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NPS | 2021
The Yukon River basin encompasses 832,000 square-kilometers and is one of Earth's largest boreal-Arctic rivers. Characterized by a long, frozen winter season, the river demonstrates an abrupt…
NPS | 2021
Twenty years ago, ecological studies were often limited by the number of times biologists could find (relocate) their study animals. With the advent and now widespread use of Global Positioning…
NPS | 2021
The snow season has become shorter and the growing season longer over the past 20 years in Alaska's Arctic National Parks. The NPS Arctic Inventory and Monitoring Network (ARCN) uses MODIS (Moderate…
USGS | 2021
The 2020 fire season in western North American was among the most extreme on record. Over 100 fires were active in September, with the majority occurring in California, Oregon, and Washington, where…
USGS | 2021
Tidal marsh wetlands worldwide have been lost due to human impacts. Tidal marshes are critical to many wildlife taxa and have become the focus of many restoration projects. In the Suisun Marsh of…
USGS | 2021
During late summer and autumn, Pacific walruses are resting on shore north of the Bering Strait more often and in larger numbers in both the United States and Russia. Historically, walruses…
USGS | 2021
Many wildlife species reside in sensitive habitats that make detection and monitoring difficult. For waterfowl, measuring brood production can serve as an early indicator of habitat quality and…
USGS | 2021
As part of a broader trial of noninvasive methods to research wild wolves (Canis lupus) in the Superior National Forest (SNF), Minnesota, the USGS Wolf and Deer Project (Northern Prairie Wildlife…
USGS | 2021
Mule deer are known to avoid human disturbances, including energy infrastructure and development. By combining remote sensing data, GIS modeling, and information on energy expenditure of mule deer,…
USGS | 2021
Disturbances to animals can cause changes in behavior. Therefore, it is critical for wildlife managers to understand what disturbances may impact animals and how animals adapt to them. USGS…
USGS | 2021
Waterfowl rely on continent-wide wetland networks supporting migratory pathways that connect important breeding and wintering grounds. Globally, 30 to 90% of these networks are threatened or have…
USGS | 2021
Waterfowl populations within California's Central Valley are unusual among most North American waterfowl populations in that the region contains both resident and migratory populations of several…