Journal
PHYSICA D-NONLINEAR PHENOMENA
Volume 238, Issue 13, Pages 1061-1067Publisher
ELSEVIER
DOI: 10.1016/j.physd.2009.03.004
Keywords
Janzen-Connell effect; Pattern formation; Spatial organization; Trees; Tropical ecosystems
Categories
Funding
- General Sir John Monash Foundation
- US Department of Energy (DOE) [10509-0152, DE-FG02-00ER53015, DE-FG02-95ER62083]
- National Science Foundation [NSF-EAR 0628342, NSF-EAR-0635787]
- BARD [IS3861-06]
- Mellon Foundation
- Rutgers University Pre-Dissertation Travel Grant
- Organization for Tropical Studies
- Amazon Conservation Association (ACA)
Ask authors/readers for more resources
The Janzen-Connell (JC) effect, which hypothesizes that recruitment and growth of seedlings is positively correlated to the distance from the parent tree, is shown to generate highly organized vegetation biomass spatial patterns when coupled to a revised Fisher-Kolmogorov (FK) equation. Spatial organization arises through a novel mechanism of non-local activation and local inhibition. Over a single generation, the revised FK model calculations predict a hen and chicks dynamic pattern with mature trees surrounded by new seedlings growing at characteristic spatial distances in agreement with field data. Over longer timescales, the importance of stochastic dynamics, such as those associated with randomly occurring light gaps, increase thereby causing a substantial deviation between predictions from the deterministic FK model and its stochastic counterpart derived to account for such random disturbances. At still longer timescales, however, statistical measures of the spatial organization, specifically the spatial density of mature trees and their minimum spacing, converge between these two model representations. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available