Comparative analysis of rainforest-savanna biome shifts and spatio-temporal diversification patterns in Old- and New World savanna lineages in Ochnaceae (Malpighiales)

龙科植物（Malpighiales）是热带雨林和热带稀树草原的重要组成部分，是研究热带稀树草原谱系演化及其驱动因素和多样性时空格局的重要模型类群，是研究热带雨林和热带稀树草原生物群落变化的重要模型类群，也是研究热带雨林和热带稀树草原生物群落变化的重要模型类群，也是研究热带雨林和热带稀树草原生物群落多样性动态的重要模型类群。(4)分析了火适应（如土氧、深裂、软木树皮）在稀树草原世系进化和辐射中的作用。利用系统发育学方法（目标序列捕获），将解决系统发育重建中仍然存在的弱点，以及解决家族中尚未解决的系统问题。由此获得的基于聚结的系统发育重建是上述具有更广泛意义的比较分析的基础。广泛的前期工作、方法学专业知识、建立良好的世界范围内的相关龙科研究人员网络、手头的良好采样和成功应用的方法来保证从植物标本馆收集的广泛采样是确保项目可行性的重要先决条件。

Ochnaceae s.l. (Malpighiales) are an important element of tropical rain forests and savannas worldwide and, based on recent studies, qualify as an excellent model group to (1) investigate the evolution of savanna lineages, the relevant drivers and the spatio-temporal patterns of diversification, (2) study biome shifts between rain forest and savanna, (3) comparatively analyse the diversification dynamics of savanna lineages in the Neotropics and Paleotropics within a monophyletic group, and (4) analyse the role of fire-adaptations (e.g. geoxyly; deeply fissured, corky bark) for the evolution and radiation of savanna lineages. Using a phylogenomic approach (targeted sequence capture), still existing weaknesses in the phylogenetic reconstruction will be solved as well as open systematic questions in the family settled. The thus obtained coalescence-based reconstructions of phylogeny are the basis for the above mentioned comparative analysis of broader interest. Extensive preliminary work, methodological expertise, a well established worldwide network of relevant Ochnaceae researchers, good sampling at hand and methods successfully applied to guarantee extensive sampling from herbarium collections are important prerequisites to ensure the feasibility of the project.