WFD Cycle 2 TraC macroalgae classification

This dataset is a subset of “ WFD Classification Status Cycle 2” and contains classification data for the Macroalgae biological element in transitional and coastal water bodies. Macroalgae communities (seaweeds) can be used to indicate the ecological status of an estuary or coastal water body. A number of tools are used to measure metrics of composition and abundance for different types of macroalgae communities. Up to two tools used for assessing transitional water bodies are Opportunistic Macroalgae and Fucoid Extent. Up to two tools used for assessing coastal water bodies include Opportunistic Macroalgae and Rockshore Macroalgae. Each tool compares actual (observed) metric scores against reference conditions (reflecting a water body in pristine condition). The comparison of the observed to expected scores is known as an Ecological Quality Ratio (EQR). The EQRs score from the tool assessments are use to produce the Macroalgae 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 2016. All rights reserved.

本数据集为“WFD 分类状态循环 2”的子集，包含过渡带和海岸水体中大型藻类生物要素的分类数据。大型藻类群落（海藻）可用于指示河口或海岸水体的生态状况。针对不同类型的大型藻类群落，采用多种工具来衡量其组成和丰度指标。评估过渡带水体时，最多使用两种工具，包括机遇性大型藻类和苔藓分布范围。评估海岸水体时，最多使用两种工具，包括机遇性大型藻类和岩石海岸大型藻类。每种工具均将实际（观察到的）指标评分与参考条件（反映原始状态下的水体）进行比较。观察值与预期值的比较被称为生态质量比（EQR）。工具评估所得的EQR评分被用于生成水框架指令（WFD）目的之下的水体大型藻类分类（高、良好、中等、较差、差）。归属声明：© 环境署版权和/或数据库权利 2016。保留所有权利。