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<p>The Amazon hosts a wide range of phytophysiognomies, with high environmental heterogeneity at local and regional scales. Along the Amazon coast, mangroves dominate, while seasonally flooded forests influenced by tides, such as estuarine floodplain (várzea)&#xa0;forests, cover about 20% of the forest area. In this study, we used the natural spatial arrangement of these two phytophysiognomies types to investigate the structure of social wasp assemblages at both local and regional scales. Sampling was carried out at 37 sites along the eastern coast of fluviomarine&#xa0;Marajó Island, Pará, Brazil, using Malaise flight-interception traps. We analyzed species richness and partitioned beta diversity into turnover and nestedness components, also assessing the contribution of unique sites to regional beta diversity (LCBD). A total of 13 species were recorded, with mangroves (n = 12) and estuarine floodplain&#xa0;(várzea) (n = 11) showing statistically similar richness, possibly influenced by the use of a single sampling method. Species turnover was the dominant component of beta diversity in all datasets, and the highest LCBD values occurred in mangroves, although this difference was not statistically significant compared to estuarine floodplain&#xa0;(várzea). These findings suggest that the high mobility of social wasps may have promoted greater species turnover between habitats while reducing differences in LCBD values. We conclude that, at a local scale, heterogeneity between mangroves and estuarine floodplain&#xa0;(várzea) exerts limited influence on the structure of social wasp assemblages, whereas, at a regional scale, species composition appears to be strongly shaped by the dispersal capacity of these insects.</p>

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Between tides and forests: diversity of social wasps (Vespidae: Polistinae) on the Brazilian Amazon coast

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • José de J. Corrêa-Neto,
  • Alexandre Somavilla,
  • Marcio Luiz de Oliveira

摘要

The Amazon hosts a wide range of phytophysiognomies, with high environmental heterogeneity at local and regional scales. Along the Amazon coast, mangroves dominate, while seasonally flooded forests influenced by tides, such as estuarine floodplain (várzea) forests, cover about 20% of the forest area. In this study, we used the natural spatial arrangement of these two phytophysiognomies types to investigate the structure of social wasp assemblages at both local and regional scales. Sampling was carried out at 37 sites along the eastern coast of fluviomarine Marajó Island, Pará, Brazil, using Malaise flight-interception traps. We analyzed species richness and partitioned beta diversity into turnover and nestedness components, also assessing the contribution of unique sites to regional beta diversity (LCBD). A total of 13 species were recorded, with mangroves (n = 12) and estuarine floodplain (várzea) (n = 11) showing statistically similar richness, possibly influenced by the use of a single sampling method. Species turnover was the dominant component of beta diversity in all datasets, and the highest LCBD values occurred in mangroves, although this difference was not statistically significant compared to estuarine floodplain (várzea). These findings suggest that the high mobility of social wasps may have promoted greater species turnover between habitats while reducing differences in LCBD values. We conclude that, at a local scale, heterogeneity between mangroves and estuarine floodplain (várzea) exerts limited influence on the structure of social wasp assemblages, whereas, at a regional scale, species composition appears to be strongly shaped by the dispersal capacity of these insects.