A study carried out by the IIRS has predicted a depletion of 9,007.14 square km (2.94 per cent) of forests in parts of Assam and Arunachal Pradesh by 2028.
A report published in the The Telegraph stated that the study – ‘Forest Cover Monitoring and Prediction in a Lesser Himalayan Elephant Landscape’ – published in the current issue of Current Science, says deforestation and loss of wildlife habitat in Upper Assam is likely to influence not only adjoining Bhutan and Arunachal Pradesh but Lower Assam as well. The IIRS is under the Indian Space Research Organisation (ISRO).
The report further stated that scientists involved in the study said they monitored the depletion of forest cover in parts of Assam and Arunachal Pradesh over 42,375 square km in an elephant landscape falling in the Lesser Himalaya in the North East. The study, which covered a vast elephant landscape spread across West Bengal-Assam, Assam-Bhutan and Assam-Arunachal Pradesh borders in the lesser Himalayas, found a loss of about 7,590 square km (17.92 per cent) of forest cover from 1924 to 2009.
This was also found by US Army topographic maps (1924) and multi-date satellite images. The forest cover of 2028 was predicted using the 2000-2009 depletion of forests study and Cellular Automata Markov Model (CAMM). As elephants are long-ranging animals and are distributed across the landscape, it is important to carry out studies covering large areas to address the habitat status over time, which can be used for effective habitat conservation.
By Neil Shaw
JOHANNESBURG — One of the world’s largest urban forests is under threat from a tiny beetle.
The polyphagous shot hole borer is thought to have made its way to Johannesburg from Southeast Asia on packing crates or through the trade in plant materials.
Trudy Paap, a forest pathologist at the University of Pretoria, discovered the beetle in the Pietermaritzburg Botanical Gardens last year. She published her discovery in the journal Australasian Plant Pathology, calling it part of “the surge in the global spread of invasive forest pests” because of globalization.
The beetle has since moved to Johannesburg, 200 miles away, and spread across its urban forest, which according to the Massachusetts Institute of Technology initiative Treepedia has the world’s sixth-largest green canopy cover.
Today, many of Johannesburg’s estimated 6 to 10 million trees are dying, a crisis obscured only by the current winter season. Some of the infected trees have the telltale holes the 2-millimeter-long beetle makes in their bark.
“This beetle doesn’t actually eat the trees,” Paap said. Instead it carries a fungus that blocks the vessels that transport water and nutrients, “which ultimately leads to die-back and death of the tree.”
Though scientists don’t know just how many trees have died from the beetles’ invasion, the outlook for Johannesburg is grim: “The city is going to lose a lot of trees.”
The trees do not have an evolved resistance to the polyphagous shothole borer, unlike in Asia where the beetles naturally occur.
It is the older, more established trees that are at risk, said arborist Neil Hill. “So that’s going to leave a gap in the landscape. And if we don’t start to plant straight way with new trees that gap is going to become more and more of a concern as far as urban blight, pollution, aesthetic beauty.”
New research suggests the removal of timber harvest residue during harvesting may be a boon for wild bees, an important step toward better understanding the planet’s top group of pollinators.
The findings are important because bees are the driving force behind $100 billion in global economic impact each year, with insect pollinators enhancing the reproduction of 90 percent of the Earth’s flowering plants, including many food crops.
Insect pollinators are also ecologically critical as promoters of biodiversity. Bees are the standard bearer because they’re usually present in the greatest numbers and because they’re the only pollinator group that feeds exclusively on nectar and pollen their entire life.
Researchers at Oregon State University spent two years studying 28 contiguous 1-acre clearcut sites. They assessed whether the abundance and diversity of wild bees was affected by the removal of timber harvest residue, also known as slash, and the soil compaction that goes along with it.
“Bees are important for biodiversity in managed forest landscapes but we just don’t have a very good handle on them in these areas,” said lead scientist Jim Rivers of the OSU College of Forestry.
The study plots occurred within a managed conifer forest in western Oregon. Each plot received one of five unique treatments, ranging from removing only the boles – tree trunks that are used to make lumber – without compacting the soil at all (no heavy equipment used on the plot) to removing all of the logging slash and compacting the entire plot.
The findings were surprising, Rivers said.
“The combination of the most intense timber residue removal and soil compaction treatment made for the greatest number and diversity of bees,” he said.
Things are looking up in a swath of forest in southern Germany, thanks to innovative funding from the European Union for a project that aims to help policymakers better understand how the forest’s ecosystems work.
The ECOPOTENTIAL project uses satellite images for ecosystem modelling in 25 Protected Areas in Europe (as well as Kenya, the Caribbean and Israel) to address climate change and other threats to ecosystems. In the Bavarian forest, the images and mathematical models of ecosystems, or “Earth Observation tools”, are helping to assess the impact of climate change and pollution, and shape national protection policies.
