DISSERTATION RESEARCH: Comparative phylogeography of three co-distributed Neotropical mangrove species

论文研究：三种共同分布的新热带红树林物种的比较系统发育地理学

• 批准号: 1501600
• 负责人: Douglas Soltis
• 金额: $ 1.95万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1501600&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Comparative; phylogeography; three

Mangroves provide valuable ecosystem services and habitats for many economically important animals, such as fish, birds, and marine invertebrates. Red (Rhizophora mangle), black (Avicennia germinans), and white (Laguncularia racemosa) mangroves are coastal trees found in estuarine habitats throughout the Neotropics. This project will use genetic tools, evolutionary analyses and niche modeling to analyze current distributions, and then use these data to model past and future geographical distributions for the three species. The project will also investigate the correlation between dispersal ability and observed patterns of genetic diversity, and infer how seed dispersal potential can affect the genetic structure of populations on broad geographic scales. One graduate student will be trained in diverse molecular methods, niche modeling and phylogenetic analyses, and undergraduates will be introduced to a diversity of field and laboratory techniques. A series of talks and presentations will broadly disseminate results of the study in Florida, Aruba, Cayman Islands, and Jamaica where the three mangrove species will be collected. The comparative phylogeography of coastal and marine animals in the southeastern U. S. has been well studied, with many taxa exhibiting a phylogeographic discontinuity at the southern tip of Florida. In contrast, only two studies have examined the phylogeography of coastal or marine plant species in this region. In the Caribbean, studies of historical biogeography have similarly been heavily biased towards vertebrates. Further study of coastal plants is needed in Florida and the Caribbean to facilitate phylogeographic synthesis for the region. The researchers will investigate the phylogeographic histories of three mangrove species (Rhizophora mangle, Avicennia germinans, and Laguncularia racemosa) in Florida. They will test the hypothesis that phylogeographic structure is less pronounced in these highly dispersed organisms than in other coastal organisms, and that propagule size, longevity and proximity to water will be negatively correlated with phylogeographic structure. To help place these patterns in a broader context, the researchers will also investigate the phylogeography of R. mangle in the Caribbean. This project will use multiple molecular markers, including complete plastid genomes, RAD-Seq data, and microsatellites, each with different modes of inheritance and mutation rates, to thoroughly investigate the phylogeography of these three species. Data obtained will facilitate a synthesis of animal and plant phylogeographic and biogeographic studies in Florida and the Caribbean, and also help identify future conservation priorities in the different areas.

红树林为许多经济重要的动物（例如鱼类，鸟类和海洋无脊椎动物）提供宝贵的生态系统服务和栖息地。 红色（Rhizophora Mangle），黑色（Avicennia Germinans）和White（Laguncularia racemosa）红树林是整个新型新近新型河口栖息地中发现的沿海树。该项目将使用遗传工具，进化分析和利基建模来分析当前的分布，然后使用这些数据对三种物种的过去和将来的地理分布进行建模。 该项目还将研究分散能力与观察到的遗传多样性模式之间的相关性，并推断种子分散潜力如何影响广泛地理位置上种群的遗传结构。 一名研究生将接受各种分子方法，利基建模和系统发育分析的培训，并将在本科生中引入多种现场和实验室技术。 一系列的演讲和演讲将在佛罗里达，阿鲁巴，开曼群岛和牙买加的研究结果中广泛传播，其中将收集三个红树林。对美国东南部的沿海和海洋动物的比较植物地理学进行了很好的研究，许多分类单元在佛罗里达州南端表现出植物地理学的不连续性。 相比之下，只有两项研究检查了该地区沿海或海洋植物物种的植物地理学。 在加勒比海地区，对历史生物地理学的研究同样对脊椎动物有着严重的偏见。 需要进一步研究佛罗里达州和加勒比海的沿海植物，以促进该地区的植物地理综合。 研究人员将研究佛罗里达州三个红树林物种（Rhizophora Mangle，Avicennia Germinans和Laguncularia racemosa）的植物地理学历史。 他们将检验以下假设：在这些高度分散的生物中，植物地理结构与其他沿海生物相比，繁殖体的大小，寿命和与水接近的繁殖量将与植物地理结构负相关。 为了帮助将这些模式放在更广泛的背景下，研究人员还将研究加勒比海中的R. Mangle的植物地理学。 该项目将使用多个分子标记物，包括完整的质体基因组，rad-seq数据和微卫星，每种都具有不同的遗传和突变速率，以彻底研究这三个物种的植物地理学。 获得的数据将促进佛罗里达州和加勒比海的动物和植物植物地理学和生物地理研究的合成，还有助于确定不同地区的未来保护优先级。