrate to the embryos.
In spite of this, most protocole for testing effect of toxicants on amphibians suggest to dejelly the eggs before the exposure. From my point of view, this recommendation lead to a loss of ecological relevance and I'm wondering if dejellying should not be reconsidered.
How about you ? Is there something that I don't see ?
I'm currently working on ecotoxicology and I'd like to know what my colleagues from the same area think, especially in South America. Too much of microplastics in my opinion, but few studies regarding their potential effect on the organisms (either continental or marine).
But what about the so-called emerging concern pollutants?? I believe they were left aside because of the microplastics... Which would be the main pollutants that will be our concern in a nearby future by the ecotoxicology? Let's start the debate! I bet nanoparticles...
Could you please introduce suitable references and reviews about the methods(any systems or organisms) for evaluation of the toxicity of organic micropollutants in WWTP effluent? and short summary how it happens?
Hi everybody: i am looking for recent datas about the amount of registered biocides containing silver nanoparticles. The most recent data i found is in this paper from Nowack et al. (2011) which explains that about the 53% of biocides registered at EPA contains nanoAg and the 7% of it contains AgNPs. I looked for more recent datas/numbers about biocides cointaining nanoAg/AgNPs, but from main sites like EPA's, REACH's and ECHA's or from the huge amount of papers i read nothing came out. I was wondering if someone has something (papers, reviews, sites etc..) to share with me to help my research. Everything is accepted but it must be referred to biocides containing nanoAg/AgNPs.
Thanks a lot to everyone who will share his/her time with me
Hello, Do you know where I can find any critics on ecotoxicological studies which are focused on exposure aquatic organism to drugs? I am looking for papers that critic actual exposure concentration of drugs.
Hi everybody. I am facing an issue about reproduction data analysis in chronic toxicity test with C.dubia. US EPA Method 1002.0 ( https://www.epa.gov/sites/production/files/2015-08/documents/short-term-chronic-freshwater-wet-manual_2002.pdf) instructions tell:
" The response used in the statistical analysis is the number of young produced per adult female, which is determined by taking the total number of young produced until either the time of death of the adult or the end of the experiment, whichever comes first. An animal that dies before producing young, if it has not been identified as a male, would be included in the analysis with zero entered as the number of young produced "
Including dead animals in the count gives me back too high standard deviation values which don't fit well in my analysis. I would like to know if alternatives are available: feel free to link me to other papers, works, methods etc.. which could help. Thanks a lot to anyone will spend time to help me.
I want to improve my knowledge on ecotoxicology/aquatic toxicology. Whereas there are many book available. Do you have a good recommendation? Thank you very much!
The question aims to know what types of species are most used in ecotoxicological tests of effluents from industries in the oil sector.
In the current EFSA Guidance on the risk assessment of plant protection products on bees (Apis mellifera, Bombus spp. and solitary bees) related to the Regulation (EC) 1107/2009 valid test methods for bees are in place. Beside bees (honeybees) several other pollinator groups are affected by pesticides and biocides such as lepidopterans or beetles. In order to improve the risk assesment for pesticides and biocides it is important to have a whole overview of exisiting guidelines beside the European regulations, OECD framework or the US EPA regulatory.
I would much appreciate if you could explain or suggest good research papers regarding the effects of ocean acidification on the chemical composition of the valves of mainly Mytilidae and Pectinidae species and damage, growth, development or biomarker assessment.
Thanks in advance
Dear Colleagues, we would be most grateful if you could complete this very short survey on Endocrine Disrupting Chemicals (EDCs). This survey is intended to inform the wider scientific community about the progress and impediments to endocrine disrupter research in invertebrates. We welcome views from those working outside invertebrate toxicology
Please follow this link https://forms.gle/tZAbHnhn6fArnAZR8
By participating you will be giving consent to your anonymous data entries being used as part of the survey. Due to the anonymous nature of this survey participation can't be removed. For further details on this project and how the data will be used please feel free to contact alex.ford(@)port.ac.uk [Please remove the () around the @]
I am Pr Abderrazak Kaaya professor of ecotoxicology in the faculty of IBN ZOHR university AGADIR (Morocco)
We have found some death fish in khnifiss lagoon (south of morocco)
We want to study the source of this observation
All samples are conserved at -18°C
We ask you if we can collaborate and if you can help us in this study
Thank youvery much
I have searched many papers for allowable concentration of Copper and Chromium in industrial wastewater but I didn't find anything useful.
