Abstract
Patterns of survival and stem-volume growth for planted seedlings of ponderosa pine (Pinus ponderosa Dougl. ex Laws.) competing with various levels of woody and herbaceous vegetation were derived from three previous studies—one in Oregon and two in Montana. Negative hyperbolic curves of opposite concavity describe the relation between the abundance of woody or herbaceous vegetation and (1) the survival and (2) the stem volume of the pine seedlings. From these curves, two types of competition thresholds for managing forest vegetation are identified: (1) maximum-response threshold—a level of vegetation abundance where additional control measures will not yield an appreciable increase in tree performance; and (2) minimum-response threshold—a level of vegetation abundance that must be reached before additional control measures will yield an appreciable increase in tree performance. The maximum- and minimum-response thresholds for pine stem volume occurred at lower levels of vegetation abundance than those for pine survival. Thus, forest managers may need to consider ponderosa pine survival and stemvolume growth as separate objectives when managing woody and herbaceous vegetation in young plantations. Knowledge of maximum- and minimum-response thresholds also can be used to improve herbicide prescriptions.
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References
Atkinson, W.A. 1986. Zeroing in on zoned management. J. Forestry 84 (1): 27–28.
Auld, B.A. and Tisdell, C.A. 1986. Economic threshold/critical density models in weed control. pp. 261–168. In: Eur. Weed Res. Soc. Symp. 1986, Econ. Weed Control.
Barrett, J.W. 1982. Twenty-year growth of ponderosa pine saplings thinned to five spacings in central Oregon. USDA Forest Serv., Pacific NW Forest and Range Exp. Sta., Portland, Oregon. Res. Pap. PNW-301. 18 p.
Bhowmik, P.C. and Reddy, K.N. 1988. Effects of barnyardgrass (Echinochloa crus-galli) on growth, yield, and nutrient status of transplanted tomato (Lycopersicon esculentum). Weed Sci. 36: 775–778.
Brand, D.G. 1986. A competition index for predicting the vigour of planted Douglas-fir in southwestern British Columbia. Can. J. Forest Res. 16: 23–29.
Bridges, D.C. and Chandler, J.M. 1987. Influence of Johnsongrass (Sorghum halepense) density and period of competition on cotton yield. Weed Sci. 35: 63–67.
Brodie, J.D. and Tedder, P.L. 1982. Regeneration delay: Economic cost and harvest loss. J. Forestry 80 (1): 26–28.
Burkhart, H.E. and Sprinz, P.T. 1984. A model for assessing hardwood competition effects on yields of loblolly pine plantations. School of Forestry and Wildlife Resources, Virginia Polytech. Inst. and State Univ., Blacksburg. Publ. FWS-3–84. 55 p.
Chambers, J.L., Hinckley, T.M., Cox, G.S., Metcalf, C.L. and Aslin, R.G. 1985. Boundary-line analysis and models of leaf conductance for four oak-hickory forest species. Forest Sci. 31: 437–450.
Chan, S.S. and Walstad, J.D. 1987. Correlations between overtopping vegetation and development of Douglas-fir saplings in the Oregon Coast Range. West. J. Appl. Forestry 2: 117–119.
Cousens, R.D. 1987. Theory and reality of weed control thresholds. Plant Protect. Quart. 2 (1): 13–20.
Cussans, G.W., Cousens, R.D. and Wilson, B.J. 1986. Thresholds for weed control—the concepts and their interpretation. pp. 253–260. In: Eur. Weed Res. Soc. Symp. 1986, Econ. Weed Control.
Drew, T.J. and Flewelling, J.W. 1977. Some recent Japanese theories of yield-density relationships and their application to Monterey pine. Forest Sci. 23: 517–534.
Drew, T.J. and Flewelling, J.W. 1979. Stand density management: An alternative approach and its application to Douglas-fir plantations. Forest Sci. 25 (3): 518–532.
Duncan, S.H., and Steinbrenner, E.C. 1975. Soil survey of the Klamath Tree Farm. Weyerhaeuser Co., Tacoma, Washington.
Elliott, K.J. and White, A.S. 1987. Competitive effects of various grasses and forbs on ponderosa pine seedlings. Forest Sci. 33: 356–366.
Firbank, L.G. and Watkinson, A.R. 1987. On the analysis of competition at the level of the individual plant. Oecologia 71: 308–317.
