WFD Cycle 2 Lake Phytobenthos Classification

This dataset is a subset of "WFD Classification Status Cycle 2" and contains classification data for phytobenthos in lakes. Phytobenthos or diatoms can be used to indicate the ecological status of a lake. A biological index called the Trophic Diatom Index (TDI) is calculated using information about the environmental preferences of the individual diatom taxa present in the sample. The actual (observed) TDI scores are compared with a predicted TDI score (reflecting a lake in pristine condition). The comparison of the observed to expected scores is known as an Ecological Quality Ratio (EQR). EQRs are used to produce a phytobenthos classification (High, Good, Moderate, Poor, Bad) of the water body for Water Framework Directive (WFD) purposes. 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，包含了湖泊中植物底栖生物的分类数据。植物底栖生物，或称硅藻，可用来指示湖泊的生态状况。通过分析样本中存在的单个硅藻类群的生态偏好信息，计算得到生物指数——营养硅藻指数（Trophic Diatom Index，简称TDI）。实际的（观测到的）TDI评分与预测的TDI评分（反映湖泊原始状态）进行对比。观测值与预期值之间的比较称为生态质量比（Ecological Quality Ratio，简称EQR）。EQRs被用于生成植物底栖生物分类（优良、良好、中等、较差、恶劣），以符合水框架指令（Water Framework Directive，简称WFD）的目的。归属声明：© 环境署版权及/或数据库权利2015。版权所有。