August 22, 2019

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    How diverse can rare species be on the margins of genera distribution?

    Many rare or narrowly distributed species show low levels of genetic diversity, whilst species with larger geographic ranges show increased diversity. Species that inhabit the border of the distribution of their respective genera usually have smaller and more fragmented populations and can have fixed locally adapted alleles. Different genetic patterns have been demonstrated for these […] More

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    Drying out defenses: drought reduces tree defense system

    Drought stress is becoming increasingly common with climate change, with negative impacts on tree growth and survival. The mechanisms of drought mortality in trees are often attributed to carbon starvation or hydraulic failure, however disease and herbivory could also cause mortality under drought. For this to happen, tree defense systems against pathogens and herbivores would […] More