Point Sampling for Leaf Area Index in Sagebrush Steppe Communities
نویسندگان
چکیده
منابع مشابه
Point Sampling to Stratify Biomass Variability in Sagebrush Steppe Vegetation
Cover and yield are two of the most commonly monitored plant attributes in rangeland vegetation surveys. These variables are usually highly correlated and many previous authors have suggested point-intercept estimates of plant cover could be used as a surrogate for more expensive and destructive methods of estimating plant biomass. When measurement variables are highly correlated, double sampli...
متن کاملTrajectories of change in sagebrush steppe vegetation communities in relation to multiple wildfires.
Repeated perturbations, both biotic and abiotic, can lead to fundamental changes in the nature of ecosystems, including changes in state. Sagebrush steppe communities provide important habitat for wildlife and grazing for livestock. Fire is an integral part of these systems, but there is concern that increased ignition frequencies and invasive species are fundamentally altering them. Despite th...
متن کاملSagebrush Steppe and Pinyon-juniper Ecosystems-
Principal Investigators Jeanne C. Chambers, E. Durant McArthur, Steven B. Monson, Susan E. Meyer, Nancy L. Shaw, and Robin J. Tausch – USDA Forest Service, Rocky Mountain Research Station Robert R. Blank – USDA Agricultural Research Station Steve Bunting – University of Idaho Richard R. Miller – Oregon State University Mike Pellant – USDI Bureau of Land Management Bruce A. Roundy – Brigham Youn...
متن کاملRevegetation of Medusahead-Invaded Sagebrush Steppe
Medusahead (Taeniatherum caput-medusae [L.] Nevski) is an exotic annual grass invading western rangelands. Invasion by medusahead is problematic because it decreases livestock forage production, degrades wildlife habitat, reduces biodiversity, and increases fire frequency. Revegetation of medusahead-invaded sagebrush steppe is needed to increase ecosystem and economic productivity. Most efforts...
متن کاملLeaf area index measurements
Leaf area index (LAI) is a key structural characteristic of forest ecosystems because of the role of green leaves in controlling many biological and physical processes in plant canopies. Accurate LA1 estimates are required in studies of ecophysiology, atmosphere-ecosystem interactions, and global change. The objective of this paper is to evaluate LA1 values obtained by several research teams us...
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ژورنال
عنوان ژورنال: Journal of Range Management
سال: 2001
ISSN: 0022-409X
DOI: 10.2307/4003589