- October 30, 2015 at 6:06 pm
Oak leaves this year have been visited by parasitic insects that cause the growth of some very interesting puffballs.
- October 23, 2015 at 9:07 am
McKnight Prairie, just a few miles from Carleton's campus, is a rare example of native remnant prairie.
- October 16, 2015 at 3:52 pm
Why do leaves turn such a variety of colors in the fall?
- October 9, 2015 at 7:41 am
The onset of cold is sending raptors on their annual southward migration. Some species will remain in the Arb throughout winter.
- October 4, 2015 at 10:29 am
Minnesota's bat population is beginning to be threatened by White Nose Syndrome as it spreads from the Northeast.
- September 26, 2015 at 6:27 pm
When the Cannon River flooded in September 2010, significant damage occurred to infrastructure around Northfield. But yearly floods have shaped the Arb for centuries, and are important to riparian ecosystems.
- June 5, 2015 at 5:08 pm
Freshwater mussel populations are in decline, but these unobtrusive creatures are still very important to river ecosystems.
- May 22, 2015 at 10:55 am
A species of beetle that infests and kills Emerald Ash trees is invading Minnesota. There may be no way to stop it, but land managers are on the case of how to slow down its progression.
- May 15, 2015 at 1:45 pm
Spring means it's time for controlled burns of the prairie in the Cowling Arboretum!
- May 1, 2015 at 3:17 pm
Earthworms aren't native to Minnesota, and we're still studying what their impact on prairie landscapes might be.
- April 24, 2015 at 2:03 pm
While the first small blue flowers to appear on Carleton's campus, Siberian Squill, are actually invasives, many ephemeral woodland flowers can be found in the Arboretum if you catch them during their brief blooming window in the spring.
- April 17, 2015 at 1:45 pm
Frogs signal environmental changes before most other species are affected by them because they quickly absorb things in the environment through their porous skin. Since 1995, Minnesota has been the center of research into "mutant" frogs whose physical deformities may be caused by a number of factors.