On the formation of dense understory layers in forests worldwide: Consequences and implications for forest dynamics, biodiversity, and succession

Canadian Journal of Forest Research

Volumn 36, Issue 6, 2006, Pages 1345-1362

  Royo, Alejandro A ^a,b   Carson, Walter P ^a  

^a UNIVERSITY OF PITTSBURGH   (United States)

^b USDA FOREST SERVICE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BIODIVERSITY; COMPUTER SIMULATION; UNDERPINNINGS;

FOREST SUCCESSION; OVERSTORY DISTURBANCE; TREE REGENERATION; UNDERSTORY CANOPIES;

FORESTRY;

ALLELOPATHY; BIODIVERSITY; FOREST DYNAMICS; PARADIGM SHIFT; REGENERATION; SHADE TOLERANCE; SUCCESSION; THEORETICAL STUDY; UNDERSTORY;

FOREST CANOPY; FORESTRY; REFORESTATION;

EID: 33748549370     PISSN: 00455067     EISSN: None     Source Type: Journal    
DOI: 10.1139/X06-025     Document Type: Review

References (231)

1. Abe, M., Izaki, J., Miguchi, H., Masaki, T., Makita, A., and Nakashizuka, T. 2002. The effects of Sasa and canopy gap formation on tree regeneration in an old beech forest. J. Veg. Sci. 13: 565-574.
2. Abrams, M.D. 1992. Pire and the development of oak forests. Bioscience, 42: 335-364.
3. Allen, R.B., Payton, I.J., and Knowlton, J.E. 1984. Effects of ungulates on structure and species composition in the Urewara forests as shown by exclosures. N.Z. J. Ecol. 7: 119-130.
4. Anderson, J.P., Jr., and Egler, R.E. 1988. Patch studies in the stability of non-diversity: Dennstaedtia, Solidago, Spiraea, Kalmia. Phytologia, 64: 349-364.
5. Antos, J.A., Parish, R., and Conley, K. 2000. Age structure and growth of the tree seedling bank in subalpine spruce-fir forests of south-central British Columbia. Am. Midl. Nat. 143: 342-354.
6. Attiwill, P.M. 1994. The disturbance of forest ecosystems: the ecological basis for conservative management. For. Ecol. Manage. 63: 247-300.
7. Attiwill, P.M., and Adams, M.A. 1993. Tansley Review 50. Nutrient cycling in forests. New Phytol. 124: 561-582.
8. Aubin, I., Beaudet, M., and Messier, C. 2000. Light extinction coefficients specific to the understory vegetation of the southern boreal forest, Quebec. Can. J. For. Res. 30: 168-177.
9. Banta, J.A., Royo, A.A., Kirschbaum, C., and Carson, W.P. 2005. Boulders in the Allegheny National Forest: evidence for boulders as refugia from deer and as a bioassay of overbrowsing. Nat. Areas J. 25: 10-18.
10. Batzer, H.O., and Popp, M.P. 1985. Forest succession following a spruce budworm outbreak in Minnesota. For. Chron. 61: 807-814.
11. Beaudet, M., Messier, C., and Canham, C. 2002. Predictions of understory light conditions in northern hardwood forests following parameterization, sensitivity analysis, and test of the SOR-TIE light model. For. Ecol. Manage. 165: 235-248.
12. Beaudet, M., Messier, C., and Leduc, A. 2004. Understory light profiles in temperate deciduous forests: recovery process following selection cutting. J. Ecol. 92: 328-338.
13. Beckage, B., and Clark, J.S. 2003. Seedling survival and growth of three forest tree species: the role of spatial heterogeneity. Ecology, 84: 1849-1861.
14. Beckage, B., Clark, J.S., Clinton, B.D., and Haines, B.L. 2000. A long-term study of tree seedling recruitment in southern Appalachian forests: the effects of canopy gaps and shrub understories. Can. J. For. Res. 30: 1617-1631.
15. Bergquist, J., Örlander, G., and Nilsson, U. 1999. Deer browsing and slash removal affect field vegetation on south Swedish clearcuts. For. Ecol. Manage. 114: 171-182.
16. Berkowitz, A.R., Canham, C.D., and Kelly, V.R. 1995. Competition vs. facilitation of tree seedling growth and survival in early successional communities. Ecology, 76: 1156-1168.
17. Biring, B.S., Comeau, P.G., and Fielder, P.L. 2003. Long-term effects of vegetation control treatments for release of Engelmann spruce from a mixed-shrub community in southern British Columbia. Ann. For. Sci. 60: 681-690.
18. Brach, A.R., McNaughton, S.J., and Raynal, D.J. 1993. Photosynthetic adaptability of two fern species of a northern hardwood forest. Am. Fern J. 83: 47-53.
19. Bradley, R.L., Titus, B.D., and Fyles, J.W. 1997. Nitrogen acquisition and competitive ability of Kalmia angustifolia L., paper birch (Betula papyrifera Marsh.) and black spruce (Picea mariana (Mill.) B.S.P.) seedlings grown on different humus forms. Plant Soil, 195: 209-220.
20. Bray, J.R. 1956. Gap phase replacement in a maple-basswood forest. Ecology, 37: 598-600.
21. Brown, J.H., and Heske, E.J. 1990. Control of a desert-grassland transition by a keystone rodent guild. Science (Washington, D.C.), 250: 1705-1707.
22. Brokaw, N.V.L. 1983. Groundlayer dominance and apparent inhibition of tree regeneration by Aechmea magdalenae (Bromeliaceae) in a tropical forest. Trop. Ecol. 24: 194-200.
23. Campbell, T.E. 1981. Effects of endrin in repellent seed coverings on caged rodents. USDA For. Serv. Res. Pap. SO-174.
24. Bunnell, F.L. 1990. Reproduction of salal (Gaultheria shallon Pursh.) under forest canopy. Can. J. For. Res. 20: 91-100.
