Predicting potential current distribution of Lycorma delicatula (Hemiptera: Fulgoridae) using MaxEnt model in South Korea

Hyeban Namgung,Min-Jung Kim,Hyojoong Kim,Sunghoon Baek,Joon-Ho Lee

doi:10.1016/j.aspen.2020.01.009

Hyeban Namgung, Min-Jung Kim + Show 3 more

Open Access

https://doi.org/10.1016/j.aspen.2020.01.009

Copy DOI

Abstract

Abstract Lycorma delicatula (Hemiptera: Fulgoridae) is an invasive insect in Korea which causes plant damages by sucking and sooty molds. Lycorma delicatula was first detected in South Korea in 2004, where its introduction and spreading possibly were affected by human activity-related factors. Here, we used MaxEnt to describe current distribution of L. delicatula in Korea and tried to find out the impact of human influences on distribution. We used 143 sites of occurrence data, 19 bioclimatic variables, duration of temperature below −11 °C, average daily minimum temperature in January, cumulative thermal unit variable, the distribution of grape orchard variable and human footprint to create models. These models were estimated by two sets of 24 candidates with feature combinations and regularization multipliers. In addition, these two sets were created as models with and without footprint to assess human influence on distribution. Model selection for optimal model was performed by selecting a model with a lowest sum of each rank in small sample-size corrected Akaike’s information criterion and difference between training and test AUC. Model of LQ10 parameter combinations was selected as optimal models for both model sets. Consequently, both of distribution maps from these models showed similar patterns of presence probability for L. delicatula. Both models expected that low altitude regions were relatively more suitable for L. delicatula than mountain areas in Korea. Footprint might be limited for the distribution and L. delicatula might already occupy most of available habitats. Human-related factors might contribute to spread of L. delicatula to uninfected areas.

Highlights

Spotted lanternfly, Lycorma delicatula (Hemiptera: Fulgoridae), is an invasive species of which origin is the southern China and the countries in the subtropical zones of SoutheastAsia [1]
This study aims to select best combinations of parameters for application of presence data of L. delicatula and its surrounding environmental and human related variables in MaxEnt, to select variables affecting the current distribution, to find out the effects of anthropogenic factor, and to visualize current presence probability of L. delicatula in Korea
Total 143 presence data points of L. delicatula were collected from the published papers [6, 16,17,18,19] (15 points), the report of National Institute of Ecology (NIE) [20] (83 points), and observation of this study (45 points)

Summary

Introduction

Lycorma delicatula (Hemiptera: Fulgoridae), is an invasive species of which origin is the southern China and the countries in the subtropical zones of SoutheastAsia [1]. In Korea, L. delicatula was first detected in Cheonan in 2004 [2], and expanded across South Korea for more than a decade [3]. Park et al [3], L. delicatula might disperse more frequently in the western region and its longdistance dispersal could be possible beyond the mountain range. These rapid spread might be caused by human-related factors such as vehicles which mainly could transfer a host plant or other material with its egg masses [6]. Jung et al [7] estimated the potential habitats of L. delicatula in

Objectives

Methods

Results

Conclusion