Tree Mortality - Past 5 Years

The dead tree canopy cover fraction change from the Mortality Magnitude Index (MMI) for eDaRT events. This metric is provided to complement data (in terms of spatial resolution and canopy cover loss estimates) available from the Region 5 Insect and Disease Survey that performs aerial detection monitoring in support of tracking tree mortality that includes affected hosts and agents (available at: ).

Data and Resources

Additional Info

Field Value
Last Updated January 17, 2025, 06:42 (UTC)
Created January 17, 2025, 06:42 (UTC)
category /Forest and Shrubland Resilience/Disturbance
collection_name California Landscape Metrics
creation_method Insect- and disease-caused tree mortality was compiled at the 30 m scale from the Ecosystem Disturbance and Recovery Tracker (eDaRT; Koltunov et al. 2020), described in the [Introduction](https://docs.google.com/document/d/15tXCMkEzUEgQKHoXL74cftwtLuz3z-Rm/edit#heading=h.2s8eyo1). This metric represents the 2021 status of cumulative tree mortality occurring over the years 2017 to 2021. An additional version represents the mortality of the last 1 year (2021). Note that tree mortality which, since its occurrence, was affected by fire or land management activities has been removed. This data layer currently exists only for the Sierra Nevada region. Efforts are underway to explore development of these data for the rest of California.
data_units Percent of 30m pixel (absolute, not relative, value)
data_vintage 2021
encoding utf8
file_name SNV_CumulTreeMort_20172021_202209_T2_v5
format GeoTiff
harvest_object_id fc7f91c3-2824-47e9-979c-ec393aec2c9d
harvest_source_id a2637971-af12-457f-ae4a-831d2202a539
harvest_source_title WIFIRE Commons
metric_definition_and_relevance The dead tree canopy cover fraction change from the Mortality Magnitude Index (MMI) for eDaRT events. This metric is provided to complement data (in terms of spatial resolution and canopy cover loss estimates) available from the Region 5 Insect and Disease Survey that performs aerial detection monitoring in support of tracking tree mortality that includes affected hosts and agents (available at: <https://www.fs.usda.gov/detail/r5/forest-grasslandhealth/?cid=fsbdev3_046696>).
spatial {"type": "Polygon", "coordinates": [[[-122.2883616476824, 35.05769372687348], [-117.5563290826801, 35.05769372687348], [-117.5563290826801, 42.00332292672577], [-122.2883616476824, 42.00332292672577], [-122.2883616476824, 35.05769372687348]]]}
tier 2