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The impact of channelization on macroinvertebrate bioindicators in small order Illinois streams: insights from long-term citizen science research
Aquatic Sciences ( IF 2.4 ) Pub Date : 2020-03-04 , DOI: 10.1007/s00027-020-0706-4
Charlie Blake , Allison K. Rhanor

Channelization can have far-reaching and long-term impacts on stream ecology. In this study, we demonstrate that channelization is associated with lower stream quality as measured by macroinvertebrate bioindicators when compared to unchannelized streams. Citizen scientists collected the data for this study between 1995 and 2014, performing 3021 sampling events during the months of May and June across 567 Illinois streams. We found significantly lower taxa richness, EPT taxa richness, and macroinvertebrate biotic index values in channelized sites. Our findings also show prevalent siltation in channelized sites that is likely negatively affecting macroinvertebrates, along with a possible lower availability of quality habitat. We also measured stream velocity and found that average velocity did not differ between our channelized and unchannelized sites. Our findings suggest stream velocity was not a driving factor in determining the differences in macroinvertebrate assemblages, although we cannot comment on the possible change in velocity from pre to post channelization at each site. This study allows for a large dataset that covers diverse streams across the entire state of Illinois. Our work provides example and encouragement for other researchers to take advantage of the power of citizen science, and the existing large datasets available from these projects.

中文翻译:

通道化对伊利诺伊州小溪流中大型无脊椎动物生物指标的影响:来自长期公民科学研究的见解

渠道化可以对河流生态产生深远和长期的影响。在这项研究中,我们证明了与未通道化的流相比,通过大型无脊椎动物生物指标测量的通道化与较低的流质量相关。公民科学家在 1995 年至 2014 年期间为这项研究收集了数据,在 5 月和 6 月期间对伊利诺伊州 567 条河流进行了 3021 次采样事件。我们发现通道化站点中的类群丰富度、EPT 类群丰富度和大型无脊椎动物生物指数值显着降低。我们的研究结果还表明,在渠道化场地中普遍存在淤积,这可能会对大型无脊椎动物产生负面影响,同时可能降低优质栖息地的可用性。我们还测量了水流速度,发现我们的渠道化站点和非渠道化站点之间的平均速度没有差异。我们的研究结果表明,溪流速度不是决定大型无脊椎动物组合差异的驱动因素,尽管我们无法评论每个地点从通道化前到通道化后的速度可能变化。这项研究允许使用涵盖整个伊利诺伊州不同河流的大型数据集。我们的工作为其他研究人员利用公民科学的力量以及这些项目提供的现有大型数据集提供了榜样和鼓励。尽管我们无法评论每个站点从信道化前到后信道化的可能速度变化。这项研究允许使用涵盖整个伊利诺伊州不同河流的大型数据集。我们的工作为其他研究人员利用公民科学的力量以及这些项目提供的现有大型数据集提供了榜样和鼓励。尽管我们无法评论每个站点从信道化前到后信道化的可能速度变化。这项研究允许使用涵盖整个伊利诺伊州不同河流的大型数据集。我们的工作为其他研究人员利用公民科学的力量以及这些项目提供的现有大型数据集提供了榜样和鼓励。
更新日期:2020-03-04
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