It’s possible that I shall make an ass of myself. But in that case one can always get out of it with a little dialectic. I have, of course, so worded my proposition as to be right either way (K.Marx, Letter to F.Engels on the Indian Mutiny)
Monday, March 02, 2020
FAKE NEWS HEADLINE (S) INFLUENZA SPANISH FLU AKA THE FLU IS BEING USED AS A SENSATIONALIST LINK TO THE CURRENT PANDEMIC. FALSE EQUIVALENCY TO CREATE PANIC
TOTAL DEATHS UNKNOWN
OCCURRED AT END OF WWI AND SO BOTH EVENT FATALITIES GET INTERMIXED
UNTIL 1920 Coronavirus WARNING: Deadly virus 'like 1918 Spanish flu pandemic' which killed 50 million
Coronavirus horror:70% of humanity faces infection - Is COVID-19 worse than Spanish Flu?
Coronavirus cure: Could Vitamin C be the wonder vaccine? China’s doctors think so
A STUDY is underway in China looking into the effects of vitamin C as a potential vaccine for...
EU migrant crisis: Shocking moment Greek border guards open fire at migrant boat – video
SHOCKING footage of Greek coastguards attempting to push away a boat full of migrants by opening fire on them has emerged on social media, amid rising tensions between Turkey and the EU.
Turkey: Coast guard appear to shoot at boat on Bodrum coast
The shocking video shows an inflatable boat full of migrants trying to reach Greece from the coast of Bodrum, Turkey, but brutally stopped by two vessels of the Greek coastguard. Migrants can be seen pushed away with a stick as they attempt to climb one of the two coastguards boats. Gunshots are then fired in the sea very close to the migrants' inflatable boat which is so full it looks close to sinking.
The disturbing footage comes as Greek police fired tear gas to repel hundreds of stone-throwing migrants who tried to force their way across the border from Turkey on Sunday, with thousands more behind them after Ankara relaxed curbs on their movement.
The Greek Government called the confrontations a threat to national security. "Do not attempt to enter Greece illegally - you will be turned back," Prime Minister Kyriakos Mitsotakis said on Twitter after a security meeting on the situation.
It was the second straight day of clashes at the border crossing near the northeastern Greek town of Kastanies.
Video footage provided by a Greek government source and seen by Reuters also appeared to show tear gas being fired from the Turkish side of the border at the Greek riot police.
EU migrant crisis: Greece coastguards push away a migrant boat (Image: TWITTER•NC)
Turkey news: Greek coastguards push the migrant boat away with sticks (Image: TWITTER•NC)
"The present situation is an active, serious, severe and asymmetrical threat to the national security of the country," Greek government spokesman Stelios Petsas told reporters.
"These people are being used by Turkey as pawns to exert diplomatic pressure," he added.
A child died after being pulled from the sea when a boat capsized on Monday off the Greek island of Lesbos, Greek officials said, the first reported fatality since Turkey opened its border last week to let migrants reach Europe.
Separately, two Turkish security sources told Reuters a Syrian migrant had died from injuries on Monday after Greek security forces intervened to prevent migrants crossing from Turkey into Greece, but Athens branded the claim "fake news".
Greece: Tear gas gets fired at border with Turkey
Turkey said on Thursday it would let migrants cross its borders into Europe, despite a commitment to hold them in its territory under a 2016 deal with the European Union.
Turkey's turnabout came after an airstrike killed 33 Turkish soldiers in its neighbour Syria, and appeared to be an effort to press for more EU support in tackling the refugee crisis from Syria's civil war.
Ankara has dismissed Greek criticism of its decision to open the border and has condemned Greece's response to the migrants.
At least 600 people had arrived by sea on the Greek islands of Lesbos, Chios and Samos close to the Turkish coast within a few hours on Sunday morning, police said.
Turkey news: Gunshots are fired in the water to push away migrant boat (Image: TWITTER•NC)
Along the northeastern mainland border, some migrants waded across a shallow section of the Evro River to the Greek side.
Witnesses said there were groups of up to 30, including an Afghan mother with a five-day-old infant, by the side of a road after having forded the river.
