Conversion of dense lodgepole pine stands in west-central British Columbia into young lodgepole pine plantations using prescribed fire. 2. Effects of burning treatments on tree seedling establishment

1995 ◽  
Vol 25 (2) ◽  
pp. 175-183 ◽  
Author(s):  
B. Blackwell ◽  
M.C. Feller ◽  
R. Trowbridge
Keyword(s):  
Seedling Growth ◽  
Lodgepole Pine ◽  
Fire Severity ◽  
Site Preparation ◽  
Pine Plantations ◽  
Height Increment ◽  
Foliar Chemistry ◽  
Total Height ◽  
Burned Areas ◽  
Foliar Nutrient

The ecological effects of different treatments used to convert dense logdepole pine (Pinusconforta Dougl.) stands into young lodgepole pine plantations are being determined. The treatments used were bulldozing the trees and either broadcast burning the slash or bulldozing the slash into windrows, which were then burned. Burns were conducted under different fuel moisture conditions and state of fuel curing to achieve four classes of fire severity. Lodgepole pine seedling survival was affected by both site preparation and fire severity. Five years after outplanting, survival was significantly (p < 0.05) greater for areas between windrows (81%) than for areas beneath windrows (65%) or for broadcast-burned areas (67%). Survival was greatest after 5 years for low-severity burns in fresh slash (80%) compared with low-severity burns in cured slash and higher severity burns (67–69%). Seedling total height and height increment 5 years after outplanting were significantly greater (p < 0.05) in areas beneath windrows than in areas between windrows or in broadcast-burned areas. However, stem diameter was similar among all site preparation treatments. Fire severity had no effect on lodgepole pine total height, height increment, and basal diameter growth in any year after outplanting. Lodgepole pine seedling foliar nutrient levels were generally consistent with trends in seedling growth in that foliar concentrations generally tended to be higher when growth was higher (in the case of site preparation); however, no significant differences in growth were found (in the case of fire severity). This suggested that foliar nutrient levels could at least partly explain seedling growth results. Surface mineral soil (0–15 cm) chemistry exhibited similar trends to seedling foliar chemistry when site preparation treatments were compared, but not when fire severity classes were compared. This was attributed to foliar chemistry being controlled by factors other than soil chemistry alone.

Prefire heterogeneity, fire severity, and early postfire plant reestablishment in subalpine forests of Yellowstone National Park, Wyoming

1999 ◽  
Vol 9 (1) ◽  
pp. 21 ◽  
Author(s):  
Monica G. Turner ◽  
William H. Romme ◽  
Robert H. Gardner
Keyword(s):  
National Park ◽  
Lodgepole Pine ◽  
Fire Severity ◽  
Tree Density ◽  
Burn Severity ◽  
Percent Cover ◽  
Crown Fire ◽  
Successional Stage ◽  
Burned Areas ◽  
Pine Seedlings

The 1988 fires in Yellowstone National Park providedan opportunity to study effects of a large infrequent disturbance on a natural community. This study addressed two questions: (1) How does prefire heterogeneity of the landscape affect postfire patterns of fire severity? and (2) How do postfire patterns of burn severity influence plant reestablishment? At three sites, 100 sampling points were distributed regularly in a 1-km x 1-km grid and sampled annually from 1989 to 1992. Information was recorded on fire severity (damage to trees, depth of ash and soil charring, and percent mineral soil exposed); pre-fire forest structure (forest successional stage; tree density; tree species; tree size; and evidence of pre-fire disturbance by mountain pine beetle [Dendroctonus ponderosae Hopk.] or mistletoe [Arceuthobium americanum Nutt. ex Engelm.]); post-fire percent cover of graminoids, forbs, and low shrubs; number of lodgepole pine (Pinus contorta var. latifolia Engelm.) seedlings; and general topographic characteristics (slope and aspect). Fire severity was influenced by successional stage, with older stands more likely to be in the more severe burn class, and by tree diameter, with tree damage diminishing with tree size. Prefire bark beetle and mistletoe damage also influenced fire severity; severe prefire damage increased the likelihood of crown fire, but intermediate prefire damage reduced the likelihood of crown fire. Fire severity was not influenced by slope, aspect, or tree density. Postfire percent vegetative cover and density of lodgepole pine seedlings varied with burn severity. In lightly burned areas, percent cover returned to unburned levels by 1991. In severely burned areas, total percent cover was about half that of unburned areas by 1992, and shrub cover remained reduced. Recruitment of lodgepole pine seedlings was greatest during the second postfire year and in severe-surface burns rather than in crown fires. Continued monitoring of vegetation dynamics in Yellowstone’s burned forests will contribute to our understanding of successional processes following a disturbance that was exceptional in its size and severity.

N2-Fixation and Seedling Growth Promotion of Lodgepole Pine by Endophytic Paenibacillus polymyxa

2013 ◽  
Vol 66 (2) ◽  
pp. 369-374 ◽  
Author(s):  
Richa Anand ◽  
Susan Grayston ◽  
Christopher Chanway
Keyword(s):  
Seedling Growth ◽  
N2 Fixation ◽  
Growth Promotion ◽  
Lodgepole Pine ◽  
Paenibacillus Polymyxa

Effects of site preparation on timber and non-timber values of loblolly pine plantations

1998 ◽  
Vol 107 (1-3) ◽  
pp. 47-53 ◽  
Author(s):  
Jianbang Gan ◽  
Stephen H. Kolison ◽  
James H. Miller ◽  
Tasha M. Hargrove
Keyword(s):  
Loblolly Pine ◽  
Site Preparation ◽  
Pine Plantations

PENILAIAN DAMPAK KEBAKARAN PADA TEGAKAN AKASIA DI BKPH PARUNG PANJANG KPH BOGOR, PERUM PERHUTANI UNIT III JAWA BARAT DAN BANTEN Fire Severity Assessment on Akasia stand at BKPH Parung Panjang KPH Bogor, Perum Perhutani III West Java and Banten

2017 ◽  
Vol 8 (1) ◽  
pp. 55-62
Author(s):  
Lailan Syaufina ◽  
Vera Linda Purba
Keyword(s):  
Growth Performance ◽  
Forest Fire ◽  
Health Monitoring ◽  
Fire Severity ◽  
Forest Health ◽  
Chemical Properties ◽  
Fire Effects ◽  
Burned Areas ◽  
Forest Health Monitoring ◽  
Physical And Chemical

Forest fire is one of the problem in forest management. The objectives of the study was to measure the forest fire severity based on soil physical and chemical properties. The forest fire effects were assessed using fire severity method and forest health monitoring plot. The study indicated that the burned areas at BKPH Parung Panjang after two years included in low fire severity. The site properties and growth performance analysis showed that the fire has only affected on pH, Mg and tree diameter significantly, whereas the other parameters such as bulk density, P, N, Na, K, Ca and height were not significantly affected. In addition, both burned and unburned areas are classified as in health condition.Key words : fire severity, forest health monitoring, growth performance, site properties

Evidence of nitrogen fixation in lodgepole pine inoculated with diazotrophic Paenibacillus polymyxa

Botany ◽  
2012 ◽  
Vol 90 (9) ◽  
pp. 891-896 ◽  
Author(s):  
Amandeep Bal ◽  
Christopher P. Chanway
Keyword(s):  
Seedling Growth ◽  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Growth Period ◽  
Paenibacillus Polymyxa ◽  
N Fixation ◽  
Bacterial Strains ◽  
Bacterial Inoculation ◽  
Foliar N ◽  
Negative Effect

Diazotrophic bacteria previously isolated from internal tissues of naturally regenerating lodgepole pine ( Pinus contorta var. latifolia (Dougl.) Engelm.) seedlings were tested for their ability to colonize and fix nitrogen (N) in pine germinants in two experiments. Surface sterilized pine seed was sown in glass tubes containing an autoclaved sand – montmorillonite clay mixture that contained a N-limited nutrient solution labeled with 15N as 0.35 mmol·L–1 Ca(15NO3)2 (5% 15N label). Pine seed was inoculated with one of three of the following bacterial strains: Paenibacillus polymyxa P2b-2R, P. polymyxa P18b-2R, or Dyadobacter fermentans P19a-2R, and seedlings grew for either 27 or 35 weeks. At the end of each plant growth period, P. polymyxa strain P2b-2R was detected in the pine rhizosphere but not inside plant tissues. Pine foliar N concentrations were not affected by bacterial inoculation but significant foliar 15N dilution was observed in seedlings treated with strain P2b-2R (30% and 66%, P < 0.05, in the first and second experiments, respectively). This strain also reduced seedling biomass in both experiments but effects were significant only in the second experiment (36%, P < 0.05). Notwithstanding the negative effect of bacterial inoculation on seedling growth, pine seedlings inoculated with strain P2b-2R derived 30% and 66%, respectively, of their foliar N from bacterial N fixation in two seedling growth experiments. These results demonstrate the possibility that some endophytic diazotrophs facilitate pine seedling growth in N-poor soils.

scholarly journals Above-Ground Net Primary Production, Leaf Area Index, and Nitrogen Dynamics in Early Post-Fire Vegetation, Yellowstone National Park

1997 ◽  
Vol 21 ◽  
pp. 130-134
Author(s):  
Monica Turner ◽  
Rebecca Reed ◽  
William Romme ◽  
Mary Finley ◽  
Dennis Knight
Keyword(s):  
Primary Production ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Yellowstone National Park ◽  
National Park ◽  
Net Primary Production ◽  
Lodgepole Pine ◽  
Fire Severity ◽  
Ecosystem Processes ◽  
Area Index

The 1988 fires in Yellowstone National Park (YNP), Wyoming, affected >250,000 ha, creating a striking mosaic of burn severities across the landscape which is likely to influence ecological processes for decades to come (Christensen et al. 1989, Knight and Wallace 1989, Turner et al.1994). Substantial spatial heterogeneity in early post-fire succession has been observed in the decade since the fires, resulting largely from spatial variation in fire severity and in the availability of lodgepole pine (Pinus contorta var. latifolia) seeds in or near the burned area (Anderson and Romme 1991, Tinker et al. 1994, Turner et al. 1997). Post­fire vegetation now includes pine stands ranging from relatively low to extremely high pine sapling density (ca 10,000 to nearly 100,000 stems ha-1) as well as non-forest or marginally forested vegetation across the Yellowstone landscape may influence ecosystem processes related to energy flow and biogeochemisty. We also are interested in how quickly these processes may return to their pre­ disturbance characteristics. In this pilot study, we began to address these general questions by examining the variation in above-ground net primary production (ANPP), leaf area index (LAI) of tree (lodgepole pine) and herbaceous components, and rates of nitrogen mineralization and loss in successional stands 9 years after the fires. ANPP measures the cumulative new biomass generated over a given period of time, and is a fundamental ecosystem property often used to compare ecosystems (Carpenter 1998). Leaf area (typically expressed as leaf area index [LAI], i.e., leaf area per unit ground surface area) influences rates of two fundamental ecosystem processes -­ primary productivity and transpiration -- and is communities (

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