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<p>Bees are efficient pollinators of crops, fruits and wild plants. However, despite their invaluable pollination service, basic distributional patterns of bees in northeast Indian part of the Himalaya and Indo-Burma biodiversity hotspot are data deficient. To meet this need, the present study during 2018–2021 comprehensively mapped bee distribution and diversity in Arunachal Pradesh and adjoining areas in northeast India. Environmental parameters (altitude, temperature, humidity, sunlight intensity) were monitored alongside bee surveys. During the survey covering altitude from 78 to 4,266.5&#xa0;m above mean sea level (asl), 63 bee species of five families were documented. The chosen environmental parameters showed autocorrelation and altitude seems to be the most influential factor. Some species displayed specific niche distribution, highlighting the importance of specific locations for conservation. Five Apidae bees and one Andrenidae bee, exhibited a clear correlation with altitude. <i>Apis cerana</i> had the highest species frequency and population density. Twenty-four species were recorded exclusively below 1,000&#xa0;m asl, and another 24 species were found exclusively above this altitude, while 15 species occurred in both altitudinal zones. Sites situated above 1,000&#xa0;m exhibited higher values of both Shannon and Simpson indices, indicating greater species diversity and evenness compared to lower elevations. The species accumulation, rarefaction, and extrapolation curves indicated the potential presence of additional species in regions above 1,000&#xa0;m asl. The study showed unique altitude-based distribution patterns for different species and wide variation of altitude might shape rich diversity of bees in the studied region.</p>

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Distribution of bees in Arunachal Himalaya and adjoining areas in Northeast India

  • 期刊论文

  • 发表日期：

    2026年6月17日

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  • Nyabin Riso,
  • Chihi Umbrey,
  • Amarnath Karmakar,
  • Dipakshi Phukan,
  • Jagdish Saini,
  • Hiren Gogoi

摘要

Bees are efficient pollinators of crops, fruits and wild plants. However, despite their invaluable pollination service, basic distributional patterns of bees in northeast Indian part of the Himalaya and Indo-Burma biodiversity hotspot are data deficient. To meet this need, the present study during 2018–2021 comprehensively mapped bee distribution and diversity in Arunachal Pradesh and adjoining areas in northeast India. Environmental parameters (altitude, temperature, humidity, sunlight intensity) were monitored alongside bee surveys. During the survey covering altitude from 78 to 4,266.5 m above mean sea level (asl), 63 bee species of five families were documented. The chosen environmental parameters showed autocorrelation and altitude seems to be the most influential factor. Some species displayed specific niche distribution, highlighting the importance of specific locations for conservation. Five Apidae bees and one Andrenidae bee, exhibited a clear correlation with altitude. Apis cerana had the highest species frequency and population density. Twenty-four species were recorded exclusively below 1,000 m asl, and another 24 species were found exclusively above this altitude, while 15 species occurred in both altitudinal zones. Sites situated above 1,000 m exhibited higher values of both Shannon and Simpson indices, indicating greater species diversity and evenness compared to lower elevations. The species accumulation, rarefaction, and extrapolation curves indicated the potential presence of additional species in regions above 1,000 m asl. The study showed unique altitude-based distribution patterns for different species and wide variation of altitude might shape rich diversity of bees in the studied region.