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首页> 外文期刊>Wetlands >Vegetation Response and Juvenile Northern Pike (Esox lucius) Outmigration Following Connectivity Enhancement of a Typha Dominated Coastal Wetland
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Vegetation Response and Juvenile Northern Pike (Esox lucius) Outmigration Following Connectivity Enhancement of a Typha Dominated Coastal Wetland

机译：香蒲主导的沿海湿地的连通性增强后植被响应和少年北派克（Esox lucius）迁出

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摘要

We examined if restored connectivity within a freshwater coastal wetland, dominated by invasive Typha x glauca, can increase the ecological condition, as assessed by a Floristic Quality Index (FQI), and improve habitat to benefit northern pike (Esox lucius) reproduction. Using an aquatic excavator to simulate natural rivulets, channels were excavated within monotypic Typha stands to create a link to upslope wet meadows. Following excavation, we found channels were rapidly colonized by native vegetation, resulting in higher FQI scores and percent cover of short-emergent vegetation compared to natural reference channels. Excavated channels also retained a community of vegetation with more native species five years following excavation. Fish emigration surveys revealed that excavated channels functioned as early-life habitat and had higher abundances of young-of-the-year northern pike than reference channels. A seven-year dataset (2011-2017) of northern pike outmigration at channel connectivity and pothole complexes was strongly related to water level conditions during the spawning and emigration period. We conclude that the enhancement methods increased the ecological condition of the vegetation community (i.e., FQI) suppressed by invasive Typha while the associated northern pike reproductive success highlights the importance of habitat connectivity and periodic flooding within coastal wetlands.
机译：我们检查了以入侵香蒲（Typha x glauca）为主导的淡水沿海湿地内恢复的连通性是否可以改善生态状况（通过植物质量指数（FQI）评估），并改善了栖息地，从而有利于北派克（Esox lucius）繁殖。使用水上挖掘机模拟自然溪流，在单型香蒲架子上开挖渠道，以建立与湿润草地上坡的联系。开挖后，我们发现通道被天然植被迅速定殖，与自然参考通道相比，FQI得分更高，短生植被的覆盖率更高。开挖五年后，开挖的渠道还保留了植被群落，其中有更多的本地物种。鱼类移民调查显示，挖掘出的河道起着早期生活的作用，并且比参考河道有更多的年幼的北部派克鱼。在河道连通性和坑洼复合体的北部派克迁徙的七年数据集（2011年至2017年）与产卵和迁徙期间的水位状况密​​切相关。我们得出结论，强化方法增加了由入侵香蒲抑制的植被群落（即FQI）的生态条件，而相关的北部派克繁殖成功突出了沿海湿地内栖息地连通性和定期洪水的重要性。

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  • 来源
    《Wetlands》 |2019年第5期|921-934|共14页
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  • 作者单位

    SUNY Coll Environm Sci & Forestry 1 Forestry Dr Syracuse NY 13210 USA|Ducks Unltd Inc 159 Dwight Pk Circle Suite 205 Syracuse NY 13209 USA;

    SUNY Coll Environm Sci & Forestry 1 Forestry Dr Syracuse NY 13210 USA;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Restoration; Invasive species; St. Lawrence River; Water levels;

    机译：恢复;入侵物种;圣劳伦斯河;水位;

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