Nutrient conditions determine the strength of herbivore‐mediated stabilizing feedbacks in barrens oleh Laia Illa‐López, Àlex Aubach‐Masip, Teresa Alcoverro, Giulia Ceccherelli, Luigi Piazzi, Periklis Kleitou, Jorge Santamaría, Jana Verdura, Neus Sanmartí, Elvira Mayol, Xavi Buñuel, Mario Minguito‐Frutos, Fabio Bulleri, Jordi Boada