A phytolith index as a proxy of tree cover density in tropical areas:: Calibration with Leaf Area Index along a forest-savanna transect in southeastern Cameroon

被引：163

作者：

Bremond, L ^{[1
]}

Alexandre, A ^{[1
]}

Hély, C ^{[1
]}

Guiot, J ^{[1
]}

机构：

[1] UM GECO, CEREGE, CNRS, UMR 6635, F-13545 Aix En Provence, France

来源：

GLOBAL AND PLANETARY CHANGE | 2005年 / 45卷 / 04期

关键词：

phytoliths; LAI; pollen; tropical forest-savanna transition; calibration; Cameroon;

D O I：

10.1016/j.gloplacha.2004.09.002

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

The aim of the study is to calibrate the phytolith index of tree cover density, D/P (the ratio of ligneous dicotyledons phytoliths (D) over Poaceae phytoliths (P)) with Leaf Area Index (LAI) measurements. LAI is the vertically integrated surface of leaves per unit of ground area (m(2) leaves/m(2) ground). Modern soil samples from southeastern Cameroon, collected along a continuous forest-savarina transect, have been analyzed for phytoliths. Phytolith assemblages and D/P index clearly record the physiognomy of the forest and savanna communities and of the transition between both of them. A highly significant relationship was obtained between D/P and LAI. The relationship between phytolith data and the vegetation transect is also discussed and compared with existing palynological results obtained along the same transect. (c) 2004 Elsevier B.V All rights reserved.

引用

页码：277 / 293

页数：17

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