Physiographic features

This ecological site occurs on outwash terraces and stream terraces at elevations of 5,240 to 6,760 in feet. Slopes range from 2 to 30 percent. The site has a fluctuating water table, which may extend from 16 to 80 inches below the surface.

Table 2. Representative physiographic features

Climatic features

This ecological site receives most of its annual precipitation in the winter months in the form of snow. The mean annual precipitation ranges from 45 to 91 inches (1,143 to 2,311 mm) and the mean annual temperature ranges from 41 to 43 degrees F (5 to 6.1 degrees C). The frost free (>32F) season is 70 to 90 days. The freeze free (>28F) season is 85 to 200 days.

There are no representative climate stations for this site.

Table 3. Representative climatic features

Influencing water features

This ecological site is not influenced by wetland or riparian water features.

Soil features

This site is associated with the Aquic Haploxerands and the Humic Haploxerands, stream terrace soil components. The Aquic Haploxerands are moderately deep, somewhat poorly drained soils, which formed in glacial outwash from volcanic rocks. They have a gravelly medial sandy loam surface texture and gravelly fine sandy loam subsurface textures with about 5 percent cobbles. Redoximorphic features are present below 16 inches, indicating periods of water saturation. A root restrictive, silica-cemented duripan occurs at varying depths from 20 to 40 inches.

The Humic Haploxerands, stream terrace soils are very deep, moderately well and well drained soils, formed in ash-influenced alluvium from volcanic rocks. These soils are on stream terraces along Hot Springs Creek and the North Fork of Bailey Creek, where the stream gradients decrease and allow lateral deposition. They have a gravelly medial sandy loam surface texture. Percent rock fragments increase with depth. The subsurface textures, listed by increasing depth, are gravelly medial coarse sandy loam, extremely stony medial coarse sandy loam, extremely stony medial loamy coarse sand, and ashy stones. The lower horizons have 83-89 percent sub-rounded, stream deposited, rock fragments.

These soils have very low to low AWC (available water capacity) in the upper 60 inches of soil. Permeability is moderately rapid to rapid, but is slow to very slow through the duripan in Aquic Haploxerands soils.

This ecological site is associated with the following soil components within the Lassen Volcanic National Park Soil Survey Area (CA789):

Map Unit Component / Component %
125 Humic Haploxerands, stream terrace /55
164 Aquic Haploxerands /20
165 Humic Haploxerands, stream terrace / 5
166 Aquic Haploxerands /50

Table 4. Representative soil features

Animal community

Sierra lodgepole pine forests provide food, cover and habitat for a variety of species. These forests have high productivity in the understory with abundant forage for wildlife. They are often located adjacent to water bodies and open meadows, which increases the wildlife activity in these forests. Thirty-one mammals and almost fifty bird species have been documented to use Sierra lodgepole pine forests. Snags and downed logs are important for cavity-nesting birds, and mammals. Other animals forage on the Sierra lodgepole pine needles and consume the seeds (Cope, 1993).

White fir forests provide browse, cover and nesting sites for a variety of wildlife species. The type and quality of the wildlife habitat varies with the community type. Mature open forests, closed dense white fir forests, young forests and shrub lands provide different habitats and forage. Deer and bear can heavily browse young white fir shoots. Porcupines eat the bark of white fir and can kill saplings. Rodents feed on the cambial tissue. Young seedlings and seeds are eaten by animals as well. Douglas squirrels cut and cache white fir cones before the cones are fully mature.

There are about 33 species of mammals commonly present in the white fir forest type in California and, of these, 7 are generally associated with mature forests. About 123 species of birds are found in the white fir forest type of California and southern Oregon, about 50 of which are associated primarily with mature forests. Many of these birds use mature white fir trees and snags for foraging, roosting, nesting and/or breeding. Included are bald eagle, California spotted owl, brown creeper, pileated woodpecker, white-headed woodpecker and, when near lakes or streams, osprey. Reptiles in white fir forests are represented by 17 species, mostly at lower elevations, 8 of which are associated with mature forests (Zouhar, 2001).

Recreational uses

This area is suitable for hiking trails and wildlife viewing.

Wood products

Sierra lodgepole pine wood is used for framing, paneling, trim, posts, and other construction material. The forests are often uniform is size, which makes harvesting easier. The wood tends to be light and straight-grained, with consistent texture (Cope 1993).

White fir wood is used for framing, plywood and, sometimes, pulpwood. The heartwood of white fir decays rapidly if not properly preserved. White fir wood has a low specific gravity and heat production, hence it provides poor firewood compared to other conifers (Zouhar, 2001).

Jeffrey pine wood is used for lumber. No commercial distinction is made between ponderosa pine and Jeffrey pine lumber (Gucker, 2007).

Incense cedar wood is resistant to decay, making it very desirable for exterior use. This wood is used as mud sills, window sashes, sheathing under stucco or brick veneer construction, greenhouse benches, fencing, poles and trellises. It is also widely used for exterior and interior siding. Much of the top quality incense cedar is used in the manufacture of pencils (Habeck, 2008).

Other products

Jeffrey pine seeds are edible. Jeffrey pine sap was used by Native Americans to treat pulmonary disorders and, later, heptane was distilled from the sap and sold to treat pulmonary problems and tuberculosis. Jeffrey pine heptane was also used to develop the octane scale used to rate petroleum used in automobiles (Gucker, 2007).

Other information

Additional information on the common white fir pathogens:

White fir dwarf mistletoe (Arceuthobium abietinum f. sp. concoloris) is a parasitic plant common in the survey area as evident by witches brooms, top kill, stem cankers and swellings. The vegetative shoots of the dwarf mistletoe are often present from spring to fall. A fungus (Cytospora abietis) kills the branches that are infected with dwarf mistletoe. The reduced vigor makes the tree more susceptible to bark beetle and other diseases. The mistletoe cankers produce cracks in the bark that create entry points for other diseases such as heart rots (Burns and Honkala, 1990).

Fir broom rust (Melampsorella caryophyllacearum) is a disease that causes dense witches brooms with stunted yellow needles. The infected branch sheds its needles in fall, leaving a barren dead looking branch. The alternate host for this rust is the chickweeds (Stellaria spp. and Cerastium spp.). This disease can damage tree growth by reducing crown development. Mortality is less common in mature trees than in younger regeneration trees. Secondary infection is possible from heart rots entering through openings in the infected areas (Burns and Honkala, 1990).

Annosus root rot (Heterobasidion annosum) can affect large acres of fir forest. It spreads from infected roots to healthy roots. It slowly decays the roots, the root collar and the stem butt for many years, causing structural weaknesses and making the tree vulnerable to wind throw. Annosus root rot can also be spread aerially, infecting freshly cut stumps or other fresh tree wounds. Painting borax on the freshly cut stumps restricts the entry of the fungus. In all management activities it is important to reduce damage to the bark. The rot itself does not often kill white fir directly, but it weakens the tree and makes it easier for bark beetles (Scolytus spp.) to infest the tree (Burns and Honkala, 1990).

The fir engraver beetle (Scolytus ventralis) can cause extensive damage to white fir forests. Outbreaks can cause mortality to several acres of trees. It can reach epidemic levels when the trees are stressed due to drought, annosus root rot, dwarf mistletoe, or from fire damage.

Additional information on Jeffrey pine pathogens:

Infections from western dwarf mistletoe (Arceuthobium campylopodium) cause witches brooms, reduced growth and tree mortality. Sticky seeds are spread in fall and infest nearby and understory trees. In years of severe drought dwarf mistletoe has induced 60 to 80 percent of the Jeffery pine mortality (Burns and Honkala, 1990).

