The predictable abundance of salmon allowed some native cultures to flourish and dying spawners feed bears, eagles, other animals, and ultimately the soil itself.
The soil of England is fertile, its climate is good, it is capable of affording food in abundance to an enormously greater number of animals than now inhabit it.
英格兰土地肥沃，气候适宜，可以养活比现在生活在这片土地上的动物多得多的动物。
3
The abundance and availability of water and nutrients in a soil ecosystem determine its fertility.