Scholarlink

<p>Marine and coastal ecosystems are highly interconnected, supporting vital ecological functions and fisheries services. Habitat loss and degradation threaten these services, especially in tropical areas. This study examined physicochemical variation, habitat structure, and nekton communities across three islands (Panjang, Semujur, and Ketawai) in Bangka, Indonesia, where a long-term exposure to tin mining activities exists. Hydrographic mapping revealed contrasting environmental regimes: nutrient-rich, turbid waters at Panjang; oligotrophic, well-flushed conditions at Semujur; and transitional features at Ketawai. Habitat surveys identified seven seagrass and four mangrove species, with notable differences among islands (PERMANOVA, <i>p</i> = 0.002). Nekton sampling found 34 species, with community composition differing significantly (PERMANOVA, <i>p</i> = 0.001). Indicator species analysis identified spatially structured taxa, including <i>Acreichthys tomentosus</i>, <i>Lethrinus obsoletus</i>, and <i>Atherinomorus lacunosus</i>. Redundancy analysis (RDA) indicated nekton communities were linked to habitat structure and abiotic factors (F = 1.82, <i>p</i> = 0.029), with <i>Thalassia hemprichii</i>, salinity, and <i>Halodule pinifolia</i> as key drivers. Nutrient enrichment near Panjang may result from sediment resuspension and mining-related runoff, though these mechanisms were not directly measured. Overall, findings suggest that nekton communities are shaped by habitat co-occurrence and physicochemical variability, underscoring the importance of maintaining habitat integrity and informing future conservation efforts amid human impacts.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Habitat connectivity and physicochemical gradients shape nekton assemblage across the seagrass-mangrove continuum in Bangka Island, Indonesia

  • 期刊论文

  • 发表日期：

    2026年5月22日

查看全文
  • Ahmad Romdon,
  • Agung Yunanto,
  • Tri Handayani,
  • Frida Sidik,
  • Ernawati Widyastuti,
  • Faisal Hamzah,
  • Jemi Ferizal,
  • Wahyu Adi,
  • Chao Fang,
  • Jianguo Du,
  • Annisa Fitri,
  • Jordi Anugrah Lumban Raja,
  • Juanda Nikola Pratama,
  • Sugandi,
  • Muhammad Thoriq Adha

摘要

Marine and coastal ecosystems are highly interconnected, supporting vital ecological functions and fisheries services. Habitat loss and degradation threaten these services, especially in tropical areas. This study examined physicochemical variation, habitat structure, and nekton communities across three islands (Panjang, Semujur, and Ketawai) in Bangka, Indonesia, where a long-term exposure to tin mining activities exists. Hydrographic mapping revealed contrasting environmental regimes: nutrient-rich, turbid waters at Panjang; oligotrophic, well-flushed conditions at Semujur; and transitional features at Ketawai. Habitat surveys identified seven seagrass and four mangrove species, with notable differences among islands (PERMANOVA, p = 0.002). Nekton sampling found 34 species, with community composition differing significantly (PERMANOVA, p = 0.001). Indicator species analysis identified spatially structured taxa, including Acreichthys tomentosus, Lethrinus obsoletus, and Atherinomorus lacunosus. Redundancy analysis (RDA) indicated nekton communities were linked to habitat structure and abiotic factors (F = 1.82, p = 0.029), with Thalassia hemprichii, salinity, and Halodule pinifolia as key drivers. Nutrient enrichment near Panjang may result from sediment resuspension and mining-related runoff, though these mechanisms were not directly measured. Overall, findings suggest that nekton communities are shaped by habitat co-occurrence and physicochemical variability, underscoring the importance of maintaining habitat integrity and informing future conservation efforts amid human impacts.