Sedimentation switch of diatoms for new understandings in ocean chemistry
硅藻的沉积转换促进海洋化学的新认识
基本信息
- 批准号:23310008
- 负责人:
- 金额:$ 6.07万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2011
- 资助国家:日本
- 起止时间:2011-04-01 至 2014-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Diatom frustules tend to retain their chemical information when they form mega-aggregates. Using this property the chemical entity of diatom frustulea and chemical species of dissolved rare earth elements (REEs) in seawater are identified.1.Difference in individual frustule specimens was too great to allow clear discussion on dissolution kinetics./2.Diatom frustules contain terrigenous elements at concentrations of 1/100-1/10 that of terrigenous matter./3.A majority of REEs dissolve as silicic acid complexes in seawater and diatoms can absorb them to incorporate into frustules./4.Diatoms digest terrigenous silicates to incorporate into frustules./5.Most of organic matter in diatom frustules is readily decomposed during settlement and only less than 2% of it remains even when diatomaceous productivity is extremely high.
硅藻硅藻壳在形成大型聚集体时倾向于保留其化学信息。利用这一性质,对硅藻硅藻壳的化学实体和海水中溶解稀土元素的化学形态进行了鉴定。1.硅藻壳样品间的差异太大,不能清楚地讨论溶解动力学。2.硅藻硅藻壳中陆源元素的含量为陆源物质的1/100-1/10。3.大多数稀土元素以弱酸络合物的形式溶解于海水中,硅藻可以吸收它们并将其整合到硅藻壳中。4.硅藻消化陆源硅酸盐,将其并入硅藻壳。5.硅藻硅藻壳中的大部分有机质在沉降过程中很容易分解,即使在硅藻生产力极高的情况下,也只有不到2%的有机质保留下来。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
珪藻のデジタルアクションV太平洋の高いεNdは珪藻に由来する
太平洋硅藻V高εNd的数字作用源自硅藻
- DOI:
- 发表时间:2013
- 期刊:
- 影响因子:0
- 作者:赤木 右;安田早希;浅原良浩;江本真理子;高橋孝三
- 通讯作者:高橋孝三
ケイ藻生物ポンプのデジタルアクションIIケイ酸塩錯体のケイ藻による選択的取り込みが海洋表層の希土類元素濃度を決める
硅藻生物泵 II 的数字作用 硅藻对硅酸盐复合物的选择性吸收决定了海洋表层的稀土元素浓度
- DOI:
- 发表时间:2012
- 期刊:
- 影响因子:0
- 作者:山本博幸;他;山口一岩;赤木右
- 通讯作者:赤木右
Dissolved ion analyses of stream water from bamboo forests: Implication for enhancement of chemical weathering by bamboo
- DOI:10.2343/geochemj.1.0175
- 发表时间:2012-01-01
- 期刊:
- 影响因子:0.8
- 作者:Akagi, Tasuku;Hayashi, Misuzu;Sasaki, Shigeyuki
- 通讯作者:Sasaki, Shigeyuki
Rare earth element (REE)–silicic acid complexes in seawater to explain the incorporation of REEs in opal and the “leftover” REEs in surface water: New interpretation of dissolved REE distribution profiles
- DOI:10.1016/j.gca.2013.03.014
- 发表时间:2013-07
- 期刊:
- 影响因子:5
- 作者:T. Akagi
- 通讯作者:T. Akagi
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AKAGI Tasuku其他文献
AKAGI Tasuku的其他文献
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{{ truncateString('AKAGI Tasuku', 18)}}的其他基金
Exploration for a new paleoclimate proxy using fossil water in Sphagnum peat layers
利用泥炭层中的化石水探索新的古气候代理
- 批准号:
23654193 - 财政年份:2011
- 资助金额:
$ 6.07万 - 项目类别:
Grant-in-Aid for Challenging Exploratory Research
Reproduction of the atmospheric CO2 concentration of the past by analyzing carbon isotope ratio of sphagnum peat and the comparison with the sea-level variation
通过分析泥炭碳同位素比再现过去大气CO2浓度并与海平面变化进行比较
- 批准号:
18310008 - 财政年份:2006
- 资助金额:
$ 6.07万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Cultivation of diatoms using Tb-doped silicate minerals to characterize silicon utilized by diatoms
使用掺铽硅酸盐矿物培养硅藻以表征硅藻利用的硅
- 批准号:
12640477 - 财政年份:2000
- 资助金额:
$ 6.07万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Development of an analytical technique for isotopic ratio of carbon and oxygen in carbonates using a laser-probe method.
使用激光探针方法开发碳酸盐中碳和氧同位素比的分析技术。
- 批准号:
10640473 - 财政年份:1998
- 资助金额:
$ 6.07万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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