25. Canham, C.D. 1989. Different responses to gaps among shade-tolerant tree species. Ecology, 70: 548-550.
26. Canham, C.D., Finzi, A.C., Pacala, S.W., and Burbank, D.H. 1994. Causes and consequences of resource heterogeneity in forests: interspecific variation in light transmission by canopy trees. Can. J. For. Res. 24: 37-349.
27. Carson, W.P., Cronin, J.P., and Long, Z.T. 2004. A general rule for predicting when insects will have strong top-down effects on plant communities: on the relationship between insect outbreaks and host concentration. In insects and ecosystem function. Edited by W.W. Weisser and E. Siemann. Ecol. Stud. Ser. 413. pp. 193-211.
28. Casper, B.B., and Jackson, R.B. 1997. Plant competition underground. Annu. Rev. Ecol. Syst. 28: 545-570.
29. Cater, T.C., and Chapin III, F.S. 2000. Differential effects of competition or microenvironment on boreal tree seedling establishment after fire. Ecology, 81: 1086-1099
30. 15N in a Coastal British Columbia plantation forest: 6-year results. Can. J. For. Res. 30: 1379-1388.
31. 15N on a western red cedar - western hemlock cutover site on northern Vancouver Island. Can. J. For. Res. 26: 313-321.
32. Chang, S.X., Weetman, G.F., and Preston, C.M. 1996b. Understory competition effect on tree growth and biomass allocation on a coastal old-growth forest cutover site in British Columbia. For. Ecol. Manage. 83: 1-11.
33. Christy, E.J. 1986. Effect of root competition and shading on growth of suppressed western hemlock (Tsuga heterophylla). Vegetatio, 65: 21-28.
34. Clark, D.B, and Clark, D.A. 1991. The impact of physical damage on canopy tree regeneration in tropical rain forest. J. Ecol. 79: 447-457.
35. Clinton, B.D., and Vose, J.M. 1996. Effects of Rhododendron maximum L. on Acer rubrum L. seedling establishment. Castanea, 6: 38-45.
36. Clinton, B.D., Boring, L.R., and Swank, W.T. 1994. Regeneration patterns in canopy gaps of mixed-oak forests of the Southern Appalachians: influences of topographic position and evergreen understory. Am. Midl. Nat. 132: 308-319.
37. Cody, W.J., Hall, I.V., and Crompton. C.W. 1977. The biology of Canadian weeds. Part 26: Dennstaedtia punctilobula. Can. J. Plant Sci. 57: 1159-1168.
38. Collins, R.J., and Carson, W.P. 2003. The fire and oak hypothesis: incorporating the effects of deer browsing and canopy gaps. In Proceedings of the 13th Central Hardwood Forest Conference, Urbana-Champaign, Ill., 1-3 April 2002. Edited by J.W. Van Sambeek, J.O Dawson, F. Ponder, Jr., E.F. Loewenstein, and J.S. Fralish. USDA For. Serv. Gen. Tech. Rep. NC-234. pp. 44-63.
39. Connell, J.H. 1990. Apparent vs. "real" competition in plants. In Perspectives on plant competition. Edited by J.B. Grace and D. Tilman. Academic Press, San Diego, Calif. pp. 9-25.
40. Connell, J.H., and Sousa, W.P. 1983. On the evidence needed to judge ecological stability or persistence. Am. Nat. 121: 789-824.
41. Coomes, D.A., and Grubb, P.J. 2000. Impacts of root competition in forests and woodlands: a theoretical framework and review of experiments. Ecol. Monogr. 70: 171-207.
42. Coomes, D.A., Allen, R.B., Forsyth, D.M., and Lee. W.G. 2003. Factors preventing the recovery of New Zealand forests following control of invasive deer. Conserv. Biol. 17: 450-459.
43. Cunningham, A. 1979. A century of change in the forests of the Ruahine Range, North Island, New Zealand: 1870-1970. N.Z. J. Ecol. 2: 11-21.
44. Davies, R.J. 1985. The importance of weed control and the use of tree shelters for establishing broadleaved trees on grass-dominated sites in England. Forestry, 58: 167-180.
45. de la Cretaz, A.L., and Kelty, M.J. 1999. Establishment and control of hay-scented fern: a native invasive species. Biol. Invasions. 1: 223-236.
46. de la Cretaz, A.L., and Kelty, M.J. 2002. Development of tree regeneration in fern-dominated forest understories after reduction of deer browsing. Restor. Ecol. 10: 416-426.
47. Den Ouden, J. 2000. The role of bracken (Pteridium aquilinum) in forest dynamics, Ph.D. thesis, Wageningen University, Wageningen, Netherlands.
48. Denslow, J.S. 1987. Tropical rainforest gaps and tree species diversity. Annu. Rev. Ecol. Syst. 18: 431-452.
49. Denslow, S.J., Newell, E., and Ellison, A.M. 1991. The effect of understory palms and cyclanths on the growth and survival of inga seedlings. Biotropica, 23: 225-234.
50. Dillenburg, L.R., Whigham, D.F., Teramura, A.H., and Forseth, I.N. 1993. Effects of vine competition on availability of light, water, and nitrogen to a tree host (Liquidambar styraciflua). Am. J. Bot. 80: 244-252.
51. Dolling, A. 1996. Interference of bracken (Pteridium aquilinum L. Kuhn) with Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies L. Karst.) seedling establishment. For. Ecol. Manage. 88: 227-235.
52. Dolling, A. 1999. The vegetative spread of Pteridium aquilinum in a hemiboreal forest: invasion or revegetation? For. Ecol. Manage. 124: 177-184.
53. Dolling, A., Zackrisson, O., and Nilsson, M.C. 1994. Seasonal variation in the phytotoxicity of bracken (Pteridium aquilinum L. Kuhn). J. Chem. Ecol. 20: 3163-3172.
54. Donlan, B.J., and Parker, G.R. 2004. Understory response to disturbance: an investigation of prescribed burning and understory removal treatments. In Proceedings: Upland Oak Ecology Symposium: History, Current Conditions, and Sustainability, Fayetteville, Ark., 7-10 October 2002. Edited by M. Spetich. USDA For Serv. Gen. Tech Rep. SRS-73. pp. 285-291.
