Filters: Tags: tree mortality (X) > Date Range: {"choice":"year"} (X)
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Southwestern Colorado is already experiencing the effects of climate change in the form of larger and more severe wildfires, prolonged severe droughts, tree mortality from insect outbreaks, and earlier snowmelt. Climate scientists expect the region to experience more frequent summer heat waves, longer-lasting and more frequent droughts, and decreased river flow in the future (Lukas et al. 2014). These changes will ultimately impact local communities and challenge natural resource managers in allocating water and range for livestock grazing under unpredictable drought conditions, managing forests in the face of changing fire regimes, and managing threatened species under shifting ecological conditions. Considering...
Categories: Publication;
Types: Citation,
Report;
Tags: Data Visualization & Tools,
North Central CASC,
Science Tools For Managers,
Social Science,
climate change,
Most of these data were collected in order to create a database of tree locations for use in calibrating remote sensing tools and products, particularly dead tree detection tools and canopy species maps. Data include tree locations, species identification, and status (live, dead, and, if dead, sometimes includes information on foliage and twig retention). They are a collection of different sampling efforts performed over several years, starting in a period of severe drought mortality. One csv table is included that shows data and validation results for an additional dataset that was used to test the NAIP derived dead tree detection model that is associated with this data release. Locations are not included for that...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: California,
Forestry,
Kings Canyon National Park,
Sequoia National Park,
Sierra Nevada,
Tree loss is increasing rapidly due to drought- and heat-related mortality and intensifying fire activity. Consequently, the fate of many forests depends on the ability of juvenile trees to withstand heightened climate and disturbance anomalies. Extreme climatic events, such as droughts and heatwaves, are increasing in frequency and severity, and trees in mountainous regions must contend with these landscape-level climate episodes. Recent research focuses on how mortality of individual tree species may be driven by drought and heatwaves, but how juvenile mortality under these conditions would vary among species spanning an elevational gradient—given concurrent variation in climate, ecohydrology, and physiology–remains...
Categories: Publication;
Types: Citation;
Tags: Climate Change,
Drought,
Establishment,
Forest Regeneration,
Heatwave,
These snag (dead tree) fall data were collected as part of long term forest dynamics data. Tree fall data were collected non-systematically as text comments until 2013, after which explicit snag fall data were collected on an annual basis. This particular dataset includes data from 23 plots in old-growth mixed conifer and montane conifer forests in Sequoia-Kings Canyon and Yosemite National Parks. The plots range in size from 0.9 ha to 2.5 ha and were established from 1982 to 2001. We used demography plot data through 2021 (collected before the extensive KNP Complex wildfire burned many of the plots). Before 2021, four of the 23 plots had experienced relatively recent prescribed burns or wildfires. When established,...
Categories: Data;
Tags: California,
Forestry,
Sequoia National Park,
Sierra Nevada,
USGS Science Data Catalog (SDC),
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