Meta-analysis dataset of fish recruitment enhancement in coastal nursery habitats across North America

This dataset compiles 2,002 independent effect sizes from 102 published studies quantifying fish density in structured coastal habitats (submerged aquatic vegetation, salt marsh, and oyster reef) relative to adjacent unstructured bottom across North America and the Caribbean. Each row represents one spatially and temporally independent comparison. For each comparison, the dataset includes mean fish density or catch per unit effort (CPUE), standard deviation, replicate sample size, sampling gear, taxonomic identity (species and family), functional guild classification, habitat type, restoration status, abiotic variables (temperature, salinity, tidal regime), and habitat attributes (e.g., percent cover, structure biomass, reef relief, and adjacent habitat type). Recruitment enhancement (RE) is calculated as the log response ratio of mean fish density in structured habitat relative to adjacent unstructured habitat. Fish abundance values are retained in original study units (e.g., individuals per m², per haul, per tow) as documented in the unit column. Missing values are coded as NA. The dataset enables comparative analyses of recruitment enhancement among major North American nursery habitats and evaluation of how restoration, habitat attributes, abiotic conditions, and fish traits shape recruitment responses. All data were extracted from published sources and involve no new ethical considerations. The dataset is publicly available for reuse.