Data from: Disentangling the drivers of invasion spread in a vector-borne tree disease
| Main Authors: | Osada, Yutaka, Yamakita, Takehisa, Shoda-Kagaya, Etsuko, Liebhold, Andrew M., Yamanaka, Takehiko |
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| Format: | info dataset Journal |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5012784 |
Daftar Isi:
- 1. Pine wilt disease (PWD) invaded southern Japan in the early 1900's and has gradually expanded its range to northern Honshu (Japanese mainland). The disease is caused by a pathogenic North American nematode, which is transmitted by native pine sawyer beetles. Recently the disease has invaded other portions of East Asia and Europe where extensive mortality of host pines is anticipated to resemble historical patterns seen in Japan. 2. There is a critical need to identify the main drivers of PWD invasion spread so as to predict future spread and evaluate containment strategies in newly invaded world regions. But the coupling of pathogen and vector population dynamics introduces considerable complexity that is important for understanding this and other plant disease invasions. 3. In this study, we analysed historical (1980-2011) records of PWD infection and vector abundance, which were spatially extensive but recorded at coarse categorical levels (none, low and high) across 403 municipalities in northern Honshu. We employed a multistate occupancy model that accounted both for demographic stochasticity and observation errors in categorical data. 4. Analysis revealed that sparse sawyer populations had lower probabilities of transition to high abundance than did more abundant populations even when regional abundance stayed the same, suggesting the existence of positive density dependence, i.e. an Allee effect, in sawyer dynamics. Climatic conditions (average accumulated degree days) substantially limited invasion spread in northern regions, but this climatic influence on sawyer dynamics was generally weaker than the Allee effect. 5. Our results suggest that tactics (e.g., sanitation logging of infected pines) which strengthen Allee effects in sawyer dynamics may be effective strategies for slowing the spread of PWD.
- Pine wilt disease and vector beetle records in northern JapanThis is the Microsoft excel file containing the information of the incidences of pine wilt disease, of the abundance of sawyers and of the location. All the data of PWD incidences and sawyer densities were extracted from FFPRI repository (https://www.ffpri.affrc.go.jp/pubs/bulletin/433/documents/433-9.pdf) (Forest Conservation Departmental Meeting of Tohoku Forestry Research Institute Liaison Council, 2008, 2014). The "pwd" sheet has the abundance of newly infected trees, 0 (0 infected trees / municipality), 1 (1-10 trees / municipality), 2 (11-100 trees / municipality) and 3 (>100 trees / municipality) in each year (column) at each municipality (row). The "beetle" sheet has the abundance of sawyers, 0 (0 sawyer), 1 (low abundance) and 2 (high abundance) in each year (column) at each municipality (row). The "info" sheet has the information of the municipalities. Citycode is the municipality codes used in the other sheets. The Lon and Lat are the longitude and the latitude of the centroids of the municipalities in JGD2011 (The Japanese Geodetic Datum 2011), respectively. Municipality is the names of municipalities in each District of each Prefecture. Villages and towns are classified in Districts but cities are directly belonging to Prefectures.2018OsadaJAE.Ver2.xlsx