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

"DISSERTATION RESEARCH:" Complex Communities Drive Feedbacks Between Genetic and Ecological Diversity: A Case Study of Plant Defense Traits in Brassica Nigra

“论文研究：”复杂群落驱动遗传多样性和生态多样性之间的反馈：黑芥植物防御性状的案例研究

基本信息

批准号：
0508753
负责人：
Sharon Strauss
金额：
$ 1.19万
依托单位：
University of California-Davis
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2005
资助国家：
美国
起止时间：
2005-07-01 至 2007-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0508753&HistoricalAwards=false
关键词：
DISSERTATION RESEARCH Complex Communities Drive

项目摘要

Biodiversity continues to decline at both the species and genetic levels due to the impacts of humans on the environment. However, scientists currently have little knowledge of how declines in genetic diversity within species may affect the functioning of complex ecological communities. Plants posses many traits involved in defenses against herbivores, and these traits are often highly variable within populations. We will use two such traits in black mustard (Brassica nigra) to investigate how genetic variation in traits may affect the interactions between different plant species. In our experiments, we will manipulate the presence or absence of several groups of herbivores in order to determine how they affect the competitive outcome between plant species. We will also explore how this competitive outcome is altered by the genetic variation in defensive traits in B. nigra. Additionally, genetic variation is the fuel for natural selection. Therefore, we will investigate how this genetic variation is itself influenced by the ecological community, such as the diversity of plant or herbivore species, through altered patterns of natural selection. These findings on the interplay between genetic variation within a species and interactions between species in complex ecological communities will have important insights into the management of genetic diversity in both natural and agricultural systems. Understanding what role genetic variation may play in the interactions within complex communities is vital if we are to make accurate predictions about how communities will change as genetic diversity continues to decline.

由于人类对环境的影响，物种和基因层面的生物多样性持续下降。然而，科学家目前对物种内遗传多样性的下降如何影响复杂生态群落的功能知之甚少。植物具有许多与防御食草动物有关的特征，并且这些特征在种群内通常变化很大。我们将利用黑芥菜（Brassica nigra）中的两个这样的性状来研究性状的遗传变异如何影响不同植物物种之间的相互作用。在我们的实验中，我们将操纵几组食草动物的存在或不存在，以确定它们如何影响植物物种之间的竞争结果。我们还将探讨黑芥子防御性状的遗传变异如何改变这种竞争结果。此外，遗传变异是自然选择的动力。因此，我们将研究这种遗传变异本身如何通过改变自然选择模式而受到生态群落的影响，例如植物或草食动物物种的多样性。这些关于物种内遗传变异之间相互作用以及复杂生态群落中物种之间相互作用的发现将为自然和农业系统中遗传多样性的管理提供重要见解。如果我们要准确预测随着遗传多样性持续下降，群落将如何变化，那么了解遗传变异在复杂群落内的相互作用中可能发挥的作用至关重要。