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Does size matter? Quantifying the cumulative impact of small‐scale living shoreline and oyster reef restoration projects on shoreline erosion
Restoration Ecology ( IF 3.2 ) Pub Date : 2020-07-01 , DOI: 10.1111/rec.13235
Giovanna M. McClenachan 1, 2 , Melinda J. Donnelly 1 , Michelle N. Shaffer 1 , Paul E. Sacks 1 , Linda J. Walters 1
Affiliation  

Shoreline erosion is a common problem for coastal systems, especially in areas of high human use. Small‐scale living shoreline (LSL) and oyster reef restoration projects can potentially slow or reverse shoreline erosion in low‐energy coastal environments. These projects are often easier and cheaper to implement when compared to hard armoring. However, their small size can also lead to limited funds for long‐term monitoring and an underestimation of their impact on altering local erosion dynamics. Universal metrics are popular for monitoring the biological success of small‐scale restoration projects, but may lack an affordable, easy method to quantify shoreline change over large spatial and temporal scales, including understanding losses prior to project initiation. Digital Shoreline Analysis System (DSAS) is a viable method to quantify cumulative shoreline change for multiple small‐scale restoration projects in one ecosystem. For example, over the past 12 years, 89 oyster reef and 14 small‐scale LSL restoration projects have occurred in Mosquito Lagoon, FL, U.S.A. While each project has been individually monitored, there has yet to be a combined quantification of the cumulative impact to shoreline erosion. Using imagery from USGS's Earthexplorer and the DSAS tool in ArcGIS, we calculated cumulative shoreline change impacts of small‐scale restorations in one ecosystem. Both small‐scale LSL and oyster reef restoration reversed shoreline erosion to accretion. Cumulative net shoreline gain for the LSL and oyster restoration projects were 347.62 m2/year and 288.91 m2/year, respectively. Quantifying cumulative shoreline change of multiple small‐scale restoration projects is a beneficial addition to universal monitoring.

中文翻译:

大小重要吗?量化小型活动海岸线和牡蛎礁修复项目对海岸线侵蚀的累积影响

海岸线侵蚀是沿海系统的一个普遍问题,尤其是在人类高度使用的地区。在低能耗沿海环境中,小规模的活动海岸线(LSL)和牡蛎礁修复项目可能会减缓或逆转海岸线的侵蚀。与硬装甲相比,这些项目的实施通常更容易,更便宜。但是,它们的规模小,也可能导致用于长期监测的资金有限,并且低估了它们对改变局部侵蚀动态的影响。通用度量标准普遍用于监视小型恢复项目的生物学成功,但可能缺乏负担得起的,简便的方法来量化大时空尺度上的海岸线变化,包括在项目启动前了解损失。数字海岸线分析系统(DSAS)是一种可行的方法,可以量化一个生态系统中多个小型恢复项目的累积海岸线变化。例如,在过去的12年中,美国佛罗里达州的蚊子泻湖进行了89个牡蛎礁和14个小规模LSL修复项目。尽管每个项目都受到单独监测,但尚未对海岸线侵蚀。使用来自USGS的Earthexplorer的图像和ArcGIS中的DSAS工具,我们计算了一个生态系统中小规模恢复的累积海岸线变化影响。小型LSL和牡蛎礁的恢复都将海岸线侵蚀逆转为吸积。LSL和牡蛎修复项目的累计净海岸线收益为347.62 m 在美国佛罗里达的蚊子泻湖,发生了89个牡蛎礁和14个小规模的LSL修复项目。尽管每个项目都受到单独监测,但尚未综合量化对海岸线侵蚀的累积影响。使用来自USGS的Earthexplorer的图像和ArcGIS中的DSAS工具,我们计算了一个生态系统中小规模恢复的累积海岸线变化影响。小型LSL和牡蛎礁的恢复都将海岸线侵蚀逆转为积聚。LSL和牡蛎修复项目的累计净海岸线收益为347.62 m 在美国佛罗里达的蚊子泻湖,发生了89个牡蛎礁和14个小规模的LSL修复项目。尽管每个项目都受到单独监测,但尚未综合量化对海岸线侵蚀的累积影响。使用来自USGS的Earthexplorer的图像和ArcGIS中的DSAS工具,我们计算了一个生态系统中小规模恢复的累积海岸线变化影响。小型LSL和牡蛎礁的恢复都将海岸线侵蚀逆转为积聚。LSL和牡蛎修复项目的累计净海岸线收益为347.62 m 我们计算了一个生态系统中小规模恢复的累积海岸线变化影响。小型LSL和牡蛎礁的恢复都将海岸线侵蚀逆转为吸积。LSL和牡蛎修复项目的累计净海岸线收益为347.62 m 我们计算了一个生态系统中小规模恢复的累积海岸线变化影响。小型LSL和牡蛎礁的恢复都将海岸线侵蚀逆转为吸积。LSL和牡蛎修复项目的累计海岸线净收益为347.62 m2 /年和288.91 m 2 /年。量化多个小型恢复项目的累积海岸线变化是普遍监测的有益补充。
更新日期:2020-07-01
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