Biome variation, not distance between populations, explains morphological variability in the orchid beeEulaema nigrita(Hymenoptera, Apidae, Euglossini)

Author(s)

Costa, Claudineia Pereira ^{[1, 2]} ; Silva Machado, Clycie Aparecida ^[3] ; Souza Santiago, Wellyngton Matheus ^[4] ; Dallacqua, Rodrigo Pires ^[4] ; Garofalo, Carlos Alberto ^[3] ; Francoy, Tiago Mauricio ^[5]

Affiliation

^[1] Univ Sao Paulo, Fac Med Ribeirao Preto, Dept Genet, Ribeirao Preto, SP - Brazil

^[2] Univ Calif Riverside, Dept Entomol, Riverside, CA 92521 - USA

^[3] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Biol, Ribeirao Preto, SP - Brazil

^[4] Univ Fed Mato Grosso do Sul, Inst Biociencias, Campo Grande, MS - Brazil

^[5] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Apidologie; v. 51, n. 6 JUL 2020.
• Web of Science Citations: 0

Abstract

The sampling of orchid bees across different biomes provides an excellent opportunity to analyze morphological variability in this group. We examined the morphological variation of populations ofEulaema nigritain the context of the determination of geographic origin. It also evaluated population variability of this group in different landscapes from two important biomes, Atlantic Forest, Brazilian Savanna, and the transition zone between them. These analyses were achieved by documenting the pattern of morphological differentiation using geometric morphometric analysis of the wings of 256 individuals, sampled from nine locations, from four different physiognomies. Results indicated that individuals from the Atlantic Forest physiognomies are larger than the ones from the Savanna. The clusterization of individuals was based on landscape features of the sampling areas. The results indicate little or even a complete absence of population structure. Overall, site-specific population differentiation is not strongly supported by wing traits, reinforcing the statement consistent with the broader pattern that orchid bees have a high migratory capacity. However, the subtle differentiation may indicate the existence of locally adapted traits kept by female philopatry or phenotypic plasticity triggered by environmental factors yet to be studied. (AU)

• FAPESP's process: 11/07857-9 - Populational characterization of orchid bees (Apidae, Euglossini) from São Paulo State using geometric morphometrics of wings, mitochondrial DNA variability and cuticular hydrocarbons
• Grantee: Tiago Mauricio Francoy
• Support Opportunities: BIOTA-FAPESP Program - Young Investigators Grants
• FAPESP's process: 13/02158-0 - Altitudinal and geographic effects on the genetic variability of orchid bees (Apidae, Euglossini) populations of the State of São Paulo
• Grantee: Claudinéia Pereira Costa
• Support Opportunities: Scholarships in Brazil - Doctorate