The clashes occurred later in the day at the Kastanies crossing after riot police reinforced security there. No further details were immediately available as police were escorting reporters away from the scene, citing safety considerations.
A Greek government source said some migrants had thrown metal bars.
European Commission President Ursula von der Leyen expressed sympathy with Turkey over the conflict in Syria on Monday but said it was impermissible for Ankara to let refugees and migrants on its territory cross into Europe.
EU insiders believe President Erdogan’s threats are being used as leverage to secure more European support for his military campaigns inside Syria.
It has prompted fears the bloc might have to lockdown its borders in order to avoid a new refugee crisis.
The deputy leader of Angela Merkel’s CDU party have said Germany should prepare to close its borders to avert a repeat of the 2015 migrant crisis.
Thorsten Frei said: “Observing the situation with concern is not enough, If the refugees and migrants living in Turkey have the impression that the border to Europe is open or cannot be closed, many more people will be on their way."
People queue at the Greek-Turkish border as clashes break out (Image: GETTY)
Riot police attempted to return people crossing the border into Greece in violent fashion (Image: GETTY)
Dutch prime minister Mark Rutte accused Turkey of holding a “knife on the throat” of EU countries.
He added: “It is very important that Europe is united here, that we let the Turks know that this is an unacceptable violation of those agreements and that it is also putting people in an impossible position.”
Turkish authorities have complained the Greek coastguard has attempted to push migrant boats back across the border after footage emerged of shots also being fired into the water.
Greek authorities today recovered the body of a child who died when one boat capsized off the island of Lesbos.
Genetic study shows the red panda is actually two separate species
WASHINGTON (Reuters) - Red pandas, the bushy-tailed and russet-furred bamboo munchers that dwell in Asian high forests, are not a single species but rather two distinct ones, according to the most comprehensive genetic study to date on these endangered mammals.
Scientists said on Wednesday they found substantial divergences between the two species - Chinese red pandas and Himalayan red pandas - in three genetic markers in an analysis of DNA from 65 of the animals.
The recognition of the existence of two separate species could help guide conservation efforts for a mammal adored by many people even as its numbers dwindle in the wild, they added.
Chinese red pandas are found in northern Myanmar as well as southeastern Tibet, Sichuan and Yunnan provinces in China, while Himalayan red pandas are native to Nepal, India, Bhutan and southern Tibet in China, the researchers said.
International experts have estimated a total population of roughly 10,000 red pandas in the wild.
“To conserve the genetic uniqueness of the two species, we should avoid their interbreeding in captivity,” said Chinese Academy of Sciences conservation biologist Yibo Hu, who along with colleague Fuwen Wei led the study published in the journal Science Advances. “Interbreeding between species may harm the genetic adaptations already established for their local habitat environment.”
Scientists previously recognized red pandas as divided into two subspecies. While it had been proposed that these were separate species, the new study was the first to provide the genetic data necessary to allow such a judgment.
The Himalayan red panda is the scarcer of the two and needs urgent protection because of low genetic diversity and small population size, Hu said. The Yalu Zangbu River most likely marks the geographical boundary separating the two species, not the Nujiang River as previously believed, Hu added.
The two species also differ in coloration and skull shape.
“The Himalayan red panda has more white on the face, while the face coat color of the Chinese red panda is redder with less white on it. The tail rings of the Chinese red panda are more distinct than those of the Himalayan red panda, with the dark rings being more dark red and the pale rings being more whitish,” Hu said.
Slightly bigger than a domestic cat, red pandas have thick fur, a short snout and pointed ears, spending much of their life in trees and dining mostly on bamboo. Major threats to red pandas include deforestation and degradation of their habitat due to human development.
Despite similar names, red pandas and giant pandas are not closely related. Giant pandas are one of the world’s eight bear species. Red pandas, with no close living relatives, are sometimes called living fossils as the only remaining member of the Ailuridae mammalian family. They are probably most closely related to a group that includes weasels, raccoons and skunks.
There are two distinct red panda species, according to DNA analysis
by Bob Yirka , Phys.org
Distinguishing morphological Chinese red panda. (B and D) The Himalayan red panda. (A and B) The face coat color of the Chinese red panda is redder with less white on it than that of the Himalayan red panda. (C and D) The tail rings of the Chinese red panda are more distinct than those of the Himalayan red panda, with the dark rings being more dark red and the pale rings being more whitish. Photo credit: (A) Yunfang Xiu, Straits (Fuzhou) Giant Panda Research and Exchange Center, China; does not require permission. (B) Arjun Thapa, Institute of Zoology, Chinese Academy of Sciences. (C) Yibo Hu, Institute of Zoology, Chinese Academy of Sciences. (D) Chiranjibi Prasad Pokheral, Centr55555555al Zoo, Jawalkhel, Lalit Credit: Science Advances (2020). DOI: 10.1126/sciadv.aax5751Distinguishing morphological differences between two red panda species. (A and C) The Chinese red panda. (B and D) The Himalayan red panda. (A and B) The face coat color of the Chinese red panda is redder with less white on it than that of the Himalayan red panda. (C and D) The tail rings of the Chinese red panda are more distinct than those of the Himalayan red panda, with the dark rings being more dark red and the pale rings being more whitish. Photo credit: (A) Yunfang Xiu, Straits (Fuzhou) Giant Panda Research and Exchange Center, China; does not require permission. (B) Arjun Thapa, Institute of Zoology, Chinese Academy of Sciences. (C) Yibo Hu, Institute of Zoology, Chinese Academy of Sciences. (D) Chiranjibi Prasad Pokheral, Central Zoo, Jawalkhel, Lalitpur, Nepal; does not require permission. Credit: Science Advances (2020). DOI: 10.1126/sciadv.aax5751A team of researchers at the Chinese Academy of Sciences has found that two varieties of red panda actually comprise two different species. In their paper published in the journalScience Advances, the group describes the genetic study they undertook of the mammals, which are native to the Himalayas and southwestern China, and what they learned.
Red pandas are cat-sized mammals that look more like red raccoons than pandas. They have red coats, masked faces and ringed tails. They live athigh altitudes, and like pandas, eat bamboo. They once lived across much of Eurasia, but they are now listed as endangered—their population has dwindled to just 10,000. They live only in the southeastern and southern parts of the Qinghai-Tibetan Plateau. Prior study has shown that there are two varieties of the red panda: the Chinese red panda and the Himalayan red panda. Chinesered pandasare known for having redder faces with less of the white wisps in their fur. Their tail rings are also darker with more white between them. Scientists have wondered for some time whether the two varieties were actually distinct species. In this new effort, the researchers have found evidence that shows that they are, indeed, twodistinct species—a finding that could have an impact on efforts to save them both.
The work involved sequencing the genomes of 65 wild red pandas. The researchers collected muscle, skin and blood samples from seven population areas. The analysis was focused on finding differences in DNA base pairs on the Y chromosome. The data showed that not only are the two varieties of red panda different species, but that the Chinese red panda has three populations that are genetically different. It also showed that the line that divides the two species is not the Nujiang River, as previously thought, but the Yalu Zanbu River.
The researchers suggest their findings are important for the survival of both species, because it will help to concentrate specific conservation activities that are best suited for each of them. Also, it will help to prevent interbreeding that could lead to one species overtaking another.
