Restoration - Science topic

Hundrends of millions have been invested in this feat, after some initial promise such as the Ashtekar's reformulation of GR, the Wheeler DeWitt equation etc (i. E. 100m to a research Group baseb on Imperial college, UK in early '00s).Reseasrch however cumilated to weird theories such as Loop Quantum theory that lost traction by the early'2020s.

Now research is based on 3 premises

GR focused

** diffeomorphism invariance (aborting the meaning of some SR results)

** shape dynamics

QM focused

** restoring locality if the wavefunction update if seen as physical process

Share your experience in restoration, restoration of ecosystems, special interest in high mountain systems. Particular interest in the work, methods of implementation and the results obtained.

Ecotechnology is an emerging science that focuses on applying ecological knowledge and environmental skills to attain sustainability in human developmental progress. It enables human activities to adapt more skillfully to natural ecosystem functions. It involves cross-disciplinary studies of nature, and basic sciences, especially blending ecology, biology, and technology. The emphasis is to avoid ecological and environmental damage in all human activities. Accordingly, it summarizes all the sustainable engineering models for preserving, restoring, and conserving natural ecosystems to make developmental progress accessible through generations. In simple terms, ecotechnology enables humans to protect biodiversity, and soil health, achieve sustainable agriculture, eco-friendly energy sources, food safety, and all other means to manage sustainable development. Therefore, the primary objective of Ecotechnology is to make human life happy forever through proper monitoring of natural ecosystems while employing innovative technologies and novel ideas for progress and development.

Thinking of writing an review article about forest restoration. Any ideas or suggestions on that will be most appreciated

The technological advances taking place are contributing to the improvement of computerized analytical techniques implemented on large data sets. The development of technological solutions typical of the current fourth technological revolution, including the improvement and creation of new generations of ICT and Industry 4.0 information technologies, makes it possible to carry out multi-criteria analysis and simulation and forecasting models carried out on large sets of information and data. Such analyses are carried out using computerized analytical tools including Big Data Analytics in conjunction with other Industry 4.0 technologies. When the aforementioned analytical tools are enriched with Internet of Things technologies, cloud computing and satellite-implemented sensing and monitoring techniques, the possibilities for multi-criteria analytics of large areas, e.g. nature, climate and others in real time conducted using satellites, emerge. When artificial intelligence technology, machine learning, multi-criteria simulation models, and digital twins are added to these analytical and research techniques, opportunities arise for creating predictive simulations for multi-factor, complex processes realized in real time. These can be complex multi-factor natural, climatic, ecological processes, etc., and concerning changes in the state of the environment, environmental pollution, changes in the state of ecosystems, biodiversity, changes in the state of soils in agricultural fields, changes in the state of moisture in forest areas, etc. caused by civilization factors. In view of the above, new ICT information technologies and Industry 4.0 can also help monitor the state of the environment and protect the tropical Amazon rainforest and other areas of forests, green areas.

In view of the above, I address the following question to the esteemed community of researchers and scientists:

