Dimensions US–China: Collaborative Research: Consequences of diversity in Asian and American oak syngameons for functional variation, adaptation and symbiont biodiversity
中美维度:合作研究:亚洲和美洲橡树合配体多样性对功能变异、适应和共生生物多样性的影响
基本信息
- 批准号:2129236
- 负责人:
- 金额:$ 13.66万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2021
- 资助国家:美国
- 起止时间:2021-10-15 至 2026-09-30
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
The world’s approximately 425 oak species maintain species identity even while exchanging genes with their close relatives through hybridization. This history of evolution and genetic exchange has shaped the biodiversity of northern hemisphere ecosystems. Oaks are ecologically diverse, with related species often growing in close proximity but specializing on areas of the forest landscape that differ in soil texture and moisture level or in the frequency of natural fires. Gene exchange can move such ecological specializations between oak species, broadening their ranges and ability to respond to climate change. The impacts of these genetic exchanges may extend beyond the oaks themselves. Oaks host an estimated 1000 gall wasp species worldwide and highly diverse communities of fungi associated with their roots (as mycorrhizae) and inside their leaves (as endophytes). Using paired field surveys and common garden experiments the PIs will evaluate the effects of hybridization and introgression on the genetic, phylogenetic, and functional diversity of focal oak species and their symbionts in the US and China. This work will also provide inquiry-based K-12, undergraduate, and graduate education; critical natural history training to the public through a community-science initiative in oak phenology; and publications that will bring research to public audiences.Two interdisciplinary teams of researchers, one based in the US and one in China, will investigate how genomic, functional, and phylogenetic diversity of oak trees shape the mycorrhizal fungi, endophytic fungi, and gall wasp and other insect communities that associate with them. Research will focus on two related groups of interbreeding species: bur oak (Quercus macrocarpa) and relatives in the US and bao li (Quercus serrata) and relatives in China. The project has three objectives, each conducted in parallel in China and the U.S. In Objective 1 the teams will perform range-wide phylogenomic surveys of natural populations to reconstruct genomic mosaics, characterize geographic patterns of leaf functional traits, and characterize functional and phylogenetic diversity of associated mycorrhizal fungi, leaf endophytic fungi, and gall wasps. In Objective 2 common gardens will be planted across climatic gradients to evaluate the effects of genetic variation and population differentiation on oak functional and spectral traits and relative fitness in different climates, and how these influence the phylogenetic and functional diversity of oak-associated fungal and insect communities. In Objective 3 the teams will use a second set of common garden experiments to evaluate how plant community and phylogenetic diversity affects focal oak species genetic, phylogenetic, and functional diversity. The project will provide an integrative perspective on how oak diversity within and among species impacts the broad diversity of oak-dominated ecosystems across the northern hemisphere.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
世界上大约有425种橡树,即使通过杂交与近亲交换基因,也保持着物种的同一性。这种进化和基因交换的历史塑造了北方生态系统的生物多样性。橡树具有生态多样性,相关物种通常生长在很近的地方,但专门生长在土壤质地和湿度或自然火灾频率不同的森林景观地区。基因交换可以在橡树物种之间移动这种生态专业化,扩大它们的范围和应对气候变化的能力。这些基因交换的影响可能超出了橡树本身。橡树在世界范围内估计有1000种瘿蜂,以及与它们的根(如真菌)和叶内(如内生菌)相关的高度多样化的真菌群落。使用配对的实地调查和常见的花园实验,PI将评估杂交和渐渗对美国和中国的重点橡树物种及其共生体的遗传,系统发育和功能多样性的影响。这项工作还将提供基于调查的K-12,本科和研究生教育;通过橡树物候学的社区科学倡议向公众提供关键的自然历史培训;以及将研究成果带给公众的出版物。两个跨学科研究团队,一个位于美国,一个位于中国,将研究橡树的基因组、功能和系统发育多样性如何塑造菌根真菌,内生真菌和瘿蜂以及与它们相关的其他昆虫群落。研究将集中在两个相关的杂交物种群体:美国的布尔橡树(Quercus macrocarpa)及其亲属和中国的宝丽栎(Quercus serrata)及其亲属。该项目有三个目标,每个目标在中国和美国平行进行。在目标1中,研究小组将对自然种群进行广泛的基因组调查,以重建基因组镶嵌,表征叶功能性状的地理模式,并表征相关菌根真菌,叶内生真菌和瘿蜂的功能和系统发育多样性。在目标2中,将种植跨越气候梯度的普通花园,以评估遗传变异和种群分化对不同气候条件下橡树功能和光谱特征以及相对适合度的影响,以及这些因素如何影响橡树相关真菌和昆虫群落的系统发育和功能多样性。在目标3中,研究小组将使用第二组常见的花园实验来评估植物群落和系统发育多样性如何影响主要橡树物种的遗传、系统发育和功能多样性。该项目将提供一个综合性的观点,如何橡树多样性内和物种之间的影响广泛多样性的橡树为主的生态系统在整个北方半球。该奖项反映了NSF的法定使命,并已被认为是值得的支持,通过评估使用基金会的知识价值和更广泛的影响审查标准。
项目成果
期刊论文数量(0)
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