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155 news posts in Environment

Environment

02 Dec 2022

‘The Maya had, and continue to have, a creative impact on forest composition’ – Dr Anabel Ford

El Pilar, an ancient Maya site in Belize In our Frontier Scientists series, we talk to Dr Anabel Ford, a leading researcher on the ancient Maya, about her career and research interests. Ford recently published a study in Frontiers in Ecology and Evolution in which she stressed the importance of the traditional milpa land use system for the Maya civilization, not only in the Classical Period, but also today. Dr Anabel Ford is a US archeologist who specializes in the ancient Maya of Central America. In 1983, she led the team that encountered the ancient Maya city of El Pilar in Belize. Ford is a faculty member of the Institute of Social Behavioral and Economic Research at the University of California Santa Barbara and the director of the MesoAmerican Research Center at the same university. She is an expert on the still-flourishing forest gardens of the Maya region, built up over several millennia of traditional land use by the Maya people. Recently she published the study, “Scrutinizing the paleoecological record of the Maya forest” in Frontiers in Ecology and Evolution. In the paper, she focuses on the traditional milpa-forest garden cycle, where maize, beans, squashes, tomatoes, and many others are […]

Environment

17 Nov 2022

Vast phytoplankton blooms may be lurking beneath Antarctic ice

by Angharad Brewer Gillham, Frontiers science writer Image: Shutterstock.com Researchers using NASA’s Earth observing system find that Antarctic sea ice allows enough light in to let hidden phytoplankton bloom in the Southern Ocean. Until now, we thought the packed sea ice of the Southern Ocean blocked all light from reaching the sea beneath, preventing phytoplankton — tiny algae which are the base of aquatic food webs — from growing there. The less light available, the less the phytoplankton can photosynthesize and therefore the less phytoplankton there will be, heavily restricting life beneath the ice. But research inspired by increasing under-ice blooms of phytoplankton in the Arctic has shown that Antarctic waters also have unexpected denizens, indicating that there is underestimated ecological variability under the ice. Blooms are often spotted as soon as the sea ice begins its seasonal retreat, supported by plenty of light and freshwater with high iron content. Yet a team led by Dr Christopher Horvat of Brown University and the University of Auckland suspected that there would already be potential phytoplankton blooms in waiting. Writing in Frontiers in Marine Science, they described using sampling from independent BGC-Argo floats and climate model output to estimate light availability beneath […]

Environment

04 Nov 2022

From ghost gear to microbe memories: 4 Frontiers articles you won’t want to miss

by Angharad Brewer Gillham, Frontiers science writer Image: Shutterstock.com At Frontiers, we bring some of the world’s best research to a global audience. But with tens of thousands of articles published each year, many often fly under the radar. Here are just four amazing papers you may have missed. The hunt for ghost gear 25-30% of the plastic waste in the sea is lost fishing gear, or ‘ghost gear’, some of it now up to 60 years old. This ghost gear devastates the environment not only through continuing to trap fish, but also by shedding microplastics into the environment which then enter the food chain. Once it sinks as far as the sea floor, it becomes invisible from above – a hidden threat to the marine ecosystem. A team led by Andrea Stolte from the World Wildlife Foundation, writing in Frontiers in Marine Science, reported a successful ghost-hunting collaboration between fisherfolk, scientists, and divers in the Baltic Sea. This coalition of stakeholders had several options for hunting down the ghost gear. Traditionally, when lost gear is spotted, fisherfolk use search hooks and other similar tools to try to retrieve it. However, this proved to be inefficient and damaging to the […]

Environment

03 Nov 2022

60% of home ‘compostable’ plastic doesn’t fully break down, ending up in our soil

By Suzanna Burgelman, Frontiers science writer Image: Citizen scientist image from www.bigcompostexperiment.org.uk In a UK-wide study, researchers found that 60% of home-compostable plastics do not fully disintegrate in home compost bins, and inevitably end up in our soil. The study also found that citizens are confused about the labels of compostable and biodegradable plastics, leading to incorrect plastic waste disposal. These results highlight the need to revise and redesign this supposedly sustainable plastic waste management system. Global plastic pollution remains one of the biggest environmental challenges of our time. A new OECD report shows that plastic consumption has quadrupled over the past 30 years. Globally, only 9% of plastic waste is recycled, while 50% ends up in landfills, 22% evades waste management systems, and 19% is incinerated. In response to this pollution crisis, several countries have set targets to eliminate all single-use plastics and to make plastic packaging 100% recyclable, reusable, or compostable by 2025.  Compostable plastics are becoming more common as the demand for sustainable products grows. The main applications of compostable plastics include food packaging, bags; cups and plates, cutlery, and bio-waste bags. But there are some fundamental problems with these types of plastics. They are largely unregulated and […]

