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Microtaphonomy of organic materials at sediment-water interface-Experimental Research for establishing paleoenvitonmental proxies in consideration to microbial processes-

沉积物-水界面有机物质的微观埋藏学-考虑微生物过程建立古环境代理的实验研究-

基本信息

批准号：
14340156
负责人：
KITAZATO Hiroshi
金额：
$ 9.41万
依托单位：
Independent Administrative Institution, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Organic materials produced at sea surface are deposited on sea floor and are consumed by benthic organisms at Sediment-water Interface(SWI). This research aims to elucidate how micro-and meio-benthos consume organic materials at SWI through in situ and laboratory experiments.In situ experiments were conducted at the central part of Sagami Bay. Carbon 13 labeled single-celled phytoplankton (Dunaliella and Chaetoceros) and bacteria were supplied on sediment surface of feeding apparatus. In total, eight-set of apparatuses were situated on the sea floor. Three apperatuses were recovered every two days until 6 days have passed. Meiobenthos, both foraminifera and metazoan meiobenthos were picked under microscope in the laboratory. δ ^<13>C values of each species were measured with GC-mass spectrometer. Benthic foraminifera digested fresh food materials rapidly. Eighty to Ninety percentages of digested food materials are calculated to mineralize into carbon dioxide gas through respiration. Rests of them may assimilate into foraminiferal cell materials. Responses in food materials are different from species to species, in particular to each feeding behavior. Phytodetrital feeder should be most quick responder in comparison to deposit feeder. There are no specific bacteriovore among foraminiferal species that could analyze during this study.In situ measurements have also conducted at Sagami Bay center using both sensor microelectrode and planer optode systems that have assembled in lander system. A few millimeter to 1 cm thick oxygenated layer is developed at SWI. Two cm scale patchness of dissolved oxygen was observed at SWI. This may correspond well to 3D-distributional patterns of benthic foraminifera. We developed a highly sensitive optode film during this research. It can detect behaviors of benthic foraminifera at SWI.Through this research, we can conclude that foraminifera act a big role as primary consumer of organic materials at SWI.

海洋表面产生的有机物质沉积在海底，并被沉积物-水界面（SWI）的底栖生物消耗。本研究的目的是通过在相模湾中部进行的现场实验和室内实验，阐明小型底栖生物对有机物的消耗。在投饵器的底质表面投加碳13标记的单细胞浮游植物（杜氏藻和角毛藻）和细菌。总共有八套仪器位于海底。每两天回收三个装置，直到6天过去。在实验室显微镜下采集小型底栖动物，包括有孔虫和后生动物小型底栖动物。用<13>气相色谱-质谱联用仪测定各物种的δ ^ C值。底栖有孔虫消化新鲜食物的速度很快。80%至90%的消化食物通过呼吸作用矿化为二氧化碳气体。它们的剩余部分可能被同化为有孔虫细胞物质。不同物种对食物的反应不同，特别是对每种取食行为的反应。与存款饲养者相比，植物碎屑饲养者应该是最快的反应者。在本研究中，有孔虫种类中没有特定的食菌体可以分析。在相模湾中心，使用安装在着陆器系统中的传感器微电极和平面光电管系统进行了原位测量。在SWI形成几毫米到1厘米厚的氧化层。在SWI处观察到溶解氧的2 cm尺度斑块。这可能与底栖有孔虫的三维分布模式相对应。在本研究中，我们开发了一种高灵敏度的光电薄膜。通过本研究可以看出，在西南湾底栖有孔虫是有机物的主要消费者。

项目成果

期刊论文数量（43）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Kitazato, H.(ed.): "Long-term monitoring of Sedimentary Processes in Central Sagami Bay, Japan."Progress in Oceanography. 57・1. 1-128 (2003)

Kitazato, H.（编）：“日本相模湾中部沉积过程的长期监测”，海洋学进展 57・1（2003 年）。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

Kitazato, H. ほか10名: "Long-term monitoring of the sedimentary process at the central part of Sagami Bay, Japan: Rationale, logistics and overview of results"Progress in Oceanography. 57(in press). (2003)

Kitazato, H. 和其他 10 人：“日本相模湾中部沉积过程的长期监测：原理、逻辑和结果概述”海洋学进展 57（出版中）。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

Long-term monitoring of the sedimentary process at the central part of Sagami Bay, Japan : Rationale, logistics and overview of results.

日本相模湾中部沉积过程的长期监测：基本原理、逻辑和结果概述。

DOI：
发表时间：
2003
期刊：
Progress in oceanography 57
影响因子：
0
作者：
Kitazato;H.;Nakatsuka;T.;Shimanaga;M.;Kanda;J.;Soh;W.;Kato;Y.;Okada;Y.;Yamaoka;A.;Masuzawa;T.;Suzuki;K.;Shirayama;Y
通讯作者：
Y

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