Science. 1976 Jan 9;191(4222):92-4. doi: 10.1126/science.191.4222.92.
Dense concentrations of migratory wildebeest leaving the Serengeti Plains in late May 1974 reduced green plant biomass by almost 400 grams per square meter, 85 percent of the initial standing crop. However, this grazing prevented senescence and stimulated net primary productivity of the grasslands. Thomson's gazelles leaving the plains a month later were significantly associated with areas previously grazed by wildebeest, and this association was still evident at the end of the dry season, 6 months later.
1974 年 5 月底，大批迁徙的角马离开塞伦盖蒂平原，导致每平方米绿色植物生物量减少近 400 克，为初始生物量的 85%。然而，这种放牧行为防止了草的衰老，并刺激了草原的净初级生产力。一个月后离开平原的汤姆森瞪羚与之前被角马放牧过的地区有明显的联系，这种联系在 6 个月后的旱季末期仍然很明显。
