Saskatchewan Condition Assessment of Lotic Ecosystems (SCALE): A multivariate tool for assessing the integrity of Northern Great Plains wadeable rivers and streams

IF 2.9 3区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Facets Pub Date : 2023-01-01 DOI:10.1139/facets-2022-0158
Iain D. Phillips, G. McMaster, D. Chivers, M. Bowman
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Abstract

Human access to surface water resources in the Northern Great Plains (NGP) is challenged by availability and quality, and ecosystem health objectives for these characteristics have not been well developed. Here, we present a predictive multivariate model using the reference condition approach to inform goals for ecosystem health assessment. Benthic communities and abiotic variables were collected at 280 potential reference sites and 8 test sites, and of these, reference sites with least amount of human activity (n = 83) were classified into three community groups and summary metrics. Discriminant function analysis and cross-validation determined that stream order and ecoregion predicted 68.7% of the sites correctly, thus enabling comparison of sites with unknown condition to reference site groups. We then evaluated metrics through Test Site Analysis and stressor gradient analysis in each biological group. Beetle and amphipod fauna were found to be important for condition assessment in addition to traditional metrics of species richness, abundance, detritivory, Ephemeroptera/Plecoptera/Trichoptera dominance, and assemblage composition. These results provide least disturbed reference condition and ecological insights into land use impacts in the NGP. Ultimately, this model is an effective tool for evaluating biotic condition, enables prioritizing river management strategies, and can quantify the efficacy of mitigation measures.
萨斯喀彻温省河流生态系统状况评估(SCALE):一种评估北部大平原可涉水河流和溪流完整性的多元工具
人类获取北方大平原地表水资源的途径受到可用性和质量的挑战,而针对这些特征的生态系统健康目标尚未得到很好的制定。在这里,我们提出了一个使用参考条件方法的预测多变量模型,为生态系统健康评估的目标提供信息。在280个潜在参考地点和8个测试地点收集了底栖生物群落和非生物变量,其中人类活动量最小的参考地点(n = 83)被分为三个社区组和汇总指标。判别函数分析和交叉验证确定,流序和生态区正确预测了68.7%的位点,从而能够将条件未知的位点与参考位点组进行比较。然后,我们通过测试点分析和压力源梯度分析对每个生物组的指标进行了评估。除了物种丰富度、丰度、碎屑象牙、蜉蝣目/丛翅目/毛翅目优势和群落组成等传统指标外,甲虫和片脚类动物群对条件评估也很重要。这些结果为NGP中的土地利用影响提供了最少干扰的参考条件和生态学见解。最终,该模型是评估生物状况的有效工具,能够优先考虑河流管理策略,并可以量化缓解措施的效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Facets
Facets MULTIDISCIPLINARY SCIENCES-
CiteScore
5.40
自引率
6.50%
发文量
48
审稿时长
28 weeks
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