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

Late Palaeozoic Tetrapod Biogeography

晚古生代四足动物生物地理学

基本信息

批准号：
264294766
负责人：
Professor Dr. Jörg Fröbisch, Ph.D.
金额：
--
依托单位：
Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung (MfN)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/264294766?language=en
关键词：
Late Palaeozoic Tetrapod Biogeography

项目摘要

The late Palaeozoic represents a crucial period in the development and organisation of terrestrial vertebrate ecosystems. It was at this time that more complex community structures with intricate trophic hierarchies were established in the terrestrial realm. Moreover, the earliest evolution and diversification of amniotes (fully terrestrial tetrapods) occurred with the bifurcation into the two lineages: Synapsida (including mammals) and Sauropsida (including reptiles and birds). Late Carboniferous and Early Permian ecosystems were mostly centred on waterside habitats in a humid equatorial tropical belt. However, towards the end of the Early Permian, substantial changes in terrestrial environments began with the deglaciation of the ice cap at the South Pole leading to climate changes such as the reduction and eventual loss of the tropical everwet belt. Along with this, terrestrial ecosystems for the first time expanded away from the palaeoequatorial regions and into the higher latitude seasonal temperate regions. Although these biogeographic patterns are known, they have never been investigated in a rigorous quantitative framework. The proposed study will test certain hypotheses regarding the early patterns of tetrapod biogeography with cladistic biogeographic methods. For this purpose, selected critical tetrapod taxa from Russia and North America will be taxonomically re-evaluated and included into global phylogenetic analyses to examine the relationships of basal amniotes. In addition, an existing database of tetrapod specimens from the Karoo Basin of South Africa will be updated. Further quantitative analyses will be carried out on both local and global databases to investigate provinciality within and between basins, and the changes in faunal homogeneity through geological time. The results of this research will have important implications for understanding the early biogeographic history of tetrapods and specifically the fully terrestrial amniotes.

晚古生代是陆地脊椎动物生态系统发展和组织的关键时期。正是在这个时候，陆地领域建立了更复杂的群落结构，具有复杂的营养等级。此外，羊栖类(全陆栖四足动物)最早的进化和多样化发生在分成两个谱系：突触目(包括哺乳动物)和索罗普西达(包括爬行动物和鸟类)。晚石炭世和早二叠世生态系统主要集中在赤道热带潮湿地带的水边生境。然而，在早二叠世末期，随着南极冰盖的消融导致气候变化，例如热带常湿带的减少和最终消失，陆地环境开始发生重大变化。随之而来的是，陆地生态系统首次从古赤道地区扩展到更高纬度的季节性温带地区。尽管这些生物地理模式是已知的，但它们从未在严格的量化框架中被研究过。这项拟议的研究将用分支生物地理学方法检验关于四足动物生物地理学早期模式的某些假设。为此目的，将对来自俄罗斯和北美的关键四足类进行重新分类评估，并将其纳入全球系统发育分析，以研究基础羊膜动物之间的关系。此外，将更新南非卡鲁盆地现有的四足动物标本数据库。将在当地和全球数据库上进行进一步的量化分析，以调查盆地内和盆地之间的地区性，以及动物群均一性随地质时间的变化。这项研究的结果将对了解四足动物，特别是全陆地羊膜动物的早期生物地理史具有重要意义。