Environment

28 Oct 2022

Real-time space observations can now keep watch over ‘super emitter’ power plants

By Mischa Dijkstra, Frontiers science writer Bełchatόw power station in central Poland. Image credit: Pawel Brzozowski / Shutterstock.com Under the Paris Agreement, countries will need to track greenhouse gas emissions at the level of individual ‘super emitters’, such as power plants, in close-to-real time. Researchers show for the first time that this is already possible with data from existing satellites and instruments like NASA’s OCO-2 and OCO-3 (attached to the International Space Station), both designed to measure emissions at much larger spatial scales. This proof-of-principle indicates that the EU’s ‘CO2M’ pair of satellites, planned for 2025 or 2026, with a joint coverage a hundred times greater than OCO-2 and OCO-3, should be able to deliver on future needs.  Countries signed up to the 2015 Paris Agreement have committed themselves to keep the rise in average global temperature ‘well below’ 2 °C. Every five years, they are to issue so-called ‘nationally determined contributions’ (NDCs), describing their actions to reduce greenhouse gas (GHG) emissions and adapt to climate change impacts. Countries will thus need to track their carbon emissions, not only at a national level, but also at the scale of individual ‘super emitters’ such as power plants, megacities, refineries, and giant […]

Environment

21 Oct 2022

Secret behind spectacular blooms in world’s driest desert is invisible to human eyes

By Mischa Dijkstra, Frontiers science writer The 2021 ‘desierto florido’ near Caldera, Chile. The purple flowers are the pussypaw Cistanthe longiscapa (family Montiaceae), the object of this study. Image credit: Oven Pérez-Nates A ‘desierto florido’ mass bloom happened in the northern Atacama desert in 2021, which was even visible from space. Researchers used advanced imaging techniques to measure the variation in flower color and pattern for the dominant species, the pussypaw Cistanthe longiscapa. They found that this variation is much greater when viewed by the UV-sensitive eyes of hymenopteran pollinators, and caused by differences in the mix of betalain pigments in the petals. Evolution is probably ongoing, driven by the species-specific visual preferences of pollinators, which could ultimately lead to new species. The Atacama desert, which stretches for approximately 1,600 km along the western coast of the cone of South America, is the driest place on Earth. Some weather stations there have never recorded rainfall throughout their existence. But it‘s far from barren: many species live here that occur nowhere else, adapted to its extreme conditions. And approximately every five to 10 years, from September to mid-November, the Atacama hosts one of the most spectacular sights of the natural world: […]

Environment

19 Oct 2022

Mushroom that grows on insects could help develop new anti-viral medications and cancer drugs

By Angharad Brewer Gillham, Frontiers science writer Image: bob.leccinum.Robert Kozak/Shutterstock.com Scientists studying the medicinal potential of a rare insect-eating mushroom have found a way to grow the elusive fungi in the lab, opening the way for the development of new anti-viral and cancer medications. The Cordyceps mushroom is best known for its gruesome eating habits: famously, its spores infect insects and kill them, growing into fully-fledged fruiting bodies that sprout from the insects’ flesh. But Cordyceps also has significant medicinal potential, containing a bioactive compound cordycepin which could potentially be developed into powerful new antiviral medications and cancer drugs. The mushrooms are rare in the wild, and until now, growing healthy Cordyceps in the lab has been a challenge which impedes scientific research – but Professor Mi Kyeong Lee of Chungbuk National University and her team including Dr Ayman Turk, publishing today in Frontiers in Microbiology, have found a way to grow these elusive fungi in a controlled setting without losing their potency. “Cordycepin is one of the cytotoxic nucleoside analogs with complementary therapeutic activities in anti-proliferation and anti-metastasis in cancer cells,” said Dr Lee, senior author of the study. “In addition, recent research findings strongly urge preclinical and clinical […]

Environment

18 Oct 2022

WWII shipwreck has leaked many pollutants into the sea, changing the ocean floor around it

