Data from 10-day sediment toxicity tests of bed sediments from the Niagara River Area of Concern and tributaries, New York, with Chironomus dilutus and Hyalella azteca, 2014-15

Data from 10-day sediment toxicity tests of bed sediments from the Niagara River area of concern and tributaries, Niagara and Erie County, New York. Specifically, the data was used to compare the survival and growth of two macroinvertebrate species in sediments from study sites and laboratory controls. Results are from 10-day sediment exposures of two test species, Chironomus dilutus and Hyalella azteca. Bed sediments were collected from depositional areas using either a petite Ponar (0.03 square meter) dredge or a stainless steel sediment scoop. At each site, approximately five grabs or scoops were composited into a bucket, mixed, and a 4-liter (L) subsample was stored in a polyethylene container. Sediment toxicity testing were then conducted by a contract laboratory to quantify toxicity with the dipteran, Chironomus dilutus, and the amphipod, Hyalella azteca, during 10-day survival and growth bioassays following USEPA test methods 100.2 and 100.1, respectively. U.S. Environmental Protection Agency, 2000, Methods for measuring the toxicity and bioaccumulation of sediment associated contaminants with freshwater invertebrates. Second edition: U.S. Environmental Protection Agency, Office of Research and Development EPA 600/R-99/064.http://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=30003SBA.TXT. The data include the year, site ID, and six columns of results from 10-day sediment exposures of two test species, Chironomus dilutus and Hyalella azteca. The following endpoints were measured for each species following the 10-day exposure: percentage of organisms surviving (hereafter survival), average ash-free dry weight of the surviving organisms (hereafter growth), and average ash-free dry weight of the surviving organisms divided by the initial number of organisms (hereafter biomass). Companion to this report: George, S.D., Baldigo, B.P., and Duffy, B.T., 2016, Toxicity of bed sediments from the Niagara River Area of Concern and tributaries, New York, to Chironomus dilutus and Hyalella azteca, 2014–15: U.S. Geological Survey Data Series 1016, XX p., http://dx.doi.org/10.3133/ds1016.本数据集源自美国纽约州尼亚加拉县与伊利县尼亚加拉河关注区域及其支流河床沉积物的10天沉积物毒性测试实验数据。具体而言，本数据集用于对比研究点位沉积物与实验室对照组沉积物中两种大型底栖无脊椎动物的存活率与生长情况。实验结果源自两种受试物种——摇蚊（Chironomus dilutus）与钩虾（Hyalella azteca）的10天沉积物暴露实验。沉积物样品采自沉积区域，采样工具可选小型Ponar采泥器（0.03平方米）或不锈钢沉积物采样勺。每个研究点位采集约5份样品，混合后装入容器，随后取4升（L）子样品储存于聚乙烯容器中。随后由签约实验室按照美国环境保护署（U.S. Environmental Protection Agency，USEPA）的测试方法标准100.2和100.1，分别针对双翅目摇蚊（Chironomus dilutus）和端足目钩虾（Hyalella azteca）开展10天存活率与生长生物测定实验，以量化沉积物毒性。实验依据的标准方法源自：美国环境保护署，2000年，《淡水无脊椎动物沉积物相关污染物毒性与生物富集量测定方法》（第二版）：美国环境保护署研究与开发办公室，EPA 600/R-99/064。相关文档链接：http://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=30003SBA.TXT。本数据集包含实验年份、点位编号，以及两种受试物种（摇蚊（Chironomus dilutus）与钩虾（Hyalella azteca））的10天沉积物暴露实验共6列结果数据。针对两种受试物种，在10天暴露实验后测定以下终点指标：生物存活率（以下简称存活率）、存活个体的平均无灰干重（以下简称生长量），以及存活个体平均无灰干重与初始接种个体数的比值（以下简称生物量）。本数据集配套报告信息：George, S.D.、Baldigo, B.P.与Duffy, B.T.，2016年，《2014–2015年美国纽约州尼亚加拉河关注区域及支流河床沉积物对摇蚊（Chironomus dilutus）与钩虾（Hyalella azteca）的毒性》：美国地质调查局数据系列1016，共XX页，链接：http://dx.doi.org/10.3133/ds1016。