期刊
FLORA
卷 204, 期 5, 页码 396-407出版社
ELSEVIER GMBH
DOI: 10.1016/j.flora.2008.05.004
关键词
Granite; Non-equilibrium coexistence; Rocky outcrops; Small-scale disturbance; Clusia minor; Plant interactions
A number of plant communities have been described on tropical inselbergs, known as hot spots of plant and animal biodiversity. However, few studies tried to question what drives seral processes in these harsh environments, submitted to natural hazards (violent storms, intense runoff and lightning strikes) which may destroy the vegetation cover and its accumulated organic matter. We analysed quantitative data from the granitic Nouragues inselberg (French Guiana) in order to discern how successional processes featured their variety. We showed that the transition from herbaceous carpets (bromeliaceous mats and grassy meadows) to woody vegetation (shrub thickets) was not conditioned by slope, but was truly successional. We also showed that there was a cycle of change in shrub thickets, reinitiated by the destruction of scrub vegetation by fire (lightnings), wood-destroying fungi and termites. (C) 2008 Elsevier GmbH. All rights reserved.
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