Regeneration in an Ethiopian montane forest with special emphasis on tree biology and nurse-tree functions

在Munessa-Sheshamene地区（埃塞俄比亚），研究了若干块适度受干扰的天然林和外来树木人工林的水关系和选定的本地和外来树木的光合能力。这项正在进行的工作是由土壤科学家、地球植物学家和植物生态生理学家进行的一项生态系统研究的一部分，该研究旨在为Munessa森林的可持续管理提供科学基础，并将其作为埃塞俄比亚其他半落叶森林的典范。这项工作将分两个工作包继续进行，其中一个工作包将调查所谓的护士树效应。在这些“护理树”的庇护下，当地树木的幼树由意外到达的盐桉树、E. globulus或松的种子发育而成，其生长速度明显快于天然林。这种意想不到的护理树效应将在原生树木成功再生的种植园中进行研究。在第二个工作包中，将研究重要本土树种的再生生态，包括再生模式、再生能力和在自然和人工林情况下的有效再生成功。

In the Munessa-Sheshamene region (Ethiopia) several plots of moderately disturbed natural forest and of exotic tree plantations have been investigated with respect to water relations and photosynthetic capcity of selected indigenous and exotic trees. This ongoing work is part of an ecosystem study conducted by soil scientists, geobotanists and plant ecophysiologists that aims at a scientific basis for a sustainable management of the Munessa forest as a model for other semideciduous forests of Ethiopia. The work shall be continued in two working packages, one of which will investigate the so-called nurse-tree effect. Juveniles of indigenous trees developing from seeds that accidentally arrived in a plantation of Eucalyptus saligna, E. globulus or Pinus patula grow significantly faster under the shelter of these 'nurse-trees' than in a natural forest. This unexpected nurse-tree effect will be studied in plantations with a successful regeneration of indigenous trees. In the second working package, regeneration ecology of important indigenous tree species will be studied, comprising modes of regeneration, regenerative capacity and the effective regeneration success under natural and plantation situations.