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作为贺兰山自然保护区综考专题之一,1983年以来对森林变迁史作了考察。考察中除了对历史文献的考证外,主要对历史上遗留下来的森林火焚遗迹——古炭核作了研究。采集到古炭核的火灾遗迹有六处如表1。
As one of the comprehensive study topics of Helan Mountain Nature Reserve, the history of forest change has been investigated since 1983. Except for the textual research of historical documents, the study mainly focuses on the remains of the forest left over from history - the ancient carbon core. There are six fire relics collected from ancient charcoal as shown in Table 1.