INTERACTION BETWEEN THE CACTUS NEOBUXBAUMIA-TETETZO AND THE NURSE SHRUB MIMOSA-LUISANA

被引：121

作者：

VALIENTEBANUET, A

VITE, F

ZAVALAHURTADO, JA

机构：

[1] Centro de Ecologia, Universidad Nacional Autónoma de México, México City

[2] Departamento de Biologia, CBS, UAM‐Iztapalapa, México

来源：

JOURNAL OF VEGETATION SCIENCE | 1991年 / 2卷 / 01期

关键词：

COMPETITION; FACILITATION; GIANT COLUMNAR CACTUS;

D O I：

10.2307/3235892

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Pattern analysis and association analysis showed that recruitment of the giant columnar cactus Neobuxbaumia tetetzo in the semi-arid valley of Zapotitlan is largely limited to areas beneath the canopies of perennial shrubs, acting as nurse plants. Chi-square and Haberman tests revealed that young cacti were more frequently found beneath canopies of leguminous shrubs, especially Mimosa luisana, than were older cacti. Segregation analysis indicated a positive association (= negative segregation) of young cacti and M. luisana canopies, but older cacti were randomly distributed with respect to M. luisana. This, and the height class distributions of cacti associated with M. luisana or not, suggested the replacement of M. luisana by N. tetetzo. Mimosa luisana plants in association with N. tetetzo had greater amounts of dead basal area than M. luisana lacking associated N. tetetzo. This suggested competition from N. tetetzo promotes the replacement process. The roots of N. tetetzo are less-than-or-equal-to 30 cm deep. Interception of soil water before penetration to deeper roots of M. luisana may be the mode of competition between the two species.

引用

页码：11 / 14

页数：4

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