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首页> 外文期刊>Estuarine Coastal and Shelf Science >Spatial distribution of phosphorus speciation in marsh sediments along a hydrologic gradient in a subtropical estuarine wetland, China
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Spatial distribution of phosphorus speciation in marsh sediments along a hydrologic gradient in a subtropical estuarine wetland, China

机译：亚热带河口湿地湿地沉积物磷形态分布沿水文梯度的空间分布

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摘要

In May and August 2013, a 360-m long transect (from a high to a middle tidal flat) was laid out in the Min River estuarine marsh to study the distribution of total phosphorus (TP) and its fractions (i.e., organic P (Org P), inorganic P (IP), aluminum-bound P (Al-P), iron-bound P (Fe-P), occluded P (O-P), and calcium-bound P (Ca-P)). The results showed that TP concentrations of the sediments ranged from 338 to 846 mg kg(-1) (average 664 mg kg(-1)) in May and from 353 to 932 mg kg(-1) (average 657 mg kg(-1)) in August. IP dominated the P fractions (accounting for 57-81% of TP) and was mainly composed of Fe-P (38%), O-P (30%), and Ca-P (25%). The TP, IP and Fe-P concentrations fluctuated along the hydrologic gradient during both measurement periods (except for the upper 10-cm sediments in August). Meanwhile, their concentrations decreased with depth (0-50 cm), but vertical variation declined in the middle tidal flat. A higher concentration of Org P was observed in the upper 20-cm sediments of the high tidal flat. The concentrations of Ca-P and Al-P increased from the high tidal flat to the middle tidal flat, but there was no significant difference between sediment layers (P > 0.05). The O-P concentration was significantly higher in Phragmites australis sediments compared with Cyperus malaccensis sediments (P < 0.05). Based on the space-for-time substitution rule, we predict that sea-level change will likely alter the composition and vertical distribution of TP in the Min River estuarine sediments. (C) 2014 Elsevier Ltd. All rights reserved.
机译：2013年5月和2013年8月，在the江河口沼泽地上铺设了一条360米长的样带（从高潮滩到中潮滩），研究了总磷（TP）及其分数（即有机P（ Org P），无机P（IP），铝结合P（Al-P），铁结合P（Fe-P），闭塞P（OP）和钙结合P（Ca-P））。结果显示，5月沉积物的TP浓度范围为338至846 mg kg（-1）（平均664 mg kg（-1）），而353至932 mg kg（-1）（平均657 mg kg（-） 1））。 IP占P的大部分（占TP的57-81％），主要由Fe-P（38％），O-P（30％）和Ca-P（25％）组成。 TP，IP和Fe-P的浓度在两个测量期间均沿水文梯度波动（8月份上部10厘米的沉积物除外）。同时，它们的浓度随深度（0-50厘米）而降低，但中潮滩的垂直变化减小。在高潮滩的上部20 cm沉积物中观察到较高的Org P浓度。 Ca-P和Al-P的浓度从高潮滩向中潮滩增加，但各沉积物层之间无显着差异（P> 0.05）。芦苇沉积物中的O-P浓度显着高于马六丁香沉积物（P <0.05）。基于时空置换规则，我们预测海平面变化将可能改变the江口沉积物中总磷的组成和垂直分布。 （C）2014 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2015年第5期|30-38|共9页
  • 作者

    Zhang Wen-Long; Zeng Cong-Sheng; Tong Chuan; Zhai Shui-Jing; Lin Xiao; Gao Deng-Zhou;

  • 作者单位

    Fujian Normal Univ, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China|Fujian Normal Univ, Res Ctr Wetlands Subtrop Reg, Fuzhou 350007, Peoples R China;

    Fujian Normal Univ, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China|Fujian Normal Univ, Res Ctr Wetlands Subtrop Reg, Fuzhou 350007, Peoples R China;

    Fujian Normal Univ, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China|Fujian Normal Univ, Res Ctr Wetlands Subtrop Reg, Fuzhou 350007, Peoples R China;

    Fujian Normal Univ, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China|Fujian Normal Univ, Res Ctr Wetlands Subtrop Reg, Fuzhou 350007, Peoples R China;

    Fujian Normal Univ, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China|Fujian Normal Univ, Res Ctr Wetlands Subtrop Reg, Fuzhou 350007, Peoples R China;

    Fujian Normal Univ, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China|Fujian Normal Univ, Res Ctr Wetlands Subtrop Reg, Fuzhou 350007, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    spatial pattern; inundation frequency; Min River Estuary; phosphorus speciation; sea-level change;

    机译：空间格局;淹没频率;Min河口;磷形态;海平面变化;

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