55. Drew, A.P. 1988. Interference of black cherry by ground flora of the Allegheny uplands. Can. J. For. Res. 18: 652-656.
56. Ehrenfeld, J.G. 1980. Understory response to canopy gaps of varying size in a mature oak forest. Bull. Torrey Bot. Club, 107: 29-41.
57. English, B., and Hackett, R. 1994. The impact of Kalmia on plantation performance in central Newfoundland. Newfoudland Forest Service, St-John's, N.L. Silvic. Notebook Ser. Vol. 2.
58. Facelli, J.M., and Pickett, S.T.A. 1991. Plant litter: its dynamics and effects on plant community structure. Bot. Rev. 57: 1-32.
59. Farris-Lopez, K., Denslow, J.S., Moser, B., and Passmore, H. 2004. Influence of a common palm, Oenocarpus mapora, on seedling establishment in a tropical moist forest in Panama. J. Trop. Ecol. 20: 429-438.
60. Ferguson, D.E., and Adams, D.L. 1994. Effects of pocket gophers, bracken fern, and western coneflower on survival and growth of planted conifers. Northwest Sci. 68: 241-249.
61. Finegan, B. 1996. Pattern and process in neotropical secondary rain forests: the first 100 years of succession. Trends Ecol. Evol. 11: 119-124.
62. Finzi, A.C., and Canham, C.D. 2000. Sapling growth in response to light and nitrogen availability in a southern New England forest. For. Ecol. Manage. 131: 153-165.
63. Frak, E., and Ponge, J.F. 2002. The influence of altitude on the distribution of subterranean organs and humus components in Vaccinium myrtillus carpets. J. Veg. Sci. 13: 17-26.
64. Franklin, J.F., and Pechanec, A.A. 1967. Comparison of vegetation in adjacent alder, conifer, and mixed alder-conifer communities. In Biology of Alder: Proceedings of a Symposium Held at Northwest Scientific Association 40th Annual Meeting, 14-15 April 1967, Pullman, Wash. Edited by J. Trappe, J. Franklin, R.F. Tarrant, and G.M. Hansen. USDA Forest Service, Pacific Northwest Research Station, Portland, Ore. pp. 37-43.
65. Frelich, L.E. 2002. Disturbance regimes and forest dynamics. Cambridge University Press. Cambridge, UK.
66. Frelich, L.E., and Lorimer, C.G. 1985. Current and predicted longterm effects of deer browsing in hemlock forests in Michigan, USA. Biol. Conserv. 34: 99-120.
67. Fuerst, E.P., and Putnam, A.R. 1983. Separating the competitive and allelopathic components of interference: theoretical principles. J. Chem. Ecol. 20: 1355-1380.
68. George, L.O., and Bazzaz, F.A. 1999a. The fern understory as an ecological filter: emergence and establishment of canopy-tree seedlings. Ecology, 80: 833-845.
69. George, L.O., and Bazzaz, F.A. 1999b. The fern understory as an ecological filter: growth and survival of canopy-tree seedlings. Ecology, 80: 846-856.
70. Gerwing, J.J. 2001. Testing liana cutting and controlled burning as silvicultural treatments for a logged forest in the eastern Amazon. J. Appl. Ecol. 38: 1264-1276.
71. Ghent, A.W., Fraser, D.A., and Thomas, J.B. 1957. Evidence of trends in forest succession during the first decade following budworm devastation. For. Sci. 2: 184-208.
72. Gillman, L.N., Wright, S.D., and Ogden, J. 2003. Response of forest tree seedlings to simulated litterfall damage. Plant Ecol. 169: 53-60.
73. Givnish, T.J. 2002. On the adaptive significance of evergreen vs. deciduous leaves: solving the triple paradox. Silva Fenn. 36: 703-743.
74. Gliessman, S.R. 1978. The establishment of bracken following fire in tropical habitats. Am. Fern J. 68: 41-44.
75. Gliessman, S.R., and Muller, C.H. 1972. The phytotoxic potential of bracken, Pteridium aquilinum (L.) Kuhn. Madrono, 21: 299-304.
76. Gliessman, S.R., and Muller, C.H. 1978. The allelopathic mechanisms of dominance in bracken (Pteridium aquilinum) in southern California. J. Chem. Ecol. 4: 337-362.
77. Godley, E.J., and Smith, D.H. 1981. Breeding systems in New Zealand Pseudowintera colorata (Winteraceae). N.Z. J. Bot. 19: 151-156.
78. Gonzalez, M.E., Veblen, T.T., Donoso, C., and Valeria, L. 2002. Tree regeneration responses in a lowland Nothofagus-dominated forest after bamboo dieback in south-central Chile. Plant Ecol. 161: 59-73.
79. Gratzer, G., Raj, P.B., and Glatzel, G. 1999. The influence of the bamboo Yushania microphylla on the regeneration of Abies densa in central Bhutan. Can. J. For. Res. 29: 1518-1527.
80. Grauel, W.T., and Putz, F.E. 2004. Effects of lianas on growth and regeneration of Prioria copaifera in Darien, Panama. For. Ecol. Manage. 190: 99-108.
81. Greene, D.F., Zasada, J.C., Sirois, L., Kneeshaw, D.D., Morin, H., Charron, L., and Simard, M.J. 1999. A review of the regeneration dynamics of North American boreal forest tree species. Can. J. For. Res. 29: 824-839.
82. Griscom, B.W., and Ashton, P.M.S. 2003. Bamboo control of forest succession: Guadua sarcocarpa in Southeastern Peru. For. Ecol. Manage. 175: 445-454.
83. Guariguata, M.R. 1990. Landslide disturbance and forest regeneration in the Upper Luquillo mountains of Puerto Rico. J. Ecol. 78: 814-832.
84. Guariguata, M.R. 1998. Response of forest tree saplings to experimental damage in lowland Panama. For. Ecol. Manage. 102: 103-111.
85. Hall, I.V., Jackson, L.P., and Everett, C.F. 1973. The biology of Canadian weeds. 1. Kalmia angustifolia L. Can. J. Plant Sci. 53: 865-873.
