Introduction A group of brown algae, known as rockweeds, influence rocky shore ecosystems as ‘foundation species’ by increasing habitat complexity and ameliorating environmental stressors for other species. Rocky shore habitats shaped by foundational canopy-forming rockweed species are threatened by human disturbance and climate change impacts. Thus, it is of pressing conservation concern to understand how changes in rockweed...

An increasing number of studies are simultaneously investigating species diversity ( SD ) and genetic diversity ( GD ) in the same systems, looking for ‘species– genetic diversity correlations’ ( SGDC s). From negative to positive SGDC s have been reported, but studies have generally not quantified the processes underlying these correlations. They were also mostly conducted at large biogeographical scales or in recently degrad...

The metapopulation concept is a cornerstone in the recent history of ecology and evolution. However, determining whether a natural system fits a metapopulation model is a complex issue. Extinction‐colonization dynamics are indeed often difficult to quantify because species detectability is not always 100%, resulting in an imperfect record of extinctions. Here, we explore whether combining population genetics with demographic a...