By Suzanna Burgelman, Frontiers science writer Torn deck plating of the V 1302  John Mahn that was damaged by the bomb that hit amidships. Image: Flanders Marine Institute/VLIZ Researchers have discovered that an 80 year old historic World War II shipwreck is still influencing the microbiology and geochemistry of the ocean floor where it rests. In Frontiers in Marine Science, they show how the wreck is leaking hazardous pollutants, such as explosives and heavy metals, into the ocean floor sediment of the North Sea, influencing the marine microbiology around it. The seabed of the North Sea is covered in thousands of ship and aircraft wrecks, warfare agents, and millions of tons of conventional munition such as shells and bombs. Wrecks contain hazardous substances (such as petroleum and explosives) that may harm the marine environment. Yet, there is a lack of information about the location of the wrecks, and the effect they might have on the environment.  “The general public is often quite interested in shipwrecks because of their historical value, but the potential environmental impact of these wrecks is often overlooked,” said PhD candidate Josefien Van Landuyt, of Ghent University. For example, it is estimated that World War I and […]

Environment

13 Oct 2022

From chili-heat pain relief to blue whale migration: 5 Frontiers articles you won’t want to miss

by Angharad Brewer Gillham, Frontiers science writer Image: Shutterstock.com At Frontiers, we bring some of the world’s best research to a global audience. But with tens of thousands of articles published each year, many often fly under the radar. Here are just five amazing papers you may have missed. Chili to the rescue: Modulating capsaicin as a treatment for chronic itching Pain and itching are both signals that help humans protect themselves, by prompting us to end contact with whatever causes us pain or make us itch. However, they are also key symptoms of many disorders, and can be frustratingly difficult to treat. Scientists from the Universidad Miguel Hernández, writing in Frontiers in Molecular Neuroscience, investigated whether transient receptor potential channels, which pick up sensory cues ranging from the taste of wasabi to changes in pH, could help treat pain and itching. Previous attempts to exploit these channels to stop pain and itching have not been successful because they cause overheating as a side effect, so the authors suggested that ‘soft’ modulation of the channels might be more patient-friendly, targeting only the channels that aren’t working correctly. While there are several existing medications which use capsaicin to target these channels, […]

Environment

12 Oct 2022

The ultimate death stare: How moth wing patterns scare off predatory birds with amazing optical illusion

by Dr Hannah Rowland, Max Planck Institute for Chemical Ecology, and Dr John Skelhorn, Newcastle University Image: Dr Hannah Rowland Many prey species have eyespot markings that are believed to ward off predators. But how, and does a predator’s angle of approach make them less effective? Dr Hannah Rowland and Dr John Skelhorn write for Frontiers about their research, published today in Frontiers in Ecology and Evolution, into how these protective patterns on moth wings convince birds it’s not worth attacking the insects. How art mirrors life when it comes to moth wings Have you ever felt that a person in a portrait is watching you, their eyes following you about a room? This optical illusion is known as the Mona Lisa effect, after Leonardo da Vinci’s famously enigmatic painting. When artists paint their sitter’s eyes with the pupils perfectly centered, no matter where visitors stand – to the left, right, or in front of the painting – eye contact is guaranteed. Nature seems to have hit upon the same idea. But in the animal kingdom it can be a matter of life or death. Many species of fish, butterflies, moths, praying mantids, and beetles have paired circular markings on […]

Environment

23 Sep 2022

Ancient Maya cities were dangerously contaminated with mercury

By Mischa Dijkstra, Frontiers science writer Temple of the Great Jaguar at Tikal, a UNESCO world heritage site in Guatemala. Image credit:  Leonid Andronov,/ Shutterstock.com A new review shows that the soil in the cities of the ancient Maya are heavily polluted with mercury. As vessels filled with mercury and objects painted with cinnabar have been found at many Maya sites, the authors conclude that the Maya were heavy users of mercury and mercury-containing products. This resulted in severe and dangerous pollution in their day, which persists even today. The cities of the ancient Maya in Mesoamerica never fail to impress. But beneath the soil surface, an unexpected danger lurks there: mercury pollution. In a review article in Frontiers in Environmental Science, researchers conclude that this pollution isn’t modern: it’s due to the frequent use of mercury and mercury-containing products by the Maya of the Classic Period, between 250 and 1100 CE. This pollution is in places so heavy that even today, it poses a potential health hazard for unwary archeologists. Lead author Dr Duncan Cook, an associate professor of Geography at the Australian Catholic University, said: “Mercury pollution in the environment is usually found in contemporary urban areas and […]

Environment

23 Sep 2022

Bees, blue light, and bacteria in beetles’ ‘back pockets’: Most viewed articles of August 2022

