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U.S. Geological Survey Open-File Report 2007-1393

In cooperation with the University of Arizona School of Natural Resources

Vascular Plant and Vertebrate Inventory of Coronado National Memorial

Edited by Cecilia A. Schmidt, Brian F. Powell, Don E. Swann, and William L. Halvorson

2007

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Executive Summary

We conducted inventories for amphibians and reptiles, birds, and mammals; and summarized past inventories for vascular plants at Coronado National Memorial (NM) in Arizona. We used our data as well as data from previous research to compile species lists for the memorial, assess inventory completeness, and make suggestions on future monitoring efforts.

There have been 940 species of plants and vertebrates recorded at Coronado NM (Table 1), of which 46 (5%) are non-native. The species richness of the memorial is one of the highest in the Sonoran Desert Network of park units, third only to park units that are two and one-half (Chiricahua National Monument), 19 (Saguaro National Park) and 70 (Organ Pipe Cactus National Monument) times larger in area. The high species diversities are due to the large elevational gradient, overlap of bigeographical regions, wide range of geology and soils, and diverse vegetation communities present at the memorial.

Changes in species composition have occurred at the memorial over the last 20 years in all major taxonomic groups. These changes are likely due to increases in grassy plant species (both native and non-native) at the lower elevations of the memorial. We suspect that grassy plant cover has increased because of changes in grazing intensity, introduction of some non-native species, and a recent fire. All recent vertebrate inventories have yielded grassland obligate species not previously recorded at the memorial.

Based on the review of past studies, we believe the inventory for most taxa, except bats, is nearly complete, though some rare or elusive species will likely be added with additional survey effort.

Cover photo: National Park Service

Version 1.0

First posted July 15, 2009


This report is available only on the Web.


For additional information contact:
Bill Halvorson

Southwest Biological Science Center

This report is presented in Portable Document Format (PDF); at least version 7 of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.


Suggested citation:

Schmidt, C.A., Powell, B.F., Swann, D.E., and Halvorson, W.L., eds., 2007, Vascular plant and vertebrate inventory of Coronado National Memorial: U.S. Geological Survey Open-File Report 2007-1393, 114 p. [https://pubs.usgs.gov/of/2007/1393/].



Contents

Acknowledgments

Executive Summary

Chapter 1: Introduction to Biological Inventories At Coronado National Memorial

Chapter 2: Memorial Overview

Chapter 3: Plant Inventory

Chapter 4: Reptiles and Amphibians Inventory

Chapter 5: Bird Inventory

Chapter 6: Mammal Inventory

Chapter 7: Literature Cited

appendixes A–Q


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