Jeffrey pine bark beetles (Dendroctonus jeffreyi) are native beetles that can only reproduce in Jeffrey pine. They are a natural cycle in maintaining forest health. They generally attack older weaker trees, but in times of drought or other disturbances such as lightning or fire, epidemic levels can break out and cause extensive damage to the forest. These beetles infest the lower stem and bole of the trees, usually after a pine engraver (Ips pini) infestation in the upper portion of the tree. The beetles slowly destroy the cambium, inhibiting the flow of nutrients. A sign of infestation is the changing color of the pine needles from green to yellow or reddish brown, beginning from the top down (Hagle et al., 2003; Smith, 1971).

Additional information about the mountain pine beetle, which can affect sugar pine, as well as other pines:

The mountain pine beetle (Dendroctonus ponderosae) creates pitch tubes on the bark at the point of entry. Boring dust is evident at the base of the tree. These beetles feed on the phloem layer in the inner bark of the tree, eventually girdling the tree. A blue stain fungus is inoculated into the tree by the beetles and reduces the flow of water. These beetles generally infest trees that are weakened by drought or other stresses and usually kill the tree. The engraver beetles (Ips spp.) are a secondary bark beetle, coming in after the mountain pine beetle. They eat the inner bark of the tree and inoculate the blue stain fungus as mentioned above, but the trees have a lower mortality rate. These beetles can be distinguished by their feeding patterns in the wood, and by the shape of the adults.

SITE INDEX DOCUMENTATION:

Alexander (1966) and Schumacher (1926) were used to determine forest site productivity for Sierra lodgepole pine and white fir, respectively. Low to High values of Site index and CMAI (culmination of mean annual increment) give an indication of the range of inherent productivity of this ecological site. Site index relates to height of dominant trees over a set period of time and CMAI relates to the average annual growth of wood fiber in the boles/trunks of trees. Site index and CMAI listed in the Forest Site Productivity section are in units of feet and cubic feet/acre/year, respectively. Both site index and CMAI are estimates; on-site investigation is recommended for specific forest management units for each soil classified to this ecological site. The historical and actual basal area of trees within a growing stand will greatly influence CMAI.

Conifer trees appropriate for site index measurement typically occur in community phase 1.4 and the older stands in community phases 1.2 and 1.3.

Table 9. Representative site productivity

Inventory data references

The following NRCS vegetation plots was used to describe this ecological site.

789347- type location

Type locality

Other references

Agee, James K.1994. The Lodgepole Pine Series in Fire and Weather Disturbances in Terrestrial Ecosystems of the Eastern Cascades. From volume III:Assessment. USDA, Forest Service, Pacific Northwest Research Station. Gen. Tech. Report.

Alexander, Robert R. 1966. Site indexes for Lodgepole pine, with corrections for stand density: instructions for field use. USDA, Forest Service. Rocky Mountain Forest and Range Experiment Station Research Paper RM-24. NASIS ID 520

Amman, Gene D., McGregor, Mark D., Dolph Robert E. 1990. Mountain Pine Beetle: Forest Insect and Disease Leaflet 2. USDA, Forest Service, Pacific Northwest Region, Portland OR.

Beaty, Matthew and Taylor, Alan H. (2001). Spatial and Temporal Variation of Fire Regimes in a Mixed Conifer Forest Landscape, Southern Cascades, California, USA. Journal of Biogeography, 28, 955-966.

Bekker, Mathew F. and Taylor, Alan H. (2001). Gradient Analysis of Fire Regimes in Montane Forest of the Southern Cascade Range, Thousand Lakes Wilderness, California, USA. Plant Ecology 155: 15-23.

Burns, Russell M., and Barbara H. Honkala, tech. coords. 1990. Silvics of North America: 1. Conifers; 2. Hardwoods. Agriculture Handbook 654. U.S. Department of Agriculture, Forest Service, Washington, DC. vol.2, 877 p.

Carroll, Allan L.; Taylor, Steve W.; Régnière, Jacques; and Safranyik, Les. 2003. Effects of Climate Change on Range Expansion by the Mountain Pine Beetle in British Columbia. Mountain Pine Beetle Symposium: Challenges and Solutions. October 30-31, 2003, Kelowna, British Columbia. T.L. Shore, J.E. Brooks, and J.E. Stone (editors). Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Information Report BC-X-399, Victoria, BC. 298 p.

