You are here: Home
/ Publication Information
Title: The physiological basis for regeneration response to variable retention harvest treatments in three pine species
Author: Powers, Matthew D.; Pregitzer, Kurt S.; Palik, Brian J.; Webster, Christopher R.;
Publication Series: Scientific Journal (JRNL)
Description: Variable retention harvesting (VRH) is promoted for enhancing biodiversity and ecosystem processes in managed forests, but regeneration responses to the complex stand structures that result from VRH are poorly understood. We analyzed foliar stable carbon isotope ratios (δ13C), oxygen isotope ratios (δ18O), light-saturated photosynthetic rates Amax), stomatal conductance (gs) and sizes of pine seedlings in Pinus resinosa stands treated with VRH systems that created different spatial patterns of overstorey retention. Pinus banksiana, P. resinosa and Pinus strobus seedlings in dispersed retention, aggregated retention between small gaps and aggregated retention between large gaps treatments had greater δ13C, em>Amax, gs, diameter and height than seedlings in unharvested treatments, but seedling performance was similar among VRH treatments when averaged across stands. There were no significant differences in δ18O associated with any treatment. These results indicate seedling photosynthetic capacity, water relations and growth wereimproved by VRH, but the spatial pattern of retention had surprisingly little impact on average performance in the first 4 years after harvesting. This suggests retention treatments that produce different residual stand structures can promote similar mean rates of early seedling development when performance is averaged across all of the neighbourhood environments within each treatment.
- 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, firstname.lastname@example.org if you notice any errors which make this publication unusable.
XML: View XML
Powers, Matthew D.; Pregitzer, Kurt S.; Palik, Brian J.;Webster, Christopher R. 2011. The physiological basis for regeneration response to variable retention harvest treatments in three pine species. Forestry (2011) 84(1): 13-22. doi:10.1093/forestry/cpq038
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility