Mark I. Borchert

Contact Info

San Bernardino National Forest
United States Forest Service
602 S. Tippecanoe
San Bernardino , CA , United States

Publications in Fire Ecology

Using Bigcone Douglas-Fir Fire Scars and Tree Rings to Reconstruct Interior Chaparral Fire History
Pages: 35-56
DOI: 10.4996/fireecology.0503035

Bigcone Douglas-fir (Pseudotsuga macrocarpa [Vasey] Mayr) is a long-lived, fire-adapted conifer that is endemic to the Transverse Ranges of southern California. At the lower and middle reaches of its elevational distribution, isolated stands of bigcone Douglas-fir are surrounded by extensive stands of chaparral. Our dendrochronology investigations have revealed that these ancient trees commonly record multiple past fires as fire scars in their lower boles. We hypothesized that the fire-scar record found within and among bigcone Douglas-fir stands reflects the temporal and spatial patterns of fire in the surrounding chaparral.  [Read More]

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Acorn Dispersal of California Black Oak after a Stand-Replacing Fire
Pages: 136-141
DOI: 10.4996/fireecology.0603136

We investigated California black oak (Quercus kelloggii Newberry) acorn dispersal by rodents and birds in the months after a stand-replacing fire in a mixed conifer forest in the San Bernardino Mountains of southern California, USA. The objective of this study was to compare scatter-hoarding in a high-severity burn to that in an unburned forest. In the fall of 2007, we placed 600 magnet-bearing acorns under trees in the unburned area. Of the 600, we recovered 77 (13 %). Dispersers moved acorns an average distance of 5 m and buried them to an average depth of 30 mm.  [Read More]

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