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  3. Data supporting Landsat time series assessment of invasive annual grasses following energy development

Data supporting Landsat time series assessment of invasive annual grasses following energy development

Dates

Publication Date
Start Date
1985-01-01
End Date
2018-12-31

Citation

Villarreal, M.L., Soulard, C.E., and Waller, E.K., 2019, Data supporting Landsat time series assessment of invasive annual grasses following energy development: U.S. Geological Survey data release, https://doi.org/10.5066/P9LSUJWH.

Summary

To determine if invasive annual grasses increased around energy developments after the construction phase, we calculated an invasives index using Landsat TM and ETM+ imagery for a 34-year time period (1985-2018) and assessed trends for 1,755 wind turbines (from the U.S. Wind Turbine Database) installed between 1988 and 2013 in the southern California desert. The index uses the maximum normalized difference vegetation index (NDVI) for early season greenness (January-June), and mean NDVI (July-October) for the later dry season. We estimated the relative cover of invasive annuals each year at turbine locations and control sites and tested for changes before and after each turbine was installed. These data were used to make final conclusions [...]

Contacts

Point of Contact :
Miguel Villarreal
Process Contact :
Miguel Villarreal
Originator :
Miguel Villarreal, Christopher E Soulard, Eric K Waller
Metadata Contact :
Miguel Villarreal
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Ecosystems
SDC Data Owner :
Western Geographic Science Center

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Shapefile: Turbine_ESI_Summaries.zip
Turbine_ESI_Summaries.shp.xml
Original FGDC Metadata
View 		20.05 KB
Turbine_ESI_Summaries.cpg 5 Bytes
Turbine_ESI_Summaries.dbf 881.37 KB
Turbine_ESI_Summaries.prj 167 Bytes
Turbine_ESI_Summaries.sbn 15.75 KB
Turbine_ESI_Summaries.sbx 324 Bytes
Turbine_ESI_Summaries.shp 48.09 KB
Turbine_ESI_Summaries.shx 13.81 KB

Purpose

Invasive annual grasses are of concern in much of the western United States because they tolerate resource variability and have high reproductive capacity, and are readily dispersed in disturbed areas like those created and maintained for energy development. Early season invasive (ESI) grasses “green up” earlier than most native plants, producing a distinct pulse of greenness in the early spring that can be exploited to identify their location using multi-date imagery.

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Additional Information

Alternate Titles

  • Early Season Index (ESI) values for turbines and corresponding control site before and after energy development

Identifiers

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DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P9LSUJWH

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