NDLI: Effects of surrounding vegetation and soil moisture on establishment of Artemisia tridentata ssp. vaseyana seedlings following burning of sagebrush steppe

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Effects of surrounding vegetation and soil moisture on establishment of Artemisia tridentata ssp. vaseyana seedlings following burning of sagebrush steppe

Content Provider	Semantic Scholar
Author	DiCristina, Katherine Germino, Matthew J. Seefeldt, Steven S.
Copyright Year	2004
Abstract	Factors affecting establishment of Artemisia tridentata ssp. vaseyana (mountain big sagebrush) seedlings are important for a basic understanding of disturbance and succession in sagebrush-steppe, yet are not well known. We investigated how interactions with surrounding vegetation might affect the establishment of A. t. vaseyana seedlings after fire, by recording distances to surrounding vegetation for nearly 300 seedlings of A. t. vaseyana in sites that had burned 1, 4, 5, or 8 years prior to sampling. Biomass and distances of A. t. vaseyana seedlings to neighboring vegetation were also evaluated in watered treatment plots and unwatered control plots to determine the potential role of water in interactions of seedlings and surrounding vegetation. A. t. vaseyana seedlings were found at greater distances from surrounding vegetation in the site most recently burned, compared to in sites that burned 4, 5, or 8 years earlier. Distances of A. t. vaseyana seedlings were greater to forbs than to shrubs or grasses. Root:shoot biomass ratios decreased with increasing distance from surrounding vegetation for emergent seedlings that received supplemental water in the 2002 burn. Biomass and root:shoot ratios of A. t. vaseyana seedlings were less responsive to surrounding vegetation in unwatered plots, indicating that the intensity of competitive responses may be diminished by limited growth occurring under dry conditions. No emergent seedlings of A. t. vaseyana were detected in sites burned before 2002, and age distributions in each burn site indicated that seedling emergence occurs primarily in the year following fire. These data indicate that fire in mountain big sagebrush communities
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://giscenter.isu.edu/research/techpg/nasa_weeds/pdf/ms_plantecol_katie.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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