By Neil Carter
Tigers are one of the world's most iconic wild species, but today they are endangered throughout Asia. They once roamed across much of this region, but widespread habitat loss, prey depletion and poaching have reduced their numbers to only about 4,000 individuals. They live in small pockets of habitat across South and Southeast Asia, as well as the Russian Far East — an area spanning 13 countries and 450,000 square miles (1,160,000 square kilometers).
Letting Humans In<p>Road construction <a href="http://tigers.panda.org/news/asias-infrastructure-development-threatens-worlds-tigers/" target="_blank">worsens existing threats to tigers</a>, such as poaching and development, by paving the way for human intrusion into the heart of the tiger's range. For example, in the Russian Far East, roads have led to <a href="https://doi.org/10.1111/j.1469-7998.2008.00458.x" target="_blank">higher tiger mortality</a> due to increased collisions with vehicles and more encounters with poachers.</p><p>To assess this threat across Asia, we focused on areas called Tiger Conservation Landscapes — 76 zones, scattered across the tiger's range, which conservationists see as crucial for the species' recovery. For each zone we calculated road density, distance to the nearest road and relative mean species abundance, which estimates the numbers of mammals in areas near roads compared to areas far from roads. <a href="https://doi.org/10.1073/pnas.1522488113" target="_blank">Mean species abundance</a> is our best proxy for estimating how roads affect numbers of mammals, like tigers and their prey, across broad scales.</p><p>We also used <a href="https://doi.org/10.1088/1748-9326/aabd42" target="_blank">future projections of road building</a> in each country to forecast the length of new roads that might be built in tiger habitats by 2050.</p>
More Roads, Fewer Animals<p>We estimated that more than 83,300 miles (134,000 kilometers) of roads already exist within tiger habitats. This is likely an underestimate, since many logging or local roads are missing from the global data set that we used.</p><p>Road densities in tiger habitat are one-third greater outside of protected areas, such as national parks and tiger reserves, than inside of protected areas. Non-protected areas averaged 1,300 feet of road per square mile (154 meters per square kilometer), while protected areas averaged 980 feet per square mile (115 meters per square kilometer). For tiger populations to grow, they will need to use the forests outside protected areas. However, the high density of roads in those forests will jeopardize tiger recovery.</p><p>Protected areas and priority conservation sites — areas with large populations of tigers — are not immune either. For example, in India — home to more than <a href="https://www.npr.org/2019/07/29/746237332/census-finds-nearly-3-000-tigers-in-india" target="_blank">70% of the world's tigers</a> — we estimate that a protected area of <a href="https://en.wikipedia.org/wiki/Tiger_reserves_of_India" target="_blank">500 square miles, or 1,300 square kilometers</a>, contains about 200 miles (320 kilometers) of road.</p><p>Road networks are expansive. More than 40% of areas where tiger breeding has recently been detected — crucial to tiger population growth — is within just 3 miles (5 kilometers) of a nearby road. This is problematic because <a href="https://doi.org/10.1016/j.biocon.2010.02.009" target="_blank">mammals often are less abundant</a> this close to roads.</p><p>In fact, we estimate that current road networks within tiger habitats may be reducing local populations of tigers and their prey by about 20%. That's a major decrease for a species on the brink of extinction. And the threats from roads are likely to become more severe.</p>
Estimated road densities for 76 tiger conservation landscapes (colored zones), with darker red indicating more roads per unit area. Neil Carter / CC BY-ND
Making Infrastructure Tiger-Friendly<p>Our findings underscore the need for planning development in ways that interfere as minimally as possible with tiger habitat. Multilateral development banks and massive ventures like the Belt and Road Initiative can be important partners in this endeavor. For example, they could help establish an international network of protected areas and habitat corridors to safeguard tigers and many other wild species from road impacts.</p><p>National laws can also do more to promote <a href="https://openknowledge.worldbank.org/handle/10986/27751" target="_blank">tiger-friendly infrastructure planning</a>. This includes keeping road development away from priority tiger populations and other "no go" zones, such as tiger reserves or habitat corridors.</p><p>Zoning can be used around infrastructure to prevent settlement growth and forest loss. Environmental impact assessments for road projects can do a better job of assessing how new roads might exacerbate hunting and poaching pressure on tigers and their prey.</p><p>Funding agencies need to screen proposed road developments using these tiger-friendly criteria before planners finalize decisions on road design, siting and construction. Otherwise, it might be too late to influence road planning.</p><p>There are also opportunities to reduce the negative effects of existing roads on tigers. They include closing roads to vehicular traffic at night, decommissioning existing roads in areas with important tiger populations, adding road signs announcing the presence of tigers and constructing wildlife crossings to allow tigers and other wildlife to move freely through the landscape.</p><p>Roads will become more pervasive features in Asian ecosystems as these nations develop. In my view, now is the time to tackle this mounting challenge to Asian biodiversity, including tigers, through research, national and international collaborations and strong political leadership.</p>
By Mikhail Chester, Braden Allenby and Samuel Markolf
The most recent international report on climate change paints a picture of disruption to society unless there are drastic and rapid cuts in greenhouse gas emissions.
