Pub Date : 2023-12-06DOI: 10.4236/jep.2023.1412052
Roger Yeardley, Brian Duffy, Kimani Kimbrough, Jim Lazorchak, Marc A Mills, Ed Johnson
Hester-Dendy (HD) multi-plate samplers have been widely used by state and federal government agencies for bioassessment of water quality through use of macroinvertebrate community data. To help guide remediation and restoration efforts at the Niagara River Great Lakes Area of Concern site, a multi-agency study was conducted in 2014 to assess the contribution of seven major urban tributaries on the US side of the river toward the impairment of the Niagara River. As part of this study, macroinvertebrate communities were sampled using two co-located versions of HD samplers: one version used by the New York State Department of Environmental Conservation (NYSDEC) and another by the US Environmental Protection Agency Office of Research and Development. Samplers were deployed in tributaries in highly developed watersheds with high percent impervious surface. The two sampling methods varied in terms of number and size of plates, between-plate spacing, and deployment method. Comparison of the similarity/grouping of communities with multivariate ordination techniques, Nonmetric Multidimensional Scaling and Multi-Response Permutation Procedure, showed that both methods were able to detect differences in communities at stations, despite some grouping by month and method. The indices and metrics derived from the two HD methods were found to give comparable but not identical assessments of water quality. Despite their differences, the methods were robust with respect to water quality categories derived from indices used nationally (HBI) and by NY state (BAP). For the common richness metrics, total taxa and EPT richness, there was no statistical difference between means from 3 samplings. Some metrics, especially percent tolerant collector-gatherer individuals, did show significant differences at certain stations. Indicator Species Analysis showed some taxa associated with each method. The observed community differences were thought mostly due to the difference in sampler deployment position.
海斯特-丹迪（HD）多板采样器已被州和联邦政府机构广泛用于通过使用大型无脊椎动物群落数据对水质进行生物评估。为了帮助指导尼亚加拉河五大湖关注区的整治和恢复工作，2014 年开展了一项多机构研究，以评估美国一侧的七条主要城市支流对尼亚加拉河水质的影响。作为该研究的一部分，使用两种共用的 HD 采样器对大型无脊椎动物群落进行了采样：一种采样器由纽约州环境保护部 (NYSDEC) 使用，另一种由美国环境保护局研发办公室使用。采样器部署在高度发达流域的支流中，这些流域的不透水表面比例很高。这两种取样方法在板的数量和尺寸、板间距以及部署方法方面各不相同。利用多变量排序技术（非度量多维标度和多反应迭代程序）对群落的相似性/分组进行了比较，结果表明，尽管按月份和方法进行了一些分组，但两种方法都能检测到各站群落的差异。从这两种 HD 方法中得出的指数和度量指标对水质的评估具有可比性，但并不完全相同。尽管存在差异，但这两种方法在根据全国（HBI）和纽约州（BAP）使用的指数得出的水质类别方面是可靠的。对于常见的丰富度指标，即总分类群和 EPT 丰富度，3 次采样的平均值之间没有统计学差异。某些指标，尤其是耐受性强的采集-收集个体的百分比，在某些站点确实存在显著差异。指示物种分析显示，有些分类群与每种取样方法有关。观察到的群落差异被认为主要是由于采样器部署位置的不同造成的。
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