Riparian grasslands dominated by Sporobolus wrightii (big sacaton) are key resources for watershed function, livestock, and wildlife. The upper Cienega Creek watershed in SE Arizona is thought to harbor some of the region’s most extensive sacaton stands. This study maps the distribution of sacaton stands in the watershed, assesses their status, and tests methods for use in other valley bottoms in the region. A more detailed report is available here.Download file (3.4MB)
Grasslands of the Sky Islands region once covered over 13 million acres in southeastern Arizona and adjacent portions of New Mexico, Sonora, and Chihuahua. Roughly two-thirds of these remain as intact or restorable grassland habitat that provide watershed services such as flood control and aquifer recharge across the region, and continue to support dozens of species of concern. This study merged grassland condition assessments, information on grassland species, and expert knowledge to prioritize grassland landscapes across the region.Download file (1.8MB)
Riparian grasslands dominated by big sacaton (Sporobolus wrightii) once covered floodplains across the southwest, but have been reduced to some 5% of their historical extent. Sacaton stands that remain provide key resources for watershed function, wildlife, and livestock—yet may need special management to sustain these benefits. This report describes mapping methods and management recommendations that can be applied to riparian grasslands throughout the region. By examining sacaton grasslands in the Las Cienegas National Conservation Area, this project also refines methods for evaluating ecological condition, and provides managers at this site with detailed maps of both high-quality habitat and restoration needs.Download file (5.6 MB)
A GIS data set depicting the results of a two-year study to delineate grasslands and evaluate their ecological condition in Arizona, southwestern New Mexico, and northern Mexico. This study was completed with the assistance of resource professionals from U.S. and Mexico universities and public agencies.
This study reviews BLM’s fire management plans for Arizona, assessing the accuracy, standardization, and ecological relevance of current Phase I fire management areas. This second report documenting the results of TNC’s Arizona Grassland Assessment also makes recommendations for revisions to BLM’s fire management areas based on fire ecology and other considerations.Download file (3.5 MB)
This report is the first of two studies completed by TNC and partners to delineate the spatial extent and ecological condition of grasslands in central and southern Arizona, southwestern New Mexico, and northern Mexico. This report covers the 30-million acre Apache Highlands Ecoregion.
See also An Ecological Assessment of BLM’s Current Fire Management Practices and Arizona Grasslands Assessment GIS Data for related reports and data.Download file (1 MB)
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