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| Created: | Nov 19, 2019 at 7:40 a.m. | |
| Last updated: | Nov 21, 2019 at 8:10 p.m. | |
| Citation: | See how to cite this resource | |
| Content types: | Single File Content |
| Sharing Status: | Public |
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Abstract
Shale and sandstone are the most common lithologies of the forested ridges throughout the Appalachian Mountains. The overall goal of this thesis was to determine whether these two rock types impart distinct biogeochemical properties to soils and plants. The effects of rock type (lithology) on soil gas concentration, nutrient concentration and nutrient limitation were studied in the Ridge and Valley province of central Pennsylvania. To increase understanding of lithological controls on soil gases (Chapter 1), we monitored the depth distribution of soil CO2 and O2 concentrations in central Pennsylvania in two watersheds on different lithologies. We deployed gas monitoring instrumentation on two catena transects that included four topographical positions, one located on sandstone and the other on shale. As expected, with increasing soil depth O2 concentrations decreased while pCO2 increased. CO2 and O2 concentrations varied more with topographical position than with lithology, as the valley floor positions in both catenas had the highest pCO2 for a given depth. Both manual sampling from gas access tubes throughout the soil profile and continuous sampling by buried sensors documented these patterns.
Subject Keywords
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Additional Metadata
| Name | Value |
|---|---|
| czos | Shale Hills |
| czo_id | 6639 |
| citation | The following acknowledgment should accompany any publication or citation of these data: Logistical support and/or data were provided by the NSF-supported Susquehanna Shale Hills Critical Zone Observatory. |
| keywords | Soil Gas, CO2, O2, automated sensors, hand sampled, soil moisture, TDR |
| variables | TIMESTAMP, RECORD, O2_30_Avg, O2_80_Avg, DiffVolt_1_Avg, DiffVolt_2_Avg, CO2_30_lo_Avg, CO2_30_hi_Avg, CO2_80_lo_Avg, CO2_80_hi_Avg |
| disciplines | Geophysics, Geochemistry / Mineralogy |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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