Recent long-term studies revealed a three-quarters reduction of insects in parts of Germany and an 80 percent decline of pollinating flies at a field site in Greenland. What’s going on with numbers of Alaska insects? Two scientists recently completed a study on the abundance and variety of insects in the spruce forests of Alaska. If […]
A new machine-learning system developed at the University of Alaska Fairbanks can automatically produce detailed maps from satellite data to show locations of likely beetle-killed spruce trees in Alaska, even in forests of low and moderate infestation where identification is otherwise difficult. The automated process can help forestry and wildfire managers in their decisions. That’s […]
While wandering middle Alaska this summer, I noticed orange spruce trees along the entire length of the Denali Highway, from Paxson to Cantwell. In what looked like a dendrological case of frostbite, tips of every branch were afflicted with something. The real show happened when the wind blew: An entire valley glowed apricot. After […]
Image: Dead trees near a shoreline of Russell Fjord about 15 miles from the town of Yakutat. Ned Rozell photo. RUSSELL FJORD — Standing on this smooth gravel shoreline, 15 miles northeast of the town of Yakutat, you can tell something big happened. A forest of dead trees encircles the shoreline. The dry, bone-white stems […]