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USGS | 2022
The Nation’s coastlines are highly dynamic ecosystems that can change drastically in response to storms, high water levels, and sea-level rise. These changes can put habitats, lives, and…
USGS | 2022
Aspen (Populus tremuloides) forests are keystone ecosystems in the western United States that supply economic and social benefits, including drawing tourists, serving as potential fire breaks,…
USGS | 2022
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…
USGS | 2022
The substantial distributional expansion and infill of pinyon (Pinus monophylla) and juniper (Juniperus sp.) trees (hereafter, "conifer") into sagebrush (Artemisia spp.) ecosystems since…
USGS | 2022
Understanding species status and forecasting range shifts for plants and animals requires accurate species distribution information, particularly at the margins of species ranges. However, most…
USGS | 2022
In recent decades, forests worldwide have experienced dramatic and often unexpected drought-related tree mortality events. California recently suffered its most extreme drought on record, resulting…
USGS | 2022
Shrublands in southern California have seen sweeping changes in vegetation composition and structure due to fire and drought. Invasion of non-native grasses after repeated fire or drought events can…
USGS | 2022
Bird Conservation Regions (BCRs) are ecologically distinct areas with similar bird populations, ecological characteristics, and natural resource management concerns. Understanding vegetation…
USGS | 2022
Fusing remote sensing products from different satellite sensors allows the development of enhanced maps of the distribution of coastal wetland plants and more accurate models of coastal elevations.…
USGS | 2022
Mercury is a neurotoxin and environmental pollutant that endangers the health of humans and wildlife. When mercury flows into aquatic environments like San Francisco Bay (SFB), it can be converted by…
USGS | 2022
The conversion of natural land cover to built-up surfaces has been widely documented as the main determinant of warming across urban areas, since buildings, roads, and other infrastructure absorb and…
USGS | 2022
Fire perimeter databases provide critical geospatial information that land managers use for a variety of purposes, including documenting fire occurrence, determining historical reference conditions…