Terra Mar Applied Sciences, LLC, 1370 Tewkesbury Place NW, Washington, DC, 20012, USA.
U.S. Fish and Wildlife Service, 341 Greeno Rd., Suite A, Fairhope, AL, 36532, USA.
Environ Monit Assess. 2020 Mar 17;191(Suppl 4):818. doi: 10.1007/s10661-019-7921-2.
Using ship-based surveys, the Natural Resource Damage Assessment (NRDA) Trustees assessed the external oiling of offshore and pelagic marine birds inhabiting the northern Gulf of Mexico (Gulf) in the year following the Deepwater Horizon oil spill (DWH spill). Study objectives were to (1) collect data on pelagic seabirds that were visibly oiled, (2) collect data to estimate abundance of seabirds in offshore and pelagic waters, and 3) document the location and condition of any bird carcasses encountered. Methods employed included strip line transects and station point counts. Surveys were conducted within a study area bound by the Texas-Mexico border and the Dry Tortugas of Florida to the south, and the nearshore coastal waters of the northern Gulf of Mexico. A total of 5665 strip line transects and 386 station point-counts of variable duration were collected during the study. More than 23,000 individual seabirds comprising 45 estuarine, coastal, offshore, and pelagic species were tallied. Average daily abundance of seabirds detected varied from a low of approximately 7 birds/day in November 2010 along regions of the mid- and outer continental shelf to a high of more than 580 birds/day in June 2011 within the near-shore, coastal waters of the northern Gulf.
利用船舶调查，自然资源损害评估（NRDA）受托人评估了深水地平线溢油事件（DWH 溢油）后一年，居住在墨西哥湾北部（Gulf）的近海和远洋海鸟的外部油污情况。研究目的是：（1）收集可见油污的远洋海鸟数据；（2）收集估计近海和远洋水域海鸟数量的数据；以及 3）记录遇到的任何鸟类尸体的位置和状况。采用的方法包括条带线横断和站点点计数。调查在德克萨斯州-墨西哥边境和佛罗里达州干龟群岛以南，以及墨西哥湾北部近岸沿海水域范围内的研究区域内进行。在研究期间共收集了 5665 条条带线横断和 386 个不同持续时间的站点点计数。总计记录了超过 23000 只个体海鸟，包括 45 种河口、沿海、近海和远洋物种。海鸟的平均日检出量从 2010 年 11 月中大陆架中部和外部地区的约 7 只/天到 2011 年 6 月墨西哥湾北部近岸沿海水域的超过 580 只/天不等。