Distinguishing morphological differences between two red panda species. (A and C) The Chinese red panda. (B and D) The Himalayan red panda. (A and B) The face coat color of the Chinese red panda is redder with less white on it than that of the Himalayan red panda. (C and D) The tail rings of the Chinese red panda are more distinct than those of the Himalayan red panda, with the dark rings being more dark red and the pale rings being more whitish. Photo credit: (A) Yunfang Xiu, Straits (Fuzhou) Giant Panda Research and Exchange Center, China; does not require permission. (B) Arjun Thapa, Institute of Zoology, Chinese Academy of Sciences. (C) Yibo Hu, Institute of Zoology, Chinese Academy of Sciences. (D) Chiranjibi Prasad Pokheral, Central Zoo, Jawalkhel, Lalitpur, Nepal; does not require permission. Credit: Science Advances (2020). DOI: 10.1126/sciadv.aax5751
More information: Yibo Hu et al. Genomic evidence for two phylogenetic species and long-term population bottlenecks in red pandas, Science Advances (2020). DOI: 10.1126/sciadv.aax5751
Swamp wallabies conceive new embryo before birth—a unique reproductive strategy
Swamp wallaby. Credit: Geoff Shaw, University of Melbourne
Marsupials such as kangaroos or wallabies are known for their very different reproductive strategies compared to other mammals. They give birth to their young at a very early stage and significant development occurs during a lengthy lactation period in which the offspring spends most of its time in a pouch. Although in some marsupials new ovulation happens only a few hours after giving birth, the regular consecutive stages of ovulation, fertilization, pregnancy and lactation are respected—with one exception: Reproduction specialists from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW), Germany, and the University of Melbourne, Australia, recently demonstrated that swamp wallabies ovulate, mate and form a new embryo before the birth of the previous offspring. They thereby continuously support embryos and young at different development stages before and after birth. These findings are published in the Proceedings of the National Academy of Sciences.
Using high-resolution ultrasound to monitor reproduction in swamp wallabies during pregnancy, Prof Thomas Hildebrandt (Leibniz-IZW and University of Melbourne), Dr. Brandon Menzies and Prof Marilyn Renfree (both from University of Melbourne) were able to confirm what has been suspected for a long time: swamp wallabyfemalesovulate, mate and form a new embryo whilst already carrying a full-term fetus that they will soon give birth to. The new embryo enters embryonic diapause until the new-born offspring leaves the pouch nine months later. Thus, when the embryonic diapause is included, females are continuously pregnant throughout their reproductive life, a unique reproductive strategy that completely blurs the normal staged system of reproduction in mammals.
This phenomenon is made possible by two anatomically completely separated uteri and cervices connected to ovaries by their oviducts. "This is true for all marsupials, but the unique overlapping reproductive cycles seem to be a special feature of the swamp wallabies," says Renfree. Normally, ovulation alternates between the two ovaries. "All female macropodid marsupials—essentially kangaroos, wallabies and a few other groups of species—except the swamp wallaby have an oestrous cycle longer than the duration of their pregnancy, so females come into oestrus, ovulate and mate within hours after birth." It has been suspected for some time that swamp wallabies might conceive during an active pregnancy, because the oestrous cycle of the swamp wallaby is shorter than the duration of their pregnancy and there have been reports about mating before the birth of the previous offspring. Such a "superfetation" has previously been only described (by Leibniz-IZW scientists) for the European brown hare where females copulate again three to four days before the birth of the incumbent young, forming new conceptuses during an active pregnancy.
In order to confirm superfetation in swamp wallabies, the scientists removed the pouch young of ten females to reactivate the dormant blastocysts (early stage embryo). They then monitored the development of the blastocyst in four of these ten females using high-resolution ultrasound. All females gave birth at around 30 days after the young had been removed. Parallel to the embryo development in one uterus, the scientists closely examined the opposite ovary. There, follicles started to appear and grow. At day 26 of the pregnancy the ultrasound examination showed that the conceptus had developed into a fetus with the head, limbs and heartbeat clearly visible—and at day 28 and 29 the largest follicle in the opposite (contralateral) ovary had ovulated and a new corpus luteum was evident. The other six females that were not scanned with ultrasound were regularly examined for sperm. Sperm was identified in the urogenital tract one to two days before birth but at no other time. "These results clearly demonstrate that swamp wallabies ovulate and mate one to two days before birth, during an existing pregnancy," says Hildebrandt.
Pregnancies of eutherian mammals (most mammals, i.e. the most taxonomically diverse of the three branches of mammals) greatly exceed the length of the oestrous cycle, so during mammalian evolution, there has been selection pressure to extend the duration of pregnancy. Among marsupials (who form a second taxonomic branch of mammals), gestation in most macropodids encompasses almost the entire duration of the oestrous cycle. The swamp wallaby takes this one step further with its pre-partum oestrus, allowing this marsupial's gestation length to exceed the oestrous cycle length.
