Aims Comparisons of climate envelopes among species have shown that niche conservatism tends to break down over time.Here,we use the Asian tree genus Platycarya(Juglandaceae)as a case study to test this tendency at re...Aims Comparisons of climate envelopes among species have shown that niche conservatism tends to break down over time.Here,we use the Asian tree genus Platycarya(Juglandaceae)as a case study to test this tendency at relatively short timescales in a single lineage.This,together with a reanalysis of the extant literature,should help evaluate prospects of using correlations between climate and spe-cies occurrence data to infer evolutionary processes.Methods We rely on species distribution models(SDMs)and multivari-ate analyses to compare current and past(Last Glacial Maximum~21ka)climatic envelopes between the two extant Platycarya spe-cies(Platycarya strobilacea and Platycarya longipes)and between mainland and Taiwan populations of P.strobilacea,paying particu-lar attention to autocorrelation issues.We also review interpreta-tions provided in similar studies comparing climate envelopes between and within species,including in studies involving native and introduced populations of the same species.Important Findings We find intraspecific but not interspecific differentiation in climate envelopes of Platycarya,despite the prediction that niche differen-tiation should be stronger between older groups.Our review also suggests that differentiation in climate envelopes need not imply rapid evolutionary divergence.Whereas SDMs can be used to raise evolutionary hypotheses to be validated with other data,we con-clude that it should not be used to directly infer short-term evolu-tionary processes.展开更多
基金This work was supported by the National Natural Science Foundation of China[grant numbers 41230101,41472142 and 41472143]and the China Scholarship Council.
文摘Aims Comparisons of climate envelopes among species have shown that niche conservatism tends to break down over time.Here,we use the Asian tree genus Platycarya(Juglandaceae)as a case study to test this tendency at relatively short timescales in a single lineage.This,together with a reanalysis of the extant literature,should help evaluate prospects of using correlations between climate and spe-cies occurrence data to infer evolutionary processes.Methods We rely on species distribution models(SDMs)and multivari-ate analyses to compare current and past(Last Glacial Maximum~21ka)climatic envelopes between the two extant Platycarya spe-cies(Platycarya strobilacea and Platycarya longipes)and between mainland and Taiwan populations of P.strobilacea,paying particu-lar attention to autocorrelation issues.We also review interpreta-tions provided in similar studies comparing climate envelopes between and within species,including in studies involving native and introduced populations of the same species.Important Findings We find intraspecific but not interspecific differentiation in climate envelopes of Platycarya,despite the prediction that niche differen-tiation should be stronger between older groups.Our review also suggests that differentiation in climate envelopes need not imply rapid evolutionary divergence.Whereas SDMs can be used to raise evolutionary hypotheses to be validated with other data,we con-clude that it should not be used to directly infer short-term evolu-tionary processes.