86. Hartshorn, G.S. 1978. Tree falls and tropical forest dynamics. In tropical trees as living systems. Edited by P.B. Tomlinson and M.H. Zimmermann. Cambridge University Press. London. pp. 617-638.
87. Haywood, J.D., Goelz, J.C., Sword-Sayer, M.A., and Tiarks, A.E. 2003. Influence of fertilization, weed control, and pine litter on loblolly pine growth and productivity and understory plant development through twelve growing seasons. Can. J. For. Res. 33: 1974-1982.
88. Hill, J.D. 1996. Population dynamics of hay-scented fern (Dennstaedtia punctilobula) and its impact on forest composition, structure, and dynamics. University of Connecticut, Storrs, Conn.
89. Hill, J.D., and Silander, J.A., Jr. 2001. Distribution and dynamics of two ferns: Dennstaedtia punctilobula (Dennstaedtiaceae) and Thelypteris noveboracensis (Thelypteridaceae) in a Northeast mixed hardwoods-hemlock forest. Am. J. Bot. 88: 894-902.
90. Hille Ris Lambers, J., and Clark, J.S. 2003. Effects of dispersal, shrubs, and density-dependent mortality on seed and seedling distributions in temperate forests. Can. J. For. Res. 33: 783-795.
91. Hix, D.M., Fosbroke, D.E., Hicks, R.R., Jr., and Gottschalk, K.W. 1991. Development of regeneration following gypsy moth defoliation of Appalachian Plateau and Ridge and Valley hardwood stands. In Proceedings, 8th Central Hardwood Forest Conference, University Park, Pa., 4-6 March 1991. Edited by L.H. McCormick and K.W. Gottschalk. USDA For. Serv. Gen. Tech. Rep. NE-148. pp. 347-359.
92. Hogg, E.H., and Lieffers, V.J. 1991. The impact of Calamagrostis canadensis on soil thermal regimes after logging in northern Alberta. Can. J. For. Res. 21: 387-394.
93. Holt, R.D. 1977. Predation, apparent competition, and the structure of prey communities. Theor. Popul. Biol. 12: 197-229.
94. Holt, R. D. 1984. Spatial heterogeneity, indirect interactions, and the coexistence of prey species. Am. Nat. 142: 623-645.
95. Horsley, S.B. 1977. Allelopathic inhibition of black cherry. II. Inhibition by woodland grass, ferns, and club moss. Can. J. For. Res.. 7: 515-519.
96. Horsley, S.B. 1985. Reforestation or orchard stands and savannahs on Pennsylvania's Allegheny Plateau. North. J. Appl. For. 2: 22-26.
97. Horsley, S.B. 1993a. Mechanisms of interference between hayscented fern and black cherry. Can. J. For. Res. 23: 2059-2069.
98. Horsley, S.B. 1993b. Role of allelopathy in hay-scented fern interference with black cherry regeneration. J. Chem. Ecol. 19: 2737-2755.
99. Horsley, S.B., and Marquis, D.A. 1983. Interference by weeds and deer with Allegheny Pennsylvania U.S.A. hardwood reproduction. Can. J. For. Res. 13: 61-69.
100. Horsley, S.B., Stout, S.L., and DeCalesta, D.S. 2003. White-tailed deer impact on the vegetation dynamics of a northern hardwood forest. Ecol. Appl. 13: 98-113.
101. Houle, G. 1990. Regenerative traits of tree species in a deciduous forest of northeastern North America. Holarct. Ecol. 14: 142-151.
102. Howe, H.F., and Brown, J.S. 2001. The ghost of granivory past. Ecol. Let. 4: 371-378.
103. Huenneke, L.F. 1983. Understory response to gaps caused by the death of Ulmus americana in central New York. Bull. Torrey Bot. Club, 110: 170-175.
104. Husheer, S.W., Coomes, D.A., and Robertson, A.W. 2003. Long-term influences of introduced deer on the composition and structure of New Zealand Nothofagus forests. For. Ecol. Manage. 181: 99-117.
105. Iida, S. 2004. Indirect negative influence of dwarf bamboo on survival of Quercus acorn by hoarding behavior of wood mice. For. Ecol. Manage. 202: 257-263.
106. Inderjit and Callaway, R.M. 2003. Experimental designs for the study of allelopathy. Plant Soil, 256: 1-11.
107. Inderjit and Mallik, A.U. 1996. The nature of interference potential of Kalmia angustifolia. Can. J. For. Res. 26: 1899-1904.
108. Jäderlund, A., Zackrisson, O., Dahlberg, A., and Nilsson, M.C. 1997. Interference of Vaccinium myrtillus on establishment, growth, and nutrition of Picea abies seedlings in a northern boreal site. Can. J. For. Res. 27: 2017-2025.
109. Jäderlund, A., Norberg, G, Zackrisson, O., Dahlberg, A., Teketay, D., Dolling, A., and Nilsson, M.C. 1998. Control of bilberry vegetation by steam treatment - effects on seeded Scots pine and associated mycorrhizal fungi. For. Ecol. Manage. 108: 275-285.
110. Jane, G.T., and Pracy, L.T. 1974. Observations on two animal exclosures in Haurangi Forest over a period of 20 years (1951-1971). N.Z. J. For. 19: 102-113.
111. Kelly, V.R., and Canham, C.D. 1992. Resource heterogeneity in oldfields. J. Veg. Sci. 3: 545-552.
112. Kimmins, J.P. 1996. Importance of soil and role of ecosystem disturbance for sustained productivity of cool temperate and boreal forests. Soil Sci. Soc. Am. J. 60: 1643-1654.
113. Kobe, R., Pacala, S.W., Silander, J.A., Jr., and Canham, C.D. 1995. Juvenile tree survivorship as a component of shade tolerance. Ecol. Appl. 5: 517-522.
