Delta de l'ebre @en

A study published in the journal Organisms Diversity & Evolution has shown that it is variation between populations and not, as previously thought, between sexes that determines whether Hermann’s tortoises have four or five digits on their front feet.

Partially managing rivers to make them cleaner only by reducing the amount of phosphorus and phytoplankton, can entail undesirable changes throughout the ecosystem due to a nutrient imbalance. This is the main result of a study by researchers Carles Ibáñez at IRTA and Josep Peñuelas, CSIC researcher at CREAF, which was published by Science.