18 Feb 2015:
Disease-Carrying Ticks Expand
Range and Emerge Earlier in Warmer Climate
Warmer spring temperatures in the northeastern U.S. are leading to shifts in the emergence of ticks that carry Lyme
Adult blacklegged tick
disease, and milder weather is allowing ticks to spread into new geographic regions, according to findings published
this week. The data — which span 19 years and include observations of more than 447,000 ticks — show that the insects emerged nearly three weeks earlier in warmer years. And when fall temperatures were mild, a smaller percentage of larval ticks entered dormancy and waited until spring to feed, the study found. "Here in the Northeast, warming is already having an effect, and people need to be tick-vigilant before May, as potentially infected nymphal ticks are searching for their blood meals earlier and earlier," said co-author Richard S. Ostfeld, an ecologist at the Cary Institute.
Interview: Why Ocean Health Is
Better, and Worse, Than You Think
In a recent groundbreaking study in Science
, a group of marine experts — including lead author Douglas
McCauley — delivered a sobering message: The world’s oceans are on the verge of major change that could cause irreparable damage to marine life. While ocean ecosystems are still largely intact, the marine world is facing unprecedented disturbances, including ocean acidification and habitat destruction from deep-sea mining, oil and gas drilling, development, and aquaculture. In an interview with Yale Environment 360
, McCauley discusses the parallels of the loss of wildlife on land and at sea and explains why creating marine reserves and establishing international ocean zoning regulations would help blunt the damage from a looming “marine industrial revolution.”
Read the interview.
12 Feb 2015:
Mange in Yellowstone Wolves
Documented Through Thermal Images
Researchers with the U.S. Geological Survey are using thermal video cameras to study how mange is affecting
Thermal image of a wolf with mange on its legs.
wolves in Yellowstone National Park, as shown in this video
. Mange is a highly contagious skin disease caused by mites that burrow into the skin of dogs and wolves, causing infections, hair loss, irritation, and intense itching. The urge to scratch can be so overwhelming that the wolves neglect resting and hunting, researchers say
, leaving them vulnerable to hypothermia, malnutrition, and dehydration, which can eventually lead to death. Thermal imagery allows scientists to document the extent of hair loss and the actual loss of heat associated with different stages of infection. Red patches on a wolf's legs, as shown in this image, indicate rapid heat loss caused by mange.
As Arctic Ocean Ice Vanishes,
Questions About Future Fishing
With the steady retreat of sea ice in the Arctic Ocean opening up vast areas of this long-frozen marine basin, a key resource
A Russian fishing vessel trawls the Arctic Ocean.
issue is now emerging: the future of fisheries, especially in central Arctic waters. What species are migrating into the region as sea ice disappears? And could the heart of the Arctic Ocean sustain a commercial fishery in the coming decades? These issues were central to a discussion at a recent conference on the fisheries of the central Arctic Ocean. With more southerly fish species migrating into warmer and increasingly ice-free regions of the Arctic Ocean, officials from the U.S. and Canada say it’s important to negotiate an international agreement on fishing before allowing fisheries to open.
Read the article.
06 Feb 2015:
Maine’s Iconic Lobsters
Face Threats From Ocean Acidification
Maine’s lobster fishery, worth $1.7 billion
to the state and a vital source of employment, could be
threatened by acidifying ocean waters
A Maine lobster
and rising sea temperatures, according to a new report. The report
, issued by a state commission, called increasingly acidic ocean waters — caused by the absorption of CO2 from the atmosphere — an “urgent matter” that needs to be addressed by state and local governments and the fishing infustry. Facing the prospect that increasing acidity could interfere with the ability of lobsters to make their shells, the commission set forth a handful of goals, including a stepped-up research effort on the acidification of the coast’s waters and its impact on crustaceans. Maine lawmakers have already introduced legislation for limits on industrial and agricultural runoff, which contribute to coastal water acidification.
