Wetland Restoration in Typha-Dominated Braddock Bay of Lake Ontario

IF 2.3 4区 环境科学与生态学 Q2 ECOLOGY
Alexander O. Silva, D. Wilcox, Eli L. Polzer
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引用次数: 2

Abstract

The barrier beach at the Braddock Bay wetland on Lake Ontario was lost to erosion. Without the protective barrier, the area of vegetated wetland was reduced by wave attack. Lake-level regulation implemented in 1960 resulted in cattail (primarily hybrid Typha × glauca), invasion and loss of sedge-grass meadow habitat. As part of the Rochester Embayment Great Lakes Area of Concern, Braddock Bay was targeted for restoration by the U.S. Army Corps of Engineers. The plan included reducing coverage by cattails, construction of channels and potholes to improve wildlife access to the wetland, creation of spoil mounds along the channels to discourage growth of cattail while supporting the growth of sedge-grass meadow species, re-creation of the barrier beach, and construction of new emergent marsh. We collected vegetation data for three years following the 2016 construction activities. Post-restoration results showed that cattail cover decreased greatly across years in the cattail treatment areas, decreased in lower elevation constructed habitats, and gradually increased in higher elevation habitats. Opening of the canopy resulted in increased floating and submersed species, and constructed mounds hosted wet meadow species. Site-level weighted mean C is recommended for future data analyses, rather than FQAI or mean C, because it has no observed influence from species richness. Restoration results were affected by high lake levels in 2017, identified problems in seeding and planting, and meeting construction plans for some channel and pothole depths and mound elevations. Pre-restoration soil surveys are recommended to reduce construction problems, and adaptive management should include invasive species control.
安大略湖以台风为主的布洛克湾湿地恢复
安大略湖上的布拉多克湾湿地的屏障海滩因侵蚀而消失。如果没有防护屏障,植被湿地的面积会因波浪的侵袭而减少。1960年实施的湖面管制导致香蒲(主要是杂交Typha × glauca)入侵和莎草草甸栖息地的丧失。作为罗彻斯特海湾五大湖关注区域的一部分,布拉多克湾是美国陆军工程兵团修复的目标。该计划包括减少香蒲的覆盖范围,建设渠道和坑洼,以改善野生动物进入湿地的途径,沿着渠道建立废土丘,以阻止香蒲的生长,同时支持莎草草甸物种的生长,重新创造屏障海滩,以及建设新的新兴沼泽。我们收集了2016年建设活动后三年的植被数据。恢复后的结果表明,香蒲盖度在香蒲处理区内逐年大幅下降,在低海拔人工生境中逐渐减少,在高海拔生境中逐渐增加。冠层的打开导致了漂浮和淹没物种的增加,而构建的土丘则承载了湿草甸物种。在未来的数据分析中,推荐使用站点水平加权平均C,而不是FQAI或平均C,因为它没有观察到物种丰富度的影响。2017年湖泊高水位影响了修复效果,发现了播种和种植方面的问题,并满足了部分渠道和坑洼深度和丘高程的施工计划。建议在修复前进行土壤调查,以减少施工问题,适应性管理应包括入侵物种控制。
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来源期刊
Ecological Restoration
Ecological Restoration Environmental Science-Nature and Landscape Conservation
CiteScore
1.70
自引率
12.50%
发文量
24
期刊介绍: Ecological Restoration is a forum for people advancing the science and practice of restoration ecology. It features the technical and biological aspects of restoring landscapes, as well as collaborations between restorationists and the design professions, land-use policy, the role of education, and more. This quarterly publication includes peer-reviewed science articles, perspectives and notes, book reviews, abstracts of restoration ecology progress published elsewhere, and announcements of scientific and professional meetings.
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