%0 Journal Article
%T Modeling Young Stand Development towards the Old-Growth Reference Condition in Evergreen Mixed-Conifer Stands at Headwaters Forest Reserve, California
%A John-Pascal Berrill
%A Christopher B. Beal
%A David H. LaFever
%A Christa M. Dagley
%J Forests
%D 2013
%I MDPI AG
%R 10.3390/f4020455
%X We sought to answer the question: How do we restore characteristics of old-growth evergreen mixed-conifer forests in young even-aged stands on upland terrain at Headwaters Forest Reserve (HFR)? We described the old-growth reference condition for three stands at HFR. In each old-growth stand, trees within a 1-ha plot were inventoried. We found coast Douglas-fir ( Pseudotsuga menziesii var. menziesii) and tanoak ( Notholithocarpus densiflorus) well represented while coast redwood ( Sequoia sempervirens) dominated in terms of size. Numbers of understory and overstory trees ha £¿1 and average tree sizes were similar among sites, suggesting these were useful goals for restoration. Adjacent to each old-growth stand, we measured recent growth rates of second-growth trees and remnant old trees across a range of tree sizes, stand structures, and densities. The resultant growth models of redwood and Douglas-fir enabled us to project the development of precommercially thinned young stands at HFR forward in time under two silvicultural prescriptions: (i) no further management; and (ii) partial harvesting simulated before trees attained 30 cm dbh. The partial-harvesting prescription reduced stand density and set the young stand on a more rapid trajectory towards the reference condition found at HFR.
%K coast redwood
%K Douglas-fir
%K forest restoration
%K precommercial thinning
%K Pseudotsuga menziesii
%K Sequoia sempervirens
%K stand density management
%U http://www.mdpi.com/1999-4907/4/2/455