Ecotypic variation in Ambrosia dumosa and Larrea tridentata from three sites across the Mojave (2014 - 2018)

These data were acquired from two native Mojave Desert species, Ambrosia dumosa and Larrea tridentata, from 3 sites (50 m x 50 m garden plots) distributed across the differing Mojave Desert ecotones. These sites were located on the Fort Irwin National Training Center (CA), north of Joshua Tree National Park (CA), and north of Saint George (UT). Growth and survivorship data were collected monthly from 2014 to 2018. Canopy projection data was calculated from the measurements using the mathematical equation: pi x 0.5 x L1 x 0.5 x L2, L1 is the longest diameter, L2 is the perpendicular longest diameter (cm squared). Height was measured from the ground to the tallest green leaf (cm).

Data and Resources

Field Value
accessLevel public
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identifier USGS:6170974cd34ea36449a73952
metadata_type geospatial
modified 20210914
old-spatial -116.80701500, 34.22600700, -113.56493200, 37.19902500
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 00f71ecbb6ee14053d123be18af0a71bea9facf1
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spatial {"type": "Polygon", "coordinates": [[[-116.80701500, 34.22600700], [-116.80701500, 37.19902500], [ -113.56493200, 37.19902500], [ -113.56493200, 34.22600700], [-116.80701500, 34.22600700]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • adaptations-biological
  • amerigeo
  • amerigeoss
  • botany
  • ckan
  • ecological-restoration
  • ecology
  • ecotype
  • fast-slow-spectrum
  • fort-irwin-national-training-center
  • geo
  • geoss
  • joshua-tree-national-park
  • national
  • north-america
  • phenological-adaptations
  • reciprocal-transplant-experiment
  • reproductive-tradeoff
  • saint-george
  • united-states
  • usgs-6170974cd34ea36449a73952
  • winter-precipitation-gradient
isopen False
license_id notspecified
license_title License not specified
maintainer Lesley DeFalco
maintainer_email ldefalco@usgs.gov
metadata_created 2025-11-21T15:31:26.608123
metadata_modified 2025-11-21T15:31:26.608127
notes These data were acquired from two native Mojave Desert species, Ambrosia dumosa and Larrea tridentata, from 3 sites (50 m x 50 m garden plots) distributed across the differing Mojave Desert ecotones. These sites were located on the Fort Irwin National Training Center (CA), north of Joshua Tree National Park (CA), and north of Saint George (UT). Growth and survivorship data were collected monthly from 2014 to 2018. Canopy projection data was calculated from the measurements using the mathematical equation: pi x 0.5 x L1 x 0.5 x L2, L1 is the longest diameter, L2 is the perpendicular longest diameter (cm squared). Height was measured from the ground to the tallest green leaf (cm).
num_resources 2
num_tags 22
title Ecotypic variation in Ambrosia dumosa and Larrea tridentata from three sites across the Mojave (2014 - 2018)