Data from marine radar counts of marbled murrelets (Brachyramphus marmoratus) in British Columbia, Canada

The marbled murrelet is a small seabird found in the North Pacific. Marbled murrelets spend most of their time at sea, foraging for small prey underwater, but also have been observed in freshwater lakes near nesting sites. They breed in old-growth forests along the coast, and during the breeding season move between the ocean to forest during dawn and dusk. The marbled murrelet is listed as threatened under the Canadian Species at Risk Act primarily due to loss of old growth nesting habitat. Beginning in 1996 and ongoing, this monitoring project aims to monitor trends of marbled murrelets across British Columbia and within six designated conservation regions along the BC coast. Birds are detected and counted during dawn transits between ocean and forest using radar stations at specific sites (see Resources and Data collection & use pages for more detail).This repository contains the following five files:mamu-count-data (csv, txt): count data from marbled murrelet surveys from 1996-2018, where each line represents a survey.mamu-count-metdata (csv, txt): metadata explaining all variables in the dataset.README (txt): important contextual information describing study design, spatial and temporal characteristics, data use license, authors, and acknowledgements.Supplementary information can be accessed at the Marbled Murrelets OSF page: https://doi.org/10.17605/OSF.IO/ZSG63斑海雀（Marbled Murrelet）是分布于北太平洋的小型海鸟。该物种多数时间栖息于海洋，于水下捕食小型猎物，但也有观测记录显示其会出现在繁殖巢址附近的淡水湖泊中。 斑海雀在沿海老龄林中繁殖，繁殖季会于黎明与黄昏时段往返于海洋与森林之间。依据加拿大《濒危物种法（Species at Risk Act）》，斑海雀被列为受威胁物种，其主要致危因素为老龄繁殖栖息地的丧失。 本监测项目于1996年启动并持续开展，旨在监测不列颠哥伦比亚省全省及该省沿海六个指定保育区域内的斑海雀种群动态趋势。监测工作通过在特定站点布设雷达站，于海洋与森林的黎明往返时段内探测并计数斑海雀（详细信息参见资源与数据收集及使用页面）。 本数据集仓库包含以下5个文件： 1. mamu-count-data（csv、txt）：1996-2018年斑海雀调查计数数据，每行对应一次调查任务。 2. mamu-count-metdata（csv、txt）：用于说明数据集中所有变量的元数据。 3. README（txt）：包含研究设计、时空特征、数据使用许可、作者及致谢等重要背景信息。 补充信息可通过斑海雀OSF项目页面获取：https://doi.org/10.17605/OSF.IO/ZSG63