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Global Cropland Connectivity: A Risk Factor for Invasion and Saturation by Emerging Pathogens and Pests.
Yanru Xing1, John F Hernandez Nopsa2, Kelsey F Andersen1
1Plant Pathology Department, Institute for Sustainable Food Systems, and Emerging Pathogens Institute at University of Florida, Gainesville, USA.
Bioscience
|September 25, 2020
Summary
Understanding cropland networks helps manage crop pests. This study maps global connectivity for key tropical crops, identifying high-risk areas for surveillance and pest mitigation strategies.
Area of Science:
- Agricultural science
- Ecology
- Risk assessment
Background:
- Geographic cropland patterns influence pest and pathogen spread.
- Understanding crop networks is crucial for effective pest management and sampling.
- Key vegetatively propagated crops are vital for tropical food security.
Purpose of the Study:
- To evaluate global cropland connectivity networks for major tropical crops.
- To identify high-risk "hub" and "bridge" locations for pest surveillance.
- To develop risk maps for pathogen and arthropod movement.
Main Methods:
- Utilized a gravity model to assess potential crop movement between locations.
- Quantified uncertainty associated with movement estimations.
- Mapped cropland connectivity for banana, cassava, potato, sweet potato, and yam.
Main Results:
- Identified critical "hub" and "bridge" locations in crop connectivity networks.
- Highlighted important locations for pest management beyond mere crop density.
- Developed cropland connectivity risk maps.
Conclusions:
- Cropland connectivity maps offer a novel risk factor for pest assessment.
- These maps aid in prioritizing surveillance and management efforts.
- Integration with climate, genetics, and trade data enhances pest risk analysis.
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