The blue crab colonized the Ebro Delta and surrounding waters in only two years of an exponential expansion, which started five years after the first detection. A study led by the Doñana Biological Station – CSIC and the Ebro Delta Natural Park shows that the expansion and the abundance increase of the blue crab have caused multiple, rapid and severe declines, including some affecting endangered species. The blue crab has rapidly become a keystone species in the Ebro Delta and can have...

A study led by the Doñana Biological Station (EBD-CSIC) and the Pyrenean Institute of Ecology (IPE-CSIC) concludes that stopping winter floods of rice field in the Ebro Delta, a management to control the invasion of the apple snail, have not had an impact to date on the abundance of many waterbirds species wintering in the area.
This apple snail control has been highly controversial due to its potential side effects on waterbird conservation. However, by assessing long series of...