Although it's early days, some cities and municipalities are starting to recognize that past conditions can no longer serve as reasonable proxies for the future.
EcoWatch Daily Newsletter
By Nexus Media, with William F. Laurance
Humans are ravaging tropical forests by hunting, logging and building roads and the threats are mounting by the day.
China is planning a series of massive infrastructure projects across four continents, an initiative that conservation biologist William Laurance described as "environmentally, the riskiest venture ever undertaken."
By Sam Schipani
Since the early days of his campaign for president, Donald Trump has been promising to make major investments in infrastructure. While the president has not been able to push his $1.5 trillion infrastructure package through Congress, during the past few months lawmakers have moved forward with small pieces of legislation aimed at improving infrastructure, including a water infrastructure bill that recently passed the Senate with bipartisan support. Legislation to improve infrastructure often enjoys support from both sides of the aisle, but environmental groups have been keeping a close eye on the Republican House to see whether these bills will sneak in any the president's proposed changes to the National Environmental Policy Act or NEPA.
From doping scandals to security concerns, the 2016 Olympic Games in Brazil has been embroiled by one crisis after another—and that's just the tip of the iceberg.
As athletes and hundreds of thousands of tourists around the world descend into Rio de Janeiro, here are seven health and environmental controversies that have already made headlines before the Aug. 5 Opening Ceremony.
The polluted Guanabara bay in Rio where rowing and sailing will be held.Flickr
1. Polluted Waterways
Rio's epic water pollution has been going on for two decades due to a lack of modern sanitation programs. Despite Olympic organizers's promise to clean the city's waterways at their 2009 bid, trash, raw sewage and even body parts have been a presence at water sport venues.
At Guanabara Bay—where rowing and sailing will be held—tons of noxious raw sewage gets pumped into the bay each day. Oceanographer David Zee told CBS News that the Brazilian government planned to install eight treatment plants on Rio's polluted rivers but only built one. Officials promised to treat 80 percent of the sewage flowing into the bay but have gotten to only half. USA Today Sports reported that organizers will use a short-term and (purely cosmetic) water treatment method so the waters will glisten blue for television broadcasts.
In fact, Rio's Olympics will bring none of the environmental improvements that were originally pitched. An official from Brazil's Federal Audit Court, which audits the federal government's spending, told Reuters: "As for now, we have nothing relevant to report about what was done in the environmental area."
2. Super Bacteria
In related news, last year, the Associated Press published its results from an eight-month study of Rio's water venues, concluding that none were safe for swimming or boating, with more than 1 billion viruses from human sewage in a single liter of water from the Rodrigo de Freitas Lake. Water samples were 1.7 million times the level of what would be considered hazardous on a Southern California beach.
Antibiotic-Resistant Bacteria Found in Rio de Janeiro Waterways Ahead of Olympics https://t.co/0cfXUAMHkD @EARTHWORKS @GreenpeaceAustP— EcoWatch (@EcoWatch)1465939210.0
That leads us to this conundrum. As EcoWatch mentioned last month, antibiotic-resistant super bacteria has been found in waters that will host the swimming portion of the triathlon and in the lagoon where rowing and canoe athletes will be competing. Two studies have connected five beaches—Copacabana, Ipanema, Leblon, Botafogo and Flamengo—and the Rodrigo de Freitas to the superbug bacteria. Scientists say the super bacteria can cause hard-to-treat urinary, gastrointestinal, pulmonary and bloodstream infections, which contribute to death in up to half of infected patients. Meningitis has also been linked to exposure to the superbug.
A number of high-profile athletes, especially golfers, have dropped out of the Summer Games due to Zika fears. The mosquito-borne virus, which has spread throughout the South American country, has been declared an international public health emergency by the World Health Organization. Some scientists have suggested that global warming is exacerbating the problem, which is linked to microcephaly in babies. Infectious diseases, such Zika and dengue, could spread as aedes aegypti mosquitoes expand their habitats in a warmer, wetter world, one study found. Experts, however, have said that there is little risk of Zika spread. The southern hemisphere is also currently in the middle of winter, making the threat of bites even lower. Still, the epidemic has only further impaired Brazil's struggling public health system, and will continue be a problem when the games conclude.
