Reports and Journal Articles
The Sierra la Mariquita is a Sky Island mountain in northern Sonora owned by the Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), the Mexican national astronomy agency. The Observatorio Astrofísico Guillermo Haro was built on the… See more
Date published:
Published by:
In the course of a revision of the New World Ebenaceae for "Flora Neotropica" and some regional floras, specimens from ca. 100 herbaria have been studied. Diospyros reinae, a new species from Sonora (northwestern Mexico) is described here. The taxa… See more
Date published:
Published by:
Date published:
Published by:
2015 brief on Phrynosoma cornutum in Sonora and SE Arizona.
Date published:
Published by:
The Mexico Tortoise Project, 2001-2013
We surveyed 43 localities in Sonora and Sinaloa, Mexico during 2005-2013 to collect information on the status, ecology, and genetics of desert tortoises (Gopherus morafkai). We measured and photographed… See more
Date published:
Published by:
For many reasons, Sonora has historically been rather isolated from the rest of Mexico. It is the farthest state from Mexico City and long viewed by the country’s strong central government as a “frontier region” or, worse, a dry desert wasteland.… See more
Date published:
Published by:
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… See more
Date published:
Published by:
(Parent paper is here)
Overview of Appendix
This appendix contains the conceptual models and ecological status assessment results for the species selected as conservation elements (CEs) for the Madrean Archipelago REA. Appendix A describes the… See more
Date published:
Published by:
Projected changes in global rainfall patterns will likely alter water supplies and ecosystems in semiarid regions during the coming century. Instrumental and paleoclimate data indicate that natural hydroclimate fluctuations tend to be more energetic… See more
Date published:
Published by:
Thirty-eight plant taxa are reported for Sonora, Mexico, for the first time. Specimens, observations, and images are deposited in herbaria and are available in the SEINet online databases.
Date published:
Published by:
This presentation is meant to stimulate action by informing others of the nature of our goals and the urgency of the need for persons with the expertise in real estate law and land acquisition to engage our problem.
For the last 12 years, the… See more
Date published:
Published by:
A floristic account is provided for the cactus family as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in the heart of… See more
Date published:
Published by:
This report summarizes my efforts to describe the distribution, abundance, habitat, and biogeographical relationships of breeding birds in montane vegetation communities in the Sky Islands and adjacent Sierra Madre Occidental of northwest Mexico.… See more
Date published:
Published by:
The Sierra de Bacadéhuachi is a poorly sampled extension of the Sierra Madre Occidental (SMO) located in east-central Sonora near the town of Bacadéhuachi. Sampling of moths using mercury vapor and ultraviolet lights occurred in summer and fall… See more
Date published:
Published by:
The Santa Cruz River and other riparian areas in the watershed have long been the backbone of the region’s natural and cultural heritage. This rich history is highlighted in the State of the Santa Cruz River.
This companion document, State of the… See more
Date published:
Published by:
The Santa Cruz River has a compelling human history. Telling this story can awaken a deeper emotional curiosity about the river and entice more people to explore the region’s rich heritage. The Sonoran Institute is not the first to recognize and… See more
Date published:
Published by:
Bighorn sheep (Ovis canadensis) were not known to live on Tiburón Island, the largest island in the Gulf of California and Mexico, prior to the surprisingly successful introduction of 20 individuals as a conservation measure in 1975. Today, a stable… See more
Date published:
Published by:
Erpetogomphus molossus is described from 3 male and 3 female specimens (holotype and allotype in collection of Instituto Biologico de la Universidad Nacional Autónoma de México) from the intermittent pine-oak woodland of the Yécora municipio in… See more
Date published:
Published by:
Investigations of processes that drive animal distribution and abundance are often approached at one of two different scales and therefore focus on different processes. At local scales, animals are thought to select home ranges or territory patches… See more
Date published:
Published by:
The floras of the tropical vegetation in the Sky Island Sierra la Madera (SMA) near Moctezuma in northeastern Sonora (30°00’N 109°18’W) and the Yécora (YEC) area in the Sierra Madre Occidental (SMO) in eastern Sonora (28°25’N 109°15”W) were… See more
Date published:
Published by:
Ejido Tonibabi is located 12 kilometers east-northeast of Moctezuma in east-central Sonora, México (29°50’16’’N 109°33’45’’W, 780 m elevation). The vegetation is riparian in the wetlands and foothills thornscrub on slopes. The flora was inventoried… See more
Date published:
Published by:
Flowery rhetoric often gives birth to new terms that convey images and concepts, lead to inspiration and initiative. On the 1892-1894 expedition to resurvey the United States-Mexico boundary, Lieutenant David Dubose Gaillard described the Arizona-… See more
Date published:
Published by:
May 1–5, 2012 Tucson, Arizona
The Madrean Archipelago or Sky Islands region of the southwestern United States and northern Mexico is recognized for its unique biological diversity, natural beauty, and cultural heritage. This 2012 conference brought… See more
Date published:
Published by:
Amphibians and reptiles were observed in the Sierra La Madera (59 species), an isolated Sky Island mountain range, and the Sierra Bacadéhuachi (30 species), the westernmost mountain range in the Sierra Madre Occidental (SMO) range in east-central… See more
Date published:
Published by: