The effects of topography on forest soil characteristics in the Oregon Cascade Mountains (USA): implications for the effects of climate change on soil propertiesAuthor(s): R.P. Griffiths; M.D. Madritch; A.K. Swanson
Source: Forest Ecology and Management DOI: 10.1016/j.foreco.2008.08.010
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (2.31 MB)
Forest soil measurements were made at over 180 sites distributed throughout the H.J. Andrews Experimental Forest (HJA) in the Oregon Cascade Mountains. The influences of both elevation and aspect on soil variables were measured in the early (1998) and late summer (1994). Increased elevation significantly increased soil moisture, mean annual precipitation, soil organic matter, labile C and mineralizable N, microbial activities, extractable ammonium, and denitrification potentials. In contrast, bulk density, pH, and soil temperature (1998 only) were significantly lower at the higher elevations. Relative to labile C, mineralizable N was preferentially sequestered at higher elevations. Aspect significantly affected annual mean temperature and precipitation, soil moisture and temperature, soil organic matter, mineralizable N, extractable ammonium, denitrification, and microbial activities. There were no significant higher statistical interactions between elevation and aspect on climatic or soil factors. Soil organic matter (SOM) accumulation at higher elevations is likely driven by a reduction in decomposition rates rather that an increase in primary productivity, however, SOM accumulation on north-facing slopes is probably due to both a decrease in decomposition and an increase in primary production. Models of climate change effects on temperate forest soils based on elevational studies may not apply to aspect gradients, as plant productivity may not respond to temperature-moisture gradients in the same way across all topographical features.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationGriffiths, R.P.; Madritch, M.D.; Swanson, A.K. 2009. The effects of topography on forest soil characteristics in the Oregon Cascade Mountains (USA): implications for the effects of climate change on soil properties. Forest Ecology and Management. 257:1-7.
KeywordsSoil, soil biology, soil organic matter, climate change
- Short-term variability in labile soil phosphorus is positively related to soil moisture in a humid tropical forest in Puerto Rico
- Changes in microbial community characteristics and soil organic matter with nitrogen additions in two tropical forests
- Winter climate change affects growing-season soil microbial biomass and activity in northern hardwood forests
XML: View XML