| Autor: |
Narváez-Barandica JC; Centro de Genética y Biología Molecular, Universidad del Magdalena, Carrera 32 No 22-08, Santa Marta 470004, Colombia., Quintero-Galvis JF; Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5110566, Chile., Aguirre-Pabón JC; Centro de Genética y Biología Molecular, Universidad del Magdalena, Carrera 32 No 22-08, Santa Marta 470004, Colombia., Castro LR; Centro de Genética y Biología Molecular, Universidad del Magdalena, Carrera 32 No 22-08, Santa Marta 470004, Colombia., Betancur R; Biology Department, University of Oklahoma, Norman, OK 73019, USA., Acero Pizarro A; Instituto de Estudios en Ciencias del Mar (CECIMAR), Universidad Nacional de Colombia sede Caribe, Santa Marta 470006, Colombia. |
| Abstrakt: |
The comparative phylogeography of marine species with contrasting dispersal potential across the southern Caribbean Sea was evaluated by the presence of two putative barriers: the Magdalena River plume (MRP) and the combination of the absence of a rocky bottom and the almost permanent upwelling in the La Guajira Peninsula (ARB + PUG). Three species with varying biological and ecological characteristics (i.e., dispersal potentials) that inhabit shallow rocky bottoms were selected: Cittarium pica (PLD < 6 days), Acanthemblemaria rivasi (PLD < 22 days), and Nerita tessellata (PLD > 60 days). We generated a set of SNPs for the three species using the ddRad-seq technique. Samples of each species were collected in five locations from Capurganá to La Guajira. For the first time, evidence of a phylogeographic break caused by the MRP is provided, mainly for A. rivasi (AMOVA: Φ CT = 0.420). The ARB + PUG barrier causes another break for A. rivasi (Φ CT = 0.406) and C. pica (Φ CT = 0.224). Three populations ( K = 3) were identified for A. rivasi and C. pica , while N. tessellata presented one population ( K = 1). The Mantel correlogram indicated that A. rivasi and C. pica fit the hierarchical population model, and only the A. rivasi and C. pica comparisons showed phylogeographic congruence. Our results demonstrate how the biological traits of these three species and the biogeographic barriers have influenced their phylogeographic structure. |
