129 Million Dead Trees in California

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,Welcome to our Story Map about California Tree Mortality.,Since 2010 over 127 million trees have died due to drought and bark beetles. The hardest hit region is the Southern and Central Sierra including the counties of Amador, Calaveras, El Dorado, Fresno, Kern, Madera, Mariposa, Placer, Tulare, and Tuolumne where 96.4 million dead trees are located.,,This Story Map will take you through the history of the tree mortality epidemic and present solutions for affected landowners.,Publish Date: Version I; February 2018,

Tree mortality in Sequoia National Park from 2004 to 2007 and during severe drought in 2014 to 2017

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These data describe tree mortality and the factors associated with tree mortality for a variety of plots in Sequoia National Park. Most of the data were collected between 2014 and 2017 (during an extremely severe drought), along with some comparison data from 2004 to 2007.

Tree mortality in Sequoia National Park from 2004 to 2007 and during severe drought in 2014 to 2017

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These data describe tree mortality and the factors associated with tree mortality for a variety of plots in Sequoia National Park. Most of the data were collected between 2014 and 2017 (during an extremely severe drought), along with some comparison data from 2004 to 2007.

California Tree Mortality Viewer

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Five long years of drought, combined with the increased infestation of native bark beetles as a result of the drought, have contributed to the death of millions of trees on federal, state, and private lands across California. As a result, California is now facing the worst epidemic of tree mortality in modern history. This viewer is brought to you by a subgroup of the Tree Mortality Task Force (TMTF). The TMTF is comprised of multiple agencies, entities and stakeholders working together to address the Tree Mortality crisis. The viewer includes various layers related to the tree mortality problem, including ADS data (depicting areas of dead trees), High Hazard Zones, tree removal projects, and more.

Tree Mortality from Fires and Bark Beetles at 1-km Resolution, Western USA, 2003-2012

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This dataset provides annual estimates of tree mortality due to fires and bark beetles from 2003 to 2012 on forestland in the continental western United States. Tree mortality was estimated at 1-km spatial resolution by combining tree aboveground carbon (AGC) and disturbance datasets derived largely from remote sensing. Tree mortality is expressed as the amount of AGC stored in trees killed by disturbance (Mg carbon per km2). The dataset also includes annual uncertainty maps that were generated using a Monte Carlo approach in which tree biomass, biomass carbon content, and disturbance severity were iteratively varied by their uncertainty.

Mortality factors for dead trees from a subset of plots from the Sierra Nevada Forest Dynamics Plot Network from 1998 to 2010

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This dataset was used to summarize and analyze the mortality factors recorderd on dead trees in the Sierra Nevada Forest Dynamics Plot Network, which is managed by the Sequoia and Kings Canyon Field station of the U.S. Geological Survey's Western Ecological Research Center. Each row of the dataset represents an individual dead tree. These are dead trees that were recorded in the network from 1998 to 2010 for the subset of plots as described in the associated manuscript.

Mortality factors for dead trees from a subset of plots from the Sierra Nevada Forest Dynamics Plot Network from 1998 to 2010

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This dataset was used to summarize and analyze the mortality factors recorderd on dead trees in the Sierra Nevada Forest Dynamics Plot Network, which is managed by the Sequoia and Kings Canyon Field station of the U.S. Geological Survey's Western Ecological Research Center. Each row of the dataset represents an individual dead tree. These are dead trees that were recorded in the network from 1998 to 2010 for the subset of plots as described in the associated manuscript.

Sequoia and Yosemite national parks mortality and fire data (1990-2019) for competition-fire-drought interaction analysis

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This dataset records mortality-- including involvement of bark beetles-- and burn severity information for trees in long term forest dynamics plots in Sequoia National Park and Yosemite National Park that experienced fire.

Sequoia and Yosemite national parks mortality and fire data (1990-2019) for competition-fire-drought interaction analysis

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This dataset records mortality-- including involvement of bark beetles-- and burn severity information for trees in long term forest dynamics plots in Sequoia National Park and Yosemite National Park that experienced fire.

Estimated tree mortality, basal area, climate, and drought conditions for ponderosa pine in forest inventory plots across the western U.S.

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These data consist of environmental covariates and estimated plot-level mortality of ponderosa pine trees. Environmental covariates include growing season temperature and soil moisture, and values are summarized into long-term mean conditions, and anomalies observed between forest inventory sampling events for each plot. Data also include plot locations (with uncertainty introduced by the US Forest Service to maintain private property rights), plot basal area, and several variables related to estimated mortality rate of ponderosa pine trees under various assumptions about basal area conditions.