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Abstract <p>Understanding community changes in insect pollinators is challenging but essential to accurately evaluate ecosystem function and services under environmental changes. With historical datasets generally scarce in the Asian tropics, most resampling studies have focused on temperate or neotropical pollinators. Here, by resampling a native bee community sampled during 1993–1994 across habitat types in a seasonal tropical evergreen rainforest in China, we investigated diversity and community structure changes over 30 years. Although the current survey recorded over 40% higher species richness than historical sampling, after controlling for sampling effort, we found that native bee diversity in general is stable over time across habitats, except for a significant decline of dominant species due to increases of 4 native honeybee (<i>Apis</i> spp.) species in the most species-rich rainforest within the nature reserve. Although we detected significant community composition changes due to species gains from current communities for some sites, these sites were also under-sampled in historical sampling. However, when these under-sampled sites were removed and all habitats were combined, community structure did change. Despite our study areas showing increased mean air temperature and decreased accumulated precipitation change over the years, the effects of climates behind our observed difference are uncertain. Our results demonstrate the complexity of native bees’ community changes in different habitats in Asian tropics and highlight the necessity of mechanistic understanding of tropical pollinators’ responses to environmental changes.</p> Implications for insect conservation <p>Our results show that the native bee community changes are consistently stable across different tropical habitats in Asia over past 30 years, and culturally important forests are important in conserving native bee diversity. Continuous monitoring of native bees in the region is necessary particularly for <i>Apis</i> spp. to confirm the long-term trends and make conservation interventions.</p>

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Resampling native bee communities over 30 years showed stable trends along a tropical forest disturbance gradient

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Qiaoyi Nong,
  • Xiaojian Chen,
  • Molin Hou,
  • Da-Rong Yang,
  • Michael C. Orr,
  • Bai-Ge Miao,
  • Cheng Wenda,
  • Yan-Qiong Peng

摘要

Abstract

Understanding community changes in insect pollinators is challenging but essential to accurately evaluate ecosystem function and services under environmental changes. With historical datasets generally scarce in the Asian tropics, most resampling studies have focused on temperate or neotropical pollinators. Here, by resampling a native bee community sampled during 1993–1994 across habitat types in a seasonal tropical evergreen rainforest in China, we investigated diversity and community structure changes over 30 years. Although the current survey recorded over 40% higher species richness than historical sampling, after controlling for sampling effort, we found that native bee diversity in general is stable over time across habitats, except for a significant decline of dominant species due to increases of 4 native honeybee (Apis spp.) species in the most species-rich rainforest within the nature reserve. Although we detected significant community composition changes due to species gains from current communities for some sites, these sites were also under-sampled in historical sampling. However, when these under-sampled sites were removed and all habitats were combined, community structure did change. Despite our study areas showing increased mean air temperature and decreased accumulated precipitation change over the years, the effects of climates behind our observed difference are uncertain. Our results demonstrate the complexity of native bees’ community changes in different habitats in Asian tropics and highlight the necessity of mechanistic understanding of tropical pollinators’ responses to environmental changes.

Implications for insect conservation

Our results show that the native bee community changes are consistently stable across different tropical habitats in Asia over past 30 years, and culturally important forests are important in conserving native bee diversity. Continuous monitoring of native bees in the region is necessary particularly for Apis spp. to confirm the long-term trends and make conservation interventions.