Self-Thinning in Early Postfire Chaparral Succession: Mechanisms, Implications, and a Combined Approach
1998; Wiley; Volume: 79; Issue: 2 Linguagem: Inglês
10.2307/176954
ISSN1939-9170
AutoresQinfeng Guo, Philip W. Rundel,
Tópico(s)Landslides and related hazards
ResumoEcologyVolume 79, Issue 2 p. 579-586 Article SELF-THINNING IN EARLY POSTFIRE CHAPARRAL SUCCESSION: MECHANISMS, IMPLICATIONS, AND A COMBINED APPROACH Qinfeng Guo, Qinfeng Guo Department of Biology, University of California, Los Angeles, 900 Veteran Avenue, Los Angeles, California 90095 USA Present address:Department of Forestry, Fisheries, and Wildlife, 102 Plant Industry, University of Nebraska, Lincoln, Nebraska 68583-0814 USA.Search for more papers by this authorPhilip W. Rundel, Philip W. Rundel Department of Biology, University of California, Los Angeles, 900 Veteran Avenue, Los Angeles, California 90095 USASearch for more papers by this author Qinfeng Guo, Qinfeng Guo Department of Biology, University of California, Los Angeles, 900 Veteran Avenue, Los Angeles, California 90095 USA Present address:Department of Forestry, Fisheries, and Wildlife, 102 Plant Industry, University of Nebraska, Lincoln, Nebraska 68583-0814 USA.Search for more papers by this authorPhilip W. Rundel, Philip W. Rundel Department of Biology, University of California, Los Angeles, 900 Veteran Avenue, Los Angeles, California 90095 USASearch for more papers by this author First published: 01 March 1998 https://doi.org/10.1890/0012-9658(1998)079[0579:STIEPC]2.0.CO;2Citations: 21 Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract For two consecutive years (1995 and 1996), the self-thinning processes in nearly pure, even-aged stands of four dominant postfire chaparral species on Santa Monica Mountains, Southern California were quantified through the use of the "upper thinning boundary" and regression lines. During thinning, these species became less dense and more evenly distributed over space, but the total biomass significantly increased; the upper thinning boundaries (of total biomass) of all four species were better described by a slope of −1/2. In contrast, regression slopes of either total biomass or mean biomass per individual against density tended to be shallower than the upper thinning lines. The regression slopes were significantly shallower in 1995 than in 1996, indicating that self-thinning became more evident as biomass accumulated. The differences in regression slopes among species suggested that the stands of these four species were developing under different physical or biological regimes. Self-thinning was closely related to successional species replacement, and changes in canopy structure might be the main cause of variations in the biomass–density relationships. Use of both upper thinning line and regressions could greatly improve our understanding of self-thinning processes and their implications for chaparral succession. Literature Cited Bullock, S. H. 1981. Life history and seed dispersal of Dendromecon rigida.. Page 590 in C. E. Conrad and W. C. Oechel, editors. Dynamics and management of mediterranean-type ecosystems. General Technical Report PSW 58, USDA Forest Service, Pacific Southwest Forest and Range Experimental Station. Google Scholar Hamilton, N. R. S., C. Matthew, and G. Lemaire . 1995. In defence of the −3/2 boundary rule: a reevaluation of self-thinning concepts and status. Annals of Botany 76: 569–577. 10.1006/anbo.1995.1134 Web of Science®Google Scholar Hozumi, K. 1983. Ecological and mathematical considerations on self-thinning in even-aged pure stands. III. Effects of the linear growth factor on self-thinning and its model. Botanical Magazine (Tokyo) 96: 171–191. 10.1007/BF02498999 Web of Science®Google Scholar Hutchings, M. 1983. Ecology's law in search of a theory. New Scientist 98: 765–767. Web of Science®Google Scholar Keeley, J. E., P. H. Zedler, C. A. Zammit, and T. J. Stohlgren . 1989. Fire and demography. Pages 151–153 in S. Keeley, editor. The California chaparral: paradigms reexamined. Natural History Museum of Los Angeles, Los Angeles, California, USA. Google Scholar Latto, J. 1994. Evidence for a self-thinning rule in animals. Oikos 69: 531–534. 10.2307/3545867 Web of Science®Google Scholar Lonsdale, W. M. 1990. The self-thinning rule: dead or alive? Ecology 71: 1373–1388. 10.2307/1938275 Web of Science®Google Scholar Morris, E. C., and P. J. Myerscough . 1983. Banksia ericifolia transgresses the self-thinning boundary. Australian Journal of Ecology 8: 199–201. 10.1111/j.1442-9993.1983.tb01607.x Web of Science®Google Scholar Niklas, K. J. 1994. Plant allometry. University of Chicago Press, Chicago, Illinois, USA. Google Scholar Norberg, R. A. 1988. Theory of growth geometry of plants and self-thinning of plant populations: geometric similarity, elastic similarity, and different growth modes of plant parts. American Naturalist 131: 220–256. 