FLORISTIC FLUCTUATIONS IN ANNUAL PASTURES - THE ROLE OF COMPETITION AT THE REGENERATION STAGE

被引：25

作者：

PECO, B

ESPIGARES, T

机构：

[1] Departamento Interuniversitario de Ecología, Universidad Autónoma de Madrid, Madrid, E-28049, Cantoblanco

来源：

JOURNAL OF VEGETATION SCIENCE | 1994年 / 5卷 / 04期

关键词：

AUTUMN RAIN; GERMINATION; PHYTOTRON; SEEDLING MORTALITY;

D O I：

10.2307/3235971

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Many studies have shown the existence of large between-year fluctuations in the floristic composition of annual Mediterranean pastures, and these fluctuations have been linked to autumn rainfall patterns. It has been postulated that differing interannual weather patterns may play a decisive role in competitive processes, especially during the period of germination and seedling establishment. Removal experiments in conjunction with rainfall manipulation in a phytotron were conducted to test whether competition affects germination and seedling mortality under different autumn rainfall patterns, in pastures at three successional stages after last being ploughed. Early and late autumn rains affect the floristic composition as certain species germinate better under certain conditions than others in each successional stage. In general, however, competition is not manifested through the inhibition of new germination once the space has been occupied, and density-dependent mortality is found only for a few species.

引用

页码：457 / 462

页数：6

共 44 条

[1]

BMDP Statistical Software, (1985)

[2]

Aarssen L.W., Epp G.A., Neighbour manipulations in a natural vegetation: a review, Journal of Vegetation Science, 1, pp. 13-30, (1990)

[3]

Aguiar M.R., Soriano A., Sala O.E., Competition and facilitation in the recruitment of seedlings in a Patagonian steppe, Funct. Ecol., 6, pp. 66-70, (1992)

[4]

Austin M.P., Use of a relative physiological performance value in the prediction of performance in multispecies mixtures from monoculture performance, J. Ecol., 70, pp. 559-570, (1982)

[5]

Austin M.P., Austin B.O., Behaviour of experimental plant communities along a nutrient gradient, The Journal of Ecology, 68, pp. 891-918, (1980)

[6]

Austin M.P., Groves R.H., Fresco L.M.F., Kaye P.E., Relative growth of six thistle species along a nutrient gradient with multispecies competition, J. Ecol., 73, pp. 667-684, (1985)

[7]

Austin M.P., Williams D.B., Belbin L., Grassland dynamics under sheep grazing in an Australian Mediterranean type climate, Vegetatio, 47, pp. 201-211, (1981)

[8]

Bartolome J.W., Germination and seedling establishment in California annual grassland, The Journal of Ecology, 67, pp. 273-281, (1979)

[9]

Belbin L., PATN: Pattern Analysis Package. Reference Manual, (1987)

[10]

Belbin L., Semi‐strong Hybrid Scaling, a new ordination algorithm, Journal of Vegetation Science, 2, pp. 491-496, (1991)

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