SDE Feature Class
Tags
Tree species, dbh, Sierra Nevada, climate change, elevation, plants, conifer, hardwood, forest, Northern California, Sierra Nevada ecoregion
This project is designed to monitor wildlife, plants, and habitats in targeted California ecoregions here, the northern Sierra Nevada. The overall goal is to describe baseline conditions and monitor trends in habitat conditions and species populations over the long term. In particular, we are interested in trends over time, elevation and habitat, climate change effects, landscape measures (condition, patch size, surrounding disturbance), species interactions, and weather effects. The tree and shrub monitoring was specifically designed to allow comparisons with the US Forest Service Vegetation Type Map (VTM) data from the 1930s ( http://vtm.berkeley.edu/ ).
Data on trees from the Sierra Monitoring Project (SMP)/Ecoregional Biodiversity Monitoring (EBM) project (project). Collected within 0.2-acre (0.081 ha) plots in the northern Sierra Nevada ecoregion, numbers of stems in size categories, by species. Randomly located plots above 3000 feet elevation were selected, one per USDA Forest Service Forest Inventory and Analysis (FIA) hexagon, stratified in 6 elevation zones: 3-4k, 4-5k, 5-6k, 6-7k, 7-8k, and 8,000+ feet, and constrained to fall more than 100m from roads. In the publicly-accessible data, location data will be restricted to FIA hexagon centers: actual plot locations are within 2.7 km of these points; and elevation, slope, aspect and other environmental data are accurate to the true location. Collected during growing seasons 2009-2018 by California Department of Fish and Wildlife (originally Fish and Game), North Central Region, Resource Assessment Program; funded by a State Wildlife Grant from the US Fish and Wildlife Service; initiated by Armand Gonzales, directed by David Wright, Canh Nguyen, Stacy Anderson. Counties included are: Plumas, Butte, Yuba, Sierra, Nevada, Placer, El Dorado, Amador, Calaveras, and Alpine. Because of access constraints, plots fall primarily on public lands several random points selected that fell on private lands had to be rejected due to denial of access. Plots that were excessively steep (>35 degree slope), too close to development, with unsafe access, or requiring more than 5 hours hiking time were rejected for safety or practical reasons. When plots were rejected, another random selection was made in the same hexagon from the same elevation stratum, if possible. Tree species stems smaller than 4 inches diameter-at-breast-height are contained in a separate dataset (SMP/EBM shrub data).
North Central Region, Resource Assessment Program; funded by a State Wildlife Grant from the US Fish and Wildlife Service; initiated by Armand Gonzales, directed by David Wright, Canh Nguyen, Stacy Anderson. Conversion into ArcGIS format completed by Chris Curlis.
License: This work is licensed under Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). Using the citation standards recommended for BIOS datasets ( https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS ) satisfies the attribution requirements of this license.
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
Extent
| West | -121.712553 | East | -119.485225 |
| North | 40.353419 | South | 38.155803 |
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:5,000,000 |
License: This work is licensed under Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). Using the citation standards recommended for BIOS datasets ( https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS ) satisfies the attribution requirements of this license.
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.