Flowering plants, with more than ~290,000 species in 435 families, are the dominant and most important group of terrestrial plants. However, the origin and diversification of flowering plants (angiosperms) has been surrounded by controversy ever since Charles Darwin called this an ‘abominable mystery’ back in 1879. As far as the fossil record goes, flowering plants suddenly appeared in the Early Cretaceous (~140 million years ago) and almost immediately (by geological standards) started to diversify dramatically, eventually resulting in one of the most transformative revolutions in Earth’s history. However, the initial burst of diversification of flowering plants did not translate into these being dominant in terrestrial ecosystems. No one knows exactly when this happened or which groups of angiosperms (living or extinct) were involved in the transition to angiosperm-dominated ecosystems as we know today. This is exactly what we wanted to answer in our most recent publication in Nature Ecology and Evolution (Ramírez-Barahona et al. 2020).
Author: ramirezbarahona
Adaptation to climate change in wild maize
Ongoing climate change is one of the most important threats to biodiversity and crop sustainability. The impact of climate change is often evaluated on the basis of expected changes in species’ geographical distributions, yet genomic diversity, local adaptation, and migration are seldom integrated into projections of species responses to climate change.
Continue readingSpatial genetic structure in tree ferns
Spatial genetic structure (SGS) in plants, namely the spatial aggregation of genetically related individuals, has been linked to several biological attributes of species, such as breeding system and life form. However, little is known about SGS in ferns, which together with lycopods are unique among land plants in having two free-living life stages.
Rates of molecular evolution in tree ferns
Variation in the rates of molecular evolution among lineages (heterotachy) has been widely documented throughout the tree of life. However, the processes influencing the speed at which DNA evolves in different lineages are not well understood. Continue reading
