The role of seasonal vegetation properties in determining the wave attenuation capacity of coastal marshes: Implications for building natural defenses
The role of seasonal vegetation properties in determining the wave attenuation capacity of coastal marshes: Implications for building natural defenses
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季节性植被特性在确定沿海沼泽波浪衰减能力中的作用：对建立自然防御的影响
DOI：
10.1016/j.ecoleng.2021.106494
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发表时间：
2022-02
影响因子：
3.8
通讯作者：
Dai Zhi-Jun
中科院分区：
文献类型：
--
作者：
Zhang Wei;Ge Zhen-Ming;Li Shi-Hua;Tan Li-Shan;Zhou Ke;Li Ya-Lei;Xie Li-Na;Dai Zhi-Jun
滨海沼泽植被具有衰减波浪、减轻岸线侵蚀等重要的海岸保护作用。然而，不同植被的生物物理特性在季节和空间尺度上存在较大差异，海岸植被对波浪衰减的有效性尚不确定。2019年春、夏、秋3个季节，研究了长江口滨海湿地两种优势湿地物种——短柔莎草科（Scirpus mariqueter）和高硬禾本科（phragmites australis）的植被特征和消波能力的时空变化。波浪参数和水深在两个沼泽测量，范围在低泥滩边缘向陆地25 ~ 100 m。研究结果表明，地上生物量和植被高度是影响植被消波能力的重要因素，其中先锋植被带的消波效率最高。芦苇生物量大、茎结构好，对波高的降低效果优于山菖蒲。该研究进一步揭示了季节变化在物种特异性波衰减中植被生长的重要性。大多数刺茎从秋天开始衰老和破裂，失去了波的衰减能力。虽然芦苇属植物不能在低洼地定居，但大部分芦苇属植物在生长后期仍保持了较高的生物量，保持了与夏季观测值一致的波衰减能力和波衰减值。此外，芦苇具有很强的捕获沉积物和抬升平坦海拔的能力，这可能会提高植被-沉积物相互作用对波浪的衰减效率。本研究所得的信息有助于评价滨海湿地波浪衰减的动态有效性。因此，我们建议建立一个等级混合群落，作为一种有效的自然防御，以抵消其个体因季节和空间生态位而受到的生物限制。
Coastal marsh vegetation plays an important role in coastal protection by attenuating waves and mitigating shoreline erosion. However, the different vegetations show wide variability in biophysical properties on seasonal and spatial scales, and the effectiveness of coastal vegetation on wave attenuation remains uncertain. In the spring, summer, and autumn seasons of 2019, we investigated the spatiotemporal variability in vegetation properties and wave attenuating ability of two dominant marsh species,Scirpus mariqueter(short and flexible Cyperaceae) andPhragmites australis(tall and stiff Poaceae), in a coastal wetland in the Yangtze Estuary.The wave parameters and water depth were measured at the two marshes and ranged from 25 to 100 m landward of the low mudflat edge. The results indicated that the aboveground biomass and height of vegetation are crucial properties determining the ability of wave attenuation, and the pioneer vegetation belt has the highest wave dissipation efficiency.Phragmites,with greater biomass and stem structure, were more effective in reducing wave height thanScirpus. This study further revealed the importance of seasonal variability in vegetation growth in species-specific wave attenuation. MostScirpusstems senesced and broke up from autumn onwards, losing their wave attenuation ability. AlthoughPhragmitescould not colonize the low-lying flats such asScirpus, mostPhragmitesstems remained stiff and high biomass at the later growing stage, maintaining wave attenuation ability and wave decay values consistent with those observed in summer. Moreover,Phragmiteshas a great capacity to capture sediments and raise flat elevations, which might enhance the wave attenuation efficiency with vegetation-sediment interactions. Information from this study is helpful in evaluating the dynamic effectiveness of wave attenuation in coastal marshes. Therefore, we suggest that a hierarchical mixed community ofScirpusandPhragmitesbe established as an effective natural defense to offset their individual biological limitations due to seasonality and spatial niches.
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影响因子：
9.2
作者：
Delbert Lee Smee
通讯作者：
Delbert Lee Smee
影响因子：
4.4
作者：
Mendez, FJ;Losada, IJ
通讯作者：
Losada, IJ
影响因子：
4.4
作者：
K. Phan;M. Stive;M. Zijlema;H. S. Truong;S. Aarninkhof
通讯作者：
K. Phan;M. Stive;M. Zijlema;H. S. Truong;S. Aarninkhof
DOI：
10.1016/s0959-3780(99)00019-9
发表时间：
1999-10
影响因子：
8.9
作者：
R. Nicholls;F.M.J. Hoozemans;M. Marchand
通讯作者：
R. Nicholls;F.M.J. Hoozemans;M. Marchand
DOI：
10.2112/08-1010.1
发表时间：
2009-07
期刊：
--
影响因子：
--
作者：
H. Li;S. L. Yang
通讯作者：
H. Li;S. L. Yang