Biodiversity

Executive Summary

This executive summary describes the breadth of the entire Madrean Archipelago (MAR) Rapid Ecoregional Assessment (REA) and illustrates examples from all of the products. It does not summarize methods but instead focuses on products, key findings, and limitations. Because of the breadth and number of assessments, this summary is necessarily longer than a typical executive summary and is intended to give a brief but fairly complete picture of the MAR REA results.

Rapid Ecoregional Assessments: Purpose and Scope

The Ciénega de Saracachi area, including Arroyo Santo Domingo and Cañón Quemado, is in the Municipio de Cucurpe in north-central Sonora (30°21’33”N 110°35’29”W), ca. 105 km south of the Arizona border. The vegetation is cottonwood-willow riparian forest in the Ciénega and rocky stream canyons with desert grassland on the slopes above. These upper tributaries of the Río San Miguel are natural corridors on the west side of the Sierras San Antonio and Azul. The flora contains 419 species in 99 families and the fauna 301 species of animals in 83 families.