Tree Diversity, Site Index, and Carbon Storage Decrease With Aridity in Douglas-Fir Forests in Western Canada

Managing the Dry Douglas-fir Forests

Uneven-aged interior Douglas-fir stand structure and dynamics are complexas a result of irregular fire history, insect and disease outbreaks, and variousforms of partial harvesting and range use. Stocking, crown closure, canopylayering, size-age relationships, and spatial distribution are highly variablefrom one stand to another and within any one stand. Many different factors<l...

Forest Stand Structure and Pattern of Old-Growth Western Hemlock/Douglas- Fir and Mixed-Conifer Forests

With fire suppression, many western forests are expected to have fewer gaps and higher stem density of shade-tolerant species as light competition becomes a more significant influence on stand pattern and composition. We compared species composition, structure, spatial pattern, and environmental factors such as light and soil moisture between two old-growth forests: Pacific Northwest western he...

Lidar Remote Sensing of the Canopy Structure and Biophysical Properties of Douglas-Fir Western Hemlock Forests

Scanning lidar remote sensing systems have recently and leaf area index (LAI) over a wide range, up to 1200 become available for use in ecological applications. UnMg ha21 of biomass and an LAI of 12, with 90% and like conventional microwave and optical sensors, lidar 75% of variance explained, respectively. Furthermore, we sensors directly measure the distribution of vegetation were able to mak...

Impacts of Swiss needle cast on overstory Douglas-fir forests of the western Oregon Coast Range

1. Oregon State University Department of Forest Ecosystems and Society, Hatfield Marine Science Center, 2030 SE Marine Science Drive, Newport, OR 97365, USA. 2. Oregon State University Department of Forest Engineering, Resources and Management, 218 Richardson Hall, Corvallis, Oregon, 97331; [email protected] 3. Oregon State University Department of Botany and Plant Pathology, 1084 Cordl...

Ecological adaptations in Douglas-fir populations. II. Western Montana