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Title: Comparisons among species composition, leaf area, and water relations in three shrub-steppe plant communities

Observations were made on plant communities dominated by Bromus tectorum (cheatgrass site), Artemisia tridentata (sagebrush site), and Grayia spinosa (hopsage site). Leaf area on a ground area basis of sagebrush was nor significantly different between the sagebrush and hopsage sites; however, the leaf area of hopsage was one-quarter that of sagebrush at the hopsage site. Pre-dawn xylem water potential of sagebrush was -2.91 MPa, while that of hopsage was -4.79 MPa. Stomatal conductance and transpiration rate of sagebrush and hopsage were nearly the same. 11 refs., 4 figs., 2 tabs.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
6906439
Report Number(s):
PNL-SA-14776
ON: DE88013118
DOE Contract Number:
AC06-76RL01830
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Research Org:
Pacific Northwest Lab., Richland, WA (USA)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GROUND COVER; SPATIAL DISTRIBUTION; LEAVES; SURFACE AREA; PLANTS; BIOLOGICAL STRESS; WATER REQUIREMENTS; TERRESTRIAL ECOSYSTEMS; DISTURBANCES; ARID LANDS; COMPARATIVE EVALUATIONS; MOISTURE; SHRUBS; SOILS; STOMATA; DISTRIBUTION; ECOSYSTEMS; OPENINGS; SURFACE PROPERTIES 510500* -- Environment, Terrestrial-- Site Resource & Use Studies-- (-1989)