Supplementary Information

Supplementary Information for: Early Succession on Slag Compared to Urban Soil: A Slower RecoveryS1 File. Supplemental information: methods and results. Detailed history of management for both Reference sites and methods for data analysis, including the list of R packages used. All supplemental results (Table A-J and Fig A-D) are also included. A glossary for site, plot and treatment numbering is included. S2 File. Species list from NIRMI plant survey at BM and VV Slag. “1” denotes presence. C-value stands for Coefficient of Conservatism, based on Universal FQA Calculator. S3 File. Species presence/absence for each plot. Data were compiled from three days of observation: day 77, 91 and 112. Positive identification of a species at any of these days counts as presence, marked by “1”. Two unidentified Dicanthelium species are marked with *. Species only appeared in topsoil plots are marked with ‡; species germinated from the commercial topsoil in the greenhouse are marked with †. S4 File. Functional traits of plant species observed in the survey used for data analysis. Species abbreviations follow those used in S3 File. If one species has multiple measurements of one single trait, measurements were either averaged (numerical) or entered together (categorical). Numerical data with multiple measurements were averaged. Missing data were left blank and substituted with NA in actual analyses. For all analyses, “Type”, “Growth Form” and “Native?” were taken out; in addition, “Seedbank Longevity” and “Lateral Spread” were taken out when performing RLQ analysis and fourth-corner method because of low availability of data. Data were unavailable for the two unidentified Dicanthelium species and Cyperus bipartitus. S5 File. Cover data. Cover in all removal and control plots is measured from weekly monitoring photos. Time is in days from start of the experiment. S6 File. Species number over time. Species number over the full experimental period in each removal and control plots is obtained from weekly monitoring photos. Time is in days from start of the experiment. S7 File. Biomass of germination plots. Biomass of removal and control plots at the end of experimental period. S8 File. Initial biomass of focal species plots. Biomass of focal species plots at the beginning of experimental period (week 2 after planting). S9 File. Final biomass of focal species plots. Biomass of focal species plots at the end of experimental period. S10 File. Reference sites species list. Species lists were compiled from Chicago Park District seeding plans for BM-R and plant survey on VV-R. Note that these lists were not obtained by the same method used for Slag sites.

《矿渣生境与城市土壤的早期演替：恢复过程更为缓慢》附属补充信息：
S1文件：附属研究材料包含方法与结果两部分。收录参考站点的完整管理历史记录、数据分析方法（含所用R软件包列表）；同时提供全部附属结果（表A-J与图A-D），并附有关站点、样地与处理编号的术语表。
S2文件：BM与VV矿渣样地的NIRMI植物调查物种名录。以"1"标记物种存在情况。C值（C-value）指基于通用FQA计算器（Universal FQA Calculator）得到的保守系数（Coefficient of Conservatism）。
S3文件：各监测样地的物种存在/缺失数据。数据来源于3次观测：第77、91和112天。只要在上述任意一天中成功鉴定到某物种，即记为存在并标记为"1"。2个未鉴定的Dicanthelium属物种以"*"标记；仅出现于表层土样地的物种以"‡"标记；从温室商用表层土中萌发的物种以"†"标记。
S4文件：本研究数据分析所用的调查观测植物物种功能性状数据。物种缩写规则与S3文件保持一致。若某物种的单个性状存在多组测量值，数值型性状将取平均值，分类型性状则合并录入。多组数值型测量值均已取平均。缺失数据以空白表示，实际分析中将其替换为NA。所有分析中均剔除"类型（Type）""生长型（Growth Form）"与"是否本土种（Native?）"字段；此外，由于数据可获得性较低，在进行RLQ分析和第四角法（fourth-corner method）分析时，进一步剔除了"种子库寿命（Seedbank Longevity）"与"横向扩散能力（Lateral Spread）"字段。2个未鉴定的Dicanthelium属物种与Cyperus bipartitus无相关数据。
S5文件：盖度数据。所有移除处理组与对照组样地的盖度均通过每周监测照片测算。时间以实验开始后的天数计。
S6文件：物种数随时间变化数据。所有移除处理组与对照组样地在整个实验周期内的物种数均通过每周监测照片获取。时间以实验开始后的天数计。
S7文件：萌发样地生物量数据。实验结束时移除处理组与对照组样地的生物量数据。
S8文件：目标物种样地初始生物量数据。实验开始时（种植后第2周）目标物种样地的生物量数据。
S9文件：目标物种样地最终生物量数据。实验结束时目标物种样地的生物量数据。
S10文件：参考站点物种名录。BM-R与VV-R参考站点的物种名录分别整理自芝加哥公园区（Chicago Park District）的播种计划与植物调查结果。需注意，上述名录的获取方法与矿渣生境站点的调查方法并不相同。