Please answer,

I invite everyone to join the discussion,

Thank you very much,

Regards,

Dariusz Prokopowicz

The Amazon Tropical Rainforests are referred to as the 'lungs of our planet'. The Amazon Tropical Rainforests and other highly biodiverse natural boreal areas are one of the key factors in removing CO2 from the atmosphere and are thus a limiting factor for greenhouse gas emissions, slowing the rate of progressive global warming, reducing the scale of the ongoing climate crisis. The tropical rainforests of the Amazon and other highly biodiverse natural forests and other natural green areas are a major reservoir of terrestrial biodiversity. In some but unfortunately still few countries and urban agglomerations, the scale of aforestation exceeds that of forest deforestation. Unfortunately, this does not apply to the tropical rainforests of the Amazon and many other natural forests of the tropical and subtropical zones. It is essential for the future of future generations of people, the state of the biosphere and the planet's climate to protect the state of biodiversity in the natural ecosystems of the tropical rainforests of the Amazon and other natural forests and to convert deforestation processes into aforestation. The state of biodiversity of the planet's biosphere and the rate of progressive global warming depend to a large extent on this. It has therefore been a common knowledge issue for many years to significantly increase the level of nature conservation, including the protection of the biodiversity of the tropical Amazon rainforest and other natural forest and natural ecosystems. It has also been a matter of common knowledge for many years, confirmed by many scientific studies and published scientific papers, that the processes of deforestation of the tropical Amazon Rainforest and other natural boreal, forest formations of the planet must be urgently converted to processes of aforestation. This, if it has been common knowledge for years, is why deforestation processes still dominate many times over aforestation. This problem was already signalled by researchers and scientists in the second half of the 20th century. Unfortunately, large-scale deforestation of the tropical Amazon rainforest and other natural forest formations of the planet continues. In addition, over the last 15 years the scale of deforestation of the Amazon rainforest and other natural forest formations of the planet has increased instead of decreasing. At the UN climate summit COP26, many countries pledged that by the end of this decade at the latest, i.e. by 2030, deforestation processes would be significantly reduced to such an extent that aforestation processes would prevail. But why should we wait until 2030 for this when we know how important this is for the preservation of the planet's biodiversity and for the urgent issue of halting or slowing down the progressive process of global warming. The improvement of conservation techniques and the development of aforestations programmes is fostered by the society-wide pro-environmental awareness of citizens, modern technologies, available financial resources, scientific knowledge, etc. So what is missing, what still needs to change. Is the key problem still the lack of changes in politics and business, i.e. the necessary changes towards pro-environmental and pro-climate reforms, the development of a real environmental policy and environmental protection, the implementation of the concept of sustainable economic development, the realisation of sustainable development goals, the pursuit of sustainability of the development of civilisation with the surrounding nature and climate, the carrying out of a pro-environmental and pro-climate transformation of the classic, dirty economy of excess towards a sustainable, green economy of moderation, a closed loop economy?

In view of the above, I would like to address the following question to the esteemed community of researchers and scientists:

What do you think about this topic?

What is your opinion on this subject?

Please answer with reasons,

I invite you all to discuss,

Thank you very much,

Warm regards,

Dariusz Prokopowicz

Achieving acceptable dental restorations requires efficient communication between dentists and dental technicians.

Mosaic maintenance and restoration has witnessed many experiences and expertise over 50 years, as many materials and techniques were relied upon, but there are many of them that negatively affected the mosaic and affected it undesirably. Giving solutions helps to ensure a very appropriate restoration of the archeological mosaic.

I have watched a number of videos of people restoring rusted objects. They use a range of methods including physical methods: scraping, sanding, and grinding along with various chemical/electrochemical methods. But can the metal be heated to remove rust? I know rust is caused by oxides. The issue is that when you use these methods they are destructive (some are less destructive) but some material is lost. I have seen some objects heated to retemper the metal. I am sure if I look hard enough I can find an answer. Of course, heating objects can also be destructive as well. Any thoughts?

I have been working on Restoration Plan for the Eastern Grid of Bhutan. this project focuses on restoration procedures in case there is a total blackout in the system. I have been studying the frequency in each restoration step. however, I have not been able to plot the active power generated by each of the plants.

How can groundwater affect forest Restoration/ aforestation?

I am working on a 33 bus distribution network and I am trying yo maximise the number of critical loads restored and am using Dist flow for my power flow studies which I incorporated as one of the constraints but i cant seem to get the constraints formulated correctly in MATLAB

We are looking for any reference that tested sowing all seed in a single year versus sowing the same total amount of seed but spread across several years (e.g., plant 1/3 as much seed over each of 3 years, and compare success to all the seed planted in 1 (or each) of the 3 years), particularly in a revegetation/restoration setting.

Hi Researchers,

I would like to start my PhD studies based on Environmental engineering and science. Therefore I need to prepare an effective research proposal as a part of finding my appropriate supervisor. I would like to get suggested topics from you all in one of my following research areas:

1. Renewable resources (materials/energy) at construction or agriculture

2. Green roof technology.

3. Water quality conservation and restoration

4. Life cycle assessment

Since most of the readers of this discussion are well experienced researchers than myself, I would like to keenly here every suggested topics from your sides. Please allocate some time for this discussion and let me know some valuable topics. Thank you.

Shuraik

I have been into the topic of restoring dead old dry batteries with sulfuric acid rather than replacing the battery with a new one to save some money. But I have my doubts to the practicality and the feasibility of this method. So, to the people of specialty and experts, is this method recommended practical wise and financial wise compared to replacing the dead old battery with a new one?

