Ecological impact assessment of Nylanderia fulva invasion on insect diversity in agricultural and forest ecosystems

Overview

This research opportunity addresses a critical ecological question about the impact of Nylanderia fulva (tawny crazy ant) invasion on insect biodiversity in agricultural and adjacent forest ecosystems. The study investigates whether farms invaded by this ant show reduced insect diversity compared to uninvaded farms, and examines the likelihood of the ant spreading from agricultural areas into nearby forest habitats. N. fulva is a habitat generalist known to affect crops including oranges, sugar cane, and mangoes, and anecdotal evidence suggests native insects such as leaf-cutter ants disappear where this invasive species is abundant. This research will generate the first systematic data on these ecological interactions.

Technical specifications

The study design involves comparative field sampling across multiple sites:

• Six orange farms will be monitored, divided into three invaded by N. fulva and three free from the ant
• Three forest fragments adjacent to agricultural areas will be included to assess potential invasion into natural habitats
• Thirty pitfall traps and five malaise traps deployed per site, monitored weekly for one year
• Sampling will cover both wet and dry seasons to capture seasonal variation in insect communities
• Insects will be identified to family level
• Data analysis will use cluster and discriminant analyses to compare insect taxonomic composition and abundance across sites
• The study will evaluate both beneficial environmental service-providing species and pest species

Technology readiness level

This is a field-based ecological research study at the proposal stage, ready for implementation. The methodology is well-established using standard entomological sampling techniques (pitfall and malaise traps) and proven analytical approaches (cluster and discriminant analyses). The research addresses two questions that have not been previously examined: the impact of N. fulva on insect taxonomic composition and ecological roles in agricultural systems, and the potential for this invasive ant to spread from farms into natural forest environments. The one-year monitoring period including both wet and dry seasons provides robust seasonal coverage for generating scientifically valid conclusions about invasion ecology and biodiversity impacts.