A rugged, whitewater river flowing northward through deep canyons, the New River is among the oldest rivers on the continent. New River Gorge National River in West Virginia encompasses over 70,000 acres of land along the New River, is rich in cultural and natural history, and offers an abundance of scenic and recreational opportunities.
Big Southern Butte is one of two domes rising from a sea of basalt near the center of the eastern Snake River Plain in Idaho. The butte is one of the largest volcanic domes in the world, but at 300,000 years old it is also one of the youngest. Hikers who trek to the 7,550-foot high summit are rewarded with spectacular panoramic views. Photo by Devin Englestead, BLM Upper Snake Wildlife Biologist.
First light at Bosque del Apache National Wildlife Refuge in New Mexico. Established in November 22, 1939, the refuge has provided a critical stopover and wintering spot for thousands of sandhill cranes, geese and other waterfowl for 75 years. Bosque del Apache's sandhill crane population has multiplied from 18 birds in the 1840s to more than 20,000 birds today. Photo by Kim Hang Dessoliers (www.sharetheexperience.org).
DOINews: New Research Suggests that Urbanization & Higher Temperatures Influence Butterfly Emergence Patterns
A team of researchers focused on 20 common butterfly species in Ohio to examine the effect of temperature and urban density on butterfly emergence patterns. Results revealed a wide range of responses to urbanization across species, but one finding stood out.
“The combined effect of an urban area and a warmer part of the state appeared to delay emergence in seven of the 20 species,” Wepprich says.
The affected species in these areas emerged days or weeks after other butterflies of the same species emerged in either rural areas in the warmer parts of Ohio, or urban areas in colder parts of Ohio.
“Even though butterflies often change their emergence predictably to small increases in temperature, these species responded in unexpected ways to larger increases in temperature,” Wepprich says.
“Scientists often use analogies for global climate change, such as urban warming, to understand how species' might respond to a warmer future,” Wepprich adds. “This allows us to estimate which species are more vulnerable to climate change.
“We don't really know precisely where the tipping point is, or why only some species respond this way, but something is happening here. We're still working to better understand what's going on with these butterfly species and what consequences there may be for their populations.”