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Monitoring Carbonate Production and Degradation (Azores, Portugal)

监测碳酸盐的产生和降解（葡萄牙亚速尔群岛）

基本信息

批准号：
23691978
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：
2006
资助国家：
德国
起止时间：
2005-12-31 至 2010-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/23691978?language=en
关键词：
Monitoring Carbonate Production Degradation Azores

项目摘要

Studies on the various facies of the widespread cool-water carbonate factory in the N-Atlantic are far advanced, however, quantitative data on growth and degradation rates are almost lacking. This project focuses on the warm-temperate Azores Archipelago because of its remote location far from land, its poorly studied carbonate environment and because of the easy accessibility to a manned submersible at the island Faial. By covering a wide environmental gradient with respect to light regime and different water-mass properties along bathymetric transect (0-500m), we intend to carry out budgeting of carbonate-accretion and bioerosion rates with an experimental approach. Complementing, we aim for a detailed stable isotope analysis (¿ 18O and ¿ 13C) of selected long- living epibenthos (stylasterids, scleractinian corals and giant oysters) for growth-rate analyses and for the detection of subtle climate variability (e.g., NAO) in this area. The experiment comprises quantitative and qualitative monitoring of carbonate production and degradation as well as the recording of in situ environmental data (temperature, salinity and photosynthetically active radiation along with depth). The anticipated results are expected to yield (1) warm-temperate carbonateproduction and bioerosion rates, (2) enhanced insight in the suitability of stable isotopes for growth rate studies and high-resolution climate variability analyses, (3) knowledge on the bathymetric as well as biogeographic distribution of bioeroding and carbonate-accreting agents and (4) new insights in the relative contribution of boring organisms versus grazers on different substrate orientations to the process of bioerosion.

对北大西洋广泛分布的冷水碳酸盐工厂的各种相的研究已经取得了很大进展，然而，关于生长和降解速率的定量数据几乎缺乏。该项目将重点放在暖温带的亚速尔群岛，因为它地处偏远，远离陆地，对碳酸盐环境的研究很少，而且在Faial岛载人潜水器很容易到达。通过在水深样带（0-500m）覆盖光照条件和不同水质量性质的广泛环境梯度，我们打算用实验方法进行碳酸盐增生和生物侵蚀率的预算。作为补充，我们的目标是对选定的长寿的底栖动物（针类、硬核珊瑚和巨型牡蛎）进行详细的稳定同位素分析（¿18O和¿13C），以进行生长速度分析和探测该地区微妙的气候变化（例如NAO）。该实验包括对碳酸盐生产和降解进行定量和定性监测，以及记录现场环境数据（温度、盐度和光合有效辐射以及深度）。预期的结果有望产生(1)暖温带碳酸盐生产和生物侵蚀速率，(2)增强对稳定同位素在生长速率研究和高分辨率气候变率分析中的适用性的认识，(3)对生物侵蚀和碳酸盐增加剂的水深和生物地理分布有了新的认识；(4)对不同基质方向上的无聊生物和食草动物对生物侵蚀过程的相对贡献有了新的认识。