114. Kochummen, K.M., and Ng, F.S.P. 1977. Natural plant succession after farming in Kepong. Malays. For. 40: 61-78.
115. Koop, H., and Hilgen, P. 1987. Forest dynamics and regeneration mosaic shifts in unexploited beech (Fagus sylvatica) stands at Fontainebleau (France). For. Ecol. Manage. 20: 135-150.
116. Krause, H.H., Weetman, G.F., and Arp, P.A. 1978. Nutrient cycling in boreal forest ecosystems of North America. In Proceedings of the 5th North American Forest Soils Conference, Fort Collins, Colo., August 1978. Edited by C.T. Youngbert. Colorado State University, Fort Collins, Colo. pp. 287-319.
117. Kurmis, V., and Sucoff, E. 1989. Population density and height distribution of Corylus cornuta in undisturbed forests of Minnesota: 1965-1984. Can. J. Bot. 67: 2409-2413.
118. Latham, R.E. 2003. Shrubland longevity and rare plant species in the northeastern United States. For. Ecol. Manage. 185: 21-39.
119. Lei, T.T., Semones, S.W., Walker, J.F., Clinton, B.D., and Nilsen, E.T. 2002. Effects of Rhododendron maximum thickets on tree seed dispersal, seedling morphology, and survivorship. Int. J. Plant Sci. 163: 991-1000.
120. Levine, J.M., Vila, M., D'Antonio, C.M., Dukes, J.S., Grigulis, K, and Lavorel, S. 2003. Mechanisms underlying the impacts of exotic plant invasions. Proc. R. Soc. Lond. B. Biol. Sci. 270: 775-781.
121. Lieffers, V.J., Macdonald, S.E., and Hogg, E.H. 1993. Ecology of and control strategies for Calamagrostis canadensis in boreal forest sites. Can. J. For. Res. 23: 2070-2077.
122. Lipscomb, M.V., and Nilsen, E.T. 1990. Environmental and physiological factors influencing the natural distribution of evergreen and deciduous ericaceous shrubs on northeast and southwest slopes of the southern Appalachian mountains. I. Irradiance tolerance. Am. J. Bot. 77: 108-115.
123. Löf, M. 2000. Establishment and growth in seedlings of Fagus sylvatica and Quercus robur: influence of interference from herbaceous vegetation. Can. J. For. Res. 30: 855-864.
124. Lusk, C.H. 2001. When is a gap not a gap? Light levels and leaf area index in bamboo-filled gaps in a Chilean rain forest. Gayana Bot. 58: 25-30.
125. Lutz, H.J. 1930. The vegetation of Heart's Content: a virgin forest in northwestern Pennsylvania. Ecology, 11: 1-29.
126. Maheswaran, J., and Guatilleke, I.A.U.N. 1988. Litter decomposition in a lowland rain forest and a deforested area in Sri Lanka. Biotropica, 20: 90-99.
127. Mallik, A.U. 1995. Conversion of temperate forests into heaths: role of ecosystem disturbance and ericaceous plants. Environ. Manage. 19: 675-684.
128. Mallik, A.U. 2003. Conifer regeneration problems in boreal and temperate forests with ericaceous understory: role of disturbance, seedbed limitation, and keystone species change. Crit. Rev. Plant Sci. 22: 341-366.
129. Mallik, A.U., and Inderjit. 2002. Kalmia angustifolia: ecology and management. Weed Technol. 15: 858-866.
130. Mancinelli, A.L. 1994. The physiology of phytochrome action. In Photomorphogenesis in plants. 2nd ed. Edited by R.E. Kendrik and G.H.M. Kronenberg. Kluwer Acacemic Press, Dordrecht, Netherlands. pp. 211-269.
131. Marks, P.L., and Gardescu, S. 1998. A case study of sugar maple (Acer saccharum) as a forest seedling bank species. J. Torrey Bot. Soc. 125: 287-296.
132. Marquis, D.A., Ernst, R.L., and Stout, S.L. 1990. Prescribing silvicultural treatments in hardwood stands of the Alleghenies (Revised). USDA For. Serv. Gen. Tech. Rep. GTR NE-96.
133. Marrs, R.H., Johnson, S.W., and Le Duc, M.G. 1998. Control of bracken and restoration of heathland. VIII. The regeneration of the heathland community after 18 years of continued bracken control or 6 years of control followed by recovery. J. Appl. Ecol. 35: 857-870.
134. Maubon, M., Ponge, J.F., and Andre, J. 1995. Dynamics of Vaccinium myrtillus patches in mountain spruce forest. J. Veg. Sci. 6: 343-348.
135. May, T. 2000. Respuesta de la vegetacion en un calimetal de Dicranopteris pectinata despues de un fuego, en la parte oriental de la Cordillera Central, Republica Dominicana. Moscosoa, 11: 113-132.
136. McCarthy, J. 2001. Gap dynamics of forest trees: a review with particular attention to boreal forests. Environ. Rev. 9: 1-59.
137. McPhee, C., and Aarssen, L. 2001. The separation of above-and belowground competition in plants: a review and critique of methodology. Plant Ecol. 152: 119-136.
138. McShea, W.J., Underwood, H.B., and Rappole, J.H. 1997. The science of overabundance: deer ecology and population management. Smithsonian Institution Press. Washington D.C.
139. McWilliams, W.H., Stout, S.L., Bowersox, T.W., and McCormick, L.H. 1995. Adequacy of advance tree-seedling regeneration in Pennsylvania's forests. North. J. Appl. For. 12: 187-191.
140. Meades, W.J. 1983. Heathlands. In Biogeography and ecology of the island of Newfoundland. Edited by G.R. South. Dr. W. Junk Publishers, The Hague, Netherlands. pp. 267-318.
141. Messier, C. 1992. Effects of neutral shade and growing media on growth, biomass allocation, and competitive ability of Gaultheria shallon. Can. J. Bot. 70: 2271-2276.
142. Messier, C. 1993. Factors limiting early growth of western red cedar, western hemlock and Sitka spruce seedlings on ericaceous-dominated clearcut sites in coastal British Columbia. For. Ecol. Manage. 60: 181-206.
