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Survey 200 long term study of multiple sites in central Arizona-Phoenix: trees

Publication date: 2005

Author(s):

  • Diane Hope, Global Institute of Sustainability, Arizona State University
  • Corinna Gries, Global Institute of Sustainability, Arizona State University
  • Chris Martin

Abstract:

The Ecological Survey of Central Arizona (ESCA) is an extensive field survey and integrated inventory designed to capture key ecological indicators of the CAP LTER study area consisting of the urbanized, suburbanized, and agricultural areas of metropolitan Phoenix, and the surrounding Sonoran desert. The survey is conducted every five years at approximately 200 sample plots (30m x 30m) that were located randomly using a tessellation-stratified dual-density sampling design. Study plots cover habitats throughout the CAP LTER study area ranging from native Sonoran desert sites to residential yards to an airport tarmac. Measurements include an inventory of all plants (identified to the lowest possible taxonomic unit, typically species), plant biovolume, soil coring for physicochemical properties, arthropod sweep-net sampling, photo documentation, and a visual survey of site and area characteristics. The objectives of the survey are to (1) characterize patches in terms of key biotic, physical, and chemical variables, and (2) examine relationships among land use, general plant diversity, native plant diversity, plant biovolume, soil nutrient status, and social-economic indices along an indirect urban gradient.

Survey 200 was the original name of the project, and it was renamed to ESCA following the survey conducted in 2015. The data set here includes a subset of information from the Survey200/ESCA focusing exclusively on measured and counted trees in the survey plots. Investigators interested in more recent tree survey data, or other variables measured as part of ESCA should search the data catalog for 'ecological survey of central arizona' or 'survey 200'.



Temporal Coverage:

1999-02-01 to 2006-06-30

Geographic Coverage:

Geographic Description: Phoenix metropolitan area in Arizona, USA
Bounding Coordinates:
Longitude:-112.794316 to -111.566698
Latitude:33.838010 to 33.198342

Contact:

Information Manager, 
Global Institute of Sustainability,Arizona State University,POB 875402,Tempe
 caplter.data@asu.edu

Methods used in producing this dataset: Show


Data Files (2) :

Tabular: 27_treeexport_1.csv
Download

Description: Tree

Column Description Type Units
site_id unique numbers and letters used to identify the sites used in this study
 string
samp_date Date of the sampling
 datetime Format: MM/DD/YYYY
scientific_name The species' scientific name
 string
tree_classification Classification of why the tree is in it's location
 string
tree_shape What shape the foliage is
 string
stem_count Count of the tree's major stems
 integer dimensionless
stem_diameter_at Where the stem diameter was measured
 string
Enumeration:
  • DBH: diameter at breast height of 4.5 ft; measured in cm
  • DGH: diameter at ground height; measured if tree too small or stems too numerous at breast height
stem_diameter Measured diameter of the stems
 float centimeter
hight_in_m Height of the tree in meters
 float meter
crown_width_ns crown's width measured north to south
 float meter
crown_width_ew Crown's width measured east to west
 float meter
crown_hight Crown's height
 float meter
missing Number of missing branches
 integer
condition The condition of the tree
 string
Enumeration:
  • Excellent: Less than 1%
  • Excellent: 1 –10%
  • Fair: 11 – 25%
  • Poor: 26 – 50%
  • Critical: 51 – 75%
  • Dying: 76 – 99%
  • Dead: no leaves
estimate Tells if the tree's height was found by estimation or direct measuring
 string

Tabular: 27_tree_individual_export_1.csv
Download

Description: Individual Tree

Column Description Type Units
site_id Unique numbers and letters used to identify the sites used in this study
 string
samp_date Date the samples were taken on
 datetime Format: MM/DD/YYYY
scientific_name The species' scientific name
 string
NW_quadrant Amount of individuals of a species in the northwest quadrant of the site
 integer dimensionless
NE_quadrant Amount of individuals of a species in the northeast quadrant of the site
 integer dimensionless
SW_quarant Amount of individuals of a species in the southwest quadrant of the site
 integer dimensionless
SE_quadrant Amount of individuals of a species in the southeast quadrant of the site
 integer dimensionless

Download EML Metadata for this data package