Title: Toward more robust projections of forest landscape dynamics under novel environmental conditions: embedding PnET within LANDIS-II
Author: De Bruijn, A.; Gustafson, E.J.; Sturtevant, B.R.; Foster, J.R.; Miranda, B.R.; Lichti, N.I.; Jacobs, D.F.;
Source: Ecological Modelling. 287: 44-57.
Publication Series: Scientific Journal (JRNL)
Description: Ecological models built on phenomenological relationships and behavior of the past may not be robustunder novel conditions of the future because global changes are producing environmental conditions that forests have not experienced historically. We developed a new succession extension for the LANDIS-II forest landscape model, PnET-Succession, to simulate forest growth and succession using physiological first principles. PnET-Succession integrates the tree physiology model PnET-II with the existing LANDIS-II Biomass Succession extension. PnET-Succession simulates the competition of tree species cohorts for water and light as a function of photosynthetic processes driven by foliar nitrogen. Competition for wateris simulated on each grid cell through a dynamic soil-water balance that receives precipitation and loses water through runoff, consumption in photosynthesis, and evapotranspiration. Competition for light is modeled by tracking solar radiation through canopy layers according to a standard Beer-Lambert formula. PnET-Succession requires average monthly photosynthetically active radiation, atmospheric CO2 concentration, temperature and precipitation as inputs. The new extension also dynamically calculates species establishment probabilities in each time step as a function of water and radiation stress. We calibrated PnET-Succession to biomass and LAI measurements from the Duke Experimental Forest in North Carolina (USA) and tested the calibrated model against data from the Green Ridge State Forest in Maryland. The new extension shows considerable promise for studying forest response to climate change, including changes in carbon stocks.
Keywords: LANDIS-II, Forest landscape model, PnET-II, Climate change, Carbon sequestration, Tree competition model
- 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.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
XML: View XML
de Bruijn, Arjan; Gustafson, Eric J.; Sturtevant, Brian R.; Foster, Jane R.; Miranda, Brian R.; Lichti, Nathanael I.; Jacobs, Douglass F. 2014. Toward more robust projections of forest landscape dynamics under novel environmental conditions: embedding PnET within LANDIS-II. Ecological Modelling. 287: 44-57.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility