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.
A new mapping tool from the U.S. Department of Energy
lets users see how geothermal power plants
Geothermal power plants and heat flow potential
across the country are taking advantage of the heat stored within the earth’s crust. Most of the nation’s 154 operational and planned geothermal plants are clustered in western states, where geothermal heat potential is especially high (red areas). Notably, the map identifies two areas that appear ripe for new geothermal development: one in the Great Plains and another at the border of Virginia and West Virginia. The bulk of the facilities are conventional geothermal plants, which generate power using fluid found naturally deep below earth's surface. Steam captured at the surface spins a turbine, which then powers an electric generator. A newer type of technology, called enhanced geothermal, forces cold water from the surface down into the hot crust. Both types are generally considered clean sources of energy.
Interview: A Call for Climate Goals Other Than Two Degrees Celsius
When international delegates meet in Paris next year to negotiate a new climate agreement, they'll be aiming to keep the global average temperature from rising more than 2 degrees
Celsius above pre-industrial levels, the maximum seen by many for avoiding the worst impacts of climate change. But David Victor, a professor of international relations at University of California San Diego, argued in a recent controversial commentary in Nature
that the 2-degree goal is now unattainable and should be replaced by more meaningful goals. In an interview with Yale Environment 360
, Victor explains why he believes the 2-degree threshold has failed to position policy makers to take serious action on climate change and outlines the "basket of indicators" that he and his co-author are suggesting be used instead. Read the interview.
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 the drones with available public health data, researchers there are hoping to better understand how changes in the environment affect the frequency of contact between human populations and disease vectors like mosquitoes and macaques, both of which can harbor the malaria parasite. A major benefit of using drones, the researchers note, is that areas can be mapped frequently at relatively little cost.
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.
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Yale School of Forestry
& Environmental Studies
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Photographer Peter Essick documents the swift changes wrought by global warming in Antarctica, Greenland, and other far-flung places. View the gallery.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video that chronicles the story of a Chinese village’s fight against a polluting chemical plant, was nominated for a 2011 Academy Award for Best Documentary (Short Subject).
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
In a Yale Environment 360
video, photographer Pete McBride documents how increasing water demands have transformed the Colorado River, the lifeblood of the arid Southwest. Watch the video.