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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 65725
Title Diversity and dynamics of mycorrhizal associations in tropical rain forests with different disturbance regimes in South Cameroon
Author(s) Onguene, N.A.
Source Agricultural University. Promotor(en): L. Brussaard; T.W. Kuyper. - S.l. : S.n. - ISBN 9789058082930 - 167
Department(s) Sub-department of Soil Quality
PE&RC
Publication type Dissertation, internally prepared
Publication year 2000
Keyword(s) mycorrhizae - mycorrhizaschimmels - ectomycorrhiza - vesiculair-arbusculaire mycorrhizae - symbiose - bosecologie - regenbossen - tropische regenbossen - bosbedrijfsvoering - bosschade - entstofdichtheid - kameroen - mycorrhizas - mycorrhizal fungi - ectomycorrhizas - vesicular arbuscular mycorrhizas - symbiosis - forest ecology - rain forests - tropical rain forests - forest management - forest damage - inoculum density - cameroon
Categories Ecology of Tropical Forests
Abstract

The present study documents the occurrence of mycorrhizal associations in the rain forests of south Cameroon. All species investigated are mycorrhizal. Most timber species form arbuscular mycorrhiza, but some timber species, which usually occur in clumps, form ectomycorrhiza. Species diversity of ectomycorrhizal fungi in the undisturbed rain forest is substantial, with more than 125 species having been recorded. Inoculum potential of arbuscular mycorrhizal and ectomycorrhizal fungi is high in the undisturbed rain forest. The shifting cultivation cycle increases inoculum potential of arbuscular mycorrhizal fungi, but lowers inoculum potential of ectomycorrhizal fungi to various extent.

On sites of forestry practices (skid trails, landings) inoculum potential of arbuscular mycorrhizal and ectomycorrhizal fungi is very substantially reduced and recovery rates are low. Mycorrhizal colonisation and seedling growth are positively correlated with mycorrhiza inoculum potential. Inoculum potential of arbuscular mycorrhizal fungi and performance of seedlings of arbuscular mycorrhizal trees can be boosted after inoculum addition. Both inoculum quantity and inoculum quality are important criteria for inoculation practices. Ectomycorrhizal inoculum potential cannot be increased through inoculum addition and management of the intact ectomycorrhizal network is necessary for maintenance of the ectomycorrhizal tree species.

Key words : Arbuscular mycorrhiza, ectomycorrhiza, disturbance, rain forest, diversity, inoculum potential, Cameroon, forestry practices

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