Exact(4)
As climatic differentiation increased over the course of the Cenozoic, flora became more and more provincial.
In addition to the ITCZ, elevation and proximity to the Atlantic Ocean and its maritime influences also act as factors of climatic differentiation.
Only a minor increase in rates of climatic differentiation between the sister species C. erubescens and C. crassifolia was detected (see Fig. 4).
Our results for climatic differentiation suggest an early biome separation of the CCN clades (BAF and the rest of the Neotropics), followed by a divergence along different local conditions of precipitation seasonality.
Similar(56)
Current species distributions of Fucus suggest that climatic factors promoted differentiation between the two major clades, while the recent and rapid species radiation in the temperate clade during Pleistocene glacial cycles coincided with several potential speciation drivers.
In particular, is there evidence for adaptive differentiation along climatic gradients for the rare S. sponhemica?
In this study we aim to detect the genetic signatures that identify the geographic, edaphic and climatic factors leading to differentiation between Waratah populations.
Understanding how these morphological or climatic axes of niche differentiation have evolved in this plant group could shed light on the way speciation processes are building Neotropical biodiversity.
Moreover, minimum sea temperatures at collection sites differ significantly between mtDNA lineages (figure 2, U test, p < 0.05) which altogether suggest a strong climatic influence on genetic differentiation (comparisons to the TET lineage were not significant due to the wide range of its two representatives).
Clearly, a larger sample of genotypes will be necessary to determine whether there is some relationship with geographical distance, whether there is isolation of populations due to barriers in gene flow, or whether different climatic conditions lead to differentiation within the species.
Moreover, due to its narrow habitat requirements, S. sponhemica is a good model species for studying the effect of climatic gradients on genetic differentiation in rare plants, because there is likely to be little variation in habitat conditions apart from climate.
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