Data for the article titled "Urbanization drives the decoupling, simplification, and homogenization of aquatic and terrestrial food webs"

Data for the article titled "Urbanization drives the decoupling, simplification, and homogenization of aquatic and terrestrial food webs" The information contained in this repository is referenced in the manuscript. ***************************************************** covariates.csv - Covariate values extracted for all ground-level sites. As many sites are private, their location cannot be disclosed publically. While this table cannot be directly recreated as doing so would require the coordinates of the sites, the calculation of the covariate can be followed on the script covariates_calculation.R. foodweb_metrics.csv - food web metrics for the 54 sites. This table can be recreated using the foodweb_metrics_calculation.R script. metaweb.csv - regional metaweb based on species detected in the study. metaweb_processed.csv - processed version of the regional metaweb for later handling. Rows = interaction, columns = interaction source and target. The metaweb_processed.csv table can be recreated using the prepare_metaweb.R script. taxamat.csv - taxa table for all sites. Rows = sites, columns = species. Values indicate number of reads per OTU (after filtering, contamination removal, and rarefaction). taxo.csv - Taxonomy table for all taxa. Rows = taxa, columns = phylogeny. Raw sequences for the data generated in this study are available on the European Nucleotide Archive under accession project numbers PRJEB88517. ***************************************************** Data dictionary: site_no | paired site ID. A green roof site has the same ID as the ground-level site only if they are paired. natural_banks | percentage of natural banks around the pond (%) marcophyte | marcophyte coverage (%) distance_forest | distance to the forest (m) distance_pond | distance to the closest pond (m) terrestrial_connectivity | patch cohesion index, calculated using landscapemetrics aquatic_connectivity | mean distance between ponds in a 500 m buffer, calculated using landscapemetrics green50 | number of green pixels in a 50 m buffer around the pond edge grey500_frac | fraction of grey surface in a 500 m buffer complementarity | landscape diversity metric, calculated using the lsm_l_joinent function in landscapemetrics overwarming | mean deviation of nighttime temperature compare to the regional average (K) no2 | annual mean air NO2 concentration population | population density in a 500 m buffer vegetation_height_sd_50 | standard deviation of the vegetation height in a 50 m buffer (m) vegetation_density_50 | vegetation density in a 50 m buffer本仓库关联的论文标题为《城市化驱动水生与陆地食物网的解耦、简化与均质化》。 本仓库包含的信息已在该手稿中引用。 ***************************************************** covariates.csv：存储所有地面样点提取得到的协变量值。由于多数样点位于私有区域，其具体坐标无法公开披露。尽管无法直接复现此表格（直接复现需获取样点坐标），但可通过covariates_calculation.R脚本复现协变量的计算流程。 foodweb_metrics.csv：包含54个样点的食物网指标。该表格可通过foodweb_metrics_calculation.R脚本复现。 metaweb.csv：基于本研究中检测到的物种构建的区域元食物网。 metaweb_processed.csv：经预处理的区域元食物网，用于后续分析。表格行代表物种间的相互作用，列分别为相互作用的来源与目标物种。该表格可通过prepare_metaweb.R脚本复现。 taxamat.csv：包含所有样点的物种分类表。表格行代表样点，列代表物种，数值表示经过过滤、污染去除与稀疏化（rarefaction）处理后，每个操作分类单元（Operational Taxonomic Unit, OTU）的序列读数数量。 taxo.csv：包含所有类群的分类学表。表格行代表类群，列代表系统发育信息。 本研究生成的原始序列数据已上传至欧洲核苷酸档案馆（European Nucleotide Archive），登录项目号为PRJEB88517。 ***************************************************** 数据字典： site_no：成对样点ID。仅当绿屋顶样点与对应地面样点为配对样点时，二者的ID才会一致。 natural_banks：池塘周边自然岸线占比（%） marcophyte：大型植物（marcophyte）覆盖率（%） distance_forest：至最近森林的距离（m） distance_pond：至最近其他池塘的距离（m） terrestrial_connectivity：基于landscapemetrics包计算的斑块连通性指数 aquatic_connectivity：基于landscapemetrics包计算的500米缓冲区内池塘间平均距离 green50：池塘边缘50米缓冲区内的绿色像素数量 grey500_frac：500米缓冲区内灰色地表占比 complementarity：基于landscapemetrics包中lsm_l_joinent函数计算的景观多样性指标 overwarming：夜间气温较区域平均值的平均偏差（K） no2：年平均大气NO₂浓度 population：500米缓冲区内的人口密度 vegetation_height_sd_50：50米缓冲区内植被高度的标准差（m） vegetation_density_50：50米缓冲区内的植被密度