Massive die-offs of freshwater bivalves as resource pulses Ronaldo Sousa, Simone Varandas, Rui Cortes, Amílcar Teixeira, Manuel Lopes-Lima, Jorge Machado and Lúcia Guilhermino Ann. Limnol. - Int. J. Lim., 48 1 (2012) 105-112 Published online: 20 March 2012 DOI: 10.1051/limn/2012003