Science. 1970 Dec 11;170(3963):1210-2. doi: 10.1126/science.170.3963.1210.
Between shrub and grass communities in coastal California there is a zone that is normally bare of vegetation. Previous studies have emphasized the role of volatile inhibitors of plant growth in producing this bare zone. However, there is a concentration of feeding activity by rodents, rabbits, and birds in this zone; if this activity is prevented by means of wire-mesh exclosures, annuals grow in the bare zone. Thus, animal activity is sufficient to produce the bare zone.
在加利福尼亚沿海的灌木和草地群落之间，有一个通常没有植被的区域。之前的研究强调了挥发性植物生长抑制剂在产生这个无植被区域中的作用。然而，在这个区域中，啮齿动物、兔子和鸟类的取食活动非常集中；如果通过铁丝网围栏来阻止这种活动，一年生植物就会在无植被区域中生长。因此，动物的活动足以产生这个无植被区域。
