Research trends in stable isotope analysis: a revision on unconsolidated intertidal ecosystems

Abstract

This study investigates the role of stable isotope analysis in unconsolidated sediment coastal systems, focusing on scientific production and research trends over time. Existing literature was analyzed to identify knowledge gaps and highlight the importance of stable isotope techniques in understanding coastal ecosystems. A comprehensive bibliometric analysis was conducted using the Scopus database to collect and categorize relevant publications on stable isotope ecology. Key indicators—including publication trends, authorship patterns, and the geographic distribution of research—are shown. The temporal scope of studies was systematically assessed, with particular attention to methodological approaches employed. Co-authorships networks and co-occurring keywords were examined to explore the intellectual structure of the field and identify collaborative patterns among authors. Over 140 publications were identified, authored by over 400 researchers, with interest increasing significantly over time, particularly in trophic studies involving macrobenthos. Mudflats emerged as a focal point, receiving more attention than sandy beaches. The analysis indicates that seasonality is the predominant temporal scale, while mesoscale studies dominate spatial investigations. A plateau in publication growth appears to coincide with the emergence of alternative methodologies for trophic ecology studies. Major contributions come from France, the United States, and Australia. Co-authorship analysis revealed fragmented collaboration networks, with limited international engagement among developing nations. Overall, the importance of stable isotopes in understanding coastal ecosystems is underscored, while the need for methodological diversity and increased collaboration in future research is highlighted.