Design of Marine Protected Areas on Northern Coast of Taiwan Using the Spatial Planning Model
Date Issued
2014
Date
2014
Author(s)
Lee, Kuan-Hung
Abstract
The coastline of Northern Taiwan is about 158 km (including 140 km in New Taipei City and 18 km in Keelung City) and the coastal area is intensively impacted by anthropogenic activities from metropolitan Taipei. This study is aimed to develop the most suitable design of marine protected areas by applying MARXAN to evaluate the biological, environmental, and socio-economic factors.
The area from the high-tide zone to about 3 nautical miles offshore was divided into grid cells (each 1 km x 1 km) and a total of 657 cells including 176 cells of the Coast category and 481 cells of the Sea categories. In the Coast category, biological and ecological data (including benthic biodiversity, special habitats, coral coverage, etc.) and socio-economic data (tourists, local population, ports, artificial coast, etc.) of each cell was collected. For some cells lack of available data, a “surrogate” was applied as the conservation objectives of the category. In the Sea category, the results of evaluation studies of artificial reefs were used as the basis, together the data of commercial fisheries. Then, we used computer softwares (ArcGIS 10.0 and MARXAN) to evaluate the grid cells and to depict the coastal conservation map. Under MARXAN operation, each grid is given a relative cost of conservation and the plan is to achieve the maximum conservation objectives by minimum cost. Based on the conservation objectives and the length of the boundary correction term (Boundary Layer Modifier, BLM), the “priority sites” for conservation will be generated.
The 176 grid cells of Coast category were evaluated with different scenarios (BLM = 0, 0.02, and 1) and 20% of the area as the conservation goal. The best result was reached under BLM=0.02. In the Sea category, three scenarios (BLM = 0, 0.0002, and 1) and 20% of the area as the conservation goals were applied for evaluation and the best result was reached when BLM=0.0002). Then, all the grid cells of the two categories were combined to generate conservation maps under different scenarios (BLM = 0, 0.0002, and 1). The results showed that the sea area from Bitoujiao（鼻頭角） to Yenliao（鹽寮） to Sandiaojiao（三貂角）, was the best site for marine conservation.
Subjects
海洋保護區
禁漁區
MARXAN
沿岸漁業
人工魚礁
SDGs
Type
thesis
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