04 Feb 2015:
Plant-Like Sea Slug Can Steal
Genes From its Food, Researchers Report
The emerald green, leaf-shaped sea slug known as Elysia chlorotica
can live for months at a time by
photosynthesizing its own food, like a plant does, but until recently scientists did not understand how the slug acquired and maintained this rare ability. A recent report in the journal The Biological Bulletin
shows that the slug steals genes and chloroplasts
— the cellular machinery that converts sunlight into food — from algae that the slug eats. Genes lifted from the algae can maintain cholorplasts in the slug for up to nine months, the researchers say — much longer than the chloroplasts would last in the algae themselves. Moreover, the slug can pass on those stolen genes to its offspring. The process is a mechanism of rapid evolution, says one of the study's authors.
28 Jan 2015:
Camera Trap Records Rare
Glimpse of African Golden Cat Hunting
An African golden cat, one of the least known and most elusive wild cats on the planet, has been filmed hunting in
African golden cat
Kibale National Park, Uganda, for the first time, scientists say. In the video
, which was recorded by a camera trap, an African golden cat darts toward a group of red colobus monkeys feeding on a tree stump. The cat's attack is nearly too fast to be seen in real-time, but viewing the footage in slow-motion highlights the cat's swiftness and accuracy — even though its ambush failed to land a meal. The African golden cat is found only in the forests of central and West Africa, and it is threatened across its range by intensive bushmeat hunting and habitat loss. Researchers say the video provides important details about the African golden cats' hunting behavior that have never before been directly observed.
27 Jan 2015:
Pollinator Loss Could Put
Poor Nations at Risk for Malnutrition
Declining pollinator populations could leave as many as half of the people in developing countries facing nutritional deficiencies, according to
researchers from the University of Vermont and the Harvard School of Public Health. In the study — the first to link pollinator declines directly to human nutrition — researchers collected detailed data about people's daily diets in parts of Zambia, Mozambique, Uganda, and Bangladesh. They found that in Mozambique, for example, many children and mothers are barely able to meet their needs for micronutrients, especially vitamin A, which is important for preventing blindness and infectious diseases. Fruits and vegetables were an important source of that nutrient for many people in the study, and those crops are highly dependent on pollinators, researchers say — for example, yields of mangoes, which are high in vitamin A, would likely be cut by 65 percent without them. Pollinator losses might also lead to folate deficiency, they say, which is associated with neural tube defects.
23 Jan 2015:
South Africa Relocates Rhinos
After Record Number Were Poached in 2014
Unable to curb poaching of rhinos within its borders, the South African government has relocated 100 rhinos
A white rhino in Kruger National Park.
in an effort to stem the illegal slaughter of the animals, Reuters reports. For security reasons, officials did not reveal to which countries the rhinos had been relocated. An additional 56 rhinos were moved from poaching hotspots within South Africa's Kruger National Park — where two-thirds of the killings happen — to an "intensive protection zone" within Kruger, officials said. Poachers killed a record number of the animals in South Africa last year — 1,215 rhinos, up 20 percent from the 2013 total — and 49 have been killed so far this year. The animals are hunted intensely because their horns, which some Asian cultures incorrectly believe contain medicinal properties, are worth an estimated $65,000 per kilogram on the black market.
21 Jan 2015:
Filtering Polluted Stormwater
Through Soil Can Protect Salmon, Study Says
Filtering polluted runoff from urban areas through a simple soil mixture dramatically reduced the water's toxic metal and
A pair of coho salmon.
hydrocarbon content and made it safe for coho salmon and the insects they eat, according to new research
. Scientists collected polluted runoff from a four-lane highway in Seattle, then filtered part of the water through a mixture of sand, compost, and shredded bark. Coho salmon and aquatic insects thrived in the filtered stormwater, but they quickly died in the unfiltered water, researchers reported in the journal Chemosphere
. Chemical analyses showed that filtering the water through the soil mixture reduced toxic metals by 30 to 99 percent, polyaromatic hydrocarbons to levels at or below detection, and organic matter by more than 40 percent. The research supports the use of rain gardens and other natural stormwater filtration systems, the authors say.
