Scholarlink

<p>Mangrove ecosystems in Carigara Bay, Leyte, Philippines remain underdocumented at the <i>barangay</i> scale despite their ecological and coastal-management importance. This study integrated a spatial land use and land cover (LULC) assessment of the coastal <i>barangays</i> of Carigara and Barugo with a field-based mangrove biodiversity assessment conducted in nine coastal <i>barangays</i>. The 2020 NAMRIA Region VIII Land Cover Map dataset derived from Sentinel-2 imagery was processed in ArcGIS and assessed using 300 stratified validation points. Field sampling was conducted from December 2024 to March 2025 using transect and quadrat methods across the nine selected coastal <i>barangays</i>. The classified coastal landscape covered 2,387.66 ha and achieved 81.67% overall accuracy with a Kappa coefficient of 0.78. Mangrove forest cover was significantly associated with inland water/river cover across <i>barangays</i> (ρ = 0.4491, <i>p</i>= 0.0316), with a stronger association in Carigara (ρ= 0.7204, <i>p </i>= 0.0082). A total of 3,150 individuals representing 23 true mangrove species from 10 families were recorded. The assemblage was dominated by <i>Avicennia marina</i> (39.49%), whereas conservation-concern taxa occurred at low abundance. Geographic occupancy distinguished widely distributed, intermediate, and restricted taxa, and Indicator Species Analysis identified six species with significant barangay-group associations. Diversity analysis showed low Shannon diversity despite relatively high richness, with significant barangay-level differences in Shannon diversity and Simpson dominance. PERMANOVA confirmed significant barangay-level differences in species composition and abundance, with NMDS supporting spatial assemblage differentiation. Overall, Carigara Bay supports a species-rich, spatially heterogeneous, and dominance-structured mangrove assemblage, highlighting the need for barangay-specific and species-matched conservation planning.</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

Spatial Land Use and Land Cover Patterns and Mangrove Community Structure in Carigara Bay, Leyte, Philippines

  • 期刊论文

  • 发表日期：

    2026年7月11日

查看全文
  • Harby Jan C. Casido,
  • Geronimo R. Rosario

摘要

Mangrove ecosystems in Carigara Bay, Leyte, Philippines remain underdocumented at the barangay scale despite their ecological and coastal-management importance. This study integrated a spatial land use and land cover (LULC) assessment of the coastal barangays of Carigara and Barugo with a field-based mangrove biodiversity assessment conducted in nine coastal barangays. The 2020 NAMRIA Region VIII Land Cover Map dataset derived from Sentinel-2 imagery was processed in ArcGIS and assessed using 300 stratified validation points. Field sampling was conducted from December 2024 to March 2025 using transect and quadrat methods across the nine selected coastal barangays. The classified coastal landscape covered 2,387.66 ha and achieved 81.67% overall accuracy with a Kappa coefficient of 0.78. Mangrove forest cover was significantly associated with inland water/river cover across barangays (ρ = 0.4491, p= 0.0316), with a stronger association in Carigara (ρ= 0.7204, p = 0.0082). A total of 3,150 individuals representing 23 true mangrove species from 10 families were recorded. The assemblage was dominated by Avicennia marina (39.49%), whereas conservation-concern taxa occurred at low abundance. Geographic occupancy distinguished widely distributed, intermediate, and restricted taxa, and Indicator Species Analysis identified six species with significant barangay-group associations. Diversity analysis showed low Shannon diversity despite relatively high richness, with significant barangay-level differences in Shannon diversity and Simpson dominance. PERMANOVA confirmed significant barangay-level differences in species composition and abundance, with NMDS supporting spatial assemblage differentiation. Overall, Carigara Bay supports a species-rich, spatially heterogeneous, and dominance-structured mangrove assemblage, highlighting the need for barangay-specific and species-matched conservation planning.