These declines in turn fostered increased dependence on maize and its exchange and on domesticated turkey, which could be fed maize.
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- 那些不利的趋势也许彼此会产生乘数效果,例如森林慢慢消失之后,很可能使狩猎变得更困难,一些重要的非驯化植物资源,如松子,也随之而去。