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Providing evidence to improve practice

Individual study: Changes in stand structure and composition after restoration treatments in low elevation dry forests of northeastern Oregon

Published source details

Youngblood A., Metlen K.L. & Coe K. (2006) Changes in stand structure and composition after restoration treatments in low elevation dry forests of northeastern Oregon. Forest Ecology and Management, 234, 143-163


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Thin trees within forests: effects on understory plants Forest Conservation

A replicated, randomized, controlled study in 1998-2004 in temperate coniferous forest in Oregon, USA (Youngblood, Metlen & Coe 2006) found no effect of thinning on understory species richness and diversity. Numbers of species/400 m2 plot (thinned: 26; unthinned: 30) and diversity (Shannon's index thinned: 0.12; unthinned: 0.12) were similar between treatments. Data were collected in 2004 in 10-28 plots (400 m2) in each of four thinned (thinned in 1998 to reduce trees basal area from 26 to 16 m2/ha) and four unthinned experimental units.

 

Use prescribed fire: effect on understory plants Forest Conservation

A replicated, randomized, controlled study in 2000-2004 in temperate coniferous forest in Oregon, USA (Youngblood, Metlen & Coe 2007) found no effect of prescribed fire on understory species richness and diversity. Number of species/400 lm2 plot (burned: 29; control: 30) and Shannon-wiener's diversity index (burned: 0.11; control: 0.12) were similar between treatments. Data were collected in 2004 in 10-30 plots (400 m2) in each of four burned (prescribed burnt in 2000) and four control (unburned) experimental units.