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Sources of Variation in the Stable Isotopic Composition of Plants
he use uf slable isolOpes of carbon, njlTogen. oxygen. and hydrogen to sludy J1h y~ iu l og i cil l rroces~es has increa sed exponemiaJly in the past three decades. Whe n Harm llO Cra ig (195 3.Expand
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Hydraulic redistribution of soil water during summer drought in two contrasting Pacific Northwest coniferous forests.
The magnitude of hydraulic redistribution of soil water by roots and its impact on soil water balance were estimated by monitoring time courses of soil water status at multiple depths and root sapExpand
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Carbon isotope discrimination during photosynthesis and the isotope ratio of respired CO2 in boreal forest ecosystems
Our objective was to measure the carbon isotope ratio of CO 2 released by respiration (δ r ) within forest canopies at different times during the growing season and to use this information toExpand
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Carbon isotope discrimination and growth response of old Pinus ponderosa trees to stand density reductions
Stand density reductions have been proposed as a method by which old-growth ponderosa pine ( Pinus ponderosa ) forests of North America can be converted back to pre-1900 conditions, thereby reducingExpand
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Carbon isotope composition of C4 grasses is influenced by light and water supply
The carbon isotope composition of C4 grasses has the potential to be used as an indicator of changes in the isotopic composition and concentration of atmospheric CO2, especially for climateExpand
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Density fractionation of forest soils: methodological questions and interpretation of incubation results and turnover time in an ecosystem context
Soil organic matter (SOM) is often separated by physical means to simplify a complex matrix into discrete fractions. A frequent approach to isolating two or more fractions is based on differingExpand
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Water flux in a hybrid poplar stand.
We studied water flux in a four-year-old stand of hybrid Populus during midsummer 1992. Study trees ranged in height from 11.0 to 15.1 m and in diameter from 8.3 to 15.1 cm. The large-leafed PopulusExpand
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Discrimination against C18O16O during photosynthesis and the oxygen isotope ratio of respired CO2 in boreal forest ecosystems
Our objective was to analyze factors that influence changes in the oxygen isotope ratio (δ18O) of atmospheric CO2 within boreal forest ecosystems. We made measurements in the three major forest typesExpand
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Vertical stratification of soil water storage and release dynamics in Pacific Northwest coniferous forests
We characterized vertical variation in the seasonal release of stored soil moisture in old-growth ponderosa pine (OG-PP, xeric), and young and old-growth Douglas-fir (Y-DF, OG-DF, mesic) forests toExpand
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Compatible taper and volume equations for yellow-poplar in West Virginia
Abstract Compatible segmented polynomial taper and volume functions were developed for yellow-poplar ( Liriodendron tulipifera L.) from two ecoregions of West Virginia. The data were based on stemExpand
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