Data and code for Vidić et al. 2026: Synthesis of Anthropogenic Impacts on Birds - Systematic Map and Bibliometric Analysis of Meta-Analyses

This repository contains the data of complete screening process, data extraction sheets, and analytical code used for the systematic map of meta-analyses on anthropogenic impacts on birds. The provided materials enable full reproducibility of the literature screening process, data preparation, bibliometric and altmetric analyses, and all figures presented in the manuscript. Our main objectives were to: (i) describe the thematic, taxonomic, ecological, and geographic coverage of existing meta-analyses; (ii) assess adherence to important aspects of reporting and methodological standards; (iii) analyse author networks, collaboration patterns, and journal distributions; and (iv) evaluate the broader influence and societal reach of meta-analyses, including their uptake in policy and decision-making documents. We synthesised information from 149 published meta-analyses examining a wide range of anthropogenic pressures and biological responses in birds. The synthesis shows rapid growth of meta-analytical research but substantial imbalances in coverage. Habitat loss and fragmentation, agriculture and urbanisation dominate the literature, and most meta-analyses focus on diversity, abundance, and reproduction. Research effort is biased toward Passeriformes and geographically concentrated in North America and Europe. Reporting transparency is inconsistent, preregistration and risk-of-bias assessments are rare, and many meta-analyses lack sufficient information for full reproducibility or updating. Bibliometric and altmetric analyses indicate high levels of collaboration but uneven geographic representation of authors and research influence. Addressing these limitations in future is crucial to improve the reliability, comparability, and policy relevance of meta-analyses in this field.本数据集仓库收录了用于开展人为活动对鸟类影响的元分析（meta-analysis）系统图谱（systematic map）的完整文献筛选流程数据、数据提取表单及分析代码。所提供的全套材料可完全复现论文中呈现的文献筛选流程、数据预处理、文献计量与替代计量（altmetric）分析，以及所有配图内容。 本研究的核心目标包括：(i) 梳理现有元分析的主题、分类群、生态及地理覆盖范围；(ii) 评估研究对报告规范与方法学标准重要维度的依从性；(iii) 分析作者合作网络、协作模式及期刊分布特征；(iv) 评估元分析的整体影响力与社会传播范围，包括其在政策与决策文件中的应用情况。 本研究整合了149篇已发表的元分析相关信息，这些元分析聚焦于鸟类面临的各类人为压力与生物学响应。综合分析结果显示，该领域的元分析研究增长迅速，但覆盖范围存在显著失衡：生境丧失与破碎化、农业活动及城市化是现有研究的主流主题，且多数元分析聚焦于鸟类的多样性、丰度与繁殖性能。研究资源存在明显偏向：分类学上集中于雀形目（Passeriformes），地理上则集中于北美与欧洲。研究报告的透明度参差不齐，预注册与偏倚风险评估极为罕见，且多数元分析缺乏支持完整复现或后续更新的足够信息。文献计量与替代计量分析结果表明，该领域合作程度较高，但作者群体的地理代表性与研究影响力分布不均。解决上述局限对于提升该领域元分析的可靠性、可比性与政策相关性至关重要。