Alexandra Murphy http://knau.org en Earth Notes: The Slide Fire’s Mosaic of Impacts http://knau.org/post/earth-notes-slide-fire-s-mosaic-impacts <p>In late May of this year, wildfire swept through upper Oak Creek Canyon in northern Arizona. By the time firefighters contained it in early June, the Slide Fire had burned some 22,000 acres of chaparral, mixed conifers, and ponderosa pine forest.</p><p> Wed, 02 Jul 2014 23:07:50 +0000 Alexandra Murphy 49666 at http://knau.org Earth Notes: The Slide Fire’s Mosaic of Impacts Earth Notes: Measuring the Night on the Colorado Plateau http://knau.org/post/earth-notes-measuring-night-colorado-plateau <p>Some 27 national parks and monuments protect the Colorado Plateau’s remarkable canyons, rivers, and wide-open spaces. But, people increasingly visit the plateau to experience another rare natural resource: its dark skies.</p><p> Wed, 12 Mar 2014 15:49:37 +0000 Alexandra Murphy 44504 at http://knau.org Earth Notes: Measuring the Night on the Colorado Plateau Earth Notes: Tracking Climate Change In Northern Arizona http://knau.org/post/earth-notes-tracking-climate-change-northern-arizona <p>In late September, the Intergovernmental Panel on Climate Change released its Summary for Policymakers for part-one of its&nbsp; massive Fifth Assessment Report. Its message? Earth's climate is warming, and human influence on that warming is clear.</p><p> Thu, 21 Nov 2013 19:06:43 +0000 Alexandra Murphy 40037 at http://knau.org Earth Notes: Tracking Climate Change In Northern Arizona Earth Notes: Caddisflies Inspire Medical Innovation http://knau.org/post/earth-notes-caddisflies-inspire-medical-innovation <p>Imagine an adhesive that could take the place of pins and plates when fixing broken bones, or that could replace staples and sutures during surgery. But creating a glue that sticks to a wet surface is no easy task. That's why University of Utah researchers are taking their cues from a proven master of the art - the diminutive caddisfly.</p><p> Wed, 15 May 2013 16:20:42 +0000 Alexandra Murphy 31394 at http://knau.org Earth Notes: Caddisflies Inspire Medical Innovation Earth Notes: Glen Canyon Dam - What Flows In (And Not Out) http://knau.org/post/earth-notes-glen-canyon-dam-what-flows-and-not-out <p>Two hundred miles upstream from Glen Canyon Dam, the Colorado River roars through Cataract Canyon in a rust colored tumult, thick with silt and clay. Each year, the Colorado and its tributaries carry, on average, some 61 million cubic yards of sediment into Lake Powell, enough to fill more than 200,000 railroad boxcars.</p><p> Wed, 08 May 2013 14:52:55 +0000 Alexandra Murphy 31046 at http://knau.org Earth Notes: Glen Canyon Dam - What Flows In (And Not Out) Earth Notes: Restoring a Watershed, One Russian Olive at a Time http://knau.org/post/earth-notes-restoring-watershed-one-russian-olive-time <p>Those who have bloodied hands or arms on the inch-long thorns of a Russian olive, or dulled a chainsaw on its dense wood, know that it takes determination and brute force to clear away these tough nonnative trees. Since 2000, this formidable task has been underway along the Escalante River in southern Utah.</p><p>Introduced in the 1940s to combat soil erosion, Russian olives took to the Colorado Plateau with gusto. They have crowded out native willows and cottonwoods, forming virtually impenetrable thickets along hundreds of miles of washes and river bottoms.</p> Wed, 18 Apr 2012 11:00:00 +0000 Alexandra Murphy 12430 at http://knau.org Earth Notes: Restoring a Watershed, One Russian Olive at a Time Earth Notes: Bumblebees on the Colorado Plateau and Beyond http://knau.org/post/earth-notes-bumblebees-colorado-plateau-and-beyond <p>With bee populations declining worldwide, news is often grim in the world of bee research. But last August, entomologists from the University of California at Riverside found something to cheer about: they spotted three members of a bumblebee species long feared extinct.</p><p>Last documented in 1956, the Cockerell&rsquo;s bumblebee of south-central New Mexico is the country&rsquo;s rarest bumblebee.</p> Wed, 14 Mar 2012 11:00:00 +0000 Alexandra Murphy 10657 at http://knau.org Earth Notes: Bumblebees on the Colorado Plateau and Beyond Earth Notes: Exploring Fish Ecology in the Colorado River Drainage http://knau.org/post/earth-notes-exploring-fish-ecology-colorado-river-drainage <p>Over the past hundred years, people have introduced dozens of non-native fish species into the Colorado River&nbsp;and its tributaries. During that time, populations of native fish species have dropped, in some cases dramatically. It&rsquo;s easy to guess at the causes of native species decline, like predation and competition for food. But it&rsquo;s far more difficult to prove.</p> Wed, 01 Feb 2012 07:00:00 +0000 Alexandra Murphy 8237 at http://knau.org Earth Notes: Exploring Fish Ecology in the Colorado River Drainage