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Effects of Bathymetric Grid-Cell Sizes on Habitat Suitability Analysis of Cold-water Gorgonian Corals on Seamounts |
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| Authors: | Mai Miyamoto Masashi Kiyota Hiroto Murase Takeshi Nakamura Takeshi Hayashibara |
| Institution: | 1. Oceanic Resources Division, National Research Institute of Far Seas Fisheries, Japan Fisheries Research and Education Agency, Yokohama, Kanagawa, Japan;2. Department of Fisheries Distribution and Management, National Fisheries University, Japan Fisheries Research and Education Agency, Shimonoseki, Yamaguchi, Japan;3. Research Center for Subtropical Fisheries, Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Ishigaki, Okinawa, Japan |
| Abstract: | We investigated the effects of the spatial resolution of bathymetry data on the predicted local distribution of large gorgonian corals on the southern Emperor Seamounts in the high seas of North Pacific. Terrain attributes were calculated from bathymetric survey data at six different grid-cell sizes (25–800 m) to investigate how the values of bottom terrain attributes and the prediction of MaxEnt habitat suitability models would vary with grid-cell size. The values of each terrain attribute showed different patterns among different grid-cell sizes, and MaxEnt demonstrated better performance at grid-cell size of 100 m or less than at larger sizes. |
| Keywords: | Cold-water corals habitat suitability modeling multi-beam bathymetry seamounts spatial resolution terrain analysis |