For the better part of July I was contracted by the Forest Service Region 5, in a partnership with the CNPS Vegetation Program, to follow up with our 2013 work mapping and monitoring whitebark pine in the north state. I visited numerous sites where I predicted Pinus albicaulis might occur to conduct surveys and improve our state-wide range map for the species. Overall, the health of the species in northern California is in slow decline due to a variety of factors including mountain pine beetle, white pine blister rust, global climate change, and recent high intensity fires. In an earlier post, I shared some highlights from the Modoc National Forest, this post shares images and highlights from Klamath National Forest whitebark pine work.
The Warner Mountains are a north-south trending fault block range in the northeastern corner of California, extending northward into Oregon. The length of the range is approximately 90 miles, with the northern California portion bounded by Goose Lake on the west and Surprise Valley on the east. In California, elevations range between 5,000-9,897 feet (on Eagle Peak). In the High Grade district, which is the extreme northern limits of the Warners in California, the range has a fairly even crest of 7500 feet, reaching an elevation of 8290 feet on Mount Bidwell. This is the area where I spent four days mapping and monitoring whitebark pine (Pinus albicaulis) for the US Forest Service.
The geology of the region is complex and compelled me to understand it better. Bedrock consists of sedimentary rocks of the Oligocene overlain by rhyolitic to basaltic volcanic rocks of the Miocene. The basal andesite is overlain by rhyolite and glassy rhyolite, which are in turn overlain by basalt flows. There are valuable minerals and gems found in this area that have justified a long-standing history of mining. Gold was the first and major extracted mineral soon followed by opals, petrified wood, and even obsidian. The range is a complex assemblage of interesting rocks for sure which help sculpt the regional ecology.
When choosing destinations for exploration, isolation has always been an important element in the algorithm. At this point in my Western explorations I’ve been to most mountain ranges in search of solitude and biological uniqueness. So, when the opportunity arose for a fall trip with some college friends, I keyed in on a mountain range I’d never visited mid-way between Arcata, California and Livingston, Montana—deep within Nevada’s High Rock-Black Rock desert.
Ecological amplitude is the range of habitats, often dependent on and defined by elevation, within which a certain species has the ability to survive. In the Klamath Mountains there are two species of pines that define the highest elevations–growing at or near the summits of peaks from ~7500′ to 9000′ (The Klamath Mountains get no higher). Foxtail pine (Pinus balfouriana) and whitebark pine (Pinus albicaulis) inhabit our sky islands where they are the crowning jewels of this coniferous wonderland.