Sawtooth oak, as the native deciduous broadleaf tree, its growth, reproduction and distribution accommodate to local environment such as climate and soil conditions.

而麻栎作为山东省的典型的、地带性的乡土落叶阔叶树种，其生长、发育、繁衍和分布与当地的生态条件，特别是气候和土壤条件相适应。

The pollen concentration and percentage of broadleaf tree pollen in Zone II(6.6-5.7 cal kyr BP) abrupt decreased and the percentage of conifer tree pollen relatively increase compared with Zone I .

带Ⅱ(6.6-5.7cal kyr BP)花粉总浓度和阔叶树花粉含量快速下降，以松属和云杉属为主的针叶树花粉含量相对增加。