Skip to main content
U.S. flag

An official website of the United States government

12 Days of Conifers: Pinyon, Juniper, and the Greater Sage-Grouse

It’s Day 7 of 12 Days Of Conifers and we’re headed to the eastern slope of the Sierra Nevada and into the sagebrush country at the edge of the Great Basin.

Man stands next to a huge juniper tree
Scientist Nate Stephenson with a large juniper tree in the Sierra Nevada

Today’s conifers are pinyon pine and juniper (primarily Pinus monophylla, Juniperus osteosperma, and Juniperus occidentalis).,

Pinyon pine and juniper are characteristic of the dry eastern slopes of the Sierra Nevada, extending into the Great Basin. Both types of trees have seeds that are commonly eaten by people—pine nuts are harvested from pinyon pines, and juniper berries (which are actually modified cones) are used to flavor gin, among other culinary uses.

Hundreds of years ago, pinyon and juniper were a native part of Great Basin sagebrush ecosystems, but they were not common. As the name would imply, sagebrush country is dominated by, well, sagebrush (Artemisia sp.). But since the 1800s, parts of the sagebrush steppe are looking more and more like conifer country, as pinyon and juniper species encroach into the sagebrush. Changing land use practices, especially livestock grazing, climate, and changes in fire frequency have been identified as causes.

USGS ecologist Pete Coates has spent many years studying the sagebrush ecosystem, with a particular focus on its most famous bird, the greater sage-grouse (Centrocercus urophasianus). The greater sage-grouse depends on sagebrush, which provides the bird with food and cover from predators. In contrast, greater sage-grouse do not care for conifers. Coates’s research has found that greater sage-grouse avoid habitats dominated by pinyon and juniper.

Managing ecosystem boundaries like the edge of the Great Basin can be a real challenge. As climate and land use changes shift the species composition of Western ecosystems, land managers have to make difficult choices about what the land should look like going forward. USGS ecosystems research gives managers a clearer picture of how plants, animals, and people interact.

Read more about USGS sagebrush research.

Check out an open-access study of sage-grouse and conifers.

Return to the 12 Days of Conifers home

Conifer forest at the edge of a sagebrush area, with mountains in the background
Conifer encroachment in the Great Basin


Get Our News

These items are in the RSS feed format (Really Simple Syndication) based on categories such as topics, locations, and more. You can install and RSS reader browser extension, software, or use a third-party service to receive immediate news updates depending on the feed that you have added. If you click the feed links below, they may look strange because they are simply XML code. An RSS reader can easily read this code and push out a notification to you when something new is posted to our site.