Toby O’Geen, UC Davis
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variability of soil properties and deep regolith in the Southern Sierra CZO Toby O’Geen, UC Davis Subalpine fores 3000 m Mixed Coniferous Forest 2000 m Pine/Oak Forest 1100 m Oak Savannah 400 m
description
Toby O’Geen, UC Davis. Understanding systematic variability of soil properties and deep regolith in the Southern Sierra CZO. Oak Savannah 400 m. Pine/Oak Forest 1100 m. Mixed Coniferous Forest 2000 m. Subalpine forest 3000 m. Regional patterns in soil development and regolith thickness. - PowerPoint PPT Presentation
Transcript of Toby O’Geen, UC Davis
Understanding systematic variability of soil properties and deep regolith in the
Southern Sierra CZOToby O’Geen, UC Davis
Subalpine forest3000 m
Mixed Coniferous Forest 2000 m
Pine/Oak Forest1100 m
Oak Savannah400 m
Subalpine forest3000 m
Mixed Coniferous Forest 2000 m
Pine/Oak Forest1100 m
Oak Savannah400 m
Degr
ee o
f Wea
ther
ing
Elevation (m)400 1100 2000 3000
Deep regolithSoil
Regional patterns in soil development and regolith thickness
1100 2000 3000
Some pedologic questions:• What are the dominant factors
controlling soil development across the gradient? It may not be what previous studies thought.
• What is the extent of soil variability within each catena?
Soil Variability at San Joaquin Experimental RangeDepth
Some deep regolith questions:
• What soil forming factors are most important in describing spatial patterns in regolith thickness? Do quantifiable proxies exist (i.e. terrain attributes, solar radiation models, gamma-ray imagery)?
• How variable is regolith thickness within each catena? To what extent do terrain attributes describe this variability?
• How do other regolith characteristics very across the CZO transect?