I would be so grateful if you help me with this matter.
2nd Springer Euro-Mediterranean Conference for Environmental Integration (EMCEI 2019: www.emcei.net), 10-13 October 2019 in Sousse, Tunisia
1. EMCEI-2019 has now opened to receive submissions until 15 May 2019. 2. Accepted papers will be published in the proceedings by Springer before the conference. 3. EMCEI-2017 proceedings by Springer was indexed in Web of Science (ISI). 4. Best extended papers of EMCEI-2019 will be published in Springer journals after the conference. 5. More details at: https://www.emcei.net/
It is often easy to measure effects of chemicals on organisms using various endpoints. However, chemicals can also influence ecosystem services. How can we measure effects of chemicals on ecosystem service delivery using ecotoxicological approaches? Any functional frameworks?
Recently we got a review of a manuscript saying that "data did not follow dose-response patterns". I know about linear models of response, as well as log-logit and probitos-like distributions. However, I was wondering should all biological responses fit in those models?
I am a Masters Student of Ecotoxicology at University of Koblenz-Landau Germany. I am entirely new in this field and gradually developing interest in aquatic ecotoxicology. I will remain grateful to receive materials that will help me develop in this area of interest. Thanks.
Is it possible just comparing only the element concentration in biota and sediment, excluding the TOC and lipid?
I have a long term dataset which includes a variety of chemical and physical water variables sampled from an inland river. These variables include: metal loads (Al, Ca, Cd, Cu, Fe, Hg, Mg, Mn, Na, K, Pb, Ni, Zn); in Situ measurements (Electrical conductivity [EC], water temperature, air temperature, dissolved oxygen, pH); water nutrients (Ammonium, Chloride, Nitrate, Phosphate, Sulphate, Total Organic Carbon [TOC], Dissolved Organic Carbon [DOC]); and others (Acid capacity, base capacity). Some of these variables (e.g. chloride, EC, ammonium, nitrate, dissolved oxygen, phosphate, pH, sulphate, TOC and water temperature) were sampled consistently and therefore have a good resolution, whereas others (e.g. metal loads [Al, Cu, Fe, Hg, Pb, Ni, Zn], acid capacity and base capacity) were sampled less frequently and therefore do not have the same data resolution.
With that said, the focus of my research is not exactly the chemical interactions of DOC and other chemical constituents per se, but rather the interaction and effect of DOC on freshwater macroinvertebrate taxa. I do, however, understand that the interaction of DOC with other water chemical properties is of vital importance and ones needs to consider these interactions.
Therefore, I would like to know what variables (from the lists mentioned above) are the most likely to interact with DOC within the freshwater environment. This will aid in my selection of the relevant variables that I will carry into further statistical analyses.
Any help in this regard would be greatly appreciated.
I am doing my research on wetlands especially ecotoxicology aspect. Please suggest some peer reviewed journals which do not charge for processing and publication.
Scientific progress depends upon the proper dissemination of results and can only be fully achieved when access to the broad picture of the scientific knowledge is provided. Notwithstanding, there is a concerning low publicity of null results (i.e. findings do not support the experimental hypothesis), controversial data that could not be predicted according to current theories, and methodological "failures" due to lack of standardized procedures. Researchers tend to communicate more results with statistically significant differences, and negative results are often considered not "publishable" by authors, journal editors, and peer-reviewers. Null results should not be regarded as no results especially in environmental science. Well-grounded assessments on possible pollution sources that were found to not contribute to environmental contamination, ecotoxicological tests that could not detect toxicity under certain circumstances, or expensive analytical methods that are not particularly more efficient than cheaper options constitute very relevant information for improving strategies on environmental management, policy, and research practice. If you have found this kind of result, your results are relevant to our session that might take place at SETAC Europe Meeting (Rome, 2018). Submissions are welcome until November 29th 2017.
