The role of salt marsh structure in the distribution of surface sedimentary organic matter
The role of salt marsh structure in the distribution of surface sedimentary organic matter
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盐沼结构在表层沉积有机质分布中的作用
DOI:
10.1007/s12237-015-9957-z
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发表时间:
2015
影响因子:
2.7
通讯作者:
Miguel A. Goñi
中科院分区:
文献类型:
--
作者:
Si Chen;Raymond Torres;Miguel A. Goñi
This study examines spatial variability in sedimentary.organic matter (OM). A total of 25 surface sediment samples.were analyzed from two transects across a 0.5-km2 salt.marsh island; one transect traverses relatively old marsh and.the other a mix of old and new marsh. We use elevation and.distance to creek head as geomorphic proxies and associate.them with the abundance (carbon, nitrogen) and the isotopic/.molecular composition of organic constituents (i.e., lignin)..Statistically significant linear correlations were observed between.elevation and distance from the creek head with OM.content, suggesting a likely geomorphic influence. However,.the trend was positive for the older marsh and negative for the.new marsh. Hence, sediment sampling at or near levees can.give rise to a factor of 5–8 difference in OM content. Also,.opposing trends were observed in OM provenance with old.marsh having greater contributions of marine algae or allochthonous.OM and new marsh having a predominantly autochthonous.OMsignature. Further, these data reveal two scales of.variability inOM content and composition, one at ~101 m and.the other at ~103 m. We ascribe the 101-m scale variability to.the effect of salt marsh geomorphic structure, while the 103-m.scale variability is likely related to the differences in local.nutrient input and OM preservation and due to sediment.source and accumulation rates and processes between sites.
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DOI:
10.25773/v5-rx1a-w025
发表时间:
2007
期刊:
--
影响因子:
--
作者:
L. LeMay
通讯作者:
L. LeMay
影响因子:
4.6
作者:
M. Beck;H. Brumsack
通讯作者:
M. Beck;H. Brumsack
影响因子:
4.5
作者:
Hunsinger, Glendon B.;Mitra, Siddhartha;Fischer, David T.
通讯作者:
Fischer, David T.
影响因子:
5.2
作者:
F. Zehetner;G. Lair;M. Gerzabek
通讯作者:
F. Zehetner;G. Lair;M. Gerzabek
影响因子:
2.8
作者:
Xuchen Wang;Robert F. Chen;A. Berry
通讯作者:
Xuchen Wang;Robert F. Chen;A. Berry