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<p>To improve understanding of coastal seagrass bed habitats in China, this study investigated seagrass distribution patterns and analyzed water column and sediment parameters of seagrass bed ecosystems on Guanglu, Zhangzi, and Haiyang Islands in Changhai County, Dalian City, during August 2022. The findings revealed that seagrass beds were predominantly composed of <i>Zostera marina, Zostera japonica</i>, and <i>Zostera caespitosa</i>, with <i>Zostera marina</i> as the dominant species. All seagrass species exhibited patchy spatial distributions, potentially linked to localized environmental stressors. Seagrass beds on Zhangzi Island exhibited high suspended particulate matter, while those on Haiyang Island showed elevated sediment chemical constituents and low dissolved oxygen in the water column. Among the three sites, Zhangzi Island had the lowest macroalgal coverage, shoot density, and epiphytic biomass. Seagrass beds on Haiyang Island displayed higher epiphytic biomass than the other two islands. Conversely, seagrass beds on Guanglu Island were characterized by lower shoot height and benthic biomass. Although ecological assessment indices classified all three island seagrass beds as grade I (currently stable), persistent anthropogenic disturbances were identified as drivers of gradual degradation, potentially threatening future stability. These findings highlight site-specific habitat characteristics and underscore the importance of targeted conservation strategies. This research provides crucial baseline data for the conservation and management of coastal seagrass beds.</p>

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Assessment of habitat characteristics in typical seagrass bed ecosystems along the coast of Changhai County, Dalian

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Yuchen Chu,
  • Jun Yang,
  • Juncheng Yin,
  • Jie Tian,
  • Jun Song,
  • Kaiting Zhi,
  • Dan Zhao,
  • Yan Wang,
  • Yufeng Zhang,
  • Yanjun Wang,
  • Qian Sun,
  • Quanxiang Meng,
  • Hechen Sun,
  • Yechong Han,
  • Lin Qi,
  • Wenqi Wang

摘要

To improve understanding of coastal seagrass bed habitats in China, this study investigated seagrass distribution patterns and analyzed water column and sediment parameters of seagrass bed ecosystems on Guanglu, Zhangzi, and Haiyang Islands in Changhai County, Dalian City, during August 2022. The findings revealed that seagrass beds were predominantly composed of Zostera marina, Zostera japonica, and Zostera caespitosa, with Zostera marina as the dominant species. All seagrass species exhibited patchy spatial distributions, potentially linked to localized environmental stressors. Seagrass beds on Zhangzi Island exhibited high suspended particulate matter, while those on Haiyang Island showed elevated sediment chemical constituents and low dissolved oxygen in the water column. Among the three sites, Zhangzi Island had the lowest macroalgal coverage, shoot density, and epiphytic biomass. Seagrass beds on Haiyang Island displayed higher epiphytic biomass than the other two islands. Conversely, seagrass beds on Guanglu Island were characterized by lower shoot height and benthic biomass. Although ecological assessment indices classified all three island seagrass beds as grade I (currently stable), persistent anthropogenic disturbances were identified as drivers of gradual degradation, potentially threatening future stability. These findings highlight site-specific habitat characteristics and underscore the importance of targeted conservation strategies. This research provides crucial baseline data for the conservation and management of coastal seagrass beds.