We hope you will enjoy learning about the variety of ecosystems and species we are studying throughout the United States. We are part of the Northwest Region of the USGS and our scientists work on diverse issues such as climate change, endangered species, wildlife health, invasive species, and much more. Click on Science to begin exploring the places we go and the species and landscapes we study.
NOROCK's Greg Pederson will present information on a new data set of publicly available and investigator-contributed tree ring-width and maximum latewood density records.NOROCK EcoLunch!
USGS Emeritus Scientist Bob Gresswell has received the Starker Leopold Award which was presented at the 13th Biennial Scientific Conference of the Greater Yellowstone Ecosystem in Jackson, Wyoming.Read More
A new study by the USGS Northern Rocky Mountain Science Center and the NPS Greater Yellowstone Network has shown that contamination of wetlands by brine had negative effects on plant productivity and macroinvertebrate communities.
Grizzly bears in the southern portion of the Northern Continental Divide Ecosystem experienced a rapid increase in genetic diversity, according to a new study led by the USGS.
American pikas – small herbivores that typically live in rocky slopes, known as talus, across many mountain ranges in the American West – are disappearing from some locations across the West due to climate change, according to a study by the U.S. Geological Survey and some of its partners.
Ecological abundance data are often recorded on an ordinal scale in which the lowest category represents species absence. One common example is when plant species cover is visually assessedwithin bounded quadrats and then assigned to pre-defined cover class categories.We present an ordinal beta hurdle model that directly models ordinal category probabilitieswith a biologically realistic beta-...Read More
Although biotic responses to contemporary climate change are spatially pervasive and often reflect synergies between climate and other ecological disturbances, the relative importance of climatic factors versus habitat extent for species persistence remains poorly understood. To address this shortcoming, we performed surveys for American pikas (Ochotona princeps) at > 910 locations in 3...Read More
Ecological theory suggests that pathogens are capable of regulating or limiting host population dynamics, and this relationship has been empirically established in several settings. However, although studies of childhood diseases were integral to the development of disease ecology, few studies show population limitation by a disease affecting juveniles. Here, we present empirical evidence that...Read More