Drainage-Improved Sediment Strength Enhances Saltmarsh Seedling Establishment Chance
Drainage-Improved Sediment Strength Enhances Saltmarsh Seedling Establishment Chance
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排水改善的沉积物强度提高了盐沼幼苗的形成机会
DOI：
10.3389/fmars.2022.874680
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发表时间：
2022-06
影响因子：
3.7
通讯作者：
Tjeerd J. Bouma
中科院分区：
文献类型：
--
作者：
Haobing Cao;Zhenchang Zhu;Zhan Hu;Heng Wang;Tjeerd J. Bouma
确定关键因素驱动幼苗建立盐沼恢复是必不可少的。最近的研究强调排水可以促进不同盐沼物种的幼苗建立，但其潜在机制仍然很大程度上未知。通过控制性围隔试验，研究了排沙对大米草幼苗存活、生长和稳定性的影响。令人惊讶的是，S。观察到良好排水处理直接促进了大扁杏幼苗存活和幼苗生长。但S.大扁杏幼苗的根长与幼苗的根长呈显著正相关。对沉积物性质的测量表明，排水增加了具有较低含水量和较高干容重的沉积物的临界剪切强度。这些研究结果表明，通过脱水，排水艾滋病的沉积物固结和临界剪切强度，从而促进幼苗建立在回火沉积物动力学。后者是支持的实地研究，我们发现，在两个潮滩的泥沙动力的大小呈正相关的泥沙含水量。总体而言，本研究表明，排水可能是一个关键因素，决定幼苗稳定性的关键窗口的机会，幼苗建立，它可以集成到未来的盐沼恢复设计，以提高建立成功。
Identify critical factors driving seedling establishment is essential for saltmarsh restoration. Recent studies highlight drainage can facilitate seedling establishment for different saltmarsh species, yet the underling mechanism remains largely unknown. By a manipulative mesocosm experiment with contrasting sediment drainage treatments, we investigated the impacts of drainage on Spartina anglica seedlings survival, growth and stability. Surprisingly, neither S. anglica seedling survival nor seedling growth were observed to be directly promoted by well drained treatment. However, the critical erosion depth (maximum erosion tolerance) of S. anglica seedlings was found to positively correlate with seedling root length. Measurements on the sediment properties revealed that drainage increased the critical shear strength of sediments with lower water content and higher dry bulk density. These findings indicate that, by dewatering, drainage aids to sediment consolidation and critical shear strength, and thereby facilitate seedling establishment in tempering sediment dynamics. The latter is supported by a field study, in which we found that the magnitude of the sediment dynamics on two tidal flats were positively related to water content of sediment. Overall, present study suggests that drainage could be a key factor that determines seedling stability during the critical windows of opportunity for seedling establishment, and that it could be integrated into future designs for saltmarsh restoration to enhance establishment success.
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影响因子：
3.8
作者：
G. Masselink;M. Hanley;Anissa C. Halwyn;W. Blake;K. Kingston;Thomas L. Newton;Mike Williams
通讯作者：
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DOI：
10.1002/2016jf004193
发表时间：
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期刊：
Journal of Geophysical Research: Earth Surface
影响因子：
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DOI：
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发表时间：
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期刊：
Beaches and Coasts
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
--
发表时间：
2022
期刊：
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影响因子：
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作者：
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通讯作者：
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