143. Messier, C., and Kimmins, J.P. 1990. Nutritional stress in Picea sitchensis plantation in coastal British Columbia: the effects of Gaultheria shallon and declining site fertility. Water Air Soil Pollut. 54: 257-267.
144. Messier, C., and Kimmins, J.P. 1991. Above- and belowground vegetation recovery in recently clearcut and burned sites dominated by Gaultheria shallon in coastal British Columbia. For. Ecol. Manage. 46: 275-294.
145. Messier. C., Honer, T.W., and Kimmins, J.P. 1989. Photosynthetic photon flux density, red to far-red ratio, and minimum light requirement for survival of Gaultheria shallon in western red cedar-western hemlock stands in coastal British Columbia (Canada). Can. J. For. Res. 19: 1470-1477.
146. Messier, C., Parent, S., and Bergeron, Y. 1998. Effects of overstory and understory vegetation on the understory light environment in mixed boreal forests. J. Veg. Sci. 9: 511-520.
147. Michelsen, A., Schmidt, I.K., Jonasson, S., Dighton, J., Hones, H.E., and Callaghan, T. V. 1995. Inhibition of growth and effects on nutrient uptake of artic graminoids byleaf extracts - allelopathy or resource competition between plants and microbes? Oecologia, 103: 407-418.
148. Monk. C.D., McGinty, D.T., and Day, F.P., Jr. 1985. The ecological importance of Kalmia latifolia and Rhododendron maximum in the deciduous forest of the southern Appalachians. Bull. Torrey Bot. Club, 112: 187-193.
149. Moola, F.M., and Mallik, A.U. 1998. Morphological plasticity and regeneration strategies of velvet leaf blueberry (Vaccinium myrtilloides Michx.) following canopy disturbance in boreal mixed wood forests. For. Ecol. Manage. 111: 35-50.
150. Muller, C. 1969. Allelopathy as a factor in ecological process. Vegetatio, 18: 348-357.
151. Muzika, R.M., and Twery, M.J. 1995. Regeneration in defoliated and thinned hardwood stands of north-central West Virginia. In Proceedings, 10th Central Hardwood Forest Conference, Morgantown, W.Va., 5-8 March 1995. Edited by K.W. Gottschalk and S.L.C. Fosbroke. USDA For. Serv. Gen. Tech. Rep. NE-197. pp. 326-340.
152. Nakashizuka, T. 1987. Regeneration dynamics of beech forests in Japan. Vegetatio, 69: 169-175.
153. Nambiar, E.K.S., and Sands, R. 1993. Competition for water and nutrients in forests. Can. J. For. Res. 23: 1955-1968.
154. Nelson, B.W. 1994. Natural forest disturbance and change in the Brazilian Amazon. Remote Sens. Rev. 10: 105-125.
155. Niering, W.A., and Egler, F.E. 1955. A shrub community of Viburnum lentago, stable for twenty-five years. Ecology, 36: 356-360.
156. Niering, W.A., and Goodwin, R.H. 1974. Creation of relatively stable shrublands with herbicides: arresting "succession" on rights-of-way and pastureland. Ecology, 55: 784-795.
157. Nilsen, E.T., Walker, J.F., Miller, O.K., Semones, S.W., Lei, T.T., and Clinton, B.D. 1999. Inhibition of seedling survival under Rhododendron maximum (Ericaceae): Could allelopathy be a cause? Am. J. Bot. 86: 1597-1605.
158. Nilsen, E.T., Clinton, B.D., Lei, T.T., Miller, O.K., Semones, S.W., and Walker, J.F. 2001. Does Rhododendron maximum L. (Ericaceae) reduce the availability of resources above and belowground for canopy tree seedlings? Am. Midl. Nat. 145: 325-343.
159. Nilsson, M.C. 1994. Separation of allelopathy and resource competition by the boreal dwarf shrub Empetrum hermaphroditum Hagerup. Oecologia, 98: 1-7.
160. Nilsson, M.C., Zackrisson, O., Sterner, O., and Wallstedt, A. 2000. Characterisation of the differential interference effects of two boreal dwarf shrub species. Oecologia, 123: 122-128.
161. Nolte, D.L., and Barnett, J.P. 2000. A repellent to reduce mouse damage to longleaf pine seed. Int. Biodeterior. Biodegrad. 45: 169-174.
162. Nyland. R.D. 2002. Silviculture: concepts and applications. McGraw-Hill Higher Education, Burr Ridge, Ill.
163. Oliver, C.D., and Larson, B.C. 1996. Forest stand dynamics. Updated edition. John Wiley & Sons, Inc., New York
164. Ostfeld, R.S., and Canham, C.D. 1993. Effects of meadow vole population density on tree seedling survival in old fields. Ecology, 74: 1792-1801
165. Pacala, S.W., Canham, C.D., Silander, J.A., Jr., and Kobe, R.K. 1994. Sapling growth as a function of resources in a north temperate forest. Can. J. For. Res. 24: 2172-2183.
166. Pacala, S.W., Canham, C.D., Saponara, J., Silander, J.A., Jr., Kobe, R.K., and Ribbens, E. 1996. Forest models defined by field measurements: Estimation, error analysis and dynamics. Ecol. Monogr. 66: 1-43.
167. Packer, A., and Clay, K. 2000. Soil pathogens and spatial patterns of seedling mortality in a temperate tree. Nature (London). 404: 278-281.
168. Payette, S., and Delwaide, A. 2003. Shift of conifer boreal forest to lichen-heath parkland caused by successive stand disturbances. Ecosystems, 6: 540-550.
169. Perez-Salicrup, D.R., and Barker, M.G. 2000. Effect of liana cutting on water potential and growth of adult Senna multijuga (Caesalpinioideae) trees in a Bolivian tropical forest. Oecologia, 124: 469-475.
170. Peterson, C.J. 1984. Does a rigorous criterion for environmental identity preclude the existence of multiple stable points? Am. Nat. 124: 127-133.
171. Petraitis, P.S., and Latham, R.E. 1999. The importance of scale in testing the origins of alternative community states. Ecology, 80: 429-442.
