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Precipitation pulses and carbon fluxes in semiarid and arid ecosystems
It is shown that pulse size regulates C balance by determining the temporal duration of activity for different components of the biota, and a greater understanding of the complexities of these eco-hydrologic systems may enhance the ability to describe the ecology of desert ecosystems and their sensitivity to global change.
Hydraulic redistribution in a stand of Artemisia tridentata: evaluation of benefits to transpiration assessed with a simulation model
Simulation results indicated that redistribution of water by roots can be an important component in soil water dynamics, and the model presented here provides a useful approach to incorporating hydraulic redistribution into larger models of soil processes.
Response of Water Vapor and CO2 Fluxes in Semiarid Lands to Seasonal and Intermittent Precipitation Pulses
Abstract Precipitation pulses are important in controlling ecological processes in semiarid ecosystems. The effects of seasonal and intermittent precipitation events on net water vapor and CO2 fluxes…
Functional Differences in Water‐Use Patterns of Contrasting Life Forms in Great Basin Steppelands
The temporal patterns of evapotranspiration were monitored for 2 yr for four species of differing life form that currently form near monoculture communities in the Great Basin, USA, a region with a…
Functional Differences in Soil Water Pools: a New Perspective on Plant Water Use in Water-Limited Ecosystems
Arid and semi-arid ecosystems cover roughly half of the earth's surface. Significant changes in vegetation cover combined with climate change have increased concern over the future of these lands,…
Carbon isotope composition of tree leaves from Guanacaste, Costa Rica: comparison across tropical forests and tree life history
Despite the progress made in understanding the ecophysiology of tropical plants during the past two decades (Lüttge 1997, Mulkey et al. 1996), questions regarding relationships between the…
Water conservation in Artemisia tridentata through redistribution of precipitation
Simulation results indicate that plants can benefit during drought periods from water storage following both summer rain events and overwinter recharge (large spring pulse), which may aid in sustaining active foliage, maintaining root-soil hydraulic connectivity, and increasing survival probability of plants which remain physiologically active during periods of drought.
Landscape assessment of a stable aspen community in southern Utah, USA
RAPID SOIL MOISTURE RECHARGE TO DEPTH BY ROOTS IN A STAND OF ARTEMISIA TRIDENTATA
The temporal patterns of soil water potential in a stand of Artemisia tridentata in central Utah, USA, were monitored during the summer, which included small periodic rainfall events, and over the…
Root responses and nitrogen acquisition by Artemisia tridentata and Agropyron desertorum following small summer rainfall events
- C. Y. Ivans, A. Leffler, Usha K Spaulding, J. Stark, R. Ryel, M. Caldwell
- Biology, MedicineOecologia
- 11 January 2003
Belowground responses of Artemisia tridentata and Agropyron desertorum, common Great Basin shrub and grass species, respectively, to simulated 5-mm and 15-mm summer rainfall events indicate that these species are capable of utilizing nitrogen pulses following even smallSummer rainfall events during the most stressful period of the summer and further emphasize the importance of small precipitation events in arid systems.