Investigation on the soil resistance to wave-induced lateral erosion under different mangrove forests

IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Journal of Sea Research Pub Date : 2024-07-02 DOI:10.1016/j.seares.2024.102517
Heng Wang , Mingxiao Xie , Ou Chen , Zeng Zhou , Haobing Cao , Wen Wei
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Abstract

Under the effect of global climate change, the enhanced wave condition leads to lateral erosion at the mangrove vegetation edge, threatening the survival of mangrove habitat and the safety of coastal defense. By means of investigations on soil physicochemical properties and wave flume experiments, we quantify the lateral erosion rates of mangrove soils under waves and bridge the edge stability and vegetation with soil properties. It is found that different mangrove species and stand ages significantly alter the physiochemical properties of soils, and consequently affect the erosion resistance. Lateral erosion rate is positively correlated with organic matter content and negatively correlated with saturated density, which serve as two main factors that affect soil resistance to wave forcing. Experimental datasets suggest that the soil lateral erosion rate of Kandelia obovata reaches several times larger than that of Sonneratia apetala among different stand ages, indicating that the erosion resistance has significant differences between mangrove species. Among different Sonneratia apetala sites, the erosion resistance is enhanced with increasing mangrove stand age. This study sheds light on the feedbacks between geo-morphodynamics and intertidal vegetation, which provides a promising experimental approach to evaluate the ecological functions of mangrove forests with respect of resistance to external disturbance. Insights gained from this study is useful in guiding the nature-based solutions for coastal defense through proper spatial-temporal configuration of suitable saplings with higher potential in resilience.

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不同红树林下土壤对波浪引起的横向侵蚀的抵抗力调查
在全球气候变化的影响下,波浪增强导致红树林植被边缘侧向侵蚀,威胁红树林生境的生存和海岸防御安全。通过对土壤理化性质的研究和波浪水槽实验,我们量化了红树林土壤在波浪作用下的侧向侵蚀速率,并将边缘稳定性和植被与土壤性质联系起来。研究发现,不同的红树林种类和树龄会显著改变土壤的理化性质,进而影响土壤的抗侵蚀能力。侧向侵蚀率与有机质含量呈正相关,与饱和密度呈负相关,这两个因素是影响土壤抗波性的主要因素。实验数据表明,在不同树龄的红树林中,Kandelia obovata 的土壤侧向侵蚀率是 Sonneratia apetala 的数倍,这表明不同红树林物种的抗侵蚀能力存在显著差异。在不同的 Sonneratia apetala 地点,抗侵蚀能力随着红树林树龄的增加而增强。这项研究揭示了地貌动力学与潮间带植被之间的反馈作用,为评估红树林抵抗外部干扰的生态功能提供了一种可行的实验方法。这项研究获得的启示有助于通过在空间和时间上合理配置具有较高抗逆潜力的合适树苗,指导基于自然的海岸防御解决方案。
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来源期刊
Journal of Sea Research
Journal of Sea Research 地学-海洋学
CiteScore
3.20
自引率
5.00%
发文量
86
审稿时长
6-12 weeks
期刊介绍: The Journal of Sea Research is an international and multidisciplinary periodical on marine research, with an emphasis on the functioning of marine ecosystems in coastal and shelf seas, including intertidal, estuarine and brackish environments. As several subdisciplines add to this aim, manuscripts are welcome from the fields of marine biology, marine chemistry, marine sedimentology and physical oceanography, provided they add to the understanding of ecosystem processes.
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