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The role of sympagic meiofauna for the flow of organic matter and energy in the Antarctic and Arctic sea-ice foodwebs

共生小型底栖动物对南极和北极海冰食物网有机质和能量流动的作用

基本信息

批准号：
44335584
负责人：
Dr. Iris Werner
金额：
--
依托单位：
Abteilung Ökosystemforschung, Geoarchäologie und Polarökologie
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2007
资助国家：
德国
起止时间：
2006-12-31 至 2010-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/44335584?language=en
关键词：
role sympagic meiofauna flow organic

项目摘要

The brine channels in sea ice of both polar regions are the habitat of sympagic (iceassociated) bacteria, algae, protozoans and small metazoans (meiofauna), including copepods, plathyelminthes, rotifers, nematodes, cnidarians, nudibranchs and ctenophores. Primary production of sympagic algae forms the basis of the sea-ice food web, which is coupled to the pelagic ecosystem and higher trophic levels. This project aims to determine the, as yet unknown, role of sympagic meiofauna for the flow of organic matter and energy through the sea-ice food web. The questions raised are: What are the major food sources of the dominant sympagic meiofauna taxa? What are the ingestion rates, and what is the functional relationship to density of food and grazers / predators? What is the grazing and predation impact with different community compositions? How are the dynamics of the sympagic community influenced by sympagic meiofauna? These questions are addressed by a combination of gut content analyses, biochemical analyses, feeding experiments and modelling. The results will contribute to the understanding of the functional ecology of ice-covered ocean ecosystems.

两极海冰中的盐水通道是同生（冰相关）细菌、藻类、原生动物和小型后生动物（减数动物）的栖息地，包括桡足类、类动物、轮虫、线虫、针孔动物、裸鳃动物和栉水母。同生藻类的初级生产形成了海冰食物网的基础，它与远洋生态系统和更高的营养水平相结合。这个项目的目的是确定，到目前为止，还不为人知的，在海洋冰食物网的有机物质和能量的流动中，同生微动物的作用。提出的问题是：占优势的同生小型动物类群的主要食物来源是什么？摄食率是多少？与食物密度和食草动物/捕食者的功能关系是什么？不同群落组成对放牧和捕食的影响是什么？同生小动物如何影响同生群落的动态？这些问题将通过肠道内容物分析、生化分析、饲养实验和建模相结合来解决。研究结果将有助于认识冰覆盖海洋生态系统的功能生态学。