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首页> 外文期刊>Estuarine Coastal and Shelf Science >Species specific effects of three morphologically different belowground seagrasses on sediment properties
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Species specific effects of three morphologically different belowground seagrasses on sediment properties

机译：三种形态上不同的地下海草对沉积物性质的物种特异性影响

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Roots and rhizomes of seagrass play an important role in coastline zone by anchoring the substrate firmly which prevent resuspension and also controlling sediment biogeochemistry. The aim of this study was to compare the physical and chemical differences of sediments for 3 seagrass species, which have different root morphology between summer (February 2013) and the monsoon month (September 2013). Seven seagrass communities were studied and are: the mono stand of Halophila ovalis, Thalassia hemprichii, and Cymodocea rotundata, the mixed patches of H. ovalis with T. hemprichii, H. ovalis with C. rotundata, and hemprichii with C rotundata and the mixed patches of 3 seagrass species. The roots of seagrasses were the main driver of differences in sediment properties; the branched, long root species, C. rotundata, showed an increasing redox potential by means of oxygen releasing from their roots. The unbranched, long root with dense root hair species, T. hemprichii, tended to cause more poorly sorted sediments. The carbon storage was also estimated and results showed a trend of higher organic carbon density was in the multispecific patches, the mono specific patches and bare sand, respectively. Season also influenced the sediment properties; high wave action in the monsoon stirred up the sediments, this led to lower organic carbon density and high redox potential. Our results suggest that the roots of seagrass species both increase and decrease sediment properties. (c) 2015 Elsevier Ltd. All rights reserved.
机译：海草的根和根茎在海岸线上起着重要的作用，它牢固地固定了基质，防止了再悬浮并控制了沉积物的生物地球化学。本研究的目的是比较3种海草物种在夏季（2013年2月）和季风月（2013年9月）之间具有不同根系形态的沉积物的物理和化学差异。研究了七个海草群落，它们分别是：椭圆形嗜盐菌，Thalsia hemprichii和Cymodocea rotundata的单生林，椭圆形嗜血杆菌与T. hemprichii的混合斑块，椭圆形嗜血杆菌与C. rotundata的混合斑块，以及椭圆形藻与C. rotundata的混合斑块。 3种海草种类的斑块。海草的根是造成沉积物性质差异的主要驱动力。分支的长根物种C. rotundata通过其根部释放的氧气显示出增加的氧化还原电位。无分支的长根，具浓密的根毛种，T。hemprichii，倾向于导致沉积物分类更差。还估算了碳储量，结果表明有机碳密度较高的趋势分别是多特异性斑块，单特异性斑块和裸砂。季节也影响了沉积物的性质。季风中的高波浪作用搅动了沉积物，这导致了较低的有机碳密度和较高的氧化还原电势。我们的结果表明，海草物种的根既增加又减少了沉积物的性质。 （c）2015 Elsevier Ltd.保留所有权利。

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