生态完整性评价的理论和实践

阐述了生态完整性的概念、内涵和评价方法。生态完整性即生态系统结构和功能的完整性，生态完整性评价可从评价区生态系统的生产力和稳定性两个角度进行。然后以原料林基地建设工程为例，进行了生态完整性评价。评价结果表明，工程实施后，评价区生产力明显增加，对雏护生态完整性有利。但大面积种植原料林，降低了生态系统的阻抗稳定性，对生态完整性不利。为此，在整地造林时，必须保护原料林周围的次生林；如果一块原料林面积超过50亩，建议横纵各建一条宽30米的乔灌混生的隔离带，增加植被的异质性，从而增强其阻抗稳定性。

The Theory and Practice of the Ecological Integrality Assessment

Expounding the concept, connotation and evaluation methods of the ecological integrity. Ecological integrity is the strucmre integrity and function integrity of the ecosystem. Ecological integrity assessment can be done from the productivity and stability of the regional ecosystem. With raw material forest base construction project as an example, we done the ecological integ- rity assessment. The results show that after the project, the productivity will increase significantly in the evaluation region, it is fa- vorable to maintain ecological integrity. But planting raw material woods in large area will reduce the impedance stability of the ecological system, which is adverse to the ecological integrality. Therefore, the secondary forest around the raw material woods must be protected during groundmaking and forestation. If the area of a piece of raw material woods is more than 50 acres, proposed that a 30 - meter - wide forest belt should be planted in the vertical and horizontal direction, the forest belts should consist of trees and bushes. The maim purpose is to increase the heterogeneity of the vegetation and thereby enhancing its impedance stability.