Metal nanoparticles are showing promise in tackling different problems in different domains of environment. How they can be used in aquatic ecosystems? What are different likely interactions? What may the possible toxic effects on different ecosystem components (planktons, bacteria, macrophytes and fish)? How can we track the ecotoxicological linkages? How could we manage metal nanoparticles for positive (beneficial) uses and avert the adverse/untoward consequences?
RG friends and researchers you all are welcome to participate and help to promote a sustained brainstorming on pros and cons of apllyting metal nanoparticles in aquatic systems like, ponds, lakes, rivers, etc.
I'm looking for data regarding ecotoxicological parameters (EC50, LC50) expressed as INTERNAL BODY CONCENTRATIONS for the metals CD, Zn and Pb to Enchytraeids and Eisenia andrei species. If someone knows some papers in which this work has been done I would appreciate it. Thanks in advance!
Most of the cases, various metals having species and their toxicity varied largely; so how we can quantify the effect of these metal species on other metal present in soil system.
what these parameters imply in surfactant chemistry? and what are the methodologies for it?
I have observed these two parameters being used in the quality assurance of certain ethoxylated alkyl phenol formaldehyde resins.
I need to analyse plant rinsate for analysis of heavy metals as part of a Mine spill contamination project. Do we have any standard protocol for plant rinsate analysis?
I'm looking for microcosm design that can be used in running water in the field, that can house some macroinvertebrates and substrate.
I'm trying to determine heavy metal speciation in food samples (vegetable, meat and seafood) by HPLC-ICP-MS. I am not sure about effective method to digest each kinds of sample. plz help me...
Hello, I am trying the evaluate the toxicity of Zn to freshwater microalgae P. subcapitata with a 72h toxicity test. I was wondering if I should add EDTA in the test medium or not. The obtained results will have to be compared with those obtained with natural water containing Zn.
Can the presence of EDTA alter the bioavailability of Zn?
Can this influence the comparison with results obtained in natural water?
Hello everyone, I am studying the behaviour of nematodes against heavy metal toxicity. I want to perform comet assay, but finding it difficult to optimize the protocol. Although, in C. elegans comet assay has been reported with exposure to BPA, but, I can't find a protocol where nematodes are exposed to toxic metal-containing pollutant under a natural environment in presence of multiple elements. If anyone can suggest a method for the experiment, I remain grateful!
I am working on heavy metal contamination of soils at mechanic site and i need international, regional and even national permissible limit of the metals am working on
I'm staining fish blood smears and searching for micronuclei. I have seen methods that have only used a 6% Giesma stain solution in Sorenson's buffer (Nwani et al. 2011). I've also seen slides being stained initially with a May-Grunwald Stain and followed by a Giesma stain solution, but I was wondering if it was necessary to stain initially with May Grunwald Stain. I've already stained my slides with a 6% giesma in Sorenson buffer solution at a pH of 6.9 for 45 minutes, however I'm struggling to see the micronuclei. Additionally, if the May-Grunwald stain is needed, can I put my slides back in methenol to strip the stain from the cells and start over? Any insights on my methods would be greatly appreciated. Thanks!
Toxicity values for Ni on Coastal and marine organisms especially diatoms and copepods from coastal waters of India through toxicological bioassays
I have attached a photo of the aphids. They are located over vallisnelias, amazonias, elodeas and many other aquatics.
Nanotechnology is being promoted as a new generation environmental remediation technology with immense potential to provide cost-effective solutions to many of the most challenging environmental cleanup problems. Silver,copper, gold, iron oxides, titanium oxides are some of the commonly used nanoparticles (NPs) that can be used in environmental remediation. Further, nanoparticles can be used as selective and sensitive sensors to monitor toxins, heavy metals and persistent organic contaminants (POPs) in soil, water and air environments. But there appears pitfalls in the horizon! Toxicity issues have raised important environmental concerns. Although we need to make a trade-off but scientist are hopeful about benefits of this new "magic bullets", which far exceed their put-down-able drawbacks.
My partner and I are working on determining the efficacy of the jade vine (Strongylodon macrobotrys) as a soil pH indicator in rain forests where this plant is most commonly found. We are then trying to formulate the criteria for determining its efficacy.
