Research Article |
Corresponding author: Xiangsheng Chen ( chenxs3218@163.com ) Academic editor: J. Adilson Pinedo-Escatel
© 2024 Zhengxue Zhao, Lin Yang, Xiangsheng Chen.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Zhao Z, Yang L, Chen X (2024) Current and future potential distribution of two bamboo pests in China: Anaka burmensis and Cicadella viridis (Hemiptera, Cicadellidae). ZooKeys 1203: 197-210. https://doi.org/10.3897/zookeys.1203.118978
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China’s bamboo output is closely associated with its national economy; however, it is currently rapidly declining due to damage from the pests Anaka burmensis and Cicadella viridis. Identifying regions that are environmentally suitable for these pests is a critical step in their effective control. Therefore, in this study, we used a Maxent model to predict their current and future potential areas of distribution (2021–2040, 2041–2060, and 2061–2080) and explored changes over time using distribution data and related environmental variables. The model results demonstrates that the current potential areas of distribution of A. burmensis are predominantly concentrated in several provinces of southern and central China, such as Guizhou, Guangxi, and Hubei, whereas the current potential areas of distribution of C. viridis are primarily in many provinces across southern, central, and northeastern China. In the future, the potential distribution of A. burmensis will increase and move minimally, whereas the potential distribution of C. viridis will decrease and move considerably. The results of the present study provide vital information for predicting the spread and outbreaks of C. viridis and A. burmensis and provide a reference framework for developing management strategies to control these two pests, thereby minimizing economic loss in the bamboo industry.
Climate change, distribution areas, Maxent model
Bamboo comprises all members of the subfamily Bambusoideae and is the only lineage in the Poaceae family that has adapted and diversified to forest habitats (
China has abundant bamboo resources, with 753 species accounting for approximately 50% of the world’s bamboo (
Anaka burmensis Dworakowska, 1993 and Cicadella viridis (Linnaeus, 1758) are two important bamboo pests (
Anaka burmensis is distributed across southern China, including Guizhou and Yunnan (
Species distribution models use occurrence records and environmental data to produce a model of the species’ requirements and a map of its potential distribution (
In this study, we used a Maxent model to predict the current and future potential distribution areas of A. burmensis and C. viridis in China using occurrence records and environmental data. We aim to answer two questions: 1) where are the potential distribution areas, both currently and in the future, and 2) how has the potential distribution area changed over time?
We collected the occurrence records of Anaka burmensis and Cicadella viridis in China from the literature and from the Global Biodiversity Information Facility (GBIF, https://www.gbif.org/). Occurrence records that lacked latitude and longitude data were georeferenced using Google Earth. Sampling bias in geographic space frequently arises due to unequal sampling efforts, which can lead to incorrect predictions in species distribution models (
We used 19 bioclimatic variables (1970–2000) and one elevation datum (altitude) from the current period as the current environment variables. To minimize multicollinearity among environmental variables, we calculated the variance inflation factor for the corresponding environmental variable values of the occurrence records of A. burmensis and C. viridis. Then, we eliminated the environment variable with the largest variance inflation factor each time until the variance inflation factor values of selected environment variables were less than 5. Finally, four environmental variables were retained for A. burmensis: mean diurnal range (bio2), mean temperature of wettest quarter (bio8), precipitation of warmest quarter (bio18), and precipitation of coldest quarter (bio19), whereas five environmental variables were retained for C. viridis: isothermality (bio3), mean temperature of wettest quarter (bio8), precipitation of driest month (bio14), precipitation seasonality (bio15), and precipitation of warmest quarter (bio18).
We selected future bioclimatic variables for the periods 2021–2040, 2041–2060, and 2061–2080 from the Coupled Model Intercomparison Project Phase 6 (CMIP 6). Four main emission scenarios driven by different socioeconomic assumptions are provided for CMIP6: SSP126, SSP245, SSP370, and SSP585. However, to avoid extreme simulation, the SSP245 scenario, a moderate emission scenario, was used (
The bioclimatic variables and elevation data were obtained from the WorldClim database (http://www.worldclim.org), with a 2.5-arc min spatial resolution (~5 km resolution at the equator).
The model was developed in Maxent software v. 3.4.4. Regular multipliers (RM) and feature classes (FC) are closely related to the accuracy of the Maxent model (
To quantify the distributional shifts between the current and future potential distribution areas, centroid analysis was performed using the SDMtoolbox 2.0 tool. This analysis converts the species distribution to a central point (centroid) and creates a vector to describe the direction and magnitude of the change through time (
The results showed that the mean test AUC for Anaka burmensis and Cicadella viridis were 0.887 and 0.869, respectively (Fig.
The current and future potential distribution area for two pests in China was obtained by Maxent model (Figs
The current potential distribution areas for C. viridis in China are projected to be 4.42 × 106 km2 (Table 1), an area which is larger than that projected for A. burmensis. Numerous provincial administrative divisions in central, southern, and northeastern China have become major potential distribution areas for C. viridis, such as Guizhou, Hunan, Hubei, and Heilongjiang (Fig.
In the present study, the Maxent model was used to predict the current and future potential distribution areas of two pests that seriously harm bamboo in China. In addition, the spatial variation of potential distribution areas over time was investigated. The mean AUC and TSS value of five runs of the Maxent model for the two pests was high, suggesting that the constructed models have good performance and usefulness.
This study revealed that precipitation is the most important environmental factor driving the distribution of Anaka burmensis and Cicadella viridis. This is consistent with the findings of previous studies on other pests, such as Moritziella castaneivora Miyazaki, 1968 (
The main distribution range of the current and future potential distribution areas of A. burmensis and C. viridis is the main distribution area of bamboo in China (
Although this study forecasted potential distribution areas for the two pests, the results must be interpreted with caution and some limitations should be acknowledged. All data for the modelling process were derived from GBIF and the literature. It is important to supplement these data with field investigation in future studies and perform the test of prediction. For example, by going to the field where the distribution of the species is predicted, we can confirm that the species is found in the field. Moreover, species distribution is determined by three factors: (1) the capacity to reach a suitable location; (2) the capacity to develop in a certain environmental condition; and (3) the ability to compete with other species occupying the same region (
In summary, the current and future potential distribution areas of Anaka burmensis and Cicadella viridis in China were obtained using the Maxent model. The results of this study demonstrated that precipitation is the most important environmental factor in shaping the distribution of these two pests. In addition, the findings of this study will assist policymakers and governments in developing appropriate measures for managing and controlling A. burmensis and C. viridis, thereby decreasing the damage to bamboo and the associated significant economic loss.
The authors have declared that no competing interests exist.
No ethical statement was reported.
This study was supported by the National Natural Science Foundation of China (no. 31860209) and the Science and Technology Support Program of Guizhou Province (no. 20201Y129).
Zhengxue Zhao: distribute data collection, data analysis, and manuscript writing. Lin Yang and Xiangsheng Chen: manuscript revising.
Zhengxue Zhao https://orcid.org/0000-0003-1764-8690
All of the data that support the findings of this study are available in the main text or Supplementary Information.
Supplemenatry data
Data type: xlsx