Data and R code for a meta-analysis of structured habitat effects on fish communities

This archive contains the analysis-ready dataset, R scripts, archived model outputs, figures, and screening materials used for a meta-analysis evaluating how natural and artificial structured habitats affect fish-community metrics. The released analysis dataset contains 1,041 effect sizes and sampling variances used in the archived meta-analytic models. The dataset includes study identifiers, publication year, country, marine region, response indicator, group means, standard deviations, sample sizes, habitat classifications, calculated Hedges' g effect sizes, sampling variances, standard errors, and confidence intervals. The R scripts reproduce the main model summaries, moderator analyses, figures, sensitivity analyses, leave-one-study-out diagnostics, funnel-plot appendices, and output verification. The archive also includes full-text screening decisions for systematic-review traceability.