20 Jan 2015:
Genetic Diversity Is Key To
Food Stability in Changing Climate, UN Says
As climate change advances, much more should be done to study, preserve, and take advantage of the biological diversity
Wild red rice is hardier than cultivated varieties.
underpinning world food production, according to
a new report by the United Nations Food and Agriculture Organization (FAO). Between 16 and 22 percent of current crop species — including 61 percent of peanut and 12 percent of potato species — could become extinct in the next 50 years, the report notes. Wild strains, which are often better at adapting to environmental changes, will become increasingly important
for feeding the global population, which is expected to grow by 3 billion people by 2050, the report says. Strengthening gene and seed banks, improving breeding practices, increasing genetic diversity on farms and in fields, and preserving soil microbiomes
will be key to boosting crops' climate resilience, the FAO said.
Interview: How Chinese Tiger Farms
Threaten Wild Tigers Worldwide
The number of tigers living in the wild has dropped to the shockingly low figure of 3,200, down from 100,000 a century ago.
But nearly as shocking is this statistic: An estimated 5,000 to 6,000 tigers are being legally farmed today in China, their bones steeped in alcohol to make tiger bone wine, their meat sold, and their skins turned into rugs for members of China’s wealthy elite. In an interview with Yale Environment 360
, wildlife activist Judith Mills makes a passionate case against tiger farming, explaining how these magnificent creatures are bred like cattle for their body parts, how some conservation groups have chosen not to confront the Chinese government about the farms, and how tiger farming poses a direct threat to the world’s remaining wild tigers because increased availability of these bones and pelts fuels demand that strengthens the incentive to poach wild tigers.
Read the interview.
Interview: Giving Local Women
A Voice in Grass-Roots Conservation
The roles of women in traditional societies can be quite different from men’s, and their knowledge of the
natural world and the way in which conservation projects affect them may also be different. But these variables aren’t necessarily taken into account when developing such projects. The results can range from missed opportunities to project failure. Earlier this year, Conservation International began piloting guidelines to help integrate gender considerations into its community projects — an initiative that Kame Westerman, the "gender advisor" for that organization, helped develop. In an interview with Yale Environment 360
, Westerman discusses these guidelines, as well as the perils of ignoring gender when planning conservation initiatives.
07 Jan 2015:
Federal Judge Halts Hunting
And Trapping of Great Lakes Gray Wolves
A federal judge has stopped
the hunting and trapping of gray wolves in the Upper Midwest,
following their removal from the U.S. Endangered Species List in 2012 by the Obama administration. In the ruling, which affects gray wolf populations in Minnesota, Wisconsin, and Michigan — the so-called Great Lakes wolf population — the judge called the delisting of the wolves “arbitrary and capricious” and said it violated the Endangered Species Act
. The order came roughly three years after federal protections for the wolves were dropped by the U.S. Fish and Wildlife Service. Since then, the states have each held hunting seasons, resulting in 923 gray wolves killed in Minnesota, 654 in Wisconsin, and 22 in Michigan for a total of 1,599 killed. Researchers estimate that roughly 3,700 gray wolves live in the Great Lakes region.
06 Jan 2015:
Penguin Watch Projects Asks
Citizen Scientists to Monitor Birds' Habits
, a citizen science project launched by researchers from the University of Oxford in the U.K., is enlisting the
Group of Gentoo penguins
public's help in counting penguins in some 175,000 photos from locations across the Southern Hemisphere. Researchers are monitoring five penguin species — Gentoo, Chinstrap, Adelie, Rockhopper, and King penguins — and recording information on the number of adults, chicks, and eggs, as well as their winter behavior, breeding success, and travel habits. The project is especially useful for monitoring penguins' winter behavior, for example, because it's logistically difficult for the researchers to visit these locations in winter, they say
, and the images are far too numerous for researchers to view on their own. Understanding how the penguins live day-to-day should help shed light on how the penguins will respond to an increasingly volatile climate, the team says.
