Title: California black oak response to nitrogen amendment at a high O3, nitrogen-saturated site
Author: Grulke, Nancy; Dobrowolski, W.; Mingus, P.; Fenn, M.E.;
Source: Environmental Pollution. 137(3): 536-545.
Publication Series: Scientific Journal (JRNL)
Description: In a nitrogen (N) saturated forest downwind from Los Angeles, California, the cumulative response to long-term background-N and N-amendment on black oak (Quercus kelloggii) was described in a below-average and average precipitation year. Monthly measurements of leaf and branch growth, gas exchange, and canopy health attributes were conducted. The effects of both pollutant exposure and drought stress were complex due to whole tree and leaf level responses, and shade versus full sun leaf responses. N-amended trees had lower late summer carbon (C) gain and greater foliar chlorosis in the drought year. Leaf water use efficiency was lower in N-amended trees in midsummer of the average precipitation year, and there was evidence of poor stomatal control in full sun. In shade, N-amendment enhanced stomatal control. Small differences in instantaneous C uptake in full sun, lower foliar respiration, and greater C gain in low light contributed to the greater aboveground growth observed.
Keywords: Quercus kelloggii, gas exchange, growth, water use efficiency, nitrogen fertilization, stomatal behavior.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Grulke, N.E.; Dobrowolski, W.; Mingus, P.; Fenn, M.E. 2005.California black oak response to nitrogen amendment at a high O3, nitrogen-saturated site. Environmental Pollution. 137(3): 536-545.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility