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Dissertation Research: Role of the Arbuscular Mycorrhizal Fungi Community in Pasture Recolonization by a Tropical Forest Tree

论文研究：丛枝菌根真菌群落在热带林木牧场再殖民中的作用

基本信息

批准号：
9902064
负责人：
Alison Power
金额：
--
依托单位：
Cornell University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-06-01 至 2003-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9902064&HistoricalAwards=false
关键词：
Dissertation Research Role Arbuscular Mycorrhizal

项目摘要

9902064PowerUnderstanding factors which influence forest regeneration in abandoned agricultural lands is a longstanding goal of terrestrial plant ecologists and a key challenge for tropical forest conservation. The mycorrhizal fungi community is an often-overlooked factor which may influence forest regeneration rates and plant species composition in regenerating landscapes. This dissertation research will use a combination of field studies, greenhouse experiments and molecular analyses to examine differences in mycorrhizal fungi community composition between tropical forest fragments and pastures, and whether these differences have consequences for seedling establishment in pastures by a tropical forest tree. Principal objectives of the research are to determine (1) whether species composition of mycorrhizal fungi differs between forest fragments and adjacent pastures, (2) whether species composition of mycorrhizae differs between forest- and pasture-grown seedlings of a tropical forest tree, and (3) whether mycorrhizal fungi of forest and pasture differ in their growth benefit to seedling hosts. Results of the proposed research have implications for pasture recolonization by forest tree species, forest regeneration and maintenance of plant and fungal diversity in human-impacted tropical ecosystems.

9902064 Power了解影响废弃农田森林再生的因素是陆生植物生态学家的长期目标，也是热带森林保护的关键挑战。菌根真菌群落是一个经常被忽视的因素，可能会影响森林更新速率和植物物种组成的更新景观。本论文的研究将使用相结合的实地研究，温室实验和分子分析，研究热带森林片段和牧场之间的菌根真菌群落组成的差异，以及这些差异是否有后果的幼苗建立在牧场的热带森林树木。研究的主要目的是确定（1）菌根真菌的物种组成是否不同的森林片段和相邻的牧场，（2）是否有不同的热带森林树木的森林和牧场生长的幼苗之间的菌根真菌的物种组成，和（3）是否有不同的森林和牧场的菌根真菌在其生长的好处，以幼苗主机。拟议的研究结果对森林树种的牧场化、森林再生以及人类影响的热带生态系统中植物和真菌多样性的维持具有影响。