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Convergence across biomes to a common rain-use efficiency
It is shown that RUE decreases across biomes as mean annual precipitation increases, and during the driest years at each site, there is convergence to a common maximum RUE (RUEmax) that is typical of arid ecosystems.
Mechanisms Associated With Decline of Woody Species in Riparian Ecosystems of the Southwestern U.S.
Throughout western North America, riparian ecosystem function has been transformed by anthropogenic influences on riverine environments. Modified flood frequency, duration, or intensity; depressed…
Consequences of More Extreme Precipitation Regimes for Terrestrial Ecosystems
ABSTRACT Amplification of the hydrological cycle as a consequence of global warming is forecast to lead to more extreme intra-annual precipitation regimes characterized by larger rainfall events and…
Assessing the Response of Terrestrial Ecosystems to Potential Changes in Precipitation
Abstract Changes in Earth's surface temperatures caused by anthropogenic emissions of greenhouse gases are expected to affect global and regional precipitation regimes. Interactions between changing…
Elevated CO2 increases productivity and invasive species success in an arid ecosystem
Using free-air CO2 enrichment (FACE) technology in an intact Mojave Desert ecosystem, it is shown that new shoot production of a dominant perennial shrub is doubled by a 50% increase in atmospheric CO2 concentration in a high rainfall year, but elevated CO 2 does not enhance production in a drought year.
Functional responses of plants to elevated atmospheric CO2– do photosynthetic and productivity data from FACE experiments support early predictions?
Contents Summary 1 I. Introduction 2 II. Early assessments of [CO2] responses in natural ecosystems 2 III. Global network of FACE sites 4 IV. Assimilation and leaf N-content 5 …
Water Uptake in Woody Riparian Phreatophytes of the Southwestern United States: A Stable Isotope Study.
- D. E. Busch, N. Ingraham, Stanley D. Smith
- Environmental ScienceEcological applications : a publication of the…
- 1 November 1992
Associations of isotopic ratios with water relations parameters indicated high levels of canopy evaporation and possible use of moisture from unsaturated alluvial soils in addition to groundwater in Tamarix.
Water Use by Tamarix Ramosissima and Associated Phreatophytes in a Mojave Desert Floodplain
Results from this and other studies demonstrate that, at least under moderate to high water tables, key variables controlling water use by riparian stands include structural character- istics such as LAI and density.
Soil resource heterogeneity in the Mojave Desert
Clearly, soil resources for plants are spatially heterogeneous in this desert ecosystem and differ greatly between adjacent micro- and macrosites in this L. tridentata–A.
Crassulacean Acid Metabolism
Plants with crassulacean acid metabolism (CAM) are rarely the most abundant in plant communities, and rarely attain high biomass, but they are capable of an extraordinary array of physiological…