Cyclic population fluctuations of herbivores as an effect of cyclic seed cropping of plants: the mast depression hypothesis

animales de caza betula pubescens campagnol crecimiento croissance cultivos de semillas dynamique des populations environmental factors exportaciones exportation exports facteur du milieu factores ambientales game gibier grouse growth hawks herbivore herbivores leming lemming lemmings lepidoptera noruega norway picea abies population dynamics porte graines production de semences reproduction seasonal variation seed crops seed production sorbus aucuparia topillos urogallo vaccinium myrtillus vaccinium vitis idaea voles