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Thousand cankers is a recently described disease and its involvement in tree mortality apparently is also recent. The first published note involving black walnut die-offs that likely can be attributed to TCD occurred in the Espanola Valley of northern New Mexico in 2001.
Such drought leaves trees stressed for water, which makes them susceptible to beetle infestation and exacerbates tree mortality further. [36] Drought intensity lessened in California by 2017, [37] but the effects of tree mortality linger for years.
California's wildfire season was milder in 2004 than in the previous year. ... leading to 75–100 percent tree mortality and soil erosion. In December following the ...
In California, these factors were responsible for 35%, and 18%, respectively, of utility-related fires larger than 10 acres. [1] Strong winds have been known to exacerbate these problems. [1] Live wires can ignite dry vegetation and fuels, and fallen trees can result in downed lines. [13]
Phytophthora ramorum is the oomycete known to cause the disease sudden oak death (SOD).The disease kills oak and other species of trees and has had devastating effects on the oak populations in California and Oregon, as well as being present in Europe.
The Northern California Geographic Coordination Center (commonly called 'North Ops') forecast stated that "Confidence is moderate to high for an early start to the significant large fire season." [12] In Northern California, peak fire season begins in the early summer (June–July) and runs until late fall, varying year to year.
Single Tree Selection involves removal of individual trees in a prescribed fashion. Usually this is done across the size distribution of trees in a stand and mimics to some degree the natural mortality pattern and rate within a stand. Low-impact logging meets current needs without compromising the ability of future generations to meet their needs.
The 2020 Creek Fire was a very large wildfire in central California's Sierra National Forest, in Fresno and Madera counties. One of the most significant fires of California's record-setting 2020 wildfire season, it began on September 4, 2020, and burned 379,895 acres (153,738 ha) over several months until it was declared 100% contained on December 24, 2020.