Wetland Moist Soil Seed Maps for the Central Valley of California 2007-2017
Dates
Publication Date
2018-12-21
Start Date
2007
End Date
2017
Citation
Byrd, K.B., and Lorenz, A.A., 2018, Wetland Moist Soil Seed Extent and Productivity Maps for the Central Valley of California 2007-2017: U.S. Geological Survey data release, https://doi.org/10.5066/P9PMO9Q2.
Summary
We produced a series of maps of moist soil seed plants within managed wetlands in the Central Valley of California from 2007-2011 & 2013-2017. Moist soil seed plants, such as swamp timothy (Crypsis schoenoides) and watergrass (Echinochloa crusgallim), are a critical food source for migratory birds. Vegetation maps were created by classifying Landsat imagery from 2007-2011 and 2013-2017. A support vector machine learning classifier was trained using phenology metrics of moist soil seed plants, emergent vegetation, water, and other land cover observed via field surveys and high resolution imagery. Productivity maps of swamp timothy were based on a regression model of seed head weight with Landsat vegetation indices. Estimates of watergrass [...]
Summary
We produced a series of maps of moist soil seed plants within managed wetlands in the Central Valley of California from 2007-2011 & 2013-2017. Moist soil seed plants, such as swamp timothy (Crypsis schoenoides) and watergrass (Echinochloa crusgallim), are a critical food source for migratory birds. Vegetation maps were created by classifying Landsat imagery from 2007-2011 and 2013-2017. A support vector machine learning classifier was trained using phenology metrics of moist soil seed plants, emergent vegetation, water, and other land cover observed via field surveys and high resolution imagery. Productivity maps of swamp timothy were based on a regression model of seed head weight with Landsat vegetation indices. Estimates of watergrass productivity were based on green chlorophyll index values. The final maps show the distribution, extent and productivity of moist soil seed plants within managed wetlands in the Central Valley of California.
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Purpose
The data were created to quantify habitat change within wetlands in the Central Valley of California specifically to quantify moist soil seed plant extent, distribution and productivity.
