4.5 Article

Agroforestry orchards support greater butterfly diversity than monoculture plantations in the tropics

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OECOLOGIA
卷 201, 期 3, 页码 863-875

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SPRINGER
DOI: 10.1007/s00442-023-05348-3

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Agricultural landscapes; Biodiversity; Conservation; Tropical forest; Oil palm; Rubber tree

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Large-scale deforestation in the tropics has a negative impact on biodiversity. This study measured the diversity of butterfly species in three agricultural landscapes and found that agroforestry orchards supported the highest number of butterfly species. Factors such as tree height, undergrowth coverage, and elevation influenced butterfly diversity. Management practices, such as ground vegetation management and retaining adjacent forest areas, should be considered to enhance butterfly species richness in agricultural landscapes.
Large-scale deforestation in the tropics, triggered by logging and subsequent agricultural monoculture has a significant adverse impact on biodiversity due to habitat degradation. Here, we measured the diversity of butterfly species in three agricultural landscapes, agroforestry orchards, oil palm, and rubber tree plantations. Butterfly species were counted at 127 sampling points over the course of a year using the point count method. We found that agroforestry orchards supported a greater number of butterfly species (74 species) compared to rubber tree (61 species) and oil palm plantations (54 species) which were dominated by generalist (73%) followed by forest specialists (27%). We found no significant difference of butterfly species composition between agroforestry orchards and rubber tree plantation, with both habitats associated with more butterfly species compared to oil palm plantations. This indicates butterflies were able to persist better in certain agricultural landscapes. GLMMs suggested that tree height, undergrowth coverage and height, and elevation determined butterfly diversity. Butterfly species richness was also influenced by season and landscape-level variables such as proximity to forest, mean NDVI, and habitat. Understanding the factors that contributed to butterfly species richness in an agroecosystem, stakeholders should consider management practices to improve biodiversity conservation such as ground vegetation management and retaining adjacent forest areas to enhance butterfly species richness. Furthermore, our findings suggest that agroforestry system should be considered to enhance biodiversity in agricultural landscapes.

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