Density regulation of explosive population growth in Oxalis corymbosa

Abstract

Abstract: Ecological invasion is one of the most popular ecological focuses around the world.Ecological calamities caused by introducing exotic species were concerned recently.The mechanism of population regulation of Oxalis corymbosa,a non-indigenous species,was studied in 1999 Density regulation was determined by characteristics of morphology,dynamics and production.Modular populations could regulate their quantities and biomass.Although varied in module,leaves number and biomass were the most flexible and sensitive.Density regulation displayed on the levels of individual and module.Regulation on the level of leaf population caused that peak number of leaves per individual was different among populations.Regulation and self-thinning on the level of individual only happened in high-density population.Biomass and bulb production were influenced significantly by density.The relationship between biomass per ramet and population density conforms to -3/2-power law.Similar relationship happened between bulbs production and population density.

Key words: Hilly area, Plum orchard, Intercrop, Ecological effect

CLC Number:

Q948.1

YANG Juan, ZHONG Zhangcheng. Density regulation of explosive population growth in Oxalis corymbosa[J]. cje, 2004, (6): 1-5.

References

[1]江洪.1992.云杉种群生态学[M].北京:中国林业出版社.
[2]周纪纶,郑师章,杨持.1992.植物种群生态学[M].北京:高等教育出版社.
[3]梁晓东,叶万辉.2001.美国对入侵种的管理对策[J].生物多样性,9(1):90～94.
[4]Blossey B, Rolf Notzold. 1995. Evolution of Increased Competitive Ability in Invasive Nonindigenous Plants: a Hypothesis [ J ].J. Ecol., 83: 887～ 889.
[5]Braithwaite RW, Lonsdale WM. 1987. The Rarity of Sminthopsis virginiae in Relationship to Natural and Unnatural Habitats[J]. Conserv. Biol., 1: 341～ 343.
[6]Braithwaite RW, Lonsdale WM, Estbergs JA. 1989. Alien vegetation and native biota in tropical Australia: the impact of Mimosa pigra [J ]. Biol. Conserv., 48:189 ～ 210.
[7]Cronk QB, Fuller L. 1995. Plant Invaders [M]. London, UK:Chapman and Hall.
[8]Heywood VH. 1989. Patterns, Extents and Modes of Invasions by Terrestrial Plants. Biological Invasion: A Global Perspective [M]. Chichester, UK:John Wiley. 31 ～60.
[9]Hobbs RJ, Mooney HA. 1986. Community changes following shrub invasion of grassland[J]. Oecologia, 70: 508～ 513.
[10]Humphries SE, Groves RH, Mitchell DS. 1991. Plant invasions of australian ecosystems: a status review and management directions[J]. Kowari, 2:1 ～ 134.
[11]Luken JO, Thieret JW. 1997. Assessment and Management of Plant Invasions[ M]. New York: Spring-Verlag.
[12]Schmitz DC, Simberloft D, Hofstetter RH, et al. 1997. The Ecological Impact of Nondigenous Species[ A]. In: Simberloft D, eds.Strangersin Paradise: Impact and Management of Nondigenous Species in Florida[C]. Washington DC. :Island Press, 39～61.
[13]Silvertown J.(祝宁等译).1982.植物种群生态学导论[M].哈尔滨:东北林业大学出版社.
[14]Usher MB. 1988. Biological Invasions of Nature Reserves: a Search for Generalizations. [J]. Biol. Conserv., 44:119～ 135.
[15]Vitousek MC, Mcgraw JB, Yang HS. 1997. Within-population variation in demography of Taraxacum officinale: season-and size-dependent survival, growth and reproduction [J ]. J. Ecol., 80: 227～287.