生物入侵的评价与预警研究

分析了生物入侵的机制,认为生物入侵受外来种生物学特性、生态系统的可侵入性和环境条件等多方面的影响.在此基础上提出生物入侵的评价指标体系和因素分析评价方法.在评价的基础上,提出了利用多微区分分析方法进行生物入侵预警分析,为科学评价和有效预防生物入侵提供了一定的理论基础.

On evaluation and predication of biological invasion

The present paper is aimed at giving a general analysis of the mechanisms of biological invasion, which is likely to be affected by the biological features of the alien species or other ecosystem invisible and environment-unfriendly ecological matters. The paper has also proposed a general indicating system and factor-analyzing assessment methods based on the analysis of the current serious bio-invading situations. Generally speaking, the indicating system of the bio-invasion actually consists of three sections: the indicating system of the biological features of the alien species, the indicating system of the ecosystem invisible environment-unfriendly ecological matters or conditions. The so-called factor-analyzing assessment has mainly inherited the ideas of the analytic hierarchically processing methods. That is to say, first of all, it is necessary to give the weight of each hierarchy, and, then, that of the internal hierarchy, and, last of all,` the total weight, which can be assessed by operating the inter-and intra-hierarchical weights. However, when the biological invasion function is evaluated, all the non-dimensional quantities of the practical value of every parameter are to be processed with all the dimensionless data of every parameter and weight factors collected, so as to obtain the coefficient of the subsystems of all the bio-invasion processes, and then to get the evaluation coefficient vector (T) to show the state information on the biological invasion situations. Last of all, a multiple discriminative analytic approach has been adopted to introduce how to assess and predict the biological invasion consequences and liabilities in favor of effective prevention.