Image: Shutterstock.com by Angharad Brewer Gillham, Frontiers science writer Each month, Frontiers shines a spotlight on some of the leading research across a wide range of topics. Here are just some of the highlights that resonated strongly with readers on our news site in the month of August. 1. Modern pesticides make it hard for bees to keep on the straight and narrow Research published in Frontiers in Insect Science showed that common pesticides affected bees’ brains so that they couldn’t orient themselves properly. Bees exposed to sulfoxaflor and imidacloprid were tested on their ability to respond to stimuli that tricked them into thinking they’d been blown off course, a situation which required them to use their optomotor response to reorient themselves. Compared to control bees, they performed very poorly, reacting inappropriately or not at all to the stimuli. The problem seems to be caused by damage to the nervous system, but the exact mechanism is unclear. Since bees need this optomotor response to travel between different sources of pollen, and since these insecticides are widely used, this is a source of significant concern. The authors tested the optomotor response in walking bees rather than flying bees, so further research […]

Environment

12 Sep 2022

Scientists eavesdrop on minke whale ‘boing’ calls in Hawai’i, and 4 other articles you don’t want to miss

By Angharad Brewer Gillham, Frontiers science writer Image: Annie Leblanc/Shutterstock.com At Frontiers, we bring some of the world’s best research to a global audience. But with tens of thousands of articles published each year, many often fly under the radar. Here are just five amazing papers you may have missed. Scientists eavesdrop on minke whale conversations in Hawai’i Scientists writing in Frontiers in Marine Science used hydrophones to study hard-to-spot minke whales in Hawai’i, learning that they use their ‘boing’ calls more frequently when they are close to other members of the same species. Minke whales who visit this area are hard to study because they are small, solitary, and visit outside the times when most ship-based surveys are conducted. Passive acoustic monitoring, using hydrophones mounted on the sea bed, allows scientists to listen in on whales all year round. The authors used 47 hydrophones to record thousands of calls between 2012 and 2017. These calls were analyzed to detect individual whales and monitor their behavior in the study area. The minke whales used their ‘boing’ calls only between fall and spring, and called more rapidly when other minke whales were nearby. Because minke whales are so enigmatic, it isn’t […]

Environment

17 Aug 2022

Modern pesticides damage the brain of bees so they can’t move in a straight line

By Mischa Dijkstra, Frontiers science writer Image: Shutterstock.com Researchers show for the first time that honeybee foragers exposed to the pesticides sulfoxaflor and imidacloprid have an impaired optomotor response, which makes them poor at keeping themselves on a straight trajectory while moving. This impairment is accompanied by damage to brain cells and dysregulation of detoxification genes. These results add to the growing evidence that modern pesticides are highly damaging to beneficial insects like bees. The challenge to let people walk back and forth in a straight line isn’t just used by police to test if drivers are intoxicated: it’s also used by neurologists to diagnose neurological disorders like ataxia, where parts of the brain that coordinate movement are impaired. Now, researchers use an insect version of this challenge to show for the first time that modern pesticides damage the nervous system of honeybees so that it becomes hard for them to walk in a straight line. The results are published in Frontiers in Insect Science. “Here we show that commonly used insecticides like sulfoxaflor and the neonicotinoid imidacloprid can profoundly impair the visually guided behavior of honeybees. Our results are reason for concern because the ability of bees to respond […]

Environment

09 Aug 2022

Traces of 2010 Deepwater Horizon oil spill still detectable in 2020

By K.E.D. Coan, science writer Image: Breck P. Kent/Shutterstock.com Small amounts of highly weathered oil residues from the 2010 Deepwater Horizon disaster were still present in the surroundings ten years later, shows a new report. Crude oil is a complex mixture with many components that undergo chemical reactions in the environment. These transformed chemicals, as well as longer persisting oil products, can impact local ecosystems and a better understanding of the fates of these molecules can help future clean-up efforts. The oil spilled during the Deepwater Horizon disaster in 2010 was largely transformed by the end of that summer, reports a new study in Frontiers in Marine Science. But some small quantities of chemical residues still persisted in the environment even ten years later. This latest study follows the varied fates of the leaked petroleum components, providing important insights for future spills and clean-up efforts. “The better we understand the chemicals and their chemical reactive properties as well as their physical properties, the better we will be able to mitigate oil spills and understand and detect environmental damages from oil spills,” said first author Prof Edward Overton of Louisiana State University. “Our paper describes the most abundant chemicals that make […]