Die Große Meteorbank (Nordost-Atlantik) - Trittstein oder Abstellgleis? Quantitative Unteruchungen zur Verbreitung, der Diversität und dem Ursprung der benthonischen Kuppenfauna

大流星河岸（东北大西洋）——垫脚石还是壁板？

• 批准号: 161751632
• 负责人: Dr. Kai Horst George
• 金额: --
• 依托单位: Deutsches Zentrum für Marine Biodiversitätsforschung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/161751632?language=en
• 关键词: Die; Gro; Meteorbank; Nordost; Atlantik

Because of their topography, size and location in the oceans, seamounts are considered as harbouring an enhanced biomass and diversity of “natural” and “genetic resources” compared with the surrounding deep sea. Thus, seamounts are of increasing economical interest. Nonetheless, after rather spot-like studies on seamounts in the past decades, recent investigations indicate, that such generalization of seamounts’ roles may not be justified. It remains quite unclear, why some seamounts present increasing species richness, high number of endemic species, and increased biomass production, while others do not. In the past, the Great Meteor Seamount, located in the northeast Atlantic, has several times been the object of mainly qualitative biological research. Although being insufficient for sound statements regarding taxa distribution, biogeography, and origin of the plateau fauna, the obtained datasets provide a basement for ongoing investigation. The proposed cruise aims a corresponding data capture. It is planned to test the following three hypotheses:1. Because of the strong isolation of the seamount it inhabits an autochthonous bottom fauna with a high portion of endemic species;2. Whereas those representatives of macro- and megabenthos that immigrate and live on the plateau may recruit from adjacent geographical regions and rather shallow areas, the meiobenthos of the plateau mainly originates from the surrounding deep sea;3. Due to the relatively high productivity of the Great Meteor Seamount compared with the surrounding deep sea, the seamount’s plateau shows a higher species density than the latter.

由于其在海洋中的地形、大小和位置，与周围的深海相比，海山被认为拥有更高的生物量和多样性，因此，海山的经济利益日益增加。最近的调查表明，过去几十年对海山的研究相当集中，这种对海山作用的概括可能并不合理。目前还不清楚为什么一些海山呈现出物种丰富度增加和特有数量增加的现象。过去，位于大西洋东北部的大流星海山多次成为主要定性生物研究的对象，尽管对于类群分布、生物地理学的合理陈述还不够。和高原动物群的起源，所获得的数据集为正在进行的调查提供了基础，计划测试以下三个假设：1。本土的具有较高比例的特有物种的海底动物群；2．在高原迁徙和生活的大型底栖动物和巨型底栖动物的代表中，高原的小型底栖动物主要来自周围的深海。 ;3.由于与周围深海相比，大流星海山的生产力相对较高，因此海山高原表现出比后者更高的物种密度。