长白山自然保护区位于以白头山天池为中心,围绕天池北、西、东三面的长白山原始森林的心脏地区,是我国面积最大、自然环境和生态系统保持比较完整的自然保护区。经国务院批准,联合国教科文组织《人与生物圈》理事会执行局通过,我国长白山、卧龙、鼎湖山三处自然保护区被列为国际生物圈保护区。

The Changbai Mountain Nature Keserve is one ot the nature reserve of the MAB Programme. The whole ecosystem appears to be vertically differentiated into zones. This study shows that in the ecological environment, not only the composition and content of chemical element have obvious areal diferentiation, but also the migration, exchange and cycling of chemical elements in each vertical zone are clearly different.In the rock soil and plant of different vertical zones of Changbai Mountain, the changes of Zn and Pb content apparently and consistently present positive abnormality, while the changes of Cr and Xi content present negative abnormality; so that this region should, be called the bio-geochemistry region with high Zn. Pb content and low Cr, Xi content.The chemical composition and content of the- rock and soil in the Alpine tundra zone is similar to those of the rock and soil in the Ermans Birch zone, both of them have higher K, Xa contents and lower Ca. Mg, Fe, Mn contents. And contrary to the contents of those chemical compositions of the rock and soil in the coniferous and broad-leaved mixed forest zone, where has lower K. Xa contents and higher Ca, Mg, Fe, Mn contents. This difference is mainly resulted from different mineral composition of base rock.The bio-concentrative characteristics of trace elements in each zone are different too. Some elements are of lower content in rock and soil, but of higher content in plants. It indicates that those elements are bioelements to plant. Of course, these bioelements assimilated from environment by plant are only in limited amount; it indicates that the element content in plant is not in a simple linear relationship to the ele-