Dynamik benthischer Ökosystemfunktionen in Abhängigkeit des Schelfeis-Zerfalls im westlichen Weddellmeer

威德尔海西部海底生态系统功能随冰架衰退的动态变化

• 批准号: 238058495
• 负责人: Dr. Heike Link
• 金额: --
• 依托单位: Fachbereich Biowissenschaften
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/238058495?language=en
• 关键词: Dynamik; benthischer; kosystemfunktionen; Abh; ngigkeit

The Larsen ice shelves east of the Antarctic Peninsula have been retreating rapidly, thus subjecting the manne ecosystem of the western Weddell Sea (Larsen areas A and B) to dramatic changes in environmental conditions: open water allows for higher primary production, higher export of organic matter to the seafloor, and äs a consequence, the seabed has been recolonized at many sites by rieh benthic communities. These differ frorn the impoverished assemblages found in oligotrophic conditions under the ice shelves, which raises the question, how the pronounced changes in benthic food supply and community composition may have influenced benthic ecosystem functioning (BEF)? Important BEF components are the degradation of organic matter and the associated remineralization of carbon and inorganic nutrients. Little is known about this issue in polar regions, and even less how these benthic processes have and will change in response to the continuing retreat of Antarctic ice shelves. This project therefore aims to (1) give a first quantification and (2) determine changes of benthic boundary fluxes on the Larsen shelf after loss of ice shelves (A and B) related to changes in organic matter on the seabed and community composition and (3) evaluate future changes of benthic boundary fluxes on the entire Larsen shelf (A, B, and C) using an experimental approach. As part of the 'Larsen Shelf Study of the Ocean' (LASSO), the outcome of this project will lead to a conceptual model describing the effects of ice shelf retreat on the benthic ecosystems in the Larsen region.

南极半岛东部的拉森冰架正在迅速后退，从而使威德尔海西部（拉森 A 区和 B 区）的曼恩生态系统遭受环境条件的巨大变化：开放水域允许更高的初级生产、更多的有机产品出口海底生物群落在许多地方重新定居，这些群落与冰下贫营养条件下的贫瘠组合不同。这就提出了一个问题，底栖食物供应和群落组成的显着变化如何影响底栖生态系统功能（BEF）？关于极地地区的这个问题，更不用说这些海底过程已经并将如何因南极冰架的持续退缩而发生变化，因此该项目的目的是（1）进行首次量化和（2）确定南极冰架的变化。冰架消失后拉森大陆架的底栖边界通量（A和B）与海底有机质和群落组成的变化有关，（3）评估整个拉森大陆架底栖边界通量的未来变化（A，B， C) 作为“拉森大陆架海洋研究”（LASSO）的一部分，该项目的成果将产生一个概念模型，描述冰架退缩对拉森海底生态系统的影响。地区。

项目成果

Leben am Meeresboden

海底的生活

• DOI: 10.1007/978-3-662-49714-2_19
• 发表时间: 2017
• 作者: Piepenburg; D.; Br;t; A.; Juterzenka; K. v.; Link; H.; Arbizu; P. M.; Schmid; M.; Thomsen; L. & Veit
• 通讯作者: L. & Veit

Trait-based approaches in rapidly changing ecosystems: A roadmap to the future polar oceans

快速变化的生态系统中基于特征的方法：未来极地海洋的路线图

• DOI: 10.1016/j.ecolind.2018.04.050
• 发表时间: 2018-08-01
• 期刊: Ecological Indicators
• 影响因子: 6.9
• 作者: R. Degen;Magnus Aune;B. Bluhm;Camilla Cassidy;M. Kȩdra;C. Kraan;L. V;epitte;epitte;M. Włodarska‐Kowalczuk;I. Zhulay;P. Albano;J. Bremner;J. Grebmeier;H. Link;N. Morata;M. Nordström;M. Shojaei;Lauren Sutton;M. Zuschin
• 通讯作者: M. Zuschin

Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula

南极半岛北部大陆架海鞘类（Ascidiacea：Tunicata）的空间分布格局

• DOI: 10.1007/s00300-016-1909-y
• 发表时间: 2016
• 期刊: Polar Biology
• 影响因子: 1.7
• 作者: Segelken