Breeding shorebird observation data including degree of oiling for shorebirds in Louisiana, Mississippi, Alabama, and Texas, 2010-2011

This report contains breeding shorebird observation data, and provides additional context for the posted dataset, including information about the collection, analysis, and organization of the data. Characteristics of this dataset include the following: • The breeding shorebird data focus primarily on Wilson’s plovers, snowy plovers, and American oystercatchers, as well as other breeding shorebirds in the project area. • This dataset includes data initially collected independently by Trustees. • Before posting, extensive work was done independently by BP contractors to verify some aspects of the posted data (e.g., positional coordinates and field data). Data were collected by shore-based observers working in Louisiana, Mississippi, Alabama, and Texas in the summer of 2010 and again in the summer of 2011. The data were collected independently by the Trustees under the work plan titled Gulf Coast Breeding, Beach-Nesting Bird Populations in Areas Impacted by the BP Deepwater Horizon / Mississippi Canyon 252 Oil Spill: Bird Study No. 8, including the associated 2011 addendum. This dataset includes data associated with breeding shorebird site conditions, live bird counts, and assessments to categorize the degree of visible oil on live birds. Each observed bird was categorized as not visibly oiled or as having trace (≤5 percent), light (6 to 20 percent), moderate (21 to 40 percent), or heavy (>40 percent) oiling. Photographs of birds were taken where possible. The methods used to collect live bird visible oiling data were similar to those that guided the collection of data associated with the Live Bird Oiling Data Publication Summary Report (Reference No. B-01v01-02). Sampling variations may exist across observers, methods, locations, and times.

本报告包含繁殖滨鸟观测数据，并为已发布数据集提供额外背景信息，涵盖数据的采集、分析与整理流程。本数据集的特征如下：
- 本次繁殖滨鸟观测数据主要聚焦于威尔逊鸻（Wilson’s plover）、雪鸻（snowy plover）与美洲蛎鹬（American oystercatcher），同时涵盖项目区域内的其他繁殖滨鸟物种。
- 本数据集包含由托管方（Trustees）最初独立采集的原始数据。
- 在正式发布前，BP的承包商团队已独立开展大量工作，对已发布数据的部分内容进行核验，例如位置坐标与野外采集数据。

数据采集工作由陆基观测人员于2010年夏季与2011年夏季，在路易斯安那州、密西西比州、阿拉巴马州与得克萨斯州开展。上述数据由托管方（Trustees）依据名为《受BP深水地平线/密西西比峡谷252号漏油事件影响区域的墨西哥湾沿岸繁殖、海滩筑巢鸟类种群：鸟类研究项目第8号》及其2011年增补方案的工作计划独立采集。

本数据集涵盖与繁殖滨鸟栖息地状况、活鸟计数以及活鸟可见油污程度分级评估相关的数据。每只观测到的鸟类均被划分为未受可见油污污染，或受微量（≤5%）、轻度（6%~20%）、中度（21%~40%）以及重度（>40%）油污污染四个等级。在条件允许的情况下，会拍摄观测鸟类的相关照片。

用于采集活鸟可见油污数据的方法，与《活鸟油污数据发布汇总报告》（参考文献编号B-01v01-02）所采用的数据采集方法一致。不同观测人员、采集方法、观测地点与时间之间可能存在采样差异。