What are some good books (both new or classics) on community ecology and restoration ecology, which can be helpful to build concepts for a PhD? (My specific field of study is ornithology)

Discuss the impacts of local and global change challenges on Forest Landscape Restoration

1.Climate Change

2.Food Security

3.Biotechnology and Synthetic Biology

In the field of sports science, the recovery umbrella is a trending topic, and even more so in the world of elite sports. This is evidenced by the significant increase in scientific publications during the last 10 years as teams look to find a competitive edge. Recovery is recognized to be an integral component to assist athlete preparation in the restoration of physical and psychological function, and subsequently, performance in elite team sports athletes. However, the importance of recovery in team staff members (sports coaches and performance staff) in elite sports appears to be a forgotten element. Given the unrelenting intense nature of daily tasks and responsibilities of team staff members, the elite sports environment can predispose coaches to increased susceptibility to psycho-socio physiological fatigue burden, and negatively affect health, wellbeing, and performance Therefore, the aim of this opinion was to (1) develop an educational recovery resource for team staff members, (2) identify organizational task-specific fatigue indicators and barriers to recovery and self-care in team staff members, and (3) present recovery implementation strategies to assist team staff members in meeting their organizational functions. It is essential that we do not forget the coaching and performance staff in the recovery process.

Our university project group is studying the possibility to apply a plan for the (local) restoration of ice based habitats of polar bears (Ursus maritimus). Has the idea already been developed in some way?

Hi!

Please tell, does anyone know where to find information on the method of calculating the cost of an hour of work of a restorer or conservator? I've been looking for such a methodology for a long time, but unfortunately I can't find anything.

Thanks in advance for the reply!

Soon I will be writing a paper on IMPAIRED Folate-mediated One-Carbon Metabolism (FOCM) in COVID-19, and I will be needing input from a vast array of scientists and researchers who are interested in this field of study. Please feel free to introduce questions and thoughts regarding this topic of importance in restoring the FOCM in COVID-19 patients. I am looking forward to your thoughts and opinions and questions.

Sincerely with gratitude,

Melvin R Hayden

University of Missouri School of Medicine

In patients having congenitally missing maxillary laterals, the orthodontist wishes to keep a space,that could be restored later. How can we determine the space required?

I see a similar issues encountered by other. Can anyone help answering. Thank you.

My hyperledger fabric network consists of 1 orderer, 1 organization and 3 peers. I tampered ledger of first peer and then tried to do another transaction on the same peer, then the following error was thrown:

"Error: deliver completed with status (SERVICE_UNAVAILABLE) before txid received - proposal response: "

But the transaction was executed and also the block was added in tampered ledger of peer. But the tampered data was not restored to previous state.

With the reference of the answer in this link - "https://intellipaat.com/community/17752/in-hyperledger-fabric-blocks-locations-and-validity-criteria", I came to know that if the tampering is done, "the state database can be dropped and rebuilt from the blockchain".

So this process of dropping and rebuilding the database is done automatically by peer or we need to do it manually?

In short, if tampering is done in ledger of peer, how can be the previous state of ledger restored?

Assume that the current coral cover is between 20% and 30%, down from 40% over the past 10 years and that the restoration project can be funded for at least 10 years.

Churches of the restoration faith are some of the complex churches because they do not have a specific doctrinal tradition like Catholicism, Methodism, Presbyterianism etc...they emphasise restoring the church to its pristine forms. It however has borrowed from the Calvinistic traditions and has embedded traditions in its teachings. These traditions have been overcrowded by different practices - the churches are like a court with multiple centres. The centre of the court can no longer be identified. Churches now clamor for unlearning their practices to relearn the traditions. Therefore the question is, How best can the churches of the Restoration faith unlearn their practices to relearn their faith traditions?

We need your help to evaluate a deep learning model for audio restoration. Please fill in this survey (it only takes 20 minutes) or share it with your network. https://lnkd.in/gYY-32P Thanks a lot.

Date mussel Lithophaga lithophaga populations restoration project

I am interested in measuring if there has been an improvement in plant health in an arid ecosystem that has been restored by active planting of the dominant species that was over gazed and ultimately removed completely from some areas in the ecosystem. The species was reintroduced by active planting around 10 years ago and has reestablished well, about 1/3 of what I would consider similar to natural density. These planted areas include various additional "remnant" species from the original ecosystem and I would like to compare traits within species across degraded, restored, and natural conditions, but I'm not sure which traits would be the best to explore. What I have off the top of my head is' specific leaf area (SLA), flower/fruit set, stem/leaf water content, but I need more as the difference might be subtle.

Please suggest other traits that I can read up about.

