Estimating Species Abundance from Presence–Absence Maps by Kernel Estimation

doi:10.1007/s13253-023-00589-4

淡江大學機構典藏 > 商管學院 > 統計學系暨研究所 > 期刊論文 > Item 987654321/124788

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题名:	Estimating Species Abundance from Presence–Absence Maps by Kernel Estimation
作者:	Chang, Ya-mei
关键词:	Spatial aggregation;Bandwidth parameter;Negative binomial
日期:	2023-12
上传时间:	2023-12-06 12:05:32 (UTC+8)
摘要:	We present a novel method for estimating species abundance using presence–absence maps. Our approach takes the spatial context into consideration, distinguishing it from conventional methods. The proposed method is built upon a well-known kernel estimation for point pattern intensity, with the addition of a new parameter representing the mean abundance in each occupied cell. The parameter estimate is obtained through maximum likelihood estimation. The expected abundance corresponds to the integral of the intensity over the study area, which can be estimated by taking the Riemann sum of the intensity. The implementation of our method is straightforward, using existing packages in the R software. We compared various bandwidth selection methods within our approach and assessed the estimation performance against some approaches based on the random placement model or negative binomial model through the simulation study and an empirical forestry data in Barro Colorado Island (BCI), Panama. The results of the simulation and the application demonstrate that our method, with a carefully chosen bandwidth, outperforms the alternatives for highly aggregated data and improves the issue of underestimation. Supplementary materials accompanying this paper appear online.
關聯:	Journal of Agricultural, Biological and Environmental Statistics
DOI:	10.1007/s13253-023-00589-4
显示于类别:	[統計學系暨研究所] 期刊論文

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