PATTERN IN A DERIVED SAVANNA IN NIGERIA

被引：7

作者：

GREIGSMITH, P

机构：

[1] School of Plant Biology, University College of North Wales, Ardmore, Llandegfan, Menai Bridge, Gwynedd, LL59 5TS, Ty Mawr Lane

来源：

JOURNAL OF TROPICAL ECOLOGY | 1991年 / 7卷

关键词：

COMPETITION; FIRE; INTERFERENCE; PATTERN; NIGERIA; SAVANNA; TOTAL COVARIANCE;

D O I：

10.1017/S0266467400005873

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

All woody growth was enmerated in three transects, each 960 m x 20 m, in derived savanna in the Olokemeji Forest Reserve in south-west Nigeria. The data for species density, species basal area and stem girth classes were analysed by nested-block analysis of variance and convariance. The use of 'total convariance', the sum of all covariances at a block size, contributes to understanding of the pattern present. Three scales of pattern were evident. Patchiness at 160-320 m is interpreted as a response to soil differences or to the pattern of previous farming, which may itself have been determined by soil differences. Patchiness at 20-40 m is atributable to varying intensity of burning. At the smallest scale, of 10 m, there is evidence of regularity of distribution resulting from interference between individuals, possibly due to competition for water.

引用

页码：491 / 502

页数：12

共 25 条

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