04 Dec 2014:
Arabian Sea Whales Are Earth's
Most Isolated and Endangered Population
Humpback whales inhabiting the Arabian Sea are the most genetically distinct humpback whales and may be
the most isolated population on earth, researchers report
. With fewer than 100 estimated individuals, they are "definitely the most endangered" population of humpbacks, said Wildlife Conservation Society researcher Howard Rosenbaum. The Arabian humpbacks' known range is limited to waters near Yemen, Oman, the United Arab Emirates, Iran, Pakistan, and India, and possibly the Maldives and Sri Lanka, researchers say. Genetic data suggest they have remained separate from other humpback whale populations for 70,000 years — extremely unusual in a species famed for annual migrations of 9,000 kilometers or more. The genetic separation is likely reinforced by their breeding schedule, researchers say. While Arabian humpbacks breed on a northern hemisphere schedule, their closest neighbors breed on a southern schedule.
24 Nov 2014:
Record Number of Rhinos Poached In South Africa, Government Says
South African officials have announced that 1,020 rhinos have been killed so far in 2014 — a total that
White rhino in South Africa
surpasses last year’s record slaughter of 1,004 of the endangered animals. Poaching has been on the rise in South Africa, home to the world’s largest population of rhinos, since 2007, when only seven rhinos were killed. The sharp increase is occurring despite steps by the government to improve enforcement and introduce new technologies and intelligence-gathering methods to curb poaching, Mongabay reports
. As of 2010, South Africa was home to more than 18,000 white rhinos — over 90 percent of the global population — and nearly 2,000 black rhinos. The animals are being killed for their horns, which are in high demand in China and Vietnam for their supposed, but unproven, medicinal qualities.
Interview: Bringing Civility and Diversity to Conservation Debate
For the past few years, an acrimonious debate has been ranging between two camps of conservationists. One faction
advocates protecting nature for its intrinsic value. The other claims that if the degradation of the natural world is to be halted, nature’s fundamental value — what nature can do for us
— needs to be stressed. The tone of the rhetoric has led to a petition, published this month in the journal Nature
, that criticizes both sides for indulging in ad hominem attacks and unproductive arguments that have devolved into “increasingly vitriolic, personal battles.” In an interview with Yale Environment 360
, Jane Lubchenco, former head of the National Oceanic and Atmospheric Administration, explains why she and her co-signatories are calling for a more “inclusive conservation” and why the bickering needs to stop. Read more.
07 Nov 2014:
Organized Chinese Crime Behind Tanzania's Elephant Slaughter, Report Says
Chinese-led criminal organizations have been conspiring with corrupt Tanzanian officials to traffic huge amounts
Poached elephant skull in Selous Reserve
of ivory — a trade that has caused half of Tanzania’s elephants to be poached in the past five years — according to a report
by the London-based Environmental Investigation Agency. In some cases, Chinese military officials appeared to be complicit in the illegal activities, the report says, and in other instances, prominent Tanzanian businessmen and politicians helped protect ivory traffickers. Tanzania is the largest source of poached ivory in the world, and China is the largest importer of smuggled tusks, according to EIA. Tanzania’s famed Selous Reserve saw its elephant population plunge by 67 percent in four years, from 50,000 animals to 13,000. Tanzania appears to have lost more elephants to poaching during this period than any other country, EIA said.
Interview: Saving World’s Oceans Begins With Coastal Communities
Aggressively curbing overfishing, pollution, and development is something coastal communities
can do immediately to protect their ocean resources — and with dramatic results — says marine biologist Ayana Elizabeth Johnson. As the executive director of the Waitt Institute
, an ocean conservation organization, Johnson recently put that approach to the test on the Caribbean island of Barbuda. In an interview with Yale Environment 360
, she discusses how she helped Barbuda craft rules to protect its ocean resources and why she favors community-driven conservation efforts over more top-down approaches.
