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Spatial and temporal effects of anthropogenic carbon on bioerosion

人为碳对生物侵蚀的时空影响

基本信息

批准号：
69588163
负责人：
Professor Dr. André Freiwald
金额：
--
依托单位：
Abteilung Meeresforschung
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2008
资助国家：
德国
起止时间：
2007-12-31 至 2011-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/69588163?language=en
关键词：
Spatial temporal effects anthropogenic carbon

项目摘要

In the recent discussion how biotic systems may react to raised CO2 and temperatures in the marine realm, we will analyse the role of the most effective endolithic bioeroders - the boring sponges. Several hypotheses predict an increase of sponge-driven bioerosion along with weakening of the calcification potential of their hosts. In an integrated approach we will study interaction effects of global ocean acidification and climate change. Experiments will be conducted on bioeroding sponges as model organisms, because they have unique properties ideal for the planned research allowing simultaneous evaluation of different parameters: Symbiotic bioeroding sponges are likely to be affected by climate change and can be compared to both symbiotic reef builders and asymbiotic bioeroding sponges. Chemical etching of sponges is thought to be enhanced by ocean acidification. By using field sites in two marine environments in different climates (North Sea, tropical Pacific), results will provide a large-scale impression of spatial variation. A field survey at the previously established tropical site will allow a complementary temporal analysis and prognoses (presently for over 10 years). Employing experimental substrates with different solubility properties (aragonite, calcite), we will add another qualitative element. In total, data will convey critical insights into global trends of biologically caused decalcification.

在最近的讨论中，生物系统可能会对海洋领域的二氧化碳和温度升高做出反应，我们将分析最有效的石内生物侵蚀者-钻孔海绵的作用。几种假设预测随着宿主钙化潜力的减弱，海绵驱动的生物侵蚀沿着增加。我们将以综合方法研究全球海洋酸化和气候变化的相互作用影响。将对生物侵蚀海绵作为模式生物进行实验，因为它们具有独特的特性，非常适合计划中的研究，可以同时评估不同的参数：共生生物侵蚀海绵可能受到气候变化的影响，可以与共生造礁者和非共生生物侵蚀海绵进行比较。据认为，海洋酸化会加剧海绵的化学侵蚀。通过在两个不同气候的海洋环境（北海，热带太平洋）中使用现场站点，结果将提供一个大规模的空间变化的印象。在以前建立的热带地点进行实地调查，将能够进行补充的时间分析和预测（目前为10年以上）。采用实验基板具有不同的溶解度特性（文石，方解石），我们将添加另一个定性元素。总的来说，数据将传达对生物引起的脱钙全球趋势的重要见解。