Sadly, many of these unique animals have been lost in the current disastrous bushfires in Australia this summer.
New South Wales' Forestry Corporation will this week start "selective timber harvesting" from two state forests ravaged by bushfire on the state's south coast.
The state-owned company says the operations will be "strictly managed" and producetimberfor power poles, bridges, flooring and decking.
Similarly, the Victorian government's logging company VicForests recently celebrated the removal of sawlogs from burnt forests in East Gippsland.
VicForests says it did not cut down the trees—they were cut or pushed over by the army, firefighters or road crews because they blocked the rood or were dangerous. The company said it simply removed the logs to put them "to good use."
However the science on the impacts of post-fire logging is clear: it can significantly impair the recovery of burned ecosystems, badly affect wildlife and, for some animal species, prevent recovery.
We acknowledge that for safety reasons, some standing and fallen burnt trees must be removed after a fire. But wherever possible, they should remain in place.
Detailed studies around the world over the past 20 years, including in Australia, have demonstrated the damage caused by post-fire logging.
Indeed, the research shows post-fire logging is the most damaging form of logging. Logging large old trees after a fire may make the forests unsuitable habitat for many wildlife species for up to 200 years.
Long-term monitoring data from extensive field surveys shows hollow-dependent mammals, such as the vulnerable greater glider, generally do not survive in areas burned and then logged. Research by the lead author, soon to be published, shows populations are declining rapidly in landscapes dominated by wood production.
Forests logged after a fire have the lowest bird biodiversity relative to other forests, including those that burned at high severity (but which remain unlogged). Critical plants such as tree ferns are all but eradicated from forests that have been burned and then logged.
Soils remain extensively altered for many decades after post-fire logging. This is a major concern because runoff into rivers and streams damages aquatic ecosystems and kills organisms such as fish.
A double disturbance
Fire badly disrupts forest ecosystems. Animals and plants then begin recovering, but most forests and the biota they support simply cannot deal with the second intense disturbance of logging so soon after a first one.
For example, young germinating plants are highly vulnerable to being flattened and destroyed by heavy logging machinery. And in an Australian context, post-fire logging makes no sense in the majority of eucalypt-dominated ecosystems where many tree species naturally resprout. This is an essential part of forest recovery.
Logs provide shade, moisture and shelter for plants, and rotting timber is food for insects—which in turn provide food for mammals and birds.
Living and dead trees are also important for fungi—a food source for many animals, including bandicoots and potoroos which have been heavily impacted by the fires.
Similarly on burnt private land, removing damaged and fallen trees will only hinder natural recovery by removing important animal habitat and disturbing the soil. If left, fallen trees will provide refuge for surviving wildlife and enable the natural recovery of forests.
While the sight of burnt timber can be disheartening, landholders should resist the urge to "clean up."
It doesn't add up
Research in North America suggests debris such as tree heads, branches and other vegetation left by post-fire logging not only hinders forest regeneration, but can make forests more prone to fire.
Timber is predominantly sold cheaply for use as woodchips and paper pulp and fire-damaged timber is of particularly poor quality. Even before the fires, 87% of all native forest logged in Victoria was for woodchips and paper pulp.
Post-fire logging certainly has no place in national parks. But for the reasons we've outlined, it should be avoided even in state forests and on private land. Million hectares of vegetation in Australia was damaged or destroyed this fire season. The last thing our forests need is yet more disturbance.
VicForests response: VicForests told The Conversation that timber currently being removed by VicForests, at the direction of the Chief Fire Officer, is from hazardous trees that were cut or knocked over to enable the Princes Highway to be re-opened.
It said the timber would be used for fence restoration, firewood and to support local mills "protecting jobs, incomes and families. It would otherwise be left in piles on the side of the highway."
"Any further post-fire recovery harvesting will occur in consultation with government including biodiversity specialists and the conservation regulator, following careful assessment and protection of high conservation values," VicForests said.
The company said post-fire recovery harvesting, particularly of fire-killed trees, does not increase fire risk.