UN Environment is one of many partners supporting the 2015-2019 ECOPOTENTIAL project, funded by the European Union to the tune of 16 million euros.
Within the ECOPOTENTIAL project, Earth Observation tools and “remote sensing”, including by aircraft and drones, are being used to better understand how vegetation is evolving across the park and over time.
Satellite and drone pictures are detecting patterns of dominant plant species, linking habitat characteristics with terrain, and tracking animal movements. The park administration is also carrying out intensive research on tree regeneration, the role of dead wood, and the impact of global warming and extreme climatic events on the future development of these ecosystems.
BY EILLIE ANZILOTTI
A new tower will have greenery lining the balconies and roofs to clean up the air and provide a new environment for pollinators and humans alike.
Toronto has long been serious about its urban canopy. The Ontario city is already home to around 10 million trees, which cover around 26% of the city. The current mayor, John Tory, wants to grow that to 40%.
Brisbin Brook Beynon, a local architecture firm, is already giving the city a leg up on that goal, albeit in an unconventional way: a 27-story residential building that will be covered with around 450 trees, growing on its balconies and roofs. This “vertical forest,” as BBB terms it, takes inspiration from the Bosco Verticale–residential towers in Milan that went up in 2014 with as many as 11,000 plants lining the sides. Since then, copycat buildings have been built in cities like Nanjing and in Taiwan–designed to combat pollution and prove that green space does not need to be limited to the ground. This latest iteration could open as early as later next year.
For Brian Brisbin, principal at BBB, bringing the vertical forest concept to Toronto aligned perfectly with the mayor’s goals for increasing tree coverage. And when he began researching the concept by studying the Bosco Verticale, he realized that all of the technology that enabled the Milanese building to function originated in Canada and North America. “That felt fairly profound,” Brisbin says.
And it also, Brisbin says, made bringing the concept to Toronto feel much more feasible. “We have a lot of depth of specialty in this area in Toronto, with horticultural and agricultural universities and research facilities,” he says, “and we’ve brought a lot of together to take a very science-based approach to developing this project.”
By Gabriel Popkin
The trees are dying in three states and Canada, and scientists still don’t know why.
Ohio biologist John Pogacnik admits to mixed feelings about having discovered the latest disease imperiling a major American tree.
Pogacnik first noticed American beech trees with striped and shriveled leaves in 2012 during a routine survey of forests owned by his employer, Lake Metroparks. He didn’t think much of it at first: Just a few trees looked sick, and it had been a strange year, with an unusually warm winter and dry spring.
By the next summer, Pogacnik was seeing ailing trees throughout the six-county region in northeast Ohio where his agency manages more than 35 parks. He alerted colleagues at the Ohio Division of Forestry and the U.S. Forest Service.
“I’m glad to have found it, to just put it out there and let people know,” he said. “But it’s still not the greatest feeling in the world.”
Beech leaf disease has now popped up in nine Ohio counties, two other states and Canada, and its spread shows no sign of slowing. The disease has already felled young saplings; mature trees, some hundreds of years old, appear to be on the brink of death. Scientists fear the beech could soon face a plague as serious as those that have devastated chestnut, elm, hemlock and ash trees. “It has all the signs of a significant, emerging pathogen,” said Constance Hausman, a biologist at Cleveland Metroparks.
Scientists are gearing up to fight back, but they face a major challenge: Nobody knows what beech leaf disease is. Searches for a virus, bacteria or fungus — all common tree pathogens — have come up empty. Researchers are facing an arboreal murder mystery.
BY ADELE PETERS
Spinnova has found a way to spin any cellulose–wood, potato peels, even old T-shirts–into new, strong fiber.
In a new pilot factory in Jyväskylä, Finland–a city surrounded by forests and known in part for its lumber and paper industries–a startup will soon begin to turn wood pulp into something new: a type of fabric that could eventually compete with cotton.
Making wood into fabric isn’t new, but older wood-based fabrics like rayon use harsh chemicals that can pollute water and poison workers. The new fabric, made by a startup called Spinnova, uses a mechanical process instead of chemicals; the only byproduct is evaporated water, which is reused in production. Unlike cotton, which uses massive amounts of water in areas often prone to droughts, it needs little water, no pesticides, and no farmland.
The new process uses FSC-certified wood pulp that’s ground into a gel-like material called microfibrillated cellulose, which is made of tiny fibers. The material flows through the startup’s patented machinery to create a network of fibers that are spun and dried into a fluffy, firm wool that can be knit or woven into fabric and then made into clothing, shoes, or other textiles.
by Tony Schick
The West is in the midst of another intense fire season. Fires in California and Oregon have claimed lives and homes and burned up farmland.