172. Pfitsch, W.A., and Smith, A.P. 1988. Growth and photosynthesis of Aechmea magdalenae, a terrestrial CAM plant in a tropical moist forest, Panama. J. Trop. Ecol. 24: 199-207.
173. Prescott, C.E., Coward, L.P., Weetman, G.F., and Gessel, S.P. 1993. Effects of repeated nitrogen fertilization on the ericaceous shrub, salal (Gaultheria shallon) in two coastal Douglas-fir forests. For. Ecol. Manage. 61: 45-60.
174. Price, D.T., Black, T.A., and Kelliher, F.M. 1986. Effects of salal understory removal on photosynthetic rate and stomatal conductance of young Douglas-fir trees. Can. J. For. Res. 16: 90-97.
175. Putz, F.E. 1991. Silvicultural effects of lianas. In The biology of vines. Edited by F.E. Putz and H.A. Mooney. Cambridge University Press, New York. pp. 493-501.
176. Putz, F.E., and Canham, C.D. 1992. Mechanisms of arrested succession in shrublands: root and shoot competition between shrubs and tree seedlings. For. Ecol. Manage. 49: 267-275
177. Raich, J.W., and Christensen, N.L. 1989. Malaysian dipterocarp forest: tree seedling and sapling species composition and small scale disturbance patterns. Natl. Geogr. Res. 5: 348-363.
178. Reader, R.J. 1993. Control of seedling emergence by ground cover and seed predation in relation to seed size for some old field species. J. Ecol. 81: 169-175.
179. Reich, P.B., Grigal, D.F., Aber, J.D., and Gower, S.T. 1997. Nitrogen mineralization and productivity in 50 hardwood and conifer stands on diverse soils. Ecology, 78: 335-347.
180. Ricard, J.P., Messier, C., DeLaGrange, S., and Beaudet, M. 2003. Do understory sapling respond to both light and belowground competition?: a field experiment in a north-eastern American hardwood forest and a literature review. Ann. For. Sci. 60: 749-756.
181. Richburg, J.A., Dibble, A.C.. and Patterson, W.A. 2001. Woody invasive species and their role in altering fire regimes of the Northeast and Mid-Atlantic states. In Proceedings of the Invasive Species Workshop: The Role of Fire in the Control and Spread of Invasive Species, San Diego, Calif., 1 December - 27 November 2000. Edited by K.E.M. Galley and T.P. Wilson. Tall Timbers Research Station, Tallahassee, Fla. pp. 104-111.
182. Roberts, M.R. 2004. Response of the herbaceous layer to natural disturbance in North American forests. Can. J. Bot. 82: 1273-1283.
183. Rogers, G.M., and Leathwick, J.R. 1997. Factors predisposing forests to canopy collapse in the Southern Ruahine Range, New Zealand. Biol. Conserv. 80: 325-338.
184. Rooney, T.P., and Dress, W.J. 1997. Species loss over sixty-six years in the ground layer vegetation of Heart's Content, an old-growth forest in Pennsylvania USA. Nat. Areas J. 17: 297-305.
185. Runkle, J.R. 1981. Gap regeneration in some old-growth forests of the eastern United States. Ecology, 62: 1041-1051.
186. Runkle, J.R. 1982. Patterns of disturbance in some old-growth forests of the eastern North America. Ecology, 63: 1533-1546.
187. Runkle, J.R. 1990. Gap dynamics in an Ohio Acer-Fagus forest and speculations on the geography of disturbance. Can. J. For. Res. 20: 632-641.
188. Russell, A.E., Raich, J.W., and Vitousek, P.M. 1998. The ecology of the climbing fern Dicranopteris linearis on windward Mauna Loa, Hawaii. J. Ecol. 86: 765-779.
189. Russell, F.L., Zippin, D.B., and Fowler, N.L. 2001. Effects of white-tailed deer (Odocoileus virginianus) on plants, plant populations and communities: a review. Am. Midl. Nat. 146: 1-26.
190. Sabhasri, S., and Ferrall, W.K. 1960. Invasion of brush species into small stand openings in the Douglas Fir forests of the Willamette Foothils. Northwest Sci. 34: 77-88.
191. Schmilz, O.J., and Sinclair, A.R.E. 1997. Rethinking the role of deer in forest ecosystem dynamics. In The science of overabundance: deer ecology and population management. Edited by W.J. McShea, H.B. Underwood, and J.H. Rappole. Smithsonian Institution Press, Washington, D.C. pp. 201-223.
192. Schnitzer, S.A., and Bongers, F. 2002. The ecology of lianas and their role in forests. Trends Ecol. Evol. 17: 223-230.
193. Schnitzer, S.A., Dalling, J.W., and Carson, W.P. 2000. The impact of lianas on tree regeneration in tropical forest canopy gaps: evidence for an alternative pathway of gap-phase regeneration. J. Ecol. 88: 655-666.
194. Schnitzer, S.A., Parren, M.P.E., and Bongers, F. 2004. Recruitment of lianas into logging gaps and the effects of pre-harvest climber cutting in a lowland forest in Cameroon. For. Ecol. Manage. 190: 87-98.
195. Schnurr, J.L., Canham, C.D., Ostfeld, R.S., and Inouye, R.S. 2004. Neighborhood analyses of small mammal dynamics: Impacts on seed predation and seedling establishment. Ecology, 85: 741-755.
196. Schreiner, M., Bauer, E.M., and Kollmann, J. 2000. Reducing predation of conifer seeds by clear-cutting Rubus fruticosus agg. In two montane forest stands. For. Ecol. Manage. 126: 281-290.
197. Seymour, R.S., White, A.S., and deMaynadier, P.G. 2002. Natural disturbance regimes in northeastern North America - evaluating silvicultural systems using natural scales and frequencies. For. Ecol. Manage. 155: 357-367.
198. Sharitz, R.R.. Boring, L.R., Van Lear, D.H., and Pinder, J.E., III. 1992. Integrating ecological concepts with natural resource management of southern forests. Ecol. Appl. 2: 226-237.