"Sensitive harvesting including the retention of habitat trees and active re-seeding is more likely to result in a successfully regenerated forest and a supportive environment for threatened species. This regenerating forest will have the same fire risk as natural regeneration following bushfire."
Forestry Corporation of NSW response: Forestry Corporation of NSW said in a statement that small-scale selective timber harvesting operation will begin on the south coast this week.
The company's senior planning manager Dean Kearney said the Environment Protection Authority, with the input of scientific experts "has provided Forestry Corporation with site-specific conditions for selective timber harvesting operations in designated parts of Mogo and South Brooman State Forests. These areas were previously set aside for timber production this year but have now been impacted by fire."
"Strictly-managed selective timber harvesting will help prevent the loss of some high-quality timber damaged by fire, including material that will be in high demand for rebuilding, while ensuring the right protections are in place for key environmental values, particularly wildlife habitat, as these forests begin regenerating," he said.
"The harvesting conditions augment the already strict rule set in place for forest operations and include requirements to leave all unburnt forest untouched and establish even more stringent conditions to protect water quality, hollow-bearing trees and wildlife habitat."
Transforming potato waste into a new industry for Australia
by Fight Food Waste CRC
Credit: CC0 Public Domain
Four of the largest potato producers in Australia want to convert 100% of their potato waste into commercial benefit through their partnership with the Fight Food Waste Cooperative Research Centre (CRC). Over the next three years, The Mitolo Group, Zerella Fresh, Thomas Foods International Fresh Produce, The South Australian Potato Company, together with Industry Association; Potatoes South Australia Inc, and The University of Adelaide will invest nearly $1m in this research and development to save up to 100,000 tonnes of potatoes currently going to waste every year.
Chief Executive of Potatoes South Australia Robbie Davis says that this is a fantastic opportunity for Australia, particularly South Australia as it is the largest potato growing state.
"We are seeing up to 40% of potatoes rejected because they do not meet retail specifications. At the same time Australia is importing 20,000 tonnes of potato starch each year, and it just doesn't make sense that we're not using these huge volumes of potatoes for alternative purposes," she said.
A large focus of this project is the potential development of an Australian potato starch industry which would provide additional revenue for Australian potato companies; potentially $1000 a tonne for extracted starch instead of the current value of $0-10 a tonne for the waste.
"Potato starch is used broadly across the food industry, from bioplastics and packaging, to coatings and adhesives. We also want to use the waste from the waste, so after extracting the potato starch, there will be further opportunities using the residual waste from this first stage," says Ms Davis.
The four Australian potato companies that have partnered with the Fight Food Waste CRC are leaders in their industry and recognise the opportunity this represents to the industry.
Professor Vincent Bulone from the University of Adelaide is leading this research project from his world-class analytical centre for complex carbohydrate analysis, Adelaide Glycomics. The project is in line with the University's industry engagement priority on agrifood and wine.
"There are different forms of starch in potatoes that can be used in different products. For example, existing research suggests that the less digestible starches in potatoes, the so-called 'resistant starches," can be used to make superior pre-biotics that help prevent infections," says Professor Bulone.
"Another known starch component can be used to engineer low GI foods, and the skins of the potatoes themselves contain bioactives that can be used for a range of commercial products like nutraceuticals."
Fight Food Waste CRC CEO Dr. Steven Lapidge is thrilled to have such a transformational project underway so early in the Fight Food Waste CRC's journey and sees the partnership between all of the potato producers as a great example of what CRCs can achieve.
"We're looking to develop new products from current waste streams that will deliver additional profit to potato producers through domestic and export sales.
"Through investing in research and development we aim to deliver new high-value commercial opportunities for the participants of this project.
"This project is exactly what the CRC is all about; delivering real benefit for Australian businesses across the whole of the value chain."
More information: Fight Food Waste: www.fightfoodwastecrc.com.au
Provided by Fight Food Waste CRC
New eggplant varieties resistant to extreme conditions
by Universitat Politècnica de València
Credit: Universitat Politècnica de València
The Universitat Politècnica de València (UPV), through the Institute of Conservation and Improvement of Valencian Agrodiversity (COMAV), leads EggPreBreed II, an international project that will help in developing new varieties of eggplants more resistant to extreme drought conditions, and to two of the most serious pathologies that affect this crop, such as the Fusarium fungus and nematodes. These phytopathological enemies of eggplant can cause significant crop losses and their incidence is expected to be even greater due to climate change.
