The plant species richness index is not positive relevant to species evenness index for which represents the evenness extent of species distribution instead of the quantity of species.
物种丰富度指数与均匀度指数并非存在正相关关系，均匀度指数反映的是物种分布的均匀程度，并不反映其物种数量的多少。
Monitoring the quality and quantity of available river water basic informations, provide analysis results for water resources development, distribution and protection services.
监测掌握河道来水的质和量两种基础资料，提供分析结果，为水资源开发、利用、配置和保护服务；
The investigation of the types, quantity, quality and distribution of reserve cultivated land resource is the basic precondition for land development, reclamation, and Consolidation.
查清耕地后备资源的类型、数量、质量和分布是实施土地开发、复垦、整理的基本前提。
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