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Keyword: soil

Assessing indicators of rangeland health with remote sensing in southeast Arizona

Publications Posted on: June 13, 2006
The goal of this study was to scale up ground-based range assessments to ranch and landscape scales in southeast Arizona using remote sensing and minimum amount of field data collection. Remotely sensed metrics of canopy cover, biomass, and mesquite composition were used to assess soil and site stability and biotic integrity.

Climate mitigation potential of the San Pedro River riparian zone

Publications Posted on: June 13, 2006
Carbon (C) and nitrogen (N) cycling within an open brush site, a sacaton (Sporobolus wrightii) grass and a mesquite (Prosopis velutina) grove, in the riparian zone was closely linked to the yearly litter N inputs. Yearly mesquite litter fall for 2 yr was remarkably similar and averaged 4.0 g N m-2 and 65 g C m-2 soil and resulted in higher soil C content compared to other riparian vegetation.

How do humans restructure the biodiversity of the Sonoran Desert?

Publications Posted on: June 09, 2006
We studied patterns of biodiversity across the entire urban, suburban, agricultural, and surrounding Sonoran Desert landscape of central Arizona-Phoenix. A probability-based extensive integrated field inventory was used to survey perennial plants, pollen, birds, and sample soil chemistry, supplemented by monthly or quarterly monitoring of arthropod and bird communities at some sites.

Understory vegetation and site factors : implications for a managed Wisconsin landscape

Publications Posted on: July 30, 2004
We investigated relationships between edaphic and environmental factors (soil, forest floor, topography, and canopy) and understory vegetation (composition, richness, and Shannon-Wiener diversity index, H')among 77 plots representing seven major patch types comprising a landscape in northern Wisconsin that has a long history of human management.