Franklin, J.F. and Dyrness, C.T. 1973. Natural vegetation of Oregon and Washington. USDA For. Serv., Pacific NW Forest and Range Exp. Sta., Portland, Oregon. Gen. Tech. Rep. PNW-8. 417 p.
Harper, J.L. 1977. Population Biology of Plants. Academic Press, London. 829 p.
Lanini, W.T. and Radosevich, S.R. 1986. Response of three conifer species to site preparation and shrub control. Forest Sci. 32: 61–77.
Lanner, R.M. 1985. On the insensitivity of height growth to spacing. Forest Ecol. Manage. 13: 143–148.
Larson, M.M. and Schubert, G.W. 1969. Root competition between ponderosa pine seedlings and grass. USDA For. Serv., Rocky Mt. Forest and Range Exp. Sta., Missoula, MT. Res. Pap. RM-54. 12 p.
Lewis, R.A. 1981. Silvicultural strategies and weed populations in western conifers. pp. 62–71. In: Holt, H.A. and Fischer, B.C. (Eds) Weed Control in Forest Management, Proc. John S. Wright Forestry Conference. Dept. of Forestry and Natural Resources, Purdue Univ., West Lafayette, Indiana.
Liddle, M.J., Budd, C.S.J., and Hutchings, M.J. 1982. Population dynamics and neighborhood effects in establishing swards of Festuca rubia. Oikos 38: 52–59.
Matthews, G.A. 1984. Pest Management. Longman Inc., New York. 231 p.
McCarter, J.B. and Long, J.N. 1986. A lodgepole pine density management diagram. West. J. Appl. Forestry 1: 6–11.
Mueller-Dombois, D. and Ellenberg, H. 1974. Aims and Methods of Vegetation Ecology. John Wiley and Sons, Inc., New York. 547 p.
Norgaard, R.B. 1976. Integrating economics and pest management. pp. 17–27. In: Apple, J.L. and Smith, R.F. (Eds) Integrated Pest Management. Plenum Press, New York.
Oliver, W.W. 1984. Brush reduces growth of thinned ponderosa pine in northern California. USDA For. Serv., Pacific NW Forest and Range Exp. Sta., Portland, Oregon. Res. Pap. PSW-172. 7 p.
Petersen, T.D. 1988. Effects of interference from Calamagrostis rubescens on size distributions in stands of Pinus ponderosa. J. Appl. Ecol. 25: 265–272.
Petersen, T.D. and Maxwell, B.D. 1987. Water stress of Pinus ponderosa in relation to foliage density of neighboring plants. Can. J. Forest Res. 17: 1620–1622.
Powers, R.F. and Oliver, W.W. 1985. Ponderosa pine plantation growth in northern California: Brush competition and response to release. pp. 122–125. In: Proc. Western Forestry Conf., Portland, Oregon.
Radosevich, S.R. 1987. Methods to study interactions among crops and weeds. Weed Tech. 1 (3): 190–198.
Radosevich, S.R. and Holt, J.S. 1984. Ecology of Weeds. John Wiley and Sons, Inc., New York. 265 p.
Radosevich, S.R. and Osteryoung, K. 1987. Principles governing plant-environment interactions. pp. 105–156 In: Walstad, J.D. and Kuch, P.J. (Eds) Forest Vegetation Management for Conifer Production. John Wiley and Sons, Inc., New York.
Reineke, L.H. 1933. Perfecting a stand density index for evenaged forests. J. Agric. Res. 46: 627–628.
Ritchie, M.W. and Powers, R.F. 1987. Modeling height growth of ponderosa pine plantations: Influence of weed competition and crown ratio. pp. 79–91. In: Proc. 9th Ann. For. Veg. Mgt. Conf., Redding, CA.
Ross, D.W., Scott, W., Heninger, R.L., and Walstad, J.D. 1986. Effects of site preparation on ponderosa pine (Pinus ponderosa), associated vegetation, and soil properties in south central Oregon. Can. J. Forest Res. 16: 612–618.
Ross, D.W. and Walstad, J.D. 1986a. Estimating aboveground biomass of shrubs and young ponderosa and lodgepole pines in southcentral Oregon. Forest Res. Lab., Oregon State Univ., Corvallis. Res. Bull. 57. 12 p.
Ross, D.W. and Walstad, J.D. 1986b. Vegetative competition, site-preparation, and pine performance: a literature review with reference to southcentral Oregon. Forest Res. Lab., Oregon State Univ., Corvallis. Res. Bull. 58. 21 p.
Shainsky, L.J. and Radosevich, S.R. 1986. Growth and water relations of Pinus ponderosa seedling in competitive regimes with Arctostaphylos patula seedlings. J. Appl. Ecol. 23: 957–966.
Shinozaki, K. and Kira, T. 1956. Intraspecific competition among higher plants. VII. Logistic theory of the C-D effect. J. Inst. Polytech. Osaka City Univ. D7: 35–72.
Stern, V.M., Smith, R.E., van denBosch, R. and Hagen, K.S. 1959. The integrated control concept. Hilgardia 29 (2): 81–101.
Stewart, R.E. 1987. Seeing the forest for the weeds: a synthesis of forest vegetation management. pp. 431–480. In: Walstad, J.D. and Kuch, P.J. (Eds) Forest Vegetation Management for Conifer Production. John Wiley and Sons, Inc., New York.
Stewart, R.E., Gross, L.L., and Honkala, B.H. 1984. Effects of competing vegetation on forest trees: A bibliography with abstracts. USDA For. Serv. Gen. Tech. Rep. WO-43. Washington, D.C. 260 p.
Straka, T.J. and Hotvedt, J.E. 1985. Economic aspects of the forest regeneration delay decision. South. J. Appl. Forestry 9 (2): 91–94.
Tappeiner, J.C.II and Radosevich, S.R. 1982. Effect of bearmat (Chamaebatia folisa) on soil moisture and ponderosa pine (Pinus ponderosa) growth. Weed Sci. 30: 98–101.
Tappeiner, J.C.II and Wagner, R.G. 1987. Principles of silvicultural prescriptions for vegetation management. pp. 399–429. In: Walstad, J.D. and Kuch, P.J. (Eds) Forest Vegetation Management for Conifer Production. John Wiley and Sons, Inc., New York.
Thomas, G.D., Smith, D.B. and Ignoffo, C.M. 1979. Economic thresholds for insect control. pp. 419–429. In: EnnisJr., W.B. (Ed) Introduction to Crop Protection. The American Society of Agronomy, Inc. and The Crop Science Society of American, Madison, Wisconsin.
Underwood, T. 1986. The analysis of competition by field experiments. pp. 240–268. In: Kikkawa, J. and Anderson, D.J. (Eds) Community Ecology: Pattern and Process. Blackwell Scientific Publications, Melbourne.
Wagner, R.G. and Radosevich, S.R. 1987. Interspecific competition indices for vegetation management decisions in young Douglas-fir stands on the Siuslaw National Forest: Report # 1. Dept. of Forest Science, College of Forestry, Oregon State Univ., Corvallis. 108 p.
Waller, D.M. 1981. Neighborhood competition in several violet populations. Oecologia 51: 116–122.
Walstad, J.D. 1976. Weed control for better southern pine management. Southern Forestry Research Center, Weyerhaeuser Company, Hot Springs, Arkansas. Forestry Paper 15. 44 p.
Walstad, J.D. and Kuch, P.J. 1987. Introduction to forest vegetation management. pp. 3–14. In: Walstad, J.D. and Kuch, P.J. (Eds) Forest Vegetation Management for Conifer Production. John Wiley and Sons, Inc., New York.
Webb, R.A. 1972. Use of the boundary line in the analysis of biological data. J. Hort. Sci. 47: 309–319.
White, D.E. 1988. Competitive interactions between Douglas-fir or ponderosa pine and whiteleaf manzanita. Ph.D. thesis, Oregon State Univ., Corvallis. 138 p.
Yates, W.E. and Aston, F.M. 1960. Logarithmic dosage sprayer. Agric. Eng. 41: 436–442.
Zutter, B.R., Glover, G.R., and Gjerstad, D.H. 1986. Effects of herbaceous weed control using herbicides in a young loblolly pine plantation. Forest Sci. 32: 882–899.
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Wagner, R.G., Petersen, T.D., Ross, D.W. et al. Competition thresholds for the survival and growth of ponderosa pine seedlings associated with woody and herbaceous vegetation. New Forest 3, 151–170 (1989). https://doi.org/10.1007/BF00021579
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DOI: https://doi.org/10.1007/BF00021579