Jed Anderson, Mitchel P. McClaran, and Peter B. Adler. 2012. Cover and density of semi-desert grassland plants in permanent quadrats mapped from 1915 to 1947. Ecology 93:1492.

Data Paper

Ecological Archives E093-132-D1.

Copyright

Authors
Data Files
Abstract
Metadata

Author(s)

Jed Anderson
Department of Wildland Resources and the Ecology Center
Utah State University
Logan, UT 84322-5230 USA

Mitchel P. McClaran
Scholl of Natural Resources and the Environment
University of Arizona
Tucson, AZ 85721 USA

Peter B. Adler
Department of Wildland Resources and the Ecology Center
Utah State University
Logan, UT 84322-5230 USA
E-mail: peter.adler@usu.edu

Data Files

shapefiles.zip (md5: 356dcc75331a1636d76951e5dc92b606) -- 23,685 Kb (compressed). This is a zipped directory, containing every individual shapefile for each year that each quadrat was mapped.

allrecords_point_features.csv (md5: 0064ce104e44636589c1d602da906b3f) -- 488 Kb, ASCII text, comma separated. No compression scheme was used.

allrecords_polygon_features.csv (md5: 500a6ddf9609ff819085c36ec85b7b79) -- 14,061 Kb, ASCII text, comma separated. No compression scheme was used.

quad_inventory.csv (md5: a18c2922b8c5deb51bd9acb4bdca57fc) -- 17 Kb, ASCII text, comma separated. No compression scheme was used.

quad_info.csv (md5: 426af244c00de99ea09906be4409fee2) -- 12 Kb, ASCII text, comma separated. No compression scheme was used.

precipitation.csv (md5: 0d6a42f671c6685245fe7796254cda0c) -- 66 Kb, ASCII text, comma separated. No compression scheme was used.

species_list.csv (md5: 63d63ad3ed5908be85513d77125d6619) -- 4 Kb, ASCII text, comma separated. No compression scheme was used.

species_name_changes.csv (md5: 7c08d8c5d16a3f1bc9b1289c5c3ed76d) -- 2 Kb, ASCII text, comma separated. No compression scheme was used.

unmapped_plants.csv (md5: 18eb9872087da36ae014be564692e9fe) -- 133 Kb, ASCII text, comma separated. No compression scheme was used.

Abstract

This historical data set consists of 178 permanent 1-m² quadrats located on semi-desert grasslands at the Santa Rita Experimental Range, Arizona, USA. Individual plants in these quadrats were identified and mapped annually (in most cases) from 1915 to 1933 and again in 1947. Quadrats were located in ungrazed exclosures and in pastures grazed at various intensities by livestock. These data provide unique opportunities to test the interactive effects of grazing and climate variables on demographic rates, plant–plant interactions, and population and community dynamics. We provide the following data and data formats: (1) the digitized maps in shapefile format; (2) a tabular representation of centroid or point location (x, y coordinates), basal or canopy cover (m²) for plants mapped as polygons, perimeter length (m), and seedling and clone status for each individual plant record; (3) quadrat information including elevation, livestock grazing history, and proximity to closest long-term rainfall gauge; (4) monthly precipitation values for those gauges; (5) a species list including synonymy of names and plant growth forms; (6) an inventory of the years each quadrat was sampled; and (7) summary information on unmapped plants in each quadrat.

Key words: climate; Geographic Information Systems (GIS); livestock grazing; plant community; plant demography; Sonoran Desert; species interactions.

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