Nutrient Content of Leaf Litter of Trees in the Northern Rocky Mountains

Daubenmire, R.

doi:10.2307/1931341

Cited by 38 publications

(22 citation statements)

References 9 publications

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“…Fr. Daubenmire (1953) found that aspen leaf litter contained higher levels of nitrogen, phosphorus, potassium, and calcium in comparison with a variety pine and fir species.…”

Section: Soilsmentioning

confidence: 93%

Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: Extent, severity, and causal factors

Dudley

Burns

Jacobi

2015

Forest Ecology and Management

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We established 573 random roadside survey plots in stands that contained at least 50% aspen cover type. From these random plots, we found average standing aspen tree mortality ranged from 3.3 to 23.7 % on the four national forests and 11% on the east side of the continental divide and 4 % on the west side. Low elevation stands had significantly less mortality (7%) vs. high elevation (8%). The roadside plot data suggests that Colorado's aspen on these four national forests overall were healthy; mortality rates iii among aspen were fairly low (~3 -8%) among all stems, and average percent live crown among adults was high (~85 -90%), in spite of nearly ubiquitous presence of disease (~97 -99%) and high incidence of insect damage (~50 -75%).We also established 98 aspen stand assessment plots with half of the plots in damaged stands, as defined by U.S.D.A. Forest Service aerial detection surveys (ADS), and half in healthy aspen stands. Damaged stands were defined as those stands with (1) thinning crowns among at least 25% of adult aspen, (2) stands with moderate (<50% of stems) levels of overstory mortality, or (3) stands with high (>50% of stems) levels of overstory mortality. Healthy aspen stands were defined as having (1) a maximum mortality rate of 5 -7% among all aspen, and/or (2) more than 75% of adult aspen with full crowns.Adult aspen in damaged stands tended to be less vigorous, based a health score index from 1 to 5, with higher scores indicating less healthy conditions (where 1=0-25% damage; 2 = 25-50% damage; 3 = >50% damage; 4 = recent dead; 5 = >5 years dead).Health scores averaged 1.7 in healthy stands, compared to 2.3 in damaged stands.Saplings in damaged stands tended to be healthier with a score of 1.7, compared to 2.2 in healthy stands. Further, there was no difference in the proportion live or total numbers of saplings per hectare between healthy and damaged stands. The prevalence of damaging organisms, such as Cytospora canker (20% in damaged, 13% in healthy), wood-boring insects (27% in damaged, 10% in healthy), and aspen bark beetles (16% in damaged, 7% in healthy) was considerably greater among damaged stands. Site conditions also influenced the prevalence of some of these damage agents: bark beetles were most common among stands at low elevations (18%, compared to 11% and 6% at moderate iv and high elevations, respectively); Cytospora canker was most common among stands on south-or west-facing aspects (20% and 19%, respectively); both aspen bark beetles and Cytospora canker were also most common among stands in the southernmost section of the survey area, the Pike-San Isabel national forest (41% and 36%). There was no difference in the severity of canker or decay fungal infection between healthy and damaged stands. Cytospora canker infestations were more severe on the Medicine Bow NF compared to the other three national forests, and Marssonina foliar blight infection appeared to be most severe on slope summits, concave sites, and sites with either no to low percent slope or moderately steep sl...

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“…Fr. Daubenmire (1953) found that aspen leaf litter contained higher levels of nitrogen, phosphorus, potassium, and calcium in comparison with a variety pine and fir species.…”

Section: Soilsmentioning

confidence: 93%

Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: Extent, severity, and causal factors

Dudley

Burns

Jacobi

2015

Forest Ecology and Management

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“…Nevertheless, relatively high concentrations of calcium and low concentrations of nitrogen are nearly always present (see Gessel et al 1951, Tarrant et al 1951, Daubenmire 1953, Ovington 1956, Beaton et al 1965, Webber 1973. Phosphorus concentrations are usually low, but Smith et al (1968) found them to be higher in western redcedar than in Douglas-fir or western hemlock.…”

Section: Nutrients and Nutritionmentioning

confidence: 99%

Western redcedara literature review.

Minore¹

1983

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“…The organic horizons and upper 15 cm of mineral soil beneath western red cedar are characterized by higher pH, higher base saturation (attributable especially to Ca), and larger bacterial populations than the soil horizons beneath western hemlock [1,32]. The pH and Ca concentrations of litter and soil tend to be highest for western red cedar, lowest for western hemlock, and intermediate for Douglas fir [1,12]. High rates of nitrification have been observed beneath western red cedar, whereas it has been suggested that western hemlock actively inhibits nitrification [32,33].…”

mentioning

confidence: 99%

Dry matter and nitrogen allocation in western redcedar, western hemlock, and Douglas fir seedlings grown in low- and high-N soils

Hermann

Zaerr

1999

Ann. For. Sci.

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Nutrient Content of Leaf Litter of Trees in the Northern Rocky Mountains

Cited by 38 publications

References 9 publications

Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: Extent, severity, and causal factors

Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: Extent, severity, and causal factors

Western redcedara literature review.

Dry matter and nitrogen allocation in western redcedar, western hemlock, and Douglas fir seedlings grown in low- and high-N soils

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Nutrient Content of Leaf Litter of Trees in the Northern Rocky Mountains

Cited by 38 publications

References 9 publications

Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: Extent, severity, and causal factors

Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: Extent, severity, and causal factors

Western redcedar&#151;a literature review.

Dry matter and nitrogen allocation in western redcedar, western hemlock, and Douglas fir seedlings grown in low- and high-N soils

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Product

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Western redcedara literature review.