WFD Cycle 2 lake chironomids classification

This dataset is a subset of "WFD Classification Status Cycle 2" and contains classification data for Chironomids in lakes. Chironomid populations within any given waterbody closely reflect both the nutrient and pH conditions within the water body. Scoring systems that allow the impact of both pressures to be assessed have been developed. However, currently only the CPET nutrient scoring system has been through intercalibration and is used for water body classification under the Water Framework Directive (WFD).
CPET is an important tool for monitoring large water bodies. Its passive sampling methodology, compared with the direct sampling methods used in all other ecological techniques makes it particularly good for representing ecological function and providing classification at a waterbody scale.
The tool uses a series of predictor variables to produce a reference chrionomid community for the waterbody, which it then compares with the observed chrionomid community to produce an EQR value. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.

本数据集为“WFD 分类状态周期 2”的子集，包含湖泊中摇蚊的分类数据。任何水体中的摇蚊种群均能紧密反映水体内部的营养盐和pH条件。已开发出评分系统以评估这两种压力的影响。然而，目前只有CPET营养评分系统经过了跨校准，并用于根据《水框架指令》（WFD）对水体进行分类。CPET是监测大型水体的重要工具。与所有其他生态技术中使用的直接采样方法相比，其被动采样方法尤为适用于表征生态功能并提供水体尺度的分类。该工具利用一系列预测变量来生成水体的参考摇蚊群落，并将其与观察到的摇蚊群落进行比较，以产生一个EQR值。归属声明：© 环境署版权和/或数据库权利2015。保留所有权利。