Wader Zonal Map

The Wader Zonal Map – a.k.a. Wader Sensitivity Map (WSM) and Breeding Wader Sensitivity Map – was produced by the British Trust for Ornithology (BTO) in partnership with the Forestry Commission and the Cairngorm National Park Authority. This layer shows the predicted relative abundance of ten species of breeding wader for each 1km square of England, Scotland and Wales. Predicted relative abundances are categorised into five strata identified by numbers under the two-letter code in the attribute table. The two-letter codes are: [cu] – Curlew [l] – Lapwing [rk] – Redshank [sn] – Snipe [oc] – Oystercatcher [gp] – Golden Plover [dn] – Dunlin [cs] – Common Sandpiper [rp] – Ringed Plover [gk] – Greenshank. Predictions were derived using statistical models (random forest regression tree) with bird data taken from the BTO/SOC/BWI Bird Atlas (which covered the period 2008 – 11) and a range of environmental data sets, including climate (temperature and precipitation), topography (elevation and slope), habitat, wind farms and roads and predation risk. While overall the predictive models performed well as assessed by correlation with empirical data, it must be emphasised that these are predictions which will not be accurate in all cases. Full details of the models, sources of data and fuller discussion of the predictive capabilities and limitations of the models are found in the associated report, O’Connell et al. 2021. This report (https://www.bto.org/our-science/publications/research-reports/sensitivity-mapping-breeding-waders-britain-towards) should be referred to when using this data. Additional attribute fields: [ONEKMREF] = the OS monad reference. [Cntry] = the GB country into which the 1km grid square falls – where a grid square is cross-border this is coded as such. Coding: 1 – England, 2- Scotland, 3 – Wales, 4 – England and Scotland, 5 – England and Wales.涉禽分区地图（别名涉禽敏感性地图（Wader Sensitivity Map, WSM），亦称为繁殖涉禽敏感性地图）由英国鸟类学信托基金会（British Trust for Ornithology, BTO）联合林业委员会及凯恩戈姆国家公园管理局共同制作。该图层展示了英格兰、苏格兰及威尔士境内每1km×1km网格单元内10种繁殖涉禽的预测相对丰度。预测相对丰度被划分为五个等级，属性表中以两位字母代码下的数字进行标识。两位字母代码对应物种如下：[cu] – 白腰杓鹬（Curlew）、[l] – 凤头麦鸡（Lapwing）、[rk] – 红脚鹬（Redshank）、[sn] – 扇尾沙锥（Snipe）、[oc] – 蛎鹬（Oystercatcher）、[gp] – 金斑鸻（Golden Plover）、[dn] – 黑腹滨鹬（Dunlin）、[cs] – 矶鹬（Common Sandpiper）、[rp] – 环颈鸻（Ringed Plover）、[gk] – 青脚鹬（Greenshank）。模型预测基于随机森林回归树（random forest regression tree）统计模型，鸟类数据取自覆盖2008至2011年的BTO/SOC/BWI鸟类图集，同时结合了一系列环境数据集，包括气候（气温与降水）、地形（海拔与坡度）、生境、风电场、道路以及捕食风险等数据。尽管通过与实测数据的相关性评估显示，整体预测模型表现良好，但必须强调，此类预测并非在所有场景下均准确无误。关于模型、数据来源的完整细节，以及对模型预测能力与局限性的更全面讨论，可参阅相关报告《O’Connell等人，2021》。使用本数据集时，请务必引用该报告（链接：https://www.bto.org/our-science/publications/research-reports/sensitivity-mapping-breeding-waders-britain-towards）。附加属性字段说明：[ONEKMREF]为英国大地测量单格参考标识；[Cntry]表示该1km网格单元所属的英国国家，若网格单元跨越边境，则按跨边境情况编码。编码规则如下：1 – 英格兰，2 – 苏格兰，3 – 威尔士，4 – 英格兰与苏格兰跨境，5 – 英格兰与威尔士跨境。