Read the interview.
31 Oct 2014:
Giant Galapagos Tortoises Are Making a Strong Comeback, Researchers Say
Giant Galapagos tortoises have made a remarkable comeback over the last five decades, and their
Giant Galapagos tortoise (Chelonoidis hoodensis)
population on the Galapagos island of Española is now secure, according to
researchers from the U.S. and Ecuador. Although their global population was down to 15 individuals in the 1960s, after 40 years of captive breeding and reintroduction efforts, the species now numbers roughly 1,000, the study
found. About half of the tortoises released on the island since 1975 were still alive in 2007, and they’re now reproducing on their own in the environment. Ecologically, though, the tortoises face some challenges, the study notes. A critical source of food is a native cactus species that was nearly wiped out by feral goats. This likely limits the tortoises' current range, but the reptiles are also aiding the return of the cactus, the scientists say, because they help to spread its seeds.
29 Oct 2014:
Weather and Climate Key in Weights of Penguin Chicks, Researchers Say
Local weather and large-scale climate trends have the largest impact on the weights of Adélie penguin chicks
An adult Adélie penguin feeds its chick.
— not food availability — according to
researchers at the University of Delaware. Adélie penguins are native to the West Antarctic Peninsula, and their habitat is warming faster than most other parts of the planet. Looking at records dating back to 1987, scientists found that year-to-year changes in local weather — including wind speed, temperature, rain, and humidity — could cause chicks’ weights at the time they leave their nests to fluctuate by up to 7 ounces. That’s often the difference between a surviving and non-surviving chick, the researchers say. Biologists previously thought that food sources and parenting played the largest role in chicks’ health, but these findings
suggest that exposure to elements is more important. The study "calls into question what happens to an ecosystem when you change climate quickly," principal investigator Matthew Oliver said.
23 Oct 2014:
Drones Can Help Map Spread
Of Infectious Diseases, Researchers Say
Aerial drones can help track changes in the environment that may accelerate the spread of
Researchers in Malaysia program a drone
infectious diseases, an international team of researchers writes in the journal Trends in Parasitology
. Land use alterations, such as deforestation or agricultural changes, can affect the movement and distribution of people, animals, and insects that carry disease, the authors explain. One drone project, for example, tracked changes in mosquito and monkey habitats in Malaysia and the Philippines. By combining land-use information collected by drones with public health data, researchers there are hoping to better understand how changes in the environment affect the frequency of contact between people and disease vectors like mosquitoes and macaques, both of which can harbor the malaria parasite.
In East Coast Marshes, Goats
Take On a Notorious Invader
Land managers in the eastern U.S. and Canada have spent countless man-hours and millions of dollars trying to tame a pernicious, invasive reed known as Phragmites australis
. Toxic herbicides, controlled burns, and even bulldozers have been the go-to solutions to the problem. But recent research out of Duke University suggests another, less aggressive fix: goats. The approach is finding practical applications, including in New York City, where officials deployed a herd of goats at Staten Island’s Freshkills Park.
21 Oct 2014:
Desert and Mediterranean Plants
More Resistant to Drought than Expected
Desert and Mediterranean ecosystems may be more resistant to climate change, particularly long-term
Plants in a Mediterranean ecosystem in Chile.
drought, than previously thought, a new study published in Nature Communications
shows. Over the course of a nine-year experiment, researchers subjected plants in four different climatic zones to rainfall conditions predicted under future climate change scenarios. The ecosystems typically received 3.5 to 30.7 inches of precipitation annually, and researchers cut that total by roughly 30-percent to simulate drought conditions. Surprisingly, the researchers found no measurable changes in plant biomass, density, or species composition and richness in any of the four ecosystems over the course of nine generations of plants. The ecosystems already receive highly variable amounts of rainfall and the 30-percent drop likely falls within the plants’ natural "comfort zone," the researchers say, which could explain the unexpected resilience to drought.
