Including tree spatial extension in the evaluation of neighborhood competition effects in Bornean rain forest.

ABSTRACT: Classical tree neighborhood models use size variables acting at point distances. In a new approach here, trees were spatially extended as a function of their crown sizes, represented impressionistically as points within crown areas. Extension was accompanied by plasticity in the form of crown removal or relocation under the overlap of taller trees. Root systems were supposedly extended in a similar manner. For the 38 most abundant species in the focal size class (10-<100 cm stem girth) in two 4-ha plots at Danum (Sabah), for periods P₁ (1986-1996) and P₂ (1996-2007), stem growth rate and tree survival were individually regressed against stem size, and neighborhood conspecific (CON) and heterospecific (HET) basal areas within incremented steps in radius. Model paramete

SUBMITTER: Newbery DM 

PROVIDER: S-EPMC8207374 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature