How language and indexing affect meta-analyses: the vertical stratification of orchid bees (Apidae: Euglossini

Resumo

Vertical stratification in orchid bees is a small field, particularly suitable for an in-depth bibliometric analysis. We examined 13 publications to test the hypothesis that inclusion in databases is more important than language in the visibility and impact of publications about orchid bee stratification. Our findings matched the hypotheses: databases, rather than language, define impact. Our expert criteria suggest that a larger sample would produce the same results. Nevertheless, an ethically sound literature review should cover all relevant literature outside commercial databases: valuable contributions are also published in minor, non-indexed journals and repositories.