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Filters: Tags: aridland processes (X) > partyWithName: Neil E West (X) > partyWithName: John D Williams (X)

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Microphytic crusts form at the soil surface in arid and semiarid rangelands. They bind soil particles together and purportedly influence hydrologic and stability responses to rainfall. We tested this influence in a designed rainfall simulation experiment conducted on a sandy lam site in Capitol Reef National Park, Utah, that had been protected from livestock and human traffic for two to three years. Treatments consisted of microphytic crust conditions: 1) living and undisturbed (control); 2) chemically killed to determine structural influence (chemically killed), and mechanically removed from the soil surface (scalped) to approximate conditions of absence. Microphytic crusts in control and chemically killed treatments...