E360 Video Winner: Intimate Look
“Peak to Peak,”
At the Bighorn Sheep of the Rockies
the third-place winner of the Yale Environment 360 Video Contest, focuses on a herd of bighorn sheep in Montana and features remarkable scenes of lambs as they gambol along the slopes of the northern Rockies. Produced by Jeremy Roberts, the video follows a field biologist as he monitors the sheep and talks about the possible impact of climate change on the animals’ future.
Watch the video.
13 Oct 2014:
Climate Change To Make Many
Fish Species Extinct in Tropics, Study Says
Climate change is likely to drive fish and marine invertebrates toward the poles and cause extinctions
near the tropics, according to
researchers at the University of British Columbia. Under the conservative climate change scenario of one degree Celsius of warming by 2100, the 802 species modeled in the study
are predicted to move away from their current habitats by as much as 9 miles, or 15 kilometers, every decade — a rate similar to what scientists have observed over the past few decades. Under the worst-case scenario of three degrees of warming, the researchers predict marine species will move toward the poles at a rate of 26 kilometers per decade. Under that scenario, an average of 6.5 species per 0.5 degrees of latitude would become locally extinct closest to the equator. The shifts will be caused by the species' reactions to warming waters, changing ocean chemistry, and ecosystem structure near the tropics, as well as new habitats opening up nearer the poles, researchers say.
01 Oct 2014:
Scientists Photograph Gathering
Of 35,000 Walruses on Alaskan Beach
In one of the largest gatherings of walruses documented in recent years, Alaska biologists photographed a
congress of roughly 35,000 animals resting on a beach
in northwestern Alaska. They swam to shore to rest, a walrus researcher explained, after the last remaining traces of sea ice melted in mid-September. Walruses typically rely on sea ice to provide a platform for resting and caring for their young as they swim to find clams, worms, and shrimp offshore, near the edge of the continental shelf. When no sea ice is available, as has been the case in the Chukchi Sea six of the last eight years, the walruses must make their way to shore. Besides taking them farther from their feeding grounds, the beach gatherings are dangerous for young walruses because they can be trampled, biologists say. The U.S. Fish and Wildlife Service is considering granting Endangered Species Act protections to Pacific walruses.
E360 Video: Indonesian Villagers
Use Drones to Protect Their Forest
The villagers of Setulang in Indonesian Borneo have enlisted a new ally in their fight against the illegal clearing of their forests for oil palm plantations: aerial drones. The indigenous Dayaks manage the surrounding forest conservation area, and they are hoping the drones can help them ward off illegal oil palm operations and protect their land. “Dayaks and Drones
,” a video produced by Handcrafted Films, chronicles how the villagers teamed up with an Indonesian nonprofit to learn how to program and operate drones. Equipped with GPS technology, the small drones photograph the forest and monitor the area for illegal activities.
Watch the video.
30 Sep 2014:
Half of the Planet's
Animals Lost Since 1970, Report Says
The number of animals on the planet has fallen 52 percent in the last 40 years, according to an analysis
Animal population trend since 1970
the conservation organization World Wildlife Fund (WWF). The group's Living Planet Index, which tracked the populations of more than 10,000 vertebrate species from 1970 to 2010, revealed major declines in key populations of mammals, birds, reptiles, amphibians, and fish. The situation is most dire in developing countries, the report said, where wildlife populations have fallen on average by 58 percent. Latin America saw the biggest declines, with more than 80 percent of the region's animals lost since 1970. Globally, freshwater populations have plummeted 76 percent. This year's numbers are worse than those calculated in the last report in 2012, which found declines of 30 percent since 1970. The organization attributed this to new statistical weighting, which it said better represents each region's biodiversity, though other researchers have been critical
of the new methodology. Habitat loss and degradation was cited as the primary cause of biodiversity loss.