Cedar Decline Research

Yellow-cedar (Chamaecyparis nootkatensis) an economicly and culturally valuable tree. It has experienced an accelerated rate of mortality resulting in vast dead stands in largely pristine forests of Southeast Alaska and Canada since the end of the Little Ice Age in the late 1800s. This website documents our current understanding of the cause of this forest problem and offers a conservation and management strategy.

A TALE OF TWO CEDARS: INTERNATIONAL SYMPOSIUM ON WESTERN REDCEDAR AND YELLOW-CEDAR - Proceedings now available

The Tree

Yellow-cedar tree drawing

Yellow-cedar, the tree, common and scientific names. The cultural and economic value of this long lived tree.

 

Regeneration

Yellow-cedar sapling

The natural regeneration, as well as planting trials, site preparation & young growth management.

 

Detection

Remote sensing, mt edgecome

We apply remote sensing and image analysis techniques at three scales to examine the distribution of both live cedar and forest decline in Canada and Alaska. We analyze decline with respect to terrain features. Fine scale mapping examines microtopography, exposure and tree volume classes.

 

Climate and Epidemology

Snag classes 1, 3 and 5

An exploration of the onset and development of yellow-cedar decline, linking warming climage to the cause of decline.

 

Conservation/ management strategy

Basal area chart with log backdrop

All knowledge of yellow-cedar decline is integrated into suggestions for a conservation and management strategy to ensure the survival of this valuable tree species in the future.

 

Wood Properties

Basal area chart with log backdrop

We evaluate the value of dead yellow-cedar with a range of studies on deterioration pattern, volume recovery, grade of recovery, strength properties, decay resistance, heartwood chemistry and marketing.

 

Causes of Decline

Causes of Yellow Cedar Decline

A history of research on the possible biotic and abiotic causes including: Fungi, Oomycetes, Insects, Nematodes, Viruses, Bears, Temperature, Soil Chemistry, Hydrology, Snow, Exposure & Freezing. We include the leading explanation for the cause of yellow-cedar decline.

 

News

Popular or Recent Yellow-Cedar Publications and Presentations

Complete list of yellow-cedar decline publications

Contacts