As part of EarthFix’s ongoing series on wildfire, reporter Tony Schick spoke with interim Forest Service Chief Vicki Christiansen about what her agency is doing to reform fire management and reverse the fire problem.
Christiansen discussed her agency’s approach to wildfire management and what she’s doing to reduce the damage from wildfires in the future. Below are some of her responses on these issues, edited for length and clarity.
As EarthFix reported, the Forest Service still suppresses nearly all fires, decades after recognizing the danger in that practice. Wildland fire agencies currently spend millions fighting relatively low-risk fires that could actually help protect communities if allowed to burn a bigger footprint. Researchers within the Forest Service are trying to push wildland fire management toward more data-driven decisions that consider the long-term tradeoffs of fire suppression. Asked what she’s doing to implement that throughout the agency, Christiansen said she was trying to build more acumen for risk management and reset the agency’s thinking.
“We are successful at extinguishing 98 percent of all fires. But there’s 2 percent that, I call them hurricane fires. We don’t ask public safety officials to stop a hurricane. We ask them to get people out of harm’s way, to provide assistance to mitigate, create resilience, etc. Well that’s the situation we are in. But we are asking many of our responders to take aggressive action when there is zero probability of success.
“So our reset is about thinking about (the) probability of success, and just the first line — all fire is bad and we must stop it. Why are we exposing responders, not doing our work to get people out of harm’s way, spending all kinds of public funds, when the probability of success is zero to very low. That’s the first level of the reset.”
By JOHN McCOY
“Fifty inches in diameter,” Doug Wood said as he read the number off the tape measure. “That means this poplar tree is probably at least 200 years old, maybe 250. That puts it into the old-growth category.”
Old growth? Wait a minute. For years, West Virginians have been told that the state’s only remaining old-growth forest tracts are in Cathedral State Park and the Monongahela National Forest’s Gaudineer Knob Scenic Area. Wood believes there are more old-growth stands scattered throughout the state, perhaps many more.
“Based on criteria established by the U.S. Forest Service, there are plenty of places in West Virginia that qualify as secondary old-growth forest, where the forest has grown back up after being logged,” he said. “Several areas of secondary old growth have already been identified, and I’m convinced that more will be found.”
The poplar tree Wood measured stood in Kanawha State Forest, just a few minutes’ drive from the hustle and bustle of downtown Charleston – hardly a place one would expect to find old-growth forest. Wood said a sizable portion of the forest’s northern end contains many such trees.
“So far, we’ve found tracts on several pieces of public land that have old-growth characteristics,” he continued. “Here in Kanawha State Forest, but also in Watoga, Cedar Creek, Twin Falls, Cacapon, North Bend, Holly River and Beech Fork state parks.”
Wood, a retired Department of Environmental Protection water-quality official, is helping spearhead an effort to identify old-growth tracts, particularly on public lands. He scours the woods looking for big trees and the signs of old-growth habitat that surround them. When he finds a likely tract, he notifies the Old Growth Network of its presence.
“The Old Growth Network is a non-profit group interested in helping designate old-growth areas,” Wood explained. “They like the effort to be driven by the local citizenry, so they have county coordinators to help get citizens interested in identifying old-growth tracts.”
Wood said the recent effort by Gov. Jim Justice and his administration to open state parks to timbering has helped give rise to the grass-roots effort to protect any old-growth areas that might exist within those parks.
By Emily Pollock
M-Fire’s fire-inhibiting wood looks increasingly important in an industry turning back to wood buildings.
The phrase “wood buildings” conjures up images of flammable, unsafe architecture, but M-Fire Suppression Inc. is looking to change that picture. And it wants its fire-resistant wood to be the new face of ecologically friendly building.
One of the most common tests of a material’s fire resistance is a spread test, where inspectors measure how long it takes fire to spread across the material as compared to control materials. Class A is the most fire-resistant class, and M-Fire is currently the only company making Class A fire-protected cross-laminated timber. To do that, the company infuses wood with surfactants that allow fire inhibitors to migrate into the pockets of oxygen in the wood. The result is a product much eco-friendlier than most traditional fire inhibition. M-Fire is currently the only Class A fire inhibitor with UL Greenguard Gold certification, which means that it’s safe around children and schools.
“We don’t even like the name fire retardant near our brand. We’re a fire inhibitor,” said Steve Conboy, the company’s chairman and general manager. “What happens is, we inhibit fire because we break the chemical reaction in the fire.” The inhibitor breaks the chain of free radicals (H+, OH- and O-) released during combustion, giving the fire nothing to feed on.
The fire protection results in what Conboy calls “defended carbon”: carbon that is stored in the wood and will never be released into the atmosphere. A carbon-absorbing building material gives M-Fire’s wood a distinct advantage over carbon-producing alternatives like structural steel.