Sympatric Sympatric speciation may occur where there is no speciation geographical separation between the speciating populations of habitat preference Whether sympatric speciation happens at all is a contentious issue, although rapid changes in the host preference of phytophagous insects has been observed. Plants can undergo sympatric speciation through polyploidy Related topics Adaptation(B1) Genetic variation(Ol)Related topics Adaptation (B1) Genetic variation(O1) Sympatric speciation Sympatric speciation may occur where there is no geographical separation between the speciating populations of habitat preference. Whether sympatric speciation happens at all is a contentious issue, although rapid changes in the host preference of phytophagous insects has been observed. Plants can undergo sympatric speciation through polyploidy