Development of environmental diagnostic indicators using compound-specific stable isotopic compositions for coastal marine ecosystems

使用沿海海洋生态系统的化合物特异性稳定同位素组合物开发环境诊断指标

• 批准号: 17510004
• 负责人: MIYAJIMA Toshihiro
• 金额: $ 1.41万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17510004/
• 关键词: Coastal marine environment; Elemental cycle; Ecosystem; Environmental indicator; Stable isotope ratio; Greenhouse gas; Seagrass beds; Mangrove; 海洋堆積物; 懸濁態有機物; 河口域; 人為起源栄養塩負荷

Use of stable isotopic signatures of carbon and nitrogen for assessing environmental stresses on coastal marine ecosystems has been elaborated in several different situations, among which three cases are described below.1.Emission of carbon dioxide from the estuarine mangrove swamps to coastal waters has been evaluated using longitudinal distribution of carbon stable isotope ratio (δ^<13>C) of dissolved inorganic carbon (DIC) along brackish areas. Mangrove-derived CO_2 was evaluated by deviation of measured δ^<13>C of DIC from conservative mixing model. this approach has been applied to two estuaries in Andaman coast of Thailand as well as to the Nagura estuary in Ishigaki Island, Japan. In all the estuaries examined, CO_2 input from the mangroves was successfully quantified and concentration of mangrove-derived DIC in the estuaries was up to 500μM.2.Stable carbon and nitrogen isotope ratios (δ^<213>C,δ^<15>N) of sedimentary organic mater have been used to evaluate the provenance of organic matter in coastal seagrass beds. Effects of sample preparation such as lyophilization and acid decarbonation on measured δ^<13>C and δ^<15>N were also thoroughly examined. δ^<13>C and δ^<15>N of seagrass bed sediments from Andaman coast evidenced input and accumulation of terrestrial organic carbon and waterwater-derived nitrogen in river-mouth seagrass beds.3.Contributions of seagrass-derived and terrestrial organic carbon to coastal sediments were evaluated using δ^<13>C of individual fatty acids. Our data suggested that the degree of accumulation of seagrass-derived carbon in sediments depend on species composition of seagrass that grew around the site.I have also a plan to publish an introductive book on stable isotope environmental indicators for aquatic ecosystems in the present fiscal year.

在几种不同的情况下已经阐述了碳和氮的稳定同位素特征来评估沿海海洋生态系统上的环境压力，其中有三种情况在下面描述了三种情况。1。二氧化碳从河口沼泽中的二氧化碳对沿海地区的延长范围的延长进行了评估。无机碳（DIC）沿咸淡的地区。红树林来源的CO_2通过测得的DIC的Δ^<13> C与保守混合模型的偏差进行了评估。这种方法已应用于泰国安达曼海岸的两名河口以及日本伊希加基岛的那古村河口。在所有检查的河口中，河口的CO_2输入均已成功量化，并且在河口中的红树林衍生的DIC浓度最高为500μm.2。稳定的有机物的碳和氮同位素比（Δ^^^^^^<213> c，δ^^<15> n）用于评估沿海的有机物。还彻底检查了样品制备对测量δ^<13> c和δ^<15> N的样品制备的影响。安达曼海岸的海草床沉积物的δ^^<13> n证明了河口海草床中的陆生有机碳和水衍生的氮的投入和积累。3。使用Δ^<13> c catives contentertions。我们的数据表明，在沉积物中，海草衍生的碳的积累程度取决于该地点周围生长的海草的物种组成。我还计划在当今财政年度出版有关稳定同位素环境指标的介绍者书籍。

项目成果

Temporal variability of stable carbon and nitrogen isotopic composition of size-fractionated particulate organic matter in the hypertrophic Sumida River Estuary of Tokyo Bay. Tapan.

东京湾肥厚隅田河口粒度分级颗粒有机物稳定碳氮同位素组成的时间变化。

• 发表时间: 2006
• 期刊: Estuarine, Coastal and Shelf Science 68
• 作者: Sato T;Miyajima T;他4名
• 通讯作者: 他4名

Distribution and partitioning of nitrogen and phosphorus in fringing reef lagoon of Ishigaki Island, Northwestern Pacific

西北太平洋石垣岛岸礁泻湖氮、磷的分布与分配

• 发表时间: 2007
• 期刊: Marine Ecology Progress Series (in press)
• 作者: Miyajima;T.;H.Hata;Y.Umezawa;H.Kayanne;I.Koike
• 通讯作者: I.Koike

Distribution and partitioning of nitrogen and phosphorus in a fringing reef lagoon of Ishigaki Island, Northwestern Pacific

西北太平洋石垣岛岸礁泻湖氮、磷的分布与分配

• 发表时间: 2007
• 期刊: Marine Ecology Progress Series (印刷中)
• 作者: Miyajima T;Hata T;他3名
• 通讯作者: 他3名

Temporal variability of stable carbon and nitrogen isotopic composition of size-fractionated particulate organic matter in...

尺寸分级颗粒有机物的稳定碳和氮同位素组成的时间变化...

• 发表时间: 2006
• 期刊: Estuarine, Coastal and Shelf Science (印刷中)
• 作者: Sato;T.;Miyajima;T.他3名
• 通讯作者: T.他3名

Variations in internal δ^<15>N and δ^<13>C distributions and their bulk value in the brown macroalga Padina australis growing in subtropical oligotrophic waters

亚热带贫营养水域棕色巨藻Padina australis内部δ^ 15 N和δ ^ 13 C分布的变化及其体积值

• 发表时间: 2007
• 期刊: Journal of Phycology 43(3)(in press)
• 作者: Umezawa;Y.;T.Miyajima;Y.Tanaka;I.Koike
• 通讯作者: I.Koike