Organisms Diversity & Evolution

, Volume 17, Issue 1, pp 251–265

Sympatric lineage divergence in cryptic Neotropical sweat bees (Hymenoptera: Halictidae: Lasioglossum)

  • Patricia Landaverde-González
  • Humberto Moo-Valle
  • Tomás E. Murray
  • Robert J. Paxton
  • José Javier G. Quezada-Euán
  • Martin Husemann
Original Article

Abstract

Given ongoing biodiversity decline, an important concern is that a large fraction of species diversity is not yet documented. Correct delimitation of species remains a challenge, especially for small and morphologically uniform groups such as sweat bees (Halictidae). Here, we applied an integrative taxonomic approach to study diversity within the Neotropical sweat bee subgenus Dialictus (genus Lasioglossum). We used four statistical methods to delimit species based on cytochrome oxidase subunit I gene sequences: Automatic Barcode Gap Discovery (ABGD), two variants of the General Mixed Yule Coalescent (single-threshold (stGMYC) and Bayesian (bGMYC)) and the Refined Single Linkage analysis (RESL). We detected eight principal molecular operational taxonomic units (mOTUs). Subsequently, these lineages were evaluated using ten nuclear microsatellite loci and morphological and ecological analyses. Most mOTUs could be differentiated using microsatellites and morphology (82 % identified correctly), further supporting the status of mOTUs as independent biological units. For the two most widespread mOTUs, we analysed intra-lineage geographic variation using microsatellites but did not detect additional substructuring. We further tested if the lineages showed predictable patterns of co-occurrence and habitat preferences. While we did not find any evidence of preferential association or disassociation between taxa, we detected a slight positive effect of high crop cover favouring the abundance of some lineages. We show that integrated approaches using statistical analysis of DNA barcodes jointly with additional data can provide robust and objective means of delimiting species in morphologically difficult groups.

Keywords

Biodiversity Co-occurrence DNA barcoding Species delimitation Yucatan Peninsula 

Supplementary material

13127_2016_307_MOESM1_ESM.doc (1016 kb)
ESM 1(DOC 1015 kb)

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Copyright information

© Gesellschaft für Biologische Systematik 2016

Authors and Affiliations

  • Patricia Landaverde-González
    • 1
  • Humberto Moo-Valle
    • 2
  • Tomás E. Murray
    • 1
    • 3
  • Robert J. Paxton
    • 1
    • 4
  • José Javier G. Quezada-Euán
    • 2
  • Martin Husemann
    • 1
    • 5
  1. 1.General Zoology, Institute for BiologyMartin-Luther University Halle-WittenbergHalle (Saale)Germany
  2. 2.Departamento de Apicultura Tropical, Campus Ciencias Biológicas y AgropecuariasUniversidad Autónoma de YucatánMéridaMexico
  3. 3.National Biodiversity Data CentreWaterfordIreland
  4. 4.German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-LeipzigLeipzigGermany
  5. 5.Centrum für NaturkundeUniversity of HamburgHamburgGermany

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