Jul 27, 2015

The genetic basis of cone serotiny in Pinus contorta as a function of mixed-severity and stand-replacement fire regimes

BioRxiv : the Preprint Server for Biology
Mike FeduckBrad Hawkes

Abstract

Wildfires and mountain pine beetle (MPB) attacks are important contributors to the development of stand structure in lodgepole pine, and major drivers of its evolution. The historical pattern of these events have been correlated with variation in cone serotiny (possessing cones that remain closed and retain seeds until opened by fire) across the Rocky Mountain region of Western North America. As climate change brings about a marked increase in the size, intensity, and severity of our wildfires, it is becoming increasingly important to study the genetic basis of serotiny as an adaptation to wildfire. Knowledge gleaned from these studies would have direct implications for forest management in the future, and for the future. In this study, we collected physical data and DNA samples from 122 trees of two different areas in the IDF-dk of British Columbia; multi-cohort stands (Cariboo-Chilcotin) with a history of mixed-severity fire and frequent MPB disturbances, and single-cohort stands (Logan Lake) with a history of stand replacing (crown) fire and infrequent MPB disturbances. We used QuantiNemo to construct simulated populations of lodgepole pine at five different growth rates, and compared the statistical outputs to physical data...Continue Reading

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Mentioned in this Paper

Study
Size
Trees (plant)
Allergy Testing Pine
Heredity
Heredity Aspects
Pinus ponderosa
Cone Dosage Form
Dendroctonus ponderosae
Hepatic Encephalopathy

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