Stabilization and Erosion Control Value of Oyster Cultch for Intertidal Marsh
Stabilization and Erosion Control Value of Oyster Cultch for Intertidal Marsh
复制标题
牡蛎养殖对潮间带沼泽的稳定和侵蚀控制价值
DOI：
--
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
G. Thayer
中科院分区：
文献类型：
--
作者：
D. L. Meyer;E. C. Townsend;G. Thayer
在三片人造互花米草沼泽的潮间带下游边缘添加了牡蛎培养液，以检验其在保护沼泽免受侵蚀方面的价值。在每个地点建立12个5米宽的地块，其中随机选择6个未改变（未培养）的地块，并在剩余（已培养）的地块上添加培养物。1992年7月，在每个育苗样地内，育苗沿沼泽退潮边缘放置，宽1.5 m，深0.25 m。1992年9月至1994年4月，对每个样地的沼泽边缘植被稳定性和泥沙侵蚀进行了测量。西南强风暴过后，沼泽边缘的植被变化在唯一的南向站点上有显著差异（p < 0.05）。在同一地点也观察到明显不同的泥沙侵蚀和沉积速率。灌溉区沼泽边缘高地平均增加6.3 cm，未灌溉区平均减少3.2 cm。第二个地点，朝向北方，也经历了不同处理类型的沉积物积聚和侵蚀，而不是由船尾迹引起的，而船尾迹被整个场地前边缘的疏浚排水管的桥台放大了。在此期间，我们观察到沉积物堆积的显著差异，沼泽边缘的高地地区在蓄水处理中平均增加了2.9 cm，而未蓄水处理的平均损失了1.3 cm。
Oyster cultch was added to the lower intertidal fringe of three created Spartina alterniflora marshes to examine its value in protecting the marsh from erosion. Twelve 5‐m‐wide plots were established at each site, with six randomly selected plots unaltered (non‐cultched) and cultch added to the remaining (cultched) plots. Within each cultched plot, cultch was placed along the low tide fringe of the marsh during July 1992, in a band 1.5 m wide by 0.25 m deep. Marsh‐edge vegetation stability and sediment erosion were measured for each plot from September 1992 to April 1994. Significant differences (p < 0.05) in marsh‐edge vegetation change were detected at the only south‐facing site after a major southwester storm. Significantly different rates of sediment erosion and accretion also were observed at this same site. Areas upland of the marsh edge in the cultched areas showed an average accretion of 6.3 cm, while noncultched treatment areas showed an average loss of 3.2 cm. A second site, with a northern orientation, also experienced differential sediment accretion and erosion between treatment type, caused instead by boat wakes that were magnified by the abutment of a dredge effluent pipe across the entire front fringe of the site. During this period we observed significant differences in sediment accumulation, with the areas upland of the marsh edge in the cultched treatment having an average accretion of 2.9 cm and the noncultched an average loss of 1.3 cm.