Arbuscular mycorrhizal fungal diversity in an Ethiopian montane forest with special emphasis on nurse-tree effect

正在进行的一项多学科研究的初步结果报告了所谓的护理树效应，该研究旨在为可持续管理穆内萨-沙希曼森林提供科学依据，作为埃塞俄比亚其他半落叶森林的样板。他们记录了与天然林中的再生密度相比，引种的桉树和蓝桉在树冠下再生的本地物种密度更高。在这样的森林生态系统中，种子在没有菌根共生体的情况下传播，树种在萌发时获得共生体，现有AMF群落的有效性是苗木建立和生长的重要组成部分。为了更好地了解这一特殊生态系统的功能，应通过调查丛枝菌根真菌(AMF)群落的菌根状况和多样性来补充这项工作，AMF群落定居在保育树和再生的本土树苗上。该项目还将评估从营养状况和水可获得性方面研究的各种本土树木的菌根状况。最后，该项目将为实验设计和苗圃提供本土AMF的接种。

Preliminary results from the ongoing work of a multidisciplinary study that aims at a scientific basis for a sustainable management of the Munessa-Shashemene forest as a model for other semi-decidouous forests of Ethiopia, reported the so-called nurse-tree effect. They documented higher density of regenerating native species under canopies of introduced Eucalyptus saligna, and E. globulus as compared to regeneration density in a natural forest. In such forest ecosystems, where seeds are dispersed without their mycorrhizal symbiont, tree species acquire a symbiont at the time of germination and the effectiveness of the existing AMF community is one important component of seedling establishment and growth. To get a better knowledge of the functioning of this particular ecosystem the work shall be complimented by investigation of the mycorrhizal status and the diversity of arbuscular mycorrhizal fungal (AMF) communities colonizing the nurse trees and the regeneratin indigenous tree seedlings. The project will also evaluate the mycorrhizal state of seedlings of diverse indigenous trees studied in respect to nutrient situations and water availability. Finally the project will provide inoculum of indigenous AMF for experimental designs and nurseries.