Aspen Manning

Texas State University | TxSt · Department of Geography

Stream channels in the American Southwest are misunderstood because they have been understudied and overgeneralized. This misunderstanding has serious consequences for environmental policy, particularly in defining the scope of jurisdiction under the Clean Water Act. While the current status of regulations defining the scope of jurisdictional water...

This study documents the results of distributional surveys conducted in 2014 and 2018 for the rare Physostegia correllii at Lady Bird Lake in Travis Co., Texas. Survey results showed that some P. correllii colonies were lost in between surveys but additional colonies were observed at new locations along deposited silt and sediment banks. Survey res...

Protected lands provide a wide range of ecosystem services and other benefits to multiple stakeholders across all scales, from local to global. This paper uses Gila National Forest (New Mexico, USA) as a case study to show the value of these ecosystem services and the damage costs associated with removing its protection from development. Total valu...

The Blanco River, which flows through the limestone Balcones Canyonlands of central Texas (USA), experienced catastrophic flooding in May 2015 that resulted in significant biogeomorphic disturbance to its riparian corridor. High-resolution aerial and satellite imagery from pre- and post-flooding for a 55-km reach of river were used to map and categ...