Establishment of soil strength in a nourished wetland using thin layer placement of dredged sediment.
Establishment of soil strength in a nourished wetland using thin layer placement of dredged sediment.
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DOI：
10.1371/journal.pone.0251420
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Tyler ZJ
中科院分区：
文献类型：
--
作者：
Harris BD;Day DJ;Cadigan JA;Jafari NH;Bailey SE;Tyler ZJ
由于海平面上升、沉积物缺失、沉降和盐水入侵，沿海湿地正在加速破碎和退化。这降低了它们提供生态系统益处的能力，例如波衰减、候鸟栖息地以及碳和氮循环的汇。2016年，美国新泽西州一个退化的后屏障湿地通过疏浚沉积物的薄层放置（TLP）得到滋养。2019年，利用锥贯仪（CPT）进行了一项实地调查，结合传统湿地性能指标，量化与邻近参考地点相比，沉积物后营养土壤强度的建立。结果表明，受营养区土壤强度弱于对照区，说明植被根系仍处于发育阶段。地下生物量测量值与CPT强度测量值相关，表明锥贯仪测量的抗剪强度可以作为监测湿地植被轨迹的替代指标。此外，交通繁忙的地区由于重型设备负荷而被压实，抑制了植被的发展，并突出了湿地对人为干扰的敏感性。随着对更广泛的湿地恢复项目需求的增长，CPT可以提供大面积的快速高分辨率测量，为政府和管理机构提供重要的建设轨迹。
Coastal wetlands are experiencing accelerated rates of fragmentation and degradation due to sea-level rise, sediment deficits, subsidence, and salt-water intrusion. This reduces their ability to provide ecosystem benefits, such as wave attenuation, habitat for migratory birds, and a sink for carbon and nitrogen cycles. A deteriorated back barrier wetland in New Jersey, USA was nourished through thin layer placement (TLP) of dredged sediment in 2016. A field investigation was conducted in 2019 using a cone penetrometer (CPT) to quantify the establishment of soil strength post sediment nourishment compared to adjacent reference sites in conjunction with traditional wetland performance measures. Results show that the nourished area exhibited weaker strengths than the reference sites, suggesting the root system of the vegetation is still establishing. The belowground biomass measurements correlated to the CPT strength measurements, demonstrating that shear strength measured from the cone penetrometer could serve as a surrogate to monitor wetland vegetation trajectories. In addition, heavily trafficked areas underwent compaction from heavy equipment loads, inhibiting the development of vegetation and highlighting how sensitive wetlands are to anthropogenic disturbances. As the need for more expansive wetland restoration projects grow, the CPT can provide rapid high-resolution measurements across large areas supplying government and management agencies with vital establishment trajectories.
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影响因子：
8.2
作者：
Morris, James T.;Barber, Donald C.;Callaway, John C.;Chambers, Randy;Hagen, Scott C.;Hopkinson, Charles S.;Johnson, Beverly J.;Megonigal, Patrick;Neubauer, Scott C.;Troxler, Tiffany;Wigand, Cathleen
通讯作者：
Wigand, Cathleen
影响因子：
3.8
作者：
Ford, MA;Cahoon, DR;Lynch, JC
通讯作者：
Lynch, JC
影响因子：
7
作者：
Mitsch, WJ;Gosselink, JG
通讯作者：
Gosselink, JG
影响因子：
2.8
作者：
Jafari, Navid H.;Harris, Brian D.;Lane, Robert R.
通讯作者：
Lane, Robert R.
影响因子：
3.8
作者：
Jafari, Navid H.;Harris, Brian D.;Chen, Qin
通讯作者：
Chen, Qin