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首页> 外文期刊>Oceanographic Literature Review >Beach restoration improves habitat quality for American horseshoe crabs and shorebirds in the Delaware Bay,USA
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Beach restoration improves habitat quality for American horseshoe crabs and shorebirds in the Delaware Bay,USA

机译：海滩恢复在美国特拉华湾的美国马蹄铁蟹和岸上栖息地提高了栖息地品质

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摘要

Beach nourishment is commonly conducted to protect human infrastructure but rarely for the primary purpose of improving wildlife habitat. To improve horseshoe crab spawning and shore-bird feeding habitat in the Delaware Bay, New Jersey (USA), we removed 2000 t of shoreline rubble and placed sand on 16 ha of degraded shoreline spanning 8 beaches. Horseshoe crab egg cluster abundance varied annually, seasonally and spatially. Beaches restored using sand with grain size fractions similar to native sand had horseshoe crab egg cluster abundances matching or exceeding those of high-quality reference beaches. Deeper sand with a higher coarse-grain fraction resulted in the highest egg cluster abundance across all sites and beaches, while finer-grained sand used on a subset of restored beaches was associated with lower egg cluster abundances. These patterns were also reflected in shallow egg availability for shorebirds, with egg cluster abundance correlating positively with shallow egg abundance. Over time, sand placed on beaches moved cross-shore and longshore, and overwashed into marshes. Longshore sand movement nourished adjacent beaches and ebb shoals at creek mouths. Such shoals attract spawning horseshoe crabs and have high densities of surface eggs available for shorebird feeding, but experience high attrition of egg clusters. This study demonstrates that investments in beach restoration provide important benefits for horseshoe crabs and shorebirds. Outcomes can be further improved by expanding project scope and integrating other coastal restoration strategies. Restoration will be critical for the conservation of coastal species as sea levels rise and current and past coastal management practices continue to degrade habitats.
机译：海滩营养通常是为了保护人类基础设施，但很少用于改善野生动物栖息地的主要目的。为了改善新泽西州新泽西州（美国）的马蹄蟹产卵和岸鸟饲养栖息地，我们删除了2000年的海岸线瓦砾，并在16公顷的退化海岸线上放置了沙子，遍布了8个海滩。马蹄蟹蛋聚类每年，季节性和空间都多样化。使用与天然沙子类似的沙子尺寸分数恢复的海滩有马蹄蟹蛋簇丰富匹配或超过高质量参考海滩。粗粒级较高的深层沙子导致所有场地和海滩上的最高蛋簇丰度，而在恢复的海滩子集上使用的细粒砂砂与较低的蛋簇丰富有关。这些模式也反映在浅卵泡的浅卵泡可用性，蛋簇丰度与浅蛋丰度正相关。随着时间的推移，沙滩放在海滩上移动了跨海和龙岸，淹没了沼泽。龙岸沙运动在溪口营养邻近的海滩和潮流浅滩。这种浅滩吸引了产卵马蹄蟹，并具有高密度的表面蛋，可用于岸鸟饲料，但体验蛋簇的高磨损。本研究表明，海滩恢复的投资为马蹄铁和岸上的船只提供了重要的益处。通过扩大项目范围和整合其他沿海恢复策略，可以进一步提高结果。随着海平面的上升和当前和过去的沿海管理实践继续降低栖息地，恢复将使沿海地区的避孕至关重要。

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  • 来源
    《Oceanographic Literature Review》 |2020年第9期|2028-2028|共1页
  • 作者

    J.A.M. Smith; L.J. Niles; S. Hafner;

  • 作者单位

    Wildlife Restoration Partnerships 109 Market Lane Greenwich NJ 08323 United States;

    Wildlife Restoration Partnerships 109 Market Lane Greenwich NJ 08323 United States;

    Wildlife Restoration Partnerships 109 Market Lane Greenwich NJ 08323 United States;

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