This common aquatic plant is known to have heavy nutrient uptake. In an aquatic ecosystem, is the accumulation of certain nutrients in the hyacinth sufficient to determine the state of said ecosystem with regards to pollution?
Can any body please suggest some literatures describing the bio-available proportion of metal from contaminated/polluted soil to animals (e.g., Bivalve mollusc/polycheate etc.) ....Advance thanks due to your kind cooperation.
I am interested in literature documenting massive die off due to algal poisoning from different cyanobacteria species ( Microcystis sp., Anabaena sp., etc) of herons, pelicans, ducks. So far I am aware about some papers relating the deaths with poor water quality. I am more focus on cyanotoxin contamination in tissues, lethal dose and so on. Any feedback will be highly appreciated.
The Daphnia magna toxicity test of silver nanoparticles always chooses moderately hard water from EPA. But from EPA the the culture media of Daphnia magna is hard water. I have no ideal for choose the test media. Could you give me some suggestion ?
Numtogenesis means nuclear occurrence of mitochondrial components...after the exposure of pesticides....Thanks
Can anyone help me with detail information on how macrophyte and phytoplakton can be use simontaneously in assessment of the ecological state of aquatic environment. what statistic can be use to present the result and what parameters i can use for the monitoring method? is it neccessary to analyse the plants for heavy mental too?
currently, I am now conducting my research for my final year project. the title is a biogeochemical exploration of a gold deposit in Sokor, Tanah Merah, Kelantan, Malaysia.
1) firstly can someone give me an idea about the species of plant that can be an indicator for a gold deposit which suitable with the climate here?
2) secondly about the method. can some give a clear explanation about the sample preparation and digestion for plant and soil sample?
I already know that blubber is the best tissue to analyze to invastigate on these pollutants.
I was unable to find papers showing results of contaminants in cetacean skin.
The goal of my question is to know if it is relevant to explore that tissue and see if there are some issues in analyzing hydrophobic contaminants in cetacean skin.
Does anyone here work with wild mice (mus musculus)? I would like to know how to determine the age of these animals? Lens eye weight? Currently I am using the fresh body weight, but this methodology is frequently refuted by several paper reviewers. Thanks!
Please can you help me to find Standard and guidline of the permissible limits of toxic heavy metals (copper and silver) in sediment, bivalve and sea water ?
Thx in advance
OECD medium is the standardized tool for soil toxicity studies. Usually sphagnum peat was recommended as ogranic matter for OECD medium. I recently read in an article about the modified OECD medium. I can't catch it in the OCED website. Thus asked the question
Bioturbation is the soil/sediment reworking by animals. It has a definite role in ecosystem engineering too by modifying and modulating different physicochemibal transformations and biological/microbiological interactions. Toxicants' transfers may be affected and ecotoxic effects may be modified. Can bioturbation be manipulated in reducing toxic effects of some toxicants and how?
We are planning on developing a project on potential use of fly ash generated from thermal power plants. It has both a number of potentials and pitfalls for use in aquaculture. There is risk of a number of environmental risks especially heavy metal contamination. It used in fish pond there will be risk of transfer of contaminants along the food chain. How the project's aim and objectives can be drawn, the technical design and work plan can be made. Above all, how the pre-application treatment of fly ash can be thought for removal and inactivation of heavy metals and other toxic contaminants.
Can anyone please suggest me some of the suitable SCI (Science Citation Index) Journals, which publishes paper rapidly pertinent to "Distribution of Heavy Metals and Contamination Assessment in the Water Environment of Coal Mining Area”.
I would like to know what actually cause some benthic macroinvertebrate sensitive toward pollution?
I read that they required high oxygen to sustain and some pollution could damage their gill. Is that what actually happen?
I am planning on investigating the impact of the use of pesticide treatments on the trophic web ‘cultivated plant/phytophagous insect/parasitoid’, and I reckon it would be much more realistic to directly test commercial formulations. But I need to know if there is any restriction to the testing of commercial formulations.
I am just looking for some toxicology protocols using Acartia tonsa as their bioindicator. Does anybody have Parcom or APHA 1992, or ASMT protocols too? I would appreciate! Because I need some details of their methodology!