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<p>This study examined the structural and functional characteristics of plant communities in a coastal ecosystem where salt marshes and sand dunes appear sequentially from the seaward to the landward direction. Salt marsh communities were primarily distributed within 10&#xa0;m of the coastline, while sand dune communities predominantly appeared beyond 20&#xa0;m. Species richness was 1.27 times higher in sand dunes (2.29 ± 0.88 species) than in salt marshes (1.65 ± 0.74 species), and tended to increase with greater distance from the coast. Inter-species connectivity, as measured by the number of edges, was 13 in the salt marsh and 43 in the coastal sand dune, with betweenness centrality values of 4.00 and 5.06, respectively. These results indicate that species interactions in the coastal sand dune were structurally more complex than those in the salt marsh. Salinity, soil texture, and distance from the coastline were key environmental factors shaping plant community distribution, with stronger effects observed in salt marshes. These patterns likely reflect the high-salinity conditions in salt marshes that restrict plant composition to a few halophytes. In addition, net primary productivity (NPP), an important indicator of blue carbon potential, was 1.89 times higher in salt marshes (141.86 ± 216.72 gC·m⁻²·yr⁻¹) than in sand dunes (75.14 ± 51.07 gC·m⁻²·yr⁻¹), with particularly high values observed in tall herbaceous communities such as <i>Phacelurus latifolius</i> (586.04 ± 86.80 gC·m⁻²·yr⁻¹) and <i>Phragmites australis</i> (391.24 ± 361.90 gC·m⁻²·yr⁻¹). These results highlight the ecological roles of plant communities in coastal transition zones and provide important reference characteristics for identifying baseline ecosystems in coastal wetland restoration.</p>

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Species Diversity and Net Primary Productivity of Plant Communities in the Coastal Ecosystems of Southwestern Korea

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Ji-Won Park,
  • Eui-Joo Kim,
  • Jae-Hoon Park,
  • Yeo-Bin Park,
  • Jung-Min Lee,
  • Seung-Jun Lee,
  • Young-Han You

摘要

This study examined the structural and functional characteristics of plant communities in a coastal ecosystem where salt marshes and sand dunes appear sequentially from the seaward to the landward direction. Salt marsh communities were primarily distributed within 10 m of the coastline, while sand dune communities predominantly appeared beyond 20 m. Species richness was 1.27 times higher in sand dunes (2.29 ± 0.88 species) than in salt marshes (1.65 ± 0.74 species), and tended to increase with greater distance from the coast. Inter-species connectivity, as measured by the number of edges, was 13 in the salt marsh and 43 in the coastal sand dune, with betweenness centrality values of 4.00 and 5.06, respectively. These results indicate that species interactions in the coastal sand dune were structurally more complex than those in the salt marsh. Salinity, soil texture, and distance from the coastline were key environmental factors shaping plant community distribution, with stronger effects observed in salt marshes. These patterns likely reflect the high-salinity conditions in salt marshes that restrict plant composition to a few halophytes. In addition, net primary productivity (NPP), an important indicator of blue carbon potential, was 1.89 times higher in salt marshes (141.86 ± 216.72 gC·m⁻²·yr⁻¹) than in sand dunes (75.14 ± 51.07 gC·m⁻²·yr⁻¹), with particularly high values observed in tall herbaceous communities such as Phacelurus latifolius (586.04 ± 86.80 gC·m⁻²·yr⁻¹) and Phragmites australis (391.24 ± 361.90 gC·m⁻²·yr⁻¹). These results highlight the ecological roles of plant communities in coastal transition zones and provide important reference characteristics for identifying baseline ecosystems in coastal wetland restoration.