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Do Distinct Biomes Influence the Cuticular Chemical Profile in Orchid Bees?

A B Santos1, F S Nascimento1

  • 1Laboratório de Comportamento e Ecologia de Insetos Sociais, Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo. Av. Bandeirantes, 3900, CEP 14040-901, Ribeirão Preto, São Paulo, Brazil (alineborba.s@hotmail.com; fsnascim@usp.br).

Environmental Entomology
|March 24, 2017
PubMed
Summary

The cuticular chemical profiles of Euglossa cordata orchid bees were analyzed across different Brazilian biomes and seasons. Results indicate stable epicuticular compounds despite environmental variations, suggesting resilience in these chemical defenses.

Keywords:
Euglossa cordatachemical profilecuticular hydrocarbon

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Area of Science:

  • * Entomology and Chemical Ecology: Investigating the chemical composition of insect cuticles.

Background:

  • * The cuticular chemical profile of Euglossa cordata (orchid bees) males is crucial for species recognition and ecological interactions.
  • * Understanding how environmental factors like biome and season influence these chemical profiles is key to understanding bee resilience.

Purpose of the Study:

  • * To analyze the cuticular chemical profiles of Euglossa cordata males.
  • * To determine the effect of ecological predictors (biome and season) on the composition and relative proportion of these compounds.

Main Methods:

  • * Collection of Euglossa cordata males from Caatinga and Atlantic Forest biomes in Brazil.
  • * Analysis of cuticular extracts using gas chromatography-mass spectrometry to identify and quantify chemical compounds.

Main Results:

  • * Identification of 48 compounds, predominantly hydrocarbons (71.39%), acetates (16.79%), and esters (10.5%).
  • * No significant qualitative differentiation in cuticular compounds was observed between biomes.
  • * Minor quantitative variations in specific alkanes were detected between biomes, but overall profiles remained consistent.

Conclusions:

  • * The epicuticular chemical profile of Euglossa cordata males demonstrates remarkable stability across different biomes and seasons.
  • * These findings suggest that the bees' chemical defenses are resilient to environmental variability.