The effect of vegetation height and biomass on the sediment budget of a European saltmarsh
The effect of vegetation height and biomass on the sediment budget of a European saltmarsh
复制标题
植被高度和生物量对欧洲盐沼沉积物收支的影响
DOI：
10.1016/j.ecss.2017.12.016
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发表时间：
2018
影响因子：
2.8
通讯作者：
Spencer
中科院分区：
文献类型：
--
作者：
Schuerch;Christie;Möller;Spencer
泥沙在盐沼中的滞留通常归因于植被的存在，植被通过减缓水流来增强沉积，通过衰减波能来减少侵蚀，并通过有机物的存在来增加表面的稳定性。盐沼植被形态在空间和时间尺度上差异很大，但不同的地上形态对沉积物滞留的影响并不是很好的特征。对于改进海岸线数值模型，了解植被与泥沙捕集之间的生物物理相互作用是非常重要的。在一项新的现场水槽研究中，我们使用质量平衡方法测量了植被高度和生物量对泥沙捕获的影响。悬浮物剖面仪安装在英国登基半岛潮间带盐沼向海边界上建造的跨岸水槽的两个开口处。从水槽中顺序移除植物材料会导致植被高度和生物量的递增损失。每台剖面仪测得的悬浮泥沙浓度之差被用来确定水槽内的泥沙平衡。洪水期间物质沉积在水槽内的植物/土壤表面，而落潮则导致水槽区域的侵蚀(程度较轻)，平均正泥沙收支为6.5g m−2tide−1，泥沙截留效率与林冠形态没有显著关系。淤积(和侵蚀)速率与最大淹没深度呈正相关。我们的结果表明，在平静的条件下，树冠形态的变化不会导致沼泽沉积物收支的显著变化。
Sediment retention in saltmarshes is often attributed to the presence of vegetation, which enhances accretion by slowing water flow, reduces erosion by attenuating wave energy and increases surface stability through the presence of organic matter. Saltmarsh vegetation morphology varies considerably on a range of spatial and temporal scales, but the effect of different above ground morphologies on sediment retention is not well characterised. Understanding the biophysical interaction between the canopy and sediment trappingin situis important for improving numerical shoreline models. In a novel field flume study, we measured the effect of vegetation height and biomass on sediment trapping using a mass balance approach. Suspended sediment profilers were placed at both openings of a field flume built across-shore on the seaward boundary of an intertidal saltmarsh in the Dengie Peninsula, UK. Sequential removal of plant material from within the flume resulted in incremental loss of vegetation height and biomass. The difference between the concentration of suspended sediment measured at each profiler was used to determine the sediment budget within the flume. Deposition of material on the plant/soil surfaces within the flume occurred during flood tides, while ebb flow resulted in erosion (to a lesser degree) from the flume area, with a positive sediment budget of on average 6.5 g m−2tide−1with no significant relationship between sediment trapping efficiency and canopy morphology. Deposition (and erosion) rates were positively correlated to maximum inundation depth. Our results suggest that during periods of calm conditions, changes to canopy morphology do not result in significant changes in sediment budgets in marshes.
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退缩的沿海盐沼中的沉积物动力学和沉积
影响因子：
2.8
作者：
D. Reed
通讯作者：
D. Reed
影响因子：
--
作者：
I. Möller;T. Spencer
通讯作者：
I. Möller;T. Spencer
DOI：
10.1007/bf00048149
发表时间：
1993-01-01
期刊：
VEGETATIO
影响因子：
--
作者：
ARP, WJ;DRAKE, BG;WHIGHAM, DF
通讯作者：
WHIGHAM, DF
牲畜放牧是否会影响盐沼中的沉积物沉积和增生率
影响因子：
2.8
作者：
S. Nolte;F. Müller;M. Schuerch;A. Wanner;P. Esselink;J. Bakker;K. Jensen
通讯作者：
K. Jensen
1988年和1989年北海南部温度、盐度、营养盐和悬浮沉积物的季节变化
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
D. Prandle;D. Hydes;J. Jarvis;J. McManus
通讯作者：
J. McManus