Cope, Amy, B. 1993. Pinus contorta var. murrayana. In: fire Effects Information Systems, U.S. department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Science Laboratory (Producer). http://www.fs.fed.us/database/feis/

Laacke, Robert J. (1990). Abies concolor (Gord. & Glend) Lindl. Ex Hildebr. White Fir. In. Burns, Russell M; Honkala, Barbara H.; [Technical coordinators] 1990. Silvics of North America: Volume 1. Conifers. United States Department of Agriculture (USDA), Forest Service, Agriculture Handbook 54.

Lotan, James, E. and Critchfield, William B., 1990. Pinus contorta: Lodgepole Pine In: Burns, Russel M., Honkala, Barbara H. eds. Silvics of North America, Vol 1. Conifers.
Parker, Albert J., 1995. Comparative Gradient Structure and Forest Cover Types in Lassen Volcanic and Yosemite National Parks, California. Bulletin of the Torrey Botanical Club, Vol. 122, No. 1. (Jan. - Mar., 1995), pp. 58-68.

Meyer, Walter H. 1961. Yield of even-aged stands of ponderosa pine. USDA Technical Bulletin 630. (revised 1961). NASIS ID 600

Millar, Constance I.; Westfall, Robert D.; Delany, Diane L.; King, John C.; and Graumlich, Lisa J., 2004. Response of Subalpine Conifers in the Sierra Nevada , California, U.S.A., to 20th Century Warming and Decadal Climate Variability. Arctic, Antarctic, and Alpine Research, Vol. 36, No. 2, 2004, pp. 181–200.

Parker, Albert J., 1991. Forest/Environment Relationships in Lassen Volcanic National Park, California, U.S.A. Journal of Biogeography, Vol. 18, No. 5. (Sep., 1991), pp. 543-552.

Potter, Donald; Smith, Mark; Beck, Tom; Kermeen, Brian; Hance, Wayne; and Robertson, Steve; 1992. Ecological Characteristics of Old Growth Lodgepole Pine in California. USDA, Forest Service.

Potter, Donald A. (1998). Forested Communities of the Upper Montane in the Central and Southern Sierra Nevada. U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, General Technical Report PSW-GTR-169.

Royce, E. B. and Barbour, M. G., 2001.Mediterranean Climate Effects. I. Conifer Water Use Across a Sierra Nevada Ecotone. American Journal of Botany 88(5): 911–918. 2001.

Royce, E. B. and Barbour, M. G., 2001. Mediterranean Climate Effects. II. Conifer Growth Phenology Across a Sierra Nevada Ecotone. American Journal of Botany 88(5): 919–932. 2001.

Schumacher, Francis X. 1926.Yield, stand, and volume tables for white fir in the California pine region. University of California Agricultural Experiment Station Bulletin 407. NASIS ID 030

Taylor, Alan. H., 1990. Tree Invasion in Meadows of Lassen Volcanic National Park, California. Professional Geographer, 42(4), 1990, pp. 457- 470.

Taylor, Alan. H., 2000. Fire Regimes and Forest Changes in Mid and Upper Montane Forest of the Southern Cascades, Lassen Volcanic National Park, California, U.S.A. Journal of Biogeography, 27, 87-104.

Taylor, Alan H. and Halpern, Charles B., 1991. The structure and dynamics of Abies magnifica forests in the southern Cascade Range, USA. Journal of Vegetation Science. 2(2): 189-200. [15768]

Taylor, Alan H. and Solem, Michael N., 2001. Fire Regimes and Stand Dynamics in an Upper Montane Forest Landscape in the Southern Cascades, Caribou Wilderness, California. Journal of the Torrey Botanical Society, Vol. 128, No. 4. (Oct. - Dec., 2001), pp. 350-361.

Zouhar, Kris (2001). Abies concolor. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/ [ 2008, March 5].

Contributors

Lyn Townsend
Marchel M. Munnecke