Eggplant is one of the thirty-five crops considered as most important for world food security and, as such, is included in Annex 1 of the FAO International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA).
The EggPreBreed II project will help to develop new varieties of this crop with better properties. For this, the COMAV team works in new crosses of eggplants grown with related wild species such as, for example, Solanum incanum and Solanum elaeagnifolium, which have a high resistance to drought. With these crosses EggPreBreed II will allow to obtain genetic material of eggplant that in most of its characters—fruit size, color, composition, etc. - is indistinguishable from a presently cultivated eggplant, but they have fragments of the wild species genome that can confer properties of great value to the market.
"By introducing genes from these wild species we can improve drought tolerance, get higher eggplant production with the same amount of water. But, in addition, we can also take advantage of other characteristics of interest of wild species, for example, their high content in phenolic compounds, of great interest for human health. Therefore, this project opens the door to a new generation of commercial varieties of eggplant that can have greater efficiency in the use of water and with better functional properties," explains Jaime Prohens, director of COMAV-UPV and principal investigator of EggPreBreed II.
Seven years of research
The project is a continuation of research that the COMAV-UPV team has been developing since 2013. In these years, they have obtained different lines of introgression—genetic material of eggplant that includes a fragment of the genome of other donor species, in this case wild relatives.
"The objective now is to refine these materials, improve them to reduce the unfavorable characteristics of wild species, such as the presence of prickles or the intense bitterness of the fruit, obtaining pure lines resistant to stress caused by climate change, Fusarium and nematodes. Having this material will make it easier for seed companies to use and incorporate it into breeding pipelines in order to develop new commercial varieties in a crop as important worldwide as eggplant," says Prohens.
The project is part of the global initiative "Adapting Agriculture to Climate Change: Collecting, Protecting and Preparing Wild Relatives", led by the Global Crop Diversity Trust (Crop Trust) and funded by the Norwegian Government.
"In the first phase of this project, Jaime and his team managed to cross domestic varieties of eggplant with 15 different wild relatives, an impressive achievement," indicates Benjamin Kilian, representative of the Crop Trust, who says that "we are pleased to support the scientists of the UPV in this second phase; we are sure that the fruits of this effort will help to adapt our agriculture to climate change."
The EggpreBreed-II project also involves an Egyptian university (University of Kafrelsheikh), involved in the analysis of resistance to Fusarium and nematodes, as well as several seed companies from the Philippines, Egypt, France and Spain that will test the commercial utility of the plant materials developed in the project and will incorporate them in their breeding programs to develop the new varieties.
All agronomic and genetic data generated throughout this project will be shared in the future on the online platform Germinate, a database platform that provides a standard and common interface to genetic resources collections.
MIT researchers have used a neural network to identify low-frequency seismic waves hidden in earthquake data. The technique may help scientists more accurately map the Earth’s interior. Credit: Christine Daniloff, MIT
Over the last century, scientists have developed methods to map the structures within the Earth's crust, in order to identify resources such as oil reserves, geothermal sources, and, more recently, reservoirs where excess carbon dioxide could potentially be sequestered. They do so by tracking seismic waves that are produced naturally by earthquakes or artificially via explosives or underwater air guns. The way these waves bounce and scatter through the Earth can give scientists an idea of the type of structures that lie beneath the surface.
There is a narrow range of seismic waves—those that occur at low frequencies of around 1 hertz—that could give scientists the clearest picture of underground structures spanning wide distances. But these waves are often drowned out by Earth's noisy seismic hum, and are therefore difficult to pick up with current detectors. Specifically generating low-frequency waves would require pumping in enormous amounts of energy. For these reasons, low-frequency seismic waves have largely gone missing in human-generated seismic data.
Now, MIT researchers have come up with a machine learning workaround to fill in this gap.
