中文摘要：

森林生态效益外部性具有数量庞大、时空转移性、持续复杂性等特征。森林生态效益外部性内在化是一个动态发展的过程。在对森林生态效益按其权属划分为宏观（国家级生态公益林生态效益）、中观（省、市级生态公益林森林效益）和微观（林业企业、基层林场）3个层次基础上，对各层次外部性和各类外部性应采取不同形式、不同程度的内在化途径。

英文摘要：

The forest ecosystem externalities feature large volume, space-time transfer, continuance and complexity. The internalization of forest ecosystem externalities is a dynamic and developmental process. Forest coo-efficiency can be classified into three levels, namely, the macro-forests （national public ecological welfare forest）, meso-forests （provincial and civic public ecological welfare forest）, and micro-forests （such as forestry enterprises and forest farms）. The means and extent of internalization of forest ecosystem externalities vary with the levels and forms of forest ecosystem externalities.