Projects by Region

Cherokee Peoples have had a sustained presence in the southern Appalachians over the past 12,000 years, with a peak population of about 250,000 people inhabiting approximately 32 million hectares across Georgia, Alabama, Tennessee, Kentucky, West Virginia, Virginia, and the Carolinas. Early contact with European settlers caused drastic population declines and land loss, due to disease...

Wildfire, drought, and insects are reshaping forests in the Western United States in a manner that is being exacerbated by warming temperatures. Disturbance events such as these can significantly alter the amount of land that is covered by forest in an area or region. Consequently, changes in forest cover from disturbance can impact water runoff conditions leading to dangerous flooding...

The nursery industry grows, markets, and sells plants for ecological restoration as well as urban and suburban landscaping. The Northeast U.S. is a patchwork of small, mostly private land holdings, where the choices of nursery professionals influence the composition of current and future ecosystems. Unfortunately, the nursery industry focuses predominantly on non-native plants. This...

Climate projections for the South-Central U.S. indicate increases of 2-5°F in average high temperatures by mid-century, declines of up to 4% in average precipitation, and increases in heatwaves and large rainfall events. This changing, more unpredictable climate makes it difficult to decide which species to plant when, or to know when certain species will bloom and go to seed. A refuge...

Vegetation transformations after wildfires are a growing issue for forest and shrubland managers in the Inland Pacific Northwest. Severe fires combined with persistent drought and invasive species can slow or prevent the recovery of burned forests and shrublands to their pre-fire states, resulting in ecological, economic, and cultural losses. Forests may be converted to shrub fields or...

Steep, mountainous watersheds, dramatic climate gradients, and tight links between the land and sea are common features of both the Pacific Islands and Southeast Alaska. In these "ridge-to-reef" and “icefield-to-ocean" ecosystems, environmental changes that occur at higher elevations have downstream impacts on the waters below. Today, these two ecosystems are undergoing changes in...

The Colorado River provides water to 40 million people in the southwestern United States. Consistent water level declines in Colorado River Basin reservoirs have focused research attention on the long-term changes in winter precipitation and the timing of snowmelt and runoff. Research on how warming temperatures affect winter precipitation and spring snowmelt is ongoing, however, less...

The Greater Yellowstone Area (GYA) is an iconic landscape with national parks, iconic species like grizzly bears and elk, and over 11,500 square miles of forest. While fires are a natural part of the GYA, climate change and land management legacies are increasing the frequency and size of severe fires. Climate change interacts with these fires to shift conifer forests to non-forested...

High elevation red spruce forests are among the most iconic and visited natural communities in the High Alleghenies of the Central Appalachian Mountains. These ecosystems provide many services such as clean water and carbon sequestration, as well as habitat for species of high conservation concern, i.e., the eastern brook trout, the northern goshawk, and the northern flying squirrel...

Over the last half-century, grassland bird populations have declined far more than any other bird group in North America. This is because native grasslands were largely replaced with croplands, and many remaining prairies are degraded. Land managers and conservation organizations are racing to preserve and restore these ecosystems to stem further loss of grassland birds. Given limited...

Project Overview Climate change threatens keystone plant communities and insects that make up the base of functional food webs, but restoration practitioners struggle to factor climate considerations into restoration projects for a number of practical reasons. Researchers supported by this National CASC project will create a trait-based plant vulnerability assessment to guide restoration

As droughts become more frequent, there is a growing need to understand how drought impacts streamflow permanence. Intermittent streams, or streams that go dry at some point during the year, are found in all ecoregions and represent over half of the global stream network length. As stream intermittence increases, there will be implications for both aquatic and terrestrial wildlife...