WFD Cycle 2 lake littoral invertebrates classification

This dataset is a subset of "WFD Classification Status Cycle 2" and contains classification data for Macro-invertebrates in lakes. Lake acidification macro invertebrate metric (LAMM) is a species/ abundance weighted method that assesses the degree to which anthropogenic acidification has impacted macro-invertebrate communities. Results are compared to reference conditions (ie. Non-impacted) and the index quantifies the deviation from pristine status via an Ecological Quality Ratio (EQR). Two sets of reference conditions are used for Humic & Clear waters.
Classification bands are applied from High (little or no impact) to moderate or worse (significantly impacted). Confidence of class (CoC) is also calculated. This gives the likelihood of the site belonging to any particular class for WFD reporting. 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，包含湖泊中大型无脊椎动物的分类数据。湖泊酸化大型无脊椎动物指标（LAMM）是一种物种/丰度加权的评估方法，用以衡量人为酸化对大型无脊椎动物群落影响的程度。结果与参照条件（即未受影响）进行比较，并通过生态质量比（EQR）量化与原始状态的偏差。对于富腐殖质和清澈水体，采用两组参照条件。分类带从高（几乎无影响）到中等或更差（显著影响）应用。同时，也计算了分类的置信度（CoC），这为WFD报告提供了该地点属于特定类别的可能性。归属声明：© 环境署版权和/或数据库权利2015。版权所有。