Postfire nitrogen balance of Mediterranean shrublands: Direct combustion losses versus gaseous and leaching losses from the postfire soil mineral nitrogen flush

Michael Dannenmann, Eugenio Diaz-Pines, Barbara Kitzler, Kristiina Karhu, Javier Tejedor, Per Ambus, Antonio Parra, Laura Sanchez-Martin, Victor Resco, David A. Ramirez, Luciano Povoas-Guimaraes, Georg Willibald, Rainer Gasche, Sophie Zechmeister-Boltenstern, David Kraus, Simona Castaldi, Antonio Vallejo, Agustin Rubio, Jose M. Moreno, Klaus Butterbach-Bahl