Thanks and best regards,

Nicholas

Of course, in the long-term perspective rewetting of peatlands has the potential to fulfil the multiple restoration goals including those targeting on climate, water, and species protection. However, in particular if long-term drained and agricultural used sites are rewetted often shallow lakes are formed due to peat loss and soil shrinkage. Such inundation could be problematic if areas are affected which still have a higher conservation value due to occurrence of rare orchids or butterflies like Euphydras aurinia. Such a case seems to be an exception but indeed such remnants can be occasionally found in larger drained riparian peatlands located in depressions or other areas which were less affected by drainage measures. Is there any publications available reporting on (non-intended) negative consequences on biodiversity due to rewetting measures?

If I don't have aesthetic concerns, I prefer glass ionomer (Equa forte). I use bulk-fill composite in deep cavities. So, you?

I am seeking the best current methods and datasets (highest possible resolution) for defining and assessing global land degradation - ideally with a time series. I know there are different ways of exploring this e.g. biomass, productivity, land use/cover etc., but I would appreciate any thoughts on current modelling, datasets/resources and novel approaches.

I am also interested in the best methods for quantitatively mapping/modelling land restoration (biophysical) on a global scale, and if possible, historic land reconstruction.

Thanks!

The notion of Weighted Usable (habitat) Area (WUA) in aquatic environments stems from Ken Bovee's technical report on the Development and evaluation of Habitat Suitability Criteria for use in the instream flow incremental methodology from 1986. The method builds on the evaluation of a Habitat Suitability Index (HSI) that ranges from 0 to 1, but is not a probability. Because of the value range of HSI, it is sometimes confusingly used as a multiplier to calculate usable habitat area from two-dimensional (2d) numerical model output. The outcome of this approach is a notion of m²-Index and not m², which is strictly speaking a non-sense unit. To overcome the use of confusing units when HSI is used with spatially explicit 2d models, we use in our River Architect software (https://riverarchitect.github.io) a threshold value as on-off trigger to define if a pixel's area counts as usable habitat or not. Other commercial software, such as CASiMiR, use fuzzy sets to overcome some challenges, but eventually come back to a per-pixel association of habitat area. To this end, habitat assessment is complex and should account for multiple target fish species and their lifestages. For instance, the preferred habitat of juvenile trout differs significantly from that of adult trout. In a nutshell, there are many options and nearby every country has defined own standards for snapshot-like habitat assessment in public projects.

This is why I am addressing the following questions for an open discussion and experience reporting to the community : How do you assess habitat in rivers? How do you account for changing habitat preferences among target fish species and/or lifestages? Ultimately, how do you deal with competing habitat requirements in river restoration design, when the blurry overall goal is to "improve habitat conditions for indigenous species"?

Hello all,

I am looking for ways to compare recharge of groundwater and determine if precipitation has more of an effect on groundwater levels before or after restoration? My data set contains a time series of groundwater levels and precipitation. I want to determine recharge from my groundwater levels and then compare those recharge amounts before and after restoration to precipitation. Can I do this with simple correlation between precipitation and recharge amounts and determine that the scenario with the highest correlation is the most impacted by precipitation?

TIA!

I am writing research on the consequences of psychosocial deprivation of adolescents (the situation with сovid-19) and the possibility of restoring the psychological potential of adolescents

I am writing a underclassman research report on the Step Pyramid and want to know about any modern archaeology work going on there since the Pyramid was restored.

One of the principal objects of restorative justice is focussing the restoration. Although debate about the subject matters of restoration is not recent, it has been continuing since 1970s. What is your thought about it?

I need PCR based markers related to fertility restorer genes in R-line of rice hybrid, fertility maintainer genes in B-line of rice and cytoplasmic male sterility genes related markers in -line.

Is there any quantitative study on Biodiversity restoration during COVID-19 lockdown?

Has anyone been able to successfully cryopreserve coral oocytes? I've only found one case for a Gorgonian (Junceella juncea) through vitrification (Tsai et al. 2015, attached below). I know that in some cases some researchers (personal communications) have been able to thaw and retrieve from liquid nitrogen, but though they are still 'alive', they loose their ability to be fertilized (infertile).

I appreciate your help providing me with your answers and/or experience in this matter.

Ha logrado alguno críopreservar exitosamente los ovocitos de alguna especie de coral? Solamente he encontrado un caso para una gorgónea (Junceella juncea) por medio de vitrificación (Tsai et al. 2015, adjunto abajo). Se que algunos investigadores (comunicaciones personales) han logrado en algunos casos descongelarlas y reactivarlas después de realizar las inmersiones o el almacenamiento en nitrógeno líquido, sin embargo, pese a que los ovocitos salen 'vivos', estos pierden su capacidad de ser fertilizados (quedan infértiles).

