Abstract
Variations in climatic conditions over space and time play an important role in speciation. In this study, climate variables that may be influencing the evolution of the genus Neurergus were explored at both interspecific levels for the four recognized species (N. strauchii, N. crocatus, N. derjugini, and N. kaiseri) and intraspecific levels for three of the species. This was accomplished by predictions in geographical (G)-space using an ensemble of ten algorithms and ordination techniques, which included equivalency and background statistics of niche overlap and niche divergence tests in environmental (E)-space. At the interspecific level, results revealed significant evidence for niche divergence in species’ bioclimatic preferences, supporting the hypothesis that niche divergence drives Neurergus diversification. These patterns, however, were not found at the intraspecific level and were identical in their environmental niches. Results of the present study provide an important insight into the evolutionary history of Neurergus in the Near East and help to elucidate how environmental changes contributed to lineage diversification.
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Availability of data and material
Bioclimatic variables data with a 30-second spatial resolution (~ 1 km) are available in climatologies at high resolution for the earth’s land surface areas (CHELSA) for 1979–2013 (https://chelsa-climate.org/bioclim/). Due to the sensibility of Neurergus populations, species occurrence records are available under-motivated requests to s.vaissi@razi.ac.ir.
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Vaissi, S. The role of climatic niche divergence in the speciation of the genus Neurergus: An inter-and intraspecific survey. Evol Ecol 36, 389–407 (2022). https://doi.org/10.1007/s10682-022-10172-x
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DOI: https://doi.org/10.1007/s10682-022-10172-x