199. Shugart, H.H., and West, D.C. 1977. Development of an Appalachian deciduous forest model and its application to assessment of the impact of the chestnut blight. J. Environ. Manage. 5: 161-179.
200. Smith, H.C. 1984. Forest management guidelines for controlling wild grapevines. USDA For. Ser. Res. Pap. NE-548.
201. Smith, T.M., and Urban, D.L. 1988. Scale and resolution of forest structural pattern. Vegetatio, 74: 143-150.
202. Stromayer, K.A.K., and Warren, R.J. 1997. Are overabundant deer herds in the eastern United States creating alternate stable states in forest plant communities? Wildl. Soc. Bull. 25: 227-234.
203. Sutherland, J.P. 1974. Multiple stable points in natural communities. Am. Nat. 108: 859-873.
204. Sutherland, J.P. 1990. Perturbations, resistance, and alternative views of the existence of multiple stable points in nature. Am. Nat. 136: 270-275.
205. Tansley, A.G. 1935. The use and abuse of vegetational concepts and terms. Ecology, 16: 284-307.
206. Tappeiner, J.C. 1971. Invasion and development of beaked hazel in red pine stands in northern Minnesota. Ecology, 52: 514-519.
207. Tappeiner, J.C., and John, H.H. 1973. Biomass and nutrient content of hazel undergrowth. Ecology, 54: 1342-1348.
208. Tappenier, J.C., Zasada, J., Ryan, P., and Newton. M. 1991. Salmonberry clonal and population structure: the basis for a persistent cover. Ecology, 72: 609-618.
209. Tappeiner, J.C., II, Zasada, J.C., Huffman, D.W., and Ganio, L.M. 2001. Salmonberry and salal annual aerial stem production: the maintenance of shrub cover in forest stands. Can. J. For. Res. 31: 1629-1638.
210. Taylor, A.H., and Zisheng, Q. 1988. Regeneration patterns in oldgrowth Abies and Betula forests in the Woolong Natural Preserve, Sichuan, China. J. Ecol. 76: 1204-1218.
211. Taylor, A.H., Qin, Z., and Liu, J. 1995. Tree regeneration in an Abies faxoniana forest after bamboo dieback Wang Lang Natural Reserve, China. Can. J. For. Res. 25: 2034-2039.
212. Tremblay, M., Messier, C., and Marceau, D.J. 2005. Analysis of deciduous tree species dynamics after a severe ice storm using SORTIE model simulations. Ecol. Mod. 187: 297-313.
213. Uhl, C., Clark, K., Dezzeo, N., and Maquirino, P. 1988. Vegetation dynamics in Amazonian treefall gaps. Ecology, 69: 751-763.
214. Vandermast, D.B., and Van Lear, D.H. 2002. Riparian vegetation in the southern Appalachian mountains (USA) following chestnut blight. For. Ecol. Manage. 155: 97-106.
215. Veblen, T.T. 1982. Growth patterns of Chusquea bamboos in the understory of Chilean Nothofagus forests and their influences in forest dynamics. Bull. Torrey Bot. Club, 109: 474-487.
216. Wada, N. 1993. Dwarf bamboos affect the regeneration of zoochorous trees by providing habitats to acorn-feeding rodents. Oecologia, 94: 403-407.
217. Walker, L.R. 1994. Effects of fern thickets on woodland development on landslides in Puerto Rico. J. Veg. Sci. 5: 525-532.
218. Walker, L.R., and Boneta, W. 1995. Plant and soil responses to fire on a fern-covered landslide in Puerto Rico. J. Trop. Ecol. 11: 473-479.
219. Walker, J.F., Miller, O.K., Jr., Lei, T., Semones, S., Nilsen, E., and Clinton, B.D. 1999. Suppression of ectomycorrhizae on canopy tree seedlings in Rhododendron maximum L. (Ericaceae) thickets in the southern Appalachians. Mycorrhiza, 9: 49-56.
220. Waller, D.M., and Alverson, W.S. 1997. The white-tailed deer: a keystone herbivore. Wild. Soc. Bull. 25: 217-226.
221. Wardle, D.A., and Nilsson, M.C. 1997. Microbe-plant competition, allelopathy, and artic plants. Oecologia, 109: 291-293.
222. Wardle, D.A., Nilsson, M.-C., Gallet, C.. and Zackrisson, O. 1998. An ecosystem-level perspective of allelopathy. Biol. Rev. 73: 305-319.
223. Wardle, D.A., Barker, G.M., Yeates, G.W., Bonner, K.I., and Ghani, A. 2001. Introduced browsing mammals in New Zealand natural forests: aboveground and belowground consequences. Ecol. Monogr. 71: 587-614.
224. Watt, A.S. 1947. Pattern and process in the plant community. J. Ecol. 35: 1-22.
225. Webb, S.L., and Scanga, S.E. 2001. Windstorm disturbance without patch dynamics: twelve years of change in a Minnesota forest. Ecology, 82: 893-897.
226. Weidenhamer, J.D. 1996. Distinguishing resource competition and chemical interference: overcoming the methodological impasse. Agron. J. 88: 866-875.
227. Williamson, G.B. 1990. Allelopathy, Koch's postulates and the neck riddle. In Perspectives on plant competition. Edited by J.B. Grace and D. Tilman. Academic Press, San Diego, Calif. pp. 143-162.
228. Woods, F.W., and Shanks, R.E. 1959. Natural replacement of chestnut in the Great Smoky Mountains National Park. Ecology. 40: 349-361.
229. Yamasaki, S.H., Fyles, J.W., Egger, K.N., and Titus, B.D. 1998. The effect of Kalmia angustifolia on growth, nutrition, and ectomycorrhizal symbiont community of black spruce. For. Ecol. Manage. 105: 197-207.
230. Youngblood, R., and Titus, B. 1996. Clear-cutting: a regeneration method in the boreal forest. For. Chron. 72: 31-36.
231. Zackrisson, O., Nilsson, M.C., Dahlberg, A., and Jaderlund, A. 1997. Interference mechanisms in conifer-Ericaceae-feathermoss communities. Oikos, 78: 209-220.