High-resolution species biogeography of Larger Benthic Foraminifera from Raja Ampat (Indonesia) and the Indo-Pacific Ocean

四王群岛（印度尼西亚）和印度太平洋大型底栖有孔虫的高分辨率物种生物地理学

• 批准号: 270955015
• 负责人: Professor Dr. Martin Langer
• 金额: --
• 依托单位: Abteilung Paläontologie
• 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 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/270955015?language=en
• 关键词: resolution; species; biogeography; Larger; Benthic

The Coral Triangle in the central Indo-Pacific is the hotspot for tropical marine biodiversity and has the worlds highest conservation priorities. Tropical marine biodiversity hotspots are moving through time and space and always coincide with major tectonic plate collisions, but the underlying evolutionary processes that promote species richness are still a matter of debate and in need of further investigations. Reef dwelling larger benthic foraminifera (LBF) are perfect proxy organisms for reefal development, diversity and evolution and are prominent ecosystem engineers involved in reef building and stability.This proposal is for the support of a 1 year project on high-resolution species biogeography of LBF from the Indo-Pacific as part of a PhD study on the extremely high diverse assemblages of benthic foraminifera from Raja Ampat (Indonesia). The study is the first large-scale foraminiferal study in this virtually unexplored region and therefore fills an important biogeographic gap of knowledge concerning processes generating species richness. It has been previously funded by a scholarship of the University of Bonn, that is limited for 2 years. During these 2 years we examined a) the foraminiferal species richness of assemblages from Raja Ampat, b) established a full documentation of the reefal faunal assemblages by scanning electron microscopy, and c) assessed the role of benthic foraminifera as ecosystem engineers. So far our results exhibit an extraordinary high species richness of both smaller and larger benthic taxa and give rise to the following new objectives, which will be worked on in the final year of this PhD research project: (1) Investigation of large-scale patterns of LBF species richness for the Indian and the Pacific Ocean and elaboration of a diversity gradient on species level for LBF to offer an updated high-resolution picture which includes the hotspot of tropical marine diversity for the first time, and comparison of our results to species-level biogeography patterns of scleractinian corals. (2) Revealing faunal similarities between the central Indo-Pacific benthic foraminiferal fauna and those of the Indian and Pacific Ocean. Thereby we expect to find support for one of the hypotheses concerning the processes generating species richness in the central Indo-Pacific.

位于印度-太平洋中部的珊瑚三角是热带海洋生物多样性的热点，具有世界上最高的保护优先事项。热带海洋生物多样性热点正在穿越时空，总是与主要的构造板块碰撞重合，但促进物种丰富的潜在演化过程仍然是一个有争议的问题，需要进一步研究。珊瑚礁栖息的大型底栖有孔虫(LBF)是珊瑚礁发育、多样性和进化的完美替代生物，是参与珊瑚礁建设和稳定的杰出生态工程师。这项建议是为了支持一项为期一年的项目，该项目是印度-太平洋地区LBF高分辨率物种生物地理学项目的一部分，该项目是对印度尼西亚Raja Ampat的底栖有孔虫极高多样性组合的博士研究的一部分。这项研究是在这一几乎未被探索的地区进行的第一次大规模有孔虫研究，因此填补了关于产生物种丰富的过程的重要生物地理知识空白。它之前是由波恩大学的奖学金资助的，期限为2年。在这两年中，我们研究了a)Raja Ampat生物组合中丰富的有孔虫物种，b)通过扫描电子显微镜建立了珊瑚礁动物组合的完整文件，以及c)评估了底栖有孔虫作为生态系统工程师的作用。到目前为止，我们的结果显示了较小和较大海底类群的极高物种丰富度，并产生了以下新目标，将在本博士研究项目的最后一年进行：(1)调查印度洋和太平洋LBF物种丰富度的大规模模式，阐述LBF物种水平的多样性梯度，以提供第一次包括热带海洋多样性热点的最新高分辨率图像，并将我们的结果与珊瑚物种水平的生物地理模式进行比较。(2)揭示了印度-太平洋中部底栖有孔虫动物群与印度洋和太平洋底栖有孔虫动物群的相似性。因此，我们期望找到关于在印度-太平洋中部产生物种丰富的过程的一个假设的支持。