4. Golf Course Trampling on Nature
Golf's return to the Olympics should have been celebrated. However, not only are some of the sport's biggest stars skipping Rio due to Zika, instead of using the city's two existing golf courses, organizers decided to build a completely new one from scratch. Biologist and environmental activist Marcello Mello told the Guardian that the new course encroaches on the Marapendi reserve, home to rare butterflies, pines and other species not found anywhere else in the world, calling the construction an "environmental crime."
"They are destroying the Atlantic Forest, which is part of our national heritage," he added. Mello also alleges that the city is using the Olympics to help foster business for development companies. "Without a doubt, the Olympics are a giant real estate scam," he said. This is not to mention that thousands of people living in Rio's favelas have been notoriously pushed out of their homes for Olympic construction.
5. Jaguar Killing
Last month, a jaguar—the Brazilian Olympic team's mascot—was shot and killed at the Olympic torch passing ceremony. As EcoWatch reported, the female jaguar was shot after the female jaguar escaped from her handlers, sparking outcry from animal activists.
"Wild animals held captive and forced to do things that are frightening, sometimes painful and always unnatural are ticking time bombs—captivity puts animal and human lives at risk," the People for the Ethical Treatment of Animals wrote in a blog post.
Jaguars are a near-threatened species with an estimated 15,000 left in the wild, according to Defenders of Wildlife.
Jaguar Shot Dead After #Olympics Torch Passing Ceremony in #Brazil https://t.co/IAMUOZuBQM #Olympics2016 #Rio2016 #RioOlympics— EcoWatch (@EcoWatch)1466615079.0
6. Public Transportation Mishaps
When Rio organizers made their bid for the summer games seven years ago, they suggested a number of improvements to ease the city's terrible traffic, which causes severe congestion, noise and air pollution from vehicle exhausts. However, the organizers probably did not anticipate that a crippling recession would affect their plans. The city's government declared a state of financial disaster last month, impacting Olympics-related infrastructure projects.
Rio's new 10-mile rail line, which cost $1.2 billion more than its initial estimate, may not be completed in time before the opening ceremony. A bike lane collapsed in April, killing two people. And according to the Associated Press, the new light rail system suffered a major power outage on the second day of service and the month-old highway near Barra da Tijuca is already damaged with potholes and large cracks.
7. The Danger of Environmental Activism
Protesting any of the environmental or health issues above might be a danger in itself. Brazil happens to be the nation of the highest death toll of environmental activists. Global Witness revealed 50 confirmed murders of environmental activists last year.
"I know there is a risk to this work. It is dangerous to campaign for the environment in Brazil," Mello told the Guardian about his Occupy Golf Campaign. "But I love nature and somebody has to do this job. If I die for this cause, it will be worth it."
On Jan. 31, Rep. John Mica (R-FL), chairman of the House of Representatives Transportation and Infrastructure Committee, officially introduced a major transportation reauthorization bill. The overall plan for the bill includes proposals to open the Atlantic and Pacific coasts as well as the pristine Arctic National Wildlife Refuge to drilling, and to open landscapes in Colorado, Utah and Wyoming to oil shale extraction. At the same time, it cuts all funding for biking and walking safety and cripples environmental review for transportation projects. On top of this, Speaker of the House John Boehner (R-OH) has said that he would attach approval of the Keystone XL tar sands pipeline to this bill if it were not otherwise immediately approved. John Cross, federal transportation advocate with Environment America, issued the following response:
“Transportation is responsible for one-third of our global warming pollution and two-thirds of our dangerous dependence on oil, but it doesn’t have to be this way—we can invest in clean, efficient travel choices such as public transit that will move our nation away from oil and toward a brighter, healthier future. These projects, such as expanded and improved bus and rail systems as well as biking and walking pathways, give commuters the chance to escape our heavily congested highways and choose smarter, cleaner transportation options that clean up our air and get our nation off oil.
“The bill introduced by Rep. Mica today in the House of Representatives drives us down to the dead end of too many oil spills, too much air pollution, and destroying the places we love. It reads like a wish list for Big Oil, including:
- Deepening our oil dependence—slashing programs for biking and walking safety, while continuing to underfund transit
- Destroying our most pristine wilderness areas—drilling in protected places like the Arctic National Wildlife Refuge, and opening development for even dirtier, more hazardous sources of oil like oil shale extraction in Colorado, Wyoming and Utah that will endanger nearby drinking water while destroying landscapes and pumping out air pollution at truly alarming rates
- Pumping Toxic Tar Sands into the U.S.—Speaker Boehner has stated that he would attempt to force the approval of the Keystone XL tar sands pipeline through this bill, further deepening our addiction to ever more toxic, high risk forms of oil.
“America needs a smarter, cleaner transportation future, not this destructive proposal that drives us down a road to deeper, more damaging oil dependence. The House of Representatives should reject this bill.”
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