“…While some studies have found correlations between cytotype distribution and climate variables and differences in habitat conditions between cytotypes (e.g., Raabová et al., ; Kolář et al., ; Sonnleitner et al., ; Ramsey, ; Richardson and Hanks, ; Mráz et al., ; McAllister et al., ; Visger et al., ; Muñoz‐Pajares et al., ), others have found evidence for shared broad‐scale climatic niches between cytotypes and no evidence for differences in climatic requirements (Godsoe et al., ; Glennon et al., and references therein). Ideally, the study of niche differentiation would include experiments testing the effects of environmental factors on different cytotypes, but there are not many studies involving such experiments (Ramsey, ; Kolář et al., ; McIntyre and Strauss, ). As polyploidization can also drive changes in phenotypic traits in natural populations (Comai, ; Chen and Sun, ), the study of phenotypic differences between different cytotypes may be important to understand their ecology (Segraves et al., ; Nuismer and Cunningham, ; Münzbergova, ).…”