Spatial optimization of invasive species control informed by management practices.

Autor: Nishimoto M; Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan., Miyashita T; Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan., Yokomizo H; National Institute for Environmental Studies, Center for Health and Environmental Risk Research, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan., Matsuda H; Faculty of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan., Imazu T; Environmental and Community Affairs Department, Nature Conservation Division, Chiba Biodiversity Center, Chiba Prefectural Government 955-2 Aoba-cho, Chuo-ku, Chiba City, Chiba, 260-8682, Japan., Takahashi H; Japan Wildlife Research Center, 3-3-7 Kotobashi, Sumida-ku, Tokyo, 130-8606, Japan., Hasegawa M; Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba, 274-8510, Japan., Fukasawa K; National Institute for Environmental Studies, Center for Environmental Biology and Ecosystem Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan.
Jazyk: angličtina
Zdroj: Ecological applications : a publication of the Ecological Society of America [Ecol Appl] 2021 Apr; Vol. 31 (3), pp. e02261. Date of Electronic Publication: 2021 Jan 21.
DOI: 10.1002/eap.2261
Abstrakt: Optimization of spatial resource allocation is crucial for the successful control of invasive species under a limited budget but requires labor-intensive surveys to estimate population parameters. In this study, we devised a novel framework for the spatially explicit optimization of capture effort allocation using state-space population models from past capture records. We applied it to a control program for invasive snapping turtles to determine effort allocation strategies that minimize the population density over the whole area. We found that spatially heterogeneous density dependence and capture pressure limit the abundance of snapping turtles. Optimal effort allocation effectively improved the control effect, but the degree of improvement varied substantially depending on the total effort. The degree of improvement by the spatial optimization of allocation effort was only 3.21% when the total effort was maintained at the 2016 level. However, when the total effort was increased by two, four, and eight times, spatial optimization resulted in improvements of 4.65%, 8.33%, and 20.35%, respectively. To achieve the management goal for snapping turtles in our study area, increasing the current total effort by more than four times was necessary, in addition to optimizing the spatial effort. The snapping turtle population is expected to reach the target density one year after the optimal management strategy is implemented, and this rapid response can be explained by high population growth rate coupled with density-dependent feedback regulation. Our results demonstrated that combining a state-space model with optimization makes it possible to adaptively improve the management of invasive species and decision-making. The method used in this study, based on removal records from an invasive management program, can be easily applied to monitoring data for wildlife and pest control management using traps in a variety of ecosystems.
(© 2020 The Authors. Ecological Applications published by Wiley Periodicals LLC on behalf of Ecological Society of America.)
Databáze: MEDLINE
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