On the efficacy of restoration in stream networks: comments, critiques, and prospective recommendations

R code and associated data for a comment on a paper by Christopher Swan and Bryan Brown titled "Metacommunity theory meets restoration: isolation may mediate how ecological communities respond to stream restoration." <br><br>Swan and Brown (2017) recently addressed the effects of restoration on stream communities under the meta-community framework. Using a combination of headwater and mainstem streams, Swan and Brown (2017) evaluated how position within a stream network affected the outcome of restoration on invertebrate communities. Ostensibly, their hypotheses were partially supported as restoration had stronger effects in headwater streams: invertebrate taxonomic richness was increased and temporal variability decreased in restored reaches; however, these results were not consistent upon closer scrutiny for both the original paper (Swan and Brown 2017) and the later erratum (Swan and Brown 2018). This is due to issues with experimental design, improper use of statistical analyses, and discrepancies between written methods and what was actually conducted. Here, I provide a secondary analysis of the data, with hypotheses and interpretations in the context of stream, metacommunity, and restoration ecology. <br>These are the corrected data provided by Christopher M. Swan and Bryan L. Brown (Swan and Brown 2017), and are deposited here for ease of the reader. <br> If the data are re-used, please cite the proper source: Swan, C. M., and B. L. Brown. 2017. Metacommunity theory meets restoration: isolation may mediate how ecological communities respond to stream restoration. Ecological Applications 27:2209-2219.<br>

本数据集包含用于评论Christopher Swan与Bryan Brown题为《元群落理论与恢复生态学结合：隔离作用可调控溪流恢复对生态群落的影响》的论文的R代码及配套数据。

Swan与Brown（2017）基于元群落（metacommunity）框架，探讨了溪流恢复对溪流群落的影响。他们结合源头溪流与干流溪流两类生境，评估了溪流网络内的空间位置如何调控恢复措施对无脊椎动物群落的作用效果。从表面来看，其假说得到了部分验证：源头溪流中的恢复措施效果更为显著，修复河段的无脊椎动物分类丰富度提升，且时间变异性降低；但经仔细核查，无论是原始论文（Swan与Brown 2017）还是后续勘误（Swan与Brown 2018），其研究结果均存在不一致性。该问题源于实验设计缺陷、统计分析方法使用不当，以及书面描述的实验方法与实际操作之间存在偏差。本研究对原数据开展了二次分析，所有假说与解读均基于溪流生态学、元群落生态学与恢复生态学的研究框架。

本数据集使用的是Christopher M. Swan与Bryan L. Brown（Swan与Brown 2017）提供的校正后数据，上传至此处以方便读者查阅。

若重复使用本数据，请引用原始文献：Swan, C. M., and B. L. Brown. 2017. 元群落理论与恢复生态学结合：隔离作用可调控溪流恢复对生态群落的影响. Ecological Applications 27:2209-2219.