Spatial and Chronological Patterns of Purshia Tridentata as Influenced by Pinus Ponderosa

Sherman, Robert J.; Chilcote, William W.

doi:10.2307/1934085

Cited by 21 publications

(24 citation statements)

References 10 publications

(10 reference statements)

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“…Sprouting success increased from essentially none following the 1991 burns to 4% following the 2002 burns at Sugar Cast, and was approximately 10% at East Fort Rock following both burns (Table 2). This finding concurs with previous reports showing post-fire bitterbrush sprouting under 10% in interior Oregon pine forests (Driscoll, 1963;Sherman and Chilcoate, 1972;Martin, 1983). Only Busse et al (2000) reported mild sprouting success following prescribed burning in the region.…”

Section: Model Parametersupporting

confidence: 93%

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Response of antelope bitterbrush to repeated prescribed burning in Central Oregon ponderosa pine forests

Busse

Riegel

2009

Forest Ecology and Management

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Section: Model Parametersupporting

confidence: 93%

“…Bitterbrush is a fire-sensitive species, preferring open-canopy pine stands with seedbeds relatively free of surface organics for seedling establishment (Sherman and Chilcoate, 1972;Edgerton, 1983). How it responds following fire, however, is difficult to predict.…”

Section: Introductionmentioning

confidence: 99%

Response of antelope bitterbrush to repeated prescribed burning in Central Oregon ponderosa pine forests

Busse

Riegel

2009

Forest Ecology and Management

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“…Dry forests in northern Arizona and Colorado had much lower historical levels of understory shrubs, with shrubs present on only 0.3-11.1% of forest area, except 18.3% in the Blue Mountains, still much lower than in the eastern Cascades (Williams and Baker, in press). The main shrubs in Oregon's eastern Cascade dry forests historically and today are: (1) greenleaf manzanita, which resprouts from underground lignotubers or from seed (Ruha et al 1996), (2) snowbrush ceanothus, with fire-stimulated resprouting and seeds (Conard et al 1985), and (3) antelope bitterbrush, which regenerates rapidly after fire from rodent seed caches (Sherman and Chilcote 1972) or other means (Busse and Riegel 2009). Abundant fire-adapted shrubs capable of rapid recovery after fire suggest these forests lacked extended periods or areas without shrubs, as shown by the reconstructions.…”

Section: Discussionmentioning

confidence: 99%

Implications of spatially extensive historical data from surveys for restoring dry forests of Oregon's eastern Cascades

Baker

2012

Ecosphere

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Abstract. Dry western forests (e.g., ponderosa pine and mixed conifer) were thought to have been historically old and park-like, maintained by low-severity fires, and to have become denser and more prone to high-severity fire. In the Pacific Northwest, early aerial photos (primarily in Washington), showed that dry forests instead had variable-severity fires and forest structure, but more detail is needed. Here I used pre-1900 General Land Office Surveys, with new methods that allow accurate reconstruction of detailed forest structure, to test eight hypotheses about historical structure and fire across about 400,000 ha of dry forests in Oregon's eastern Cascades. The reconstructions show that only about 13.5% of these forests had low tree density. Forests instead were generally dense (mean ¼ 249 trees/ha), but density varied by a factor of 2-4 across about 25,000-ha areas. Shade-tolerant firs historically were 17% of trees, dominated about 12% of forest area, and were common in forest understories. Understory trees and shrubs dominated on 83.5%, and were dense across 44.8% of forest area. Small trees (10-40 cm dbh) were .50% of trees across 72.3% of forest area. Low-severity fire dominated on only 23.5%, mixed-severity fire on 50.2%, and high-severity fire on 26.2% of forest area. Historical fire included modest-rotation (29-78 years) lowseverity and long-rotation (435 years) high-severity fire. Given historical variability in fire and forest structure, an ecological approach to restoration would restore fuels and manage for variable-severity fires, rather than reduce fuels to lower fire risk. Modest reduction in white fir/grand fir and an increase in large snags, down wood, and large trees would enhance recovery from past extensive logging and increase resiliency to future global change. These forests can be maintained by wildland fire use, coupled, near infrastructure, with prescribed fires that mimic historical low-severity fires.

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“…Unlike big sagebrush, bitterbrush seed is produced prior to summer and fall fires and seeds are actively dispersed by rodents through caching activities (Nord 1965;West 1968;Sherman and Chilcote 1972;Vander Wall 1994). Rodent caches typically occur within 80 ft (25 m) of the mother plant and are important for seedling establishment (Vander Wall 1994).…”

Section: Antelope Bitterbrushmentioning

confidence: 99%

A review of fire effects on vegetation and soils in the Great Basin Region: response and ecological site characteristics

Miller¹,

Chambers²,

Pyke³

et al. 2013

131

322

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This review synthesizes the state of knowledge on fire effects on vegetation and soils in semi-arid ecosystems in the Great Basin Region, including the central and northern Great Basin and Range, Columbia River Basin, and the Snake River Plain. We summarize available literature related to: (1) the effects of environmental gradients, ecological site, and vegetation characteristics on resilience to disturbance and resistance to invasive species; (2) the effects of fire on individual plant species and communities, biological soil crusts, seed banks, soil nutrients, and hydrology; and (3) the role of fire severity, fire versus fire surrogate treatments, and post-fire grazing in determining ecosystem response. From this, we identify knowledge gaps and present a framework for predicting plant successional trajectories following wild and prescribed fires and fire surrogate treatments. Possibly the three most important ecological site characteristics that influence a site's resilience (ability of the ecological site to recover from disturbance) and resistance to invasive species are soil temperature/moisture regimes and the composition and structure of vegetation on the ecological site just prior to the disturbance event.

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Spatial and Chronological Patterns of Purshia Tridentata as Influenced by Pinus Ponderosa

Cited by 21 publications

References 10 publications

Response of antelope bitterbrush to repeated prescribed burning in Central Oregon ponderosa pine forests

Response of antelope bitterbrush to repeated prescribed burning in Central Oregon ponderosa pine forests

Implications of spatially extensive historical data from surveys for restoring dry forests of Oregon's eastern Cascades

A review of fire effects on vegetation and soils in the Great Basin Region: response and ecological site characteristics

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