In a paper appearing in the journal Geophysics, they describe a method in which they trained a neural network on hundreds of different simulated earthquakes. When the researchers presented the trained network with only the high-frequency seismic waves produced from a new simulated earthquake, the neural network was able to imitate the physics of wave propagation and accurately estimate the quake's missing low-frequency waves.
The new method could allow researchers to artificially synthesize the low-frequency waves that are hidden in seismic data, which can then be used to more accurately map the Earth's internal structures.
"The ultimate dream is to be able to map the whole subsurface, and be able to say, for instance, 'this is exactly what it looks like underneath Iceland, so now you know where to explore for geothermal sources,'" says co-author Laurent Demanet, professor of applied mathematics at MIT. "Now we've shown that deep learning offers a solution to be able to fill in these missing frequencies."
Demanet's co-author is lead author Hongyu Sun, a graduate student in MIT's Department of Earth, Atmospheric and Planetary Sciences.
Speaking another frequency
A neural network is a set of algorithms modeled loosely after the neural workings of the human brain. The algorithms are designed to recognize patterns in data that are fed into the network, and to cluster these data into categories, or labels. A common example of a neural network involves visual processing; the model is trained to classify an image as either a cat or a dog, based on the patterns it recognizes between thousands of images that are specifically labeled as cats, dogs, and other objects.
Sun and Demanet adapted a neural network for signal processing, specifically, to recognize patterns in seismic data. They reasoned that if a neural network was fed enough examples of earthquakes, and the ways in which the resulting high- and low-frequency seismic waves travel through a particular composition of the Earth, the network should be able to, as they write in their paper, "mine the hidden correlations among different frequency components" and extrapolate any missing frequencies if the network were only given an earthquake's partial seismic profile.
The researchers looked to train a convolutional neural network, or CNN, a class of deep neural networks that is often used to analyze visual information. A CNN very generally consists of an input and output layer, and multiple hidden layers between, that process inputs to identify correlations between them.
Among their many applications, CNNs have been used as a means of generating visual or auditory "deepfakes"—content that has been extrapolated or manipulated through deep-learning and neural networks, to make it seem, for example, as if a woman were talking with a man's voice.
"If a network has seen enough examples of how to take a male voice and transform it into a female voice or vice versa, you can create a sophisticated box to do that," Demanet says. "Whereas here we make the Earth speak another frequency—one that didn't originally go through it."
Tracking waves
The researchers trained their neural network with inputs that they generated using the Marmousi model, a complex two-dimensional geophysical model that simulates the way seismic waves travel through geological structures of varying density and composition.
In their study, the team used the model to simulate nine "virtual Earths," each with a different subsurface composition. For each Earth model, they simulated 30 different earthquakes, all with the same strength, but different starting locations. In total, the researchers generated hundreds of different seismic scenarios. They fed the information from almost all of these simulations into their neural network and let the network find correlations between seismic signals.
After the training session, the team introduced to the neural network a new earthquake that they simulated in the Earth model but did not include in the original training data. They only included the high-frequency part of the earthquake's seismic activity, in hopes that the neural network learned enough from the training data to be able to infer the missing low-frequency signals from the new input.
They found that the neural network produced the same low-frequency values that the Marmousi model originally simulated.
"The results are fairly good," Demanet says. "It's impressive to see how far the network can extrapolate to the missing frequencies."
As with all neural networks, the method has its limitations. Specifically, the neural network is only as good as the data that are fed into it. If a new input is wildly different from the bulk of a network's training data, there's no guarantee that the output will be accurate. To contend with this limitation, the researchers say they plan to introduce a wider variety of data to the neural network, such as earthquakes of different strengths, as well as subsurfaces of more varied composition.
As they improve the neural network's predictions, the team hopes to be able to use the method to extrapolate low-frequency signals from actual seismic data, which can then be plugged into seismic models to more accurately map the geological structures below the Earth's surface. The low frequencies, in particular, are a key ingredient for solving the big puzzle of finding the correct physical model.
"Using this neural network will help us find the missing frequencies to ultimately improve the subsurface image and find the composition of the Earth," Demanet says.
