USGS Submissions


Riparian Restoration Evapotranspiration and Drought

Submitted by tadamson on

The Colorado River delta riparian vegetation has been declining since 2000 as measured by Landsat. USGS scientists used the two-band Enhanced Vegetation Index (EVI2) as a proxy for greenness and as an input to calculate actual evapotranspiration (ETa, mmd-1). Restoration initially started in 2010 and has become more widespread and successful in recent years since 2019.

The Effects of Prolonged Drought on Chaparral Vegetation and Burn Severity

Submitted by tadamson on

California recently experienced one of the most severe droughts in its history, resulting in extensive dieback of chaparral vegetation in the State’s Mediterranean regions. Though chaparral species are adapted to annual summer drought, the duration or intensity of a drought may exceed the adaptive capabilities of even these plants.


A Customized Image Classification Framework to Develop Regional-scale, High-resolution Conifer Maps

Submitted by tadamson on

The substantial distributional expansion and infill of pinyon (Pinus monophylla) and juniper (Juniperus sp.) trees (hereafter, "conifer") into sagebrush (Artemisia spp.) ecosystems in Nevada and northeastern California since the late 1800s threatens the ecological function and economic viability of these ecosystems and represents a major contemporary challenge facing land and wildlife managers.

Linking Aquatic Habitat Inundation Variations with Sensitive Species Population Monitoring

Submitted by tadamson on

Human water use that alters river flow can shape ecology and biodiversity in many riverine and associated environments. Population viability is often linked to the timing and extent of floodplain and wetland inundation, and disruptions to historical flow regimes can have major impacts on species that have difficulty adapting to altered environments.