We investigated variation in carbon stock in soils and detritus (forest floor and woody debris) in chronosequences that represent the range of forest types in the US Pacific Northwest. Stands… More

As forests age, their structure and productivity change, yet in some cases, annual rates of water loss remain unchanged. To identify mechanisms that might explain such observations, and to determine… More

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 to evaluate changes… More

Variation in the carbon isotopic composition of ecosystem respiration (δ13CR) was studied for 3  years along a precipitation gradient in western Oregon, USA, using the Keeling plot approach. Study sites… More

Drought stress plays an important role in determining both the structure and function of forest ecosystems, because of the close association between the carbon (C) and hydrological cycles. We used… More

Sources and sinks of carbon associated with forests depend strongly on the management regime and spatial patterns in potential productivity. Satellite remote sensing can provide spatially explicit information on land… More

Below-canopy eddy covariance measurements of CO2 flux (Fcb) and soil surface CO2flux measurements (Fs) were made seasonally in a ponderosa pine forest in central Oregon in 1996 and 1997. The… More

The development of digital videography has generated interest in the use of these instruments to estimate vegetation variables such as leaf area index (LAI) and light intercepted (fIPAR) by shrubs… More