TITLE:
Resin Production in Natural and Artificial Red-Cockaded Woodpecker Cavity Trees
AUTHORS:
David L. Kulhavy, Kimberly B. Rozelle, William G. Ross, Daniel R. Unger, Richard N. Conner
KEYWORDS:
Endangered Species, Red-Cockaded Woodpecker, Resin Sampling, Super Resin Producers, Cavity Trees
JOURNAL NAME:
Open Journal of Forestry,
Vol.5 No.4,
April
3,
2015
ABSTRACT: Resin
flow was measured in red-cockaded woodpecker (Picoides borealis Vieillot) clusters in longleaf pine (Pinus palustris Mill.) in the southern
region of the Angelina National Forest, Texas. Resin flow (ml) at 1.4 m height
over 24 hrs was measured from one 2.5 cm punch through the phloem between 0700
and 1000 hrs from March 1999 to September 2000, for a total of 9 measurements
per tree. Resin was sampled in naturally active cavity trees, artificial
(insert) active, natural inactive, artificial inactive and control pines (84 sample
trees). Resin flow pattern was significantly different during the year, but not
significantly different in the cavity tree type resin flow. Cavity trees in the
90th percentile (>33.0 ml resin in 24 hrs) were defined as super resin
producing. High average resin flows in August 1999 and September 2000 indicate
when to sample resin for potential cavity trees. Regression equations were
produced to estimate future resin production.