Silviculture of southwestern mixed conifers and aspen : the status of our knowledge /

Jones, John R.

doi:10.5962/bhl.title.98880

Cited by 45 publications

(40 citation statements)

References 26 publications

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“…Thus, some suckering continued in many plots after the worst of the drought, but numbers of suckers have not increased following crown loss and mortality. This is consistent with the ephemeral nature of young aspen suckers: most do not survive (Jones, 1974). Although some suckers arose after the drought, most of even the small suckers probably arose before the recent overstory mortality, which began around 2004 and continued during the study.…”

Section: Roots and Regenerationsupporting

confidence: 82%

Effects and etiology of sudden aspen decline in southwestern Colorado, USA

Worrall

Marchetti

Egeland

et al. 2010

Forest Ecology and Management

153

181

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Section: Roots and Regenerationsupporting

confidence: 82%

Effects and etiology of sudden aspen decline in southwestern Colorado, USA

Worrall

Marchetti

Egeland

et al. 2010

Forest Ecology and Management

153

181

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“…Collectively, these observations suggest that slash (and associated slash treatments) can temper understory response to tree cutting and may be related to reductions in understory vegetation reported in some short-term studies of this review. While in some cases it may be practical to move slash off site, such as moving slash to cover decommissioned roads or skid trails, transporting slash off site is usually impractical, necessitating that slash be left or treated on site (Jones, 1974). Deciding Fig.…”

Section: Short-term Declines: Importance Of Time Overstory Slash Pmentioning

confidence: 99%

Effects of tree cutting and fire on understory vegetation in mixed conifer forests

Abella

Springer

2015

Forest Ecology and Management

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“…Increases in grassland biomass and plant tissue concentrations, forage digestibility, diet quality, and body condition were predicted for elk following the fires (Rowland et al 1983, Hobbs and Spowart 1984, Boyce and Merrill 1989, Christensen et al 1989). Although elk might prefer burned grasslands, they might avoid burned forests during winter because of deeper and more crusted snows under burned canopies (Meiman 1968, Skovlin and Harris 1970, Jones 1974, Davis 1977. For example, elk diets might change following the fires, as previously unpalatable forages might become more palatable to elk following burns (Leege 1969, Asherin 1976); green-up might occur earlier and senescence might occur !ater (Peet et al 1975, Hobbs andSpowart 1984 ); and N may be more concentrated in grass biomass on burned areas.…”

Section: Introductionmentioning

confidence: 99%

Comparative Effects of Elk Herbivory and 1988 Fires on Northern Yellowstone National Park Grasslands

Singer¹,

Harter²

1996

Ecological Applications

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The drought, frequent lightning strikes, and resultant large fires of 1988 in Yellowstone National Park were considered a severa1-century event for the area. They presented an unparalleled opportunity to document the effects of large fires on forage production, forage quality, and herbivory for the largest elk (Cervus elaphus) population in a natural area in North America. We documented elk-grassland dynamics on the Blacktail Plateau on Yellowstone's northern elk winter range following the burning of 25% of the study area in 1988.Contrary to predictions of earlier scientists, grazing of the grasslands by elk prior to the fires did not result in warmer, drier, or less productive bunchgrass communities. Soi! moisture was equivalent, soi! temperatures were cooler, aboveground grass biomass was equivalent in two of three years, and N, macronutrients (Ca, Mg, P, K), and digestibility concentrations were higher on grazed than ungrazed grasslands. Forb biomass, Poa sandbergii biomass, and litter accumulations, however, were less on grazed sites, and more bare ground occurred on grazed (35%) than on ungrazed (24%) grasslands (P < 0.05). Elk herbivory resulted in more documented ecosystem effects for Blacktail Plateau elk than did burning.Two years postfire, burning had increased aboveground biomass of grasslands by 20%. However, digestibility of only o ne (Festuca idahoensis) of three grass species (F. idahoensis, Pseudoroegneria spicata, and Koeleria macrantha) was enhanced. N, cellulose, and macronutrient concentrations in grasses, and digestibility in P. spicata, K. macrantha were unaffected by the fires. In grazed vs. ungrazed areas F. idahoensis, P. spicata, and K. macrantha averaged a 21% higher N concentration, and a 7% higher digestibility. Aboveground herbaceous biomass was greater in grazed than ungrazed areas in one of three years, and total aboveground N yield was greater in two of three years. Forage biomass did in crease postfire and could have benefited elk foraging efficiency. Elk use of burned grasslands increased following the fires (P < 0.05). Elk avoided burned forests during the first three winters postfire (P < 0.05), but elk obtain few of their forages from forest communities on the northern Yellowstone winter range (<10% of feeding observations prefire). The possibility exists that shrub and herbaceous biomass in forest understories will increase after 2:3 yr postfire. Other studies suggest slower recovery, or increases to preburn levels in forests after =6-8 yr. Eventually, the elk might benefit from increased quality and biomass of forages in burned forests. Grazing, by reducing fuels, can alter the extent of burning and create a more patchy fire pattern than occurs on ungrazed areas, thus conserving N that would otherwise be volatilized by burning. We observed no such interaction between elk herbivory and burning, in spite of a sixfold reduction in litter on grazed sites. Burning did not affect N concentrations on either grazed or ungrazed study sites, apparently because accumulations of dead a...

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Silviculture of southwestern mixed conifers and aspen : the status of our knowledge /

Cited by 45 publications

References 26 publications

Effects and etiology of sudden aspen decline in southwestern Colorado, USA

Effects and etiology of sudden aspen decline in southwestern Colorado, USA

Effects of tree cutting and fire on understory vegetation in mixed conifer forests

Comparative Effects of Elk Herbivory and 1988 Fires on Northern Yellowstone National Park Grasslands

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