Biological Dimensions of Crack Morphology in Dryland Soils

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Presentation transcript:

Biological Dimensions of Crack Morphology in Dryland Soils Marcus Spiegel Advisers: Kelly Caylor, Associate Professor Keita Decarlo, Ph.D. Candidate

Desiccation Crack Formation

Consequences of Cracks and Crack Morphology Earth-atmosphere gas exchange Flood dyke and dam failure Water and chemical usage in agricultural engineering

Casting the Crack Network

Excavated Crack Casts

Digitizing Crack Networks

Soil Density and Water Content

Qualitative Observations and Ideas for Analysis Animal compaction induces deep and extensive crack networks Bioturbation causes shallower cracks in termite mounds Vegetation can both limit cracking and preserve deep cracks Roots are intertwined in crack networks