10.1086/284787 Web of Science®Google Scholar Osawa, A. 1995. Inverse relationship of crown fractal dimension to self-thinning exponent of tree populations: a hypothesis. Canadian Journal of Forest Research 25: 1608–1617. 10.1139/x95-175 Web of Science®Google Scholar Osawa, A. A., and R. B. Allen . 1993. Allometric theory explains self-thinning relationships of mountain beech and red pine. Ecology 74: 1020–1032. 10.2307/1940472 Web of Science®Google Scholar Osawa, A., and S. Sugita . 1989. The self-thinning rule: another interpretation of Weller's results. Ecology 70: 279–283. 10.2307/1938435 Web of Science®Google Scholar Petraitis, P. S. 1995. Use of average vs. total biomass in self-thinning relationships. Ecology 76: 656–658. 10.2307/1941224 Web of Science®Google Scholar Riggan, P. J., S. E. Franklin, J. A. Brass, and F. E. Brooks . 1994. Perspectives on fire management in mediterranean ecosystems of southern California. Pages 140–162 in J. Moreno and W. Oechel, editors. Fire and global change in mediterranean ecosystems. Ecosystem Analysis Series, Springer-Verlag, New York, New York, USA. Google Scholar Riggan, P. J., S. Goode, P. M. Jacks, and R. N. Lockwood . 1988. Interactions of fire and community development in chaparral of southern California. Ecological Monographs 58: 155–176. 10.2307/2937023 Web of Science®Google Scholar Rundel, P. W., and J. L. Vankat . 1989. Chaparral communities and ecosystems. Pages 127–139 in S. Keeley, editor. The California chaparral: paradigms reexamined. Natural History Museum of Los Angeles, Los Angeles, California, USA. Google Scholar Schlesinger, W. H., and D. S. Gill . 1978. Demographic studies of the chaparral shrub, Ceanothus megacarpus, in the Santa Ynez mountains, California. Ecology 59: 1256–1263. 10.2307/1938239 Web of Science®Google Scholar Schlesinger, W. H., and D. S. Gill . 1980. Biomass, production, and changes in the availability of light, water, and nutrients during the development of the chaparral shrub, Ceanothus megacarpus after fire. Ecology 61: 781–789. 10.2307/1936748 Web of Science®Google Scholar Shugart, H. H. 1984. A theory of forest dynamics. Springer-Verlag, New York, New York, USA. Google Scholar Weller, D. E. 1987. A reevaluation of the −3/2 power rule of plant self-thinning. Ecological Monographs 57: 23–43. 10.2307/1942637 Web of Science®Google Scholar Weller, D. E. 1989. The interspecific size–density relationship among crowded plant stands and its implications for the −3/2 power rule of self-thinning. American Naturalist 133: 20–41. 10.1086/284899 Web of Science®Google Scholar Weller, D. E. 1990. Will the real self-thinning rule please stand up? A reply to Osawa and Sugita. Ecology 71: 2004–2007. 10.2307/1937389 Web of Science®Google Scholar Weller, D. E. 1991. The self-thinning rule: dead or unsupported? A reply to Londale. Ecology 72: 747–750. 10.2307/2937216 Web of Science®Google Scholar Westoby, M. 1977. Self-thinning driven by leaf area not by weight. Nature 265: 330–331. 10.1038/265330a0 Web of Science®Google Scholar Westoby, M. 1981. The place of the self-thinning rule in population dynamics. American Naturalist 118: 581–587. 10.1086/283853 Web of Science®Google Scholar Westoby, M. 1984. The self-thinning rule. Advances in Ecological Research 14: 167–225. 10.1016/S0065-2504(08)60171-3 Web of Science®Google Scholar White, J. 1980. Demographic factors in populations of plants. Pages 21–48 in O. T. Solbrig, editor. Demography and evolution in plant populations. University of California Press, Berkeley, California, USA. Google Scholar White, J. 1981. The allometric interpretation of the self-thinning rule. Journal of Theoretical Biology 89: 475–500. 10.1016/0022-5193(81)90363-5 Web of Science®Google Scholar White, J. 1985. The thinning rule and its application to mixtures of plant populations. Pages 291–309 in J. White, editor. Studies on plant demography: a Festschrift for John L. Harper. Academic Press, London, UK. Google Scholar White, J., and J. L. Harper . 1970. Correlated changes in plant size and number in plant populations. Journal of Ecology 58: 467–485. 10.2307/2258284 Web of Science®Google Scholar Willey, R. W., and S. B. Heath . 1969. The quantitative relationships between plant population and crop yield. Advances in Agronomy 21: 281–321. 10.1016/S0065-2113(08)60100-5 Google Scholar Yoda, K., T. Kira, H. Ogawa, and K. Hozumi . 1963. Intraspecific competition among higher plants. IX. Self-thinning in overcrowded pure stands under cultivation and natural conditions. Journal of Biology, Osawa City University 14: 107–109. Google Scholar Zedler, P. H., and C. A. Zammit . 1989. A population-based critique of concepts of change in the chaparral. Pages 73–83 in S. Keeley, editor. The California chaparral: paradigms reexamined. Natural History Museum of Los Angeles, Los Angeles, California, USA. Google Scholar Zeide, B. 1987. Analysis of the 3/2 power law of self-thinning. Forest Science 33: 517–537. Web of Science®Google Scholar Citing Literature Volume79, Issue2March 1998Pages 579-586 ReferencesRelatedInformation
Referência(s)