权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

The role of genetic diversity in biodiversity-ecosystem functioning relationships

遗传多样性在生物多样性-生态系统功能关系中的作用

基本信息

批准号：
43905218
负责人：
Dr. Walter Durka
金额：
--
依托单位：
Plant Ecology
依托单位国家：
德国
项目类别：
Research Units
财政年份：
2008
资助国家：
德国
起止时间：
2007-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/43905218?language=en
关键词：
role genetic diversity biodiversity ecosystem

项目摘要

Genetic diversity is usually neglected in biodiversity-ecosystem functioning studies. However, functioning may depend on genetic diversity as well as on between-species diversity, and the two might interact. Also, variation in species diversity may affect genetic diversity. In four work packages (WP) we will explore the role of genetic diversity (GD) and the effects of species diversity (SD) on GD.WP1: The role of experimental genetic diversity and of its interaction with expe rimental species diversity for plant performanceIn the Main Experiment, we factorially crossed SD and GD (different numbers of seed families) on 24 1-mu plots. We will comprehensively assess plant performance (biomass, growth, herbivory, pathogen load) of all trees on these plots in relation to GD and its interaction with SD.WP2: Experimental SD effects on genetic variation of phytometer treesResident and additional phytometer trees of defined seed families allow us to assess genetic variation in plant performance and the relative roles of genetic variation and phenotypic plasticity in tree responses to diversity.Task 1: Assessing resident phytometer tree performance (seed families of 12 species regularly planted in the Main Experiment, totaling >45000 individuals)Task 2: Assessing additional phytometer tree performance (seed families of 1 species, Machilus thunbergii, in all plots, totaling >7000 individuals)We will assess plant performance (biomass production, growth, herbivory, pathogen load) of all phytometer trees to analyze genetic variation, phenotypic plasticity, and genetic variation in plasticity (i.e. seed family x environment interactions) in response to SD and composition in the plots.WP3: Natural SD effects on genetic variationWe established a common garden with hundreds of clones of ten clonal shrub species collected in the CSPs. We will use this experiment to address effects of SD and composition of the CSPs on quantitative genetic variation. Moreover, we will transplant clones (cuttings) to plots of low and high species diversity to address the relative importance of phenotypic plasticity and genetic variation for plant performance in the CSPs, and to test whether there is adaptation to diversity or specific CSPs. If transplantation to the CSPs should not be permitted, we will transplant to high and low diversity plots of the Main Experiment.WP 4: Flowering and reproductionGenetic diversity depends to an increasing degree on differential offspring recruitment in the plots. Diversity effects on reproduction and offspring growth and survival may deviate from diversity effects on established trees. As a first step towards assessing offspring performance in relation to SD we will assess flowering, fruit set and seed set in the seven species of the Main Experiment that have already entered the reproductive state. Overall, our subproject will comprehensively explore the effects of SD on GD and the role of GD for plant performance.

在生物多样性-生态系统功能研究中，遗传多样性通常被忽视。然而，功能可能取决于遗传多样性以及物种间的多样性，这两者可能会相互作用。此外，物种多样性的变化可能会影响遗传多样性。在四个工作包(WP)中，我们将探索遗传多样性(GD)的作用和物种多样性(SD)对GD的影响。WP1：实验遗传多样性的作用及其与实验物种多样性的交互作用对植物性能的影响。在主要实验中，我们在24个1亩样地上进行了SD和GD(不同种子科数量)的析因杂交。我们将全面评估这些地块上所有树木的植物表现(生物量、生长、食草性、病原菌载量)与GD及其与SD的相互作用。WP2：实验SD对植气计树木遗传变异的影响已定义的种子科的留存和附加的植气计树允许我们评估植物性能的遗传变异以及遗传变异和表型可塑性在树木对多样性反应中的相对作用。任务1：评估常驻植气计树的性能(在主要实验中定期种植的12个种的种子族，总计45000棵)任务2：评估额外的植气计树性能(1个种的种子族，总计1个种，总计&GT；7,000个个体)我们将评估所有植树的植物表现(生物量生产、生长、食草性、病原菌负载)，以分析遗传变异、表型可塑性和可塑性遗传变异(即种子家族x环境互作)，以响应小区中的SD和组成。WP3：天然SD对遗传变异的影响我们建立了一个共同的花园，由CSP收集的10种无性系灌木物种的数百个无性系组成。我们将利用这个实验来研究SD和CSP的组成对数量遗传变异的影响。此外，我们将把无性系(插穗)移植到物种多样性低和高的地块，以解决CSP中表型可塑性和遗传变异对植物表现的相对重要性，并测试是否有对多样性或特定CSP的适应。如果不允许移植到CSP，我们将移植到主要试验的高多样性和低多样性地块。WP 4：开花和繁殖遗传多样性越来越依赖于地块中不同的后代招募。多样性对生殖和后代生长和存活的影响可能与对已建立的树木的多样性影响相背离。作为评估与SD相关的后代表现的第一步，我们将评估主要实验中已进入繁殖状态的七个物种的开花、结果和结实。总体而言，我们的子项目将全面探讨SD对GD的影响以及GD对工厂性能的作用。