<p>Syrphid flies enhance agroecosystem stability by promoting pollination and controlling pests, supporting sustainable crop production. This study assessed syrphid fly diversity, density, and plant–flower visitor interactions across five distinct habitats in the Terai Arc region of Uttarakhand. A total of 24 syrphid fly species associated with 39 focal plant species from 18 families were recorded, with 538 specimens classified into two subfamilies: Syrphinae (61%) and Eristalinae (39%). Species density patterns revealed the dominance of <i>Episyrphus viridaureus</i> and <i>Episyrphus balteatus</i> in fruit crops and agricultural sites. The Shannon–Wiener and Simpson’s diversity indices highlighted Site 5 (vegetable crops) as the most diverse, while Site 2 (fruit crops) exhibited the lowest diversity. Bipartite network analysis revealed varying interaction strengths, with the highest levels in Site 1 (agricultural crops), Site 4 (ornamental plants), reduced interactions in Site 2 (fruit crop), and Site 3 (mixed floral). Cluster analysis identified <i>Episyrphus viridaureus</i> and <i>Episyrphus balteatus</i> as species with the highest visitation strength in specific habitats. These findings emphasize the importance of habitat characteristics in shaping syrphid fly diversity and interactions. The study provides a crucial baseline for future research and underscores the need for targeted habitat management practices to support syrphid fly populations and enhance ecosystem services, including promoting pollination and natural pest control in agricultural landscapes.</p>

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Unveiling the ecological importance of syrphid flies as flower visitor in the Northwestern Indian Himalayan Terai ecosystem

  • Avinash Udikeri,
  • Mohammad Sarfraz Khan,
  • Mudagadde G. Deeksha,
  • S. S. Anooj,
  • Sahana N. Banakar

摘要

Syrphid flies enhance agroecosystem stability by promoting pollination and controlling pests, supporting sustainable crop production. This study assessed syrphid fly diversity, density, and plant–flower visitor interactions across five distinct habitats in the Terai Arc region of Uttarakhand. A total of 24 syrphid fly species associated with 39 focal plant species from 18 families were recorded, with 538 specimens classified into two subfamilies: Syrphinae (61%) and Eristalinae (39%). Species density patterns revealed the dominance of Episyrphus viridaureus and Episyrphus balteatus in fruit crops and agricultural sites. The Shannon–Wiener and Simpson’s diversity indices highlighted Site 5 (vegetable crops) as the most diverse, while Site 2 (fruit crops) exhibited the lowest diversity. Bipartite network analysis revealed varying interaction strengths, with the highest levels in Site 1 (agricultural crops), Site 4 (ornamental plants), reduced interactions in Site 2 (fruit crop), and Site 3 (mixed floral). Cluster analysis identified Episyrphus viridaureus and Episyrphus balteatus as species with the highest visitation strength in specific habitats. These findings emphasize the importance of habitat characteristics in shaping syrphid fly diversity and interactions. The study provides a crucial baseline for future research and underscores the need for targeted habitat management practices to support syrphid fly populations and enhance ecosystem services, including promoting pollination and natural pest control in agricultural landscapes.