The region is among half a dozen areas that could experience heavier traffic compared with the average species-movement across the Western Hemisphere in response to a warming climate. The estimate in southeastern states, for example, is up to 2.5 times the average amount of movement across North and South America.
Dark purple marks areas where high densities of animals will need to travel but where they will encounter the most cities, agricultural development and other human-caused barriers. Light yellow marks areas with less human-land uses and where animals should consequently have an easier time moving.
Credit: U of Washington
Other areas that could see pronounced animal movements are northeastern North America, including around the Great Lakes and north into Canada; southeastern Brazil, home to both the species-rich Atlantic Forest and major cities such as Sao Paulo with its 11 million residents; and the Amazon Basin.
The basin, stretching across seven South American countries, could have the greatest animal movements, up to 17 times the average across the hemisphere. The high northern latitudes also show pronounced species movements, not because of animals currently found there but because of an expected influx of species.
While previous studies mapped where animals need to move to find climates that suit them, this is the first broad-scale study to also consider how animals might travel when confronted with cities, large agricultural areas and other human related barriers, according to Joshua Lawler, associate professor of environmental and forestry sciences and lead author of a paper appearing June 19 online in Ecology Letters.
The golden mouse, ornate chorus frog and southern cricket frog – three of the species that will likely be on the move in southeastern U.S. – were among the nearly 3,000 mammals, birds and amphibians the scientists included in their study, nearly half of all such animals in the Western Hemisphere.
"We took into account that many animals aren't just going to be able to head directly to areas with climates that suit them," Lawler said. "Some animals, particularly small mammals and amphibians, are going to have to avoid highways, agricultural development and the like. We also took into consideration major natural barriers such as the Great Lakes in North America and the Amazon River in South America."
Except for one or two very localized studies, this is the first to project species movements based on both climate change and the constraints of human alterations to the landscape. For the climate component, the researchers took 10 projections of future climate, projected species movements for all 10, then averaged the results. For the human impacts component, the scientists added cities, agriculture and other landscape barriers to 30-mile-square (50-kilometer-square) cells across the Western Hemisphere.
They applied a technique developed by paper co-author Brad McRae of the Nature Conservancy that's based on how electricity finds the path of least resistance when traveling across circuit boards. In this case, however, the "current" was the various species trying to stream through each cell, and the resistance was the human-made and natural landscape barriers.
The work was supported by the U.S. Environmental Protection Agency and the Wilburforce Foundation. The other co-authors are Aaron Ruesch, who earned his master's from the UW and is now with the Wisconsin Department of Natural Resources, and Julian Olden, a UW associate professor of aquatic and fishery sciences."The mountainous region from Yellowstone to the Yukon is widely recognized as an important wildlife movement corridor, now our study maps additional pathways across the Western Hemisphere with the potential to shepherd species to safety in a warming future," Olden said. "Climate change and human land use can interact in complex and region-specific ways to shape the ability of species to persist into the future. This suggests that urban and agriculture lands represent both a conservation challenge and opportunity to help species respond to climate-induced changes in temperature."
Sandra Hines | EurekAlert!
Joint research project on wastewater for reuse examines pond system in Namibia
19.12.2016 | Technische Universität Darmstadt
Scientists produce a new roadmap for guiding development & conservation in the Amazon
09.12.2016 | Wildlife Conservation Society
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...
Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.
Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
16.01.2017 | Power and Electrical Engineering
16.01.2017 | Information Technology
16.01.2017 | Power and Electrical Engineering