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<p>The Philippine population of the seagrass <i>Thalassodendron ciliatum</i> is reportedly rare, endangered, and restricted to mid-western Palawan. These assumptions are likely due to intermittent seagrass biodiversity and monitoring studies, limited access to expansive seagrass habitats, and limited taxonomic expertise. A recent reassessment reveals a significantly broader distribution, with confirmed populations across western and southern Palawan and the southern part of Sarangani. Species identity was verified through DNA barcoding of the plastid-encoded <i>rbc</i>L gene, representing the first genetic data for the species within the Philippines. While unconfirmed reports suggest existing populations in Masbate and Tawi-Tawi, comprehensive field surveys are necessary to establish the full geographical extent and ecological health of <i>T. ciliatum</i> in the country.</p>

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The Thriving but Threatened Seagrass Meadows: Reassessing the Status of the Enigmatic Philippine Thalassodendron ciliatum

  • 期刊论文

  • 发表日期：

    2026年8月3日

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  • William P. Dimalanta,
  • Jackery C. Rengel,
  • Shienna Mae C. Gonzaga,
  • Ronel T. Aguilar,
  • Laura T. David,
  • Michael Y. Roleda

摘要

The Philippine population of the seagrass Thalassodendron ciliatum is reportedly rare, endangered, and restricted to mid-western Palawan. These assumptions are likely due to intermittent seagrass biodiversity and monitoring studies, limited access to expansive seagrass habitats, and limited taxonomic expertise. A recent reassessment reveals a significantly broader distribution, with confirmed populations across western and southern Palawan and the southern part of Sarangani. Species identity was verified through DNA barcoding of the plastid-encoded rbcL gene, representing the first genetic data for the species within the Philippines. While unconfirmed reports suggest existing populations in Masbate and Tawi-Tawi, comprehensive field surveys are necessary to establish the full geographical extent and ecological health of T. ciliatum in the country.