Spatial Distribution of Mangrove in Kelapan Island, South Bangka Regency

Abstract

Mangrove forests are an important coastal renewable resources which were found in the brackish water, estuary, lagoon, and tropical island. These forest provide important ecosystem goods, create the new island in the coastal area and biofilter's supporting as a place to live, to spawn, to feed and coastal food web. One of the area in South Bangka Regency, Bangka Belitung Province, which found high biodiversity species and density mangroves is a Kelapan Island. A little Information about mangrove spatial distribution in Kelapan Island became main problem in the management of sustainability mangrove ecosystem, therefore this study done. The purpose of this study was to analyze the condition of mangrove area, despite of it was density level and wide changing of mangrove using remote sensing approach. The mangrove condition should be analyzed to observe human activities that influence surrounded environment. Output this study is to map out spatial distribution of mangrove using Sentinel 2A imagery high spatial resolution and GIS technology with acquired in April 05 th 2018. Mangroves canopy and the others was delineated by using visual interpretation, and standard true color composite band (483) and false color composite band (843) of Sentinel 2A and also using transformation NDVI formula based on histogram adjustment result. This research show that the mangrove density could be classified in to three classes: low density (18.12 ha), medium density (97.87 ha), and high density (110.61). Estimation of mangrove area based on result is 226.60 Ha. The field studies recognized that types of mangrove identified in Kelapan Island are dominated by Rhizophora sp, Sonneratia sp, Bruguierra sp.

Unveiling the Diversity of Bangka Island’s Mangroves: A Baseline for Effective Conservation and Restoration

“…These unreported species include Avicennia alba, Bruguiera sexangula, Ceriops tagal, Excoecaria agallocha, Lumnitzera littorea, and Pandanus tectorius. Moreover, our findings revealed that other species such as Acanthus ilicifolius, Acrostichum speciosum, Aegiceras corniculatum, Bruguiera cylindrica, Bruguiera parviflora, Bruguiera sexangula, Ceriops decandra, Nypa fruticans, and Scyphiphora hydrophyllacea had also not been encountered or reported in previous studies in the Bangka Selatan Regency [45,[61][62][63]. Likewise, studies in the Bangka Tengah Regency [24,30,31,42,43,64] had not reported species such as Aegiceras corniculatum, Bruguiera cylindrica, Ceriops decandra, and Scyphiphora hydrophyllacea.…”

Characterizing Spatiotemporal Patterns of Mangrove Forests in Can Gio Biosphere Reserve Using Sentinel-2 Imagery

“…A similarity in shape and distribution was illustrated in Figure 3a,b between mangrove populations derived from NDVI indices and the referenced mangrove map. Previous studies implemented the mangrove classifications in the world using the NDVI, obtained from high-resolution Quick Bird multispectral satellite imagery with a 2.4 m spatial resolution and a ground truth measurement [10,45]. These studies also observed that the mangrove species obtained from the NDVI value was recorded as above 0.3.…”

“…The increasing values from 0 to +1 depict the presence of vegetation, and near +1 indicates the denser vegetation covered in the area. If the value decreases beyond 0 to −1, it represents the present of bare land, water bodies, ice, snow and manmade features [10,45]. In this study, the Digital Number (DN) value of the NDVI images are categorized from low density to high density as per Table 1 [46,47].…”