Long-Term Ecological Research (LTER)/AND002: Respiration Patterns of Logs in H.J. Andrews Experimental Forest

LTER - Long-Term Ecological Research Program/H.J. Andrews Forest (AND)

LTER/AND002 [Summary adapted from the LTER Core Data Set Catalog]:

This study examined the seasonal and successional patterns of
respiration losses for four dominant softwood species. This is a
split-plot design, with six blocks or sites, four species (Abies
amabilis, Pseudotsuga menziesii, Thuja plicata, Tsuga heterophylla),
and two positions (top and side). Periodically this set of logs is
examined for respiration rates. Cylinders, 25 cm diameter and 25 cm
tall, are mounted on logs in top and side positions. Drain holes have
been installed on the top mounted cylinders to prevent waterlogging of
the log. Periodically the cylinders are capped and CO2 evolved is
trapped in 0.1 N NaOH solution. Because of the variation in
respiration rate, the amount of solution has varied from 20 to 80
ml. Exposed solutions are then processed by first adding excess BaCl
solution, filtering the precipitate and then titrating with 0.1 N
HCl. Solutions vary in the degree they absorb CO2. The final
calculated value has been adjusted to reflect the changes in trap
efficiency brought about by CO2-absorption.

The Andrews Forest is in the western Cascade Range of Oregon in the
15,800-acre drainage basin of the Lookout Creek, a tributary of Blue
River and the McKenzie River. The area elevation ranges from 1350
feet to 5340 feet and contains excellent examples of Pacific Northwest
conifer forests, wildlife, and ecosystems.

Information about the Long-Term Ecological Research (LTER) Program can
be obtained from:

LTER Network Office
College of Forest Resources AR-10
University of Washington
Seattle, WA 98195
Phone: [phone]
FAX: [phone]
Email: [e-mail]
"http://lternet.edu"

or

National Science Foundation
Division of Environmental Biology
Long-Term Projects in Environmental Biology
Phone: [phone]
Email: [e-mail]