Agradezco de antemano su apoyo y colaboración compartiendo sus respuestas y experiencia en este asunto.

https://www.researchgate.net/publication/277881464_Development_of_Cryopreservation_Techniques_for_Gorgonian_Junceella_juncea_Oocytes_through_Vitrification

G cem an aesthetic resin cement is a valuable source of cementing extracororonal restoration, due to its strength I have used it for core build up in many cases the results were awsum, am I on a rite track??

Dear Network,

I’m looking for case studies of depaving / transforming built areas (parking lots, constructions, roads) into green spaces or urban natural habitats. I'm looking for a range of examples, from ecological engineering to passive restoration or urban spaces that have spontaneously evolved from asphalt to brownfields / spontaneous natural habitats

Have your heard about such examples around you ?

Many thanks,

Marc Barra

Ecologist

Paris region Agency for biodiversity

What are the ecosystem functions we measure in order to say an ecosystem has been 'restored'?

Hi computational photography and vision researchers,

I've been interested in this category of problems in a specific setting and I'd like to have a sense of the broader fields with relevance. Is there any work on image restoration or image enhancement that the image is not only optimized for better visual quality, but also towards better CV tasks such as object recognition?

Any pointer would be appreciated!

Are you aware of any publications that map reef restoration initiatives around the world?

I am trying to restore an extensional 2D interpretation. I can start by hand, but I was wondering if there were any digital options out there.

In our article, we described that the curve of spee (the baseline of upper teeth) was regularly in one common curved plane with the occiput (page 4,5;8 in ). From the side, the very line attaches the baseline of upper teeth exclusive teeth 17, 27 and 18, 28, where the line runs below their baseline.

We observed the common plane even in case of baselines of upper teeth the positions of which had been changed significantly by dental restoration. Nevertheless, they were in one common plane to the occiput, which obviously remodeled its position to the head. This served to position the occiput in the same way as the baseline of upper teeth.

However, we only used 70 cases. so an EbM investigation with 200-500 medical images of head and neck is needed.

Benefit: Insight into the dependency and the mechanism between teeth and posture. Focusing the baseline of upper teeth as parameter that influences posture.

May be a doctorate.

Thank you and best regards.

Since I am working on saltmarsh restoration project in Bangladesh I want to conduct collaborative research with you to enrich my knowledge in the respect field of study.

Which one would be more efficient in curbing the SARS-COV-2 virus: developing vaccine for the SARS-COV-2 virus, or restoring the innate nonspecific immunity by curing a person’s latent or symbolic metabolic syndromes? Children have a weak immune system, yet they are more healthy without any co-morbidity, so their innate nonspecific immunity is sufficient in coping with the SARS-COV-2 virus.

Are me there any recent papers or articles outlining the latest plans of Cen-SAD / African Union for restoration, renaturation and afforestation of the Sahel Great Green Wall that you could refer to? - Thank you!

Best regards, Lorenz Huebner

Dear all,

I have been searching through the literature for examples of possible impacts on biological communities of interventions targeted at restoring / stabilizing landslides. I found just a few studies focusing on plant/invertebrates. I wonder whether there are no works about the potential impact of landslide restoration/rehabilitation on other animal groups/species (I'm particularly interested in birds), or I missed something...

Any hint would be much appreciated!

Thank you in advance.

Mattia

I am currently in Malaysia. Last month, exactly on April 12th, we observed an abrupt change in the gravity acceleration measured at the base station. Our two autograv-5 instruments measured an abrupt increase in the gravity measured by about 2 mgals. the successive measures show restoration to the previous values before the change. I wonder whether any global phenomena could be the reason for this?

This will help us to know heavy weight metal ion analysis of natural teeth and prosthesis or restoration

What are the main challenges in transitioning from the emergency to the restoration of local healthcare and how do Field Hospitals help or hinder this?

I want to know more about the advantages and disadvantages of NRCT

How to choose a community that would be a candidate for restoration in certain region, and create a community model that addresses the questions regarding composition, interactions, structure, and dynamics ?

Fast changes in socioeconomic and environmental condition of forest restoration areas need a fast problem solving method. But step by step experimentation in scientific problem solving methods wastes a lot of time, specially when our selected planting materials are slow growing trees.

there is a lot of variation between the tooth preparation guidelines for zirconia restorations.

What are the evidence based guidelines to prepare a tooth adequately for zirconia crowns? both in the anterior and posterior regions of the mouth? depth of finish lines and their geometry?

Please reply

I invite you to the discussion

Thank you very much

Best wishes

What materials are used to restore concrete in roofs and columns?

Caries traditionally has been primarily treated by removing using a rotating bur and restoring the produced hole with a suitable restorative material. Evidence suggests that digging and filling not only makes the under-treatment tooth weaker but also fails to stop secondary caries.Contrarily, sealing of caries as well, has been found effective to stop caries progression. I wold like sharing of views.

I am currently providing advice on the restoration of an 80km long back-barrier coastal lagoon (wave driven, with limited seawater / river water interchange at its northern extremity). The lagoon has experienced restricted flows, a build up of organic matter in the sediment, extensive anoxia and a near-permanent cyanobacterial bloom.

A number of potential solutions are in the table, including increased input of drainage water, an artificial seawater intake, increased riverine flows, dredging and liming.

While I have a few examples where restoration of similar systems has occurred, I would really appreciate having a few more, if anyone has any ideas?

Thanks heaps.

Is there any clinical or in vitro evidence to suggesta benefit from restoring the full buccal surface of abfracted teeth with an indirect restoration?

In other words, if a tooth needs cuspal coverage for structural reasons, and there is a buccal abfraction, is there any reason to prepare the buccal surface other than esthetics? Could the effect of bonding the cervical area to the occlusal possibly outweigh the loss of stiffness related to removing the buccal enamel?

Jan W.V. van Dijken, Ulla Pallesen, Ana BenettiIn Press

Significance

The use of the AB restorative in Class II cavities, applied as instructed by the manufacturer after a short phosphoric acid pretreatment but without adhesive system, resulted in a non-acceptable very high failure frequency after a one year period

link: /www.sciencedirect.com/science/article/pii/S0109564118306146

In a recent review we attempted I was amazed to find very few restoration examples in rivers in the southern Balkans (south and southwest of the Danube basin). Could anybody help us in finding such examples? (i.e. riparian restoration, de-daming, fish-passes, eco-flows, re-connectivity works, urban river restoration, wildlife habitat enhancment, rewilding rivers, nature-based solutions, anti-pollution technologies, re-introduction of threatened species, etc).

I studied the effect of green fertilizers (siderates) on the restoration of organic matter of the soil. It turned out, that such a siderate as radish oil (Raphanus sativum d. Var. Oleifera Metrg.) quickly mineralizes and practically does not affect the increase of the labile pool of soil organic matter. Are methods known to slow down the process of mineralization of the green mass of such siderates?

Ceramic is always shrinking.how this shrinkage is compensated?

Paintings restoration using image processing

Dears,

I developed a travel cost model comparing data which was collected before and after an ecological restoration. The aim is to determine if the restoration affected the recreational value of the natural area.

I used a pooled model, like in contingent travel cost model. The results are that dummy variable (expressing whether visitor is pre or post restoration) is significant and negative, whereas its interaction with cost is not significant.

I understand that being pre or post is influencing number of visits but it is not influencing the demand curve. Is this true?

Therefore, do these results mean that ecological restoration is not significantly affecting the value of a visit?

(I attach the results of the model)

Hi all,

I want to design a questionary to evaluate the impact of a restoration -implementing multifuntional herdgerows- on farmer's opinion. The hedgerows will also have functions as hosts of alies to avoid plagues, control of erosion, etc.

Many thanks for your help and best regards

In Syria now, there is a problem with plant water hyacinth (Eichhornia), in my opinion, reintroduced of Bubalus (water buffalo) as a natural enemy and restoration of natural cycles of Environment, it's enough to solve this problem and to keeping water resources in save.

What's your opinion ? and what solutions can be taken?

I am conducting a meta-analysis on plant abundance in restored vs. natural habitats. I am using a response ratio measure of effect size ln(restored)-ln(natural). I want to calculate effect size variance, but in some situations I find that the variance in one of the treatments is 0 because all sample values are equal to the mean (either 100% or 0% cover). Must I omit these trials if I want to include variance in the analysis? I know sometimes authors will omit studies that do not properly report variance, but is seems like there might be a bias introduced if I omit studies because the data itself did not allow for the calculation of effect size variance.