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Romanian Journal of Biology - Plant Biology
ROMANIAN ACADEMY |
BIBLIOMETRIC ANALYSIS OF DROSOPHILIDAE RESEARCH IN WALLACEA: REPRODUCTIVE ISOLATION, SPECIATION, AND FUTURE DIRECTIONS IN NORTH MALUKU, INDONESIA
SUPARMAN SUPARMAN, CHUMIDACH ROINI, JAILAN SAHIL, WD. SYARNI TALA
Abstract:
The Wallacea region, positioned between the Asian (Sunda) and Australian (Sahul) continental shelves, is a globally significant biogeographic transition zone marked by high endemism and complex evolutionary histories. Although Drosophilidae are established model organisms in evolutionary biology, their diversity, reproductive isolation, and speciation in Wallacea - particularly North Maluku - remain poorly explored. This study presented the first systematic bibliometric mapping of global and regional Drosophilidae research in relation to Wallacea. Using Google Scholar (2000-2025) via Publish or Perish, records were retrieved with combined taxonomic, evolutionary, and geographic search terms, cleaned in OpenRefine, verified in Mendeley, and analyzed with VOSviewer and Bibliometrix R. Network visualizations revealed thematic clusters, collaboration networks, and temporal trends, while overlay and density maps identified emerging topics. A total of 519 publications formed 37 keyword clusters, comprising 1,437 links and a total link strength of 3,507. Three dominant thematic areas emerged: (1) genetics and molecular evolution, (2) reproductive isolation mechanisms, and (3) island biogeography. Wallacea-focused research accounted for less than 2% of all publications. Notable gaps include limited study of Wallacean endemic taxa, poor integration of genomic and ecological datasets, and minimal consideration of marine biogeographic barriers such as the Maluku Strait and Halmahera Sea. The findings underscore the need for integrative molecular, ecological, and behavioral research to investigate speciation in insular systems. Addressing these gaps could position Wallacea as a pivotal reference for island evolution studies across the Asia-Australia transition zone
Citation:
SUPARMAN SUPARMAN, CHUMIDACH ROINI, JAILAN SAHIL, WD. SYARNI TALA, 2025. BIBLIOMETRIC ANALYSIS OF DROSOPHILIDAE RESEARCH IN WALLACEA: REPRODUCTIVE ISOLATION, SPECIATION, AND FUTURE DIRECTIONS IN NORTH MALUKU, INDONESIA, Romanian Journal of Biology - Plant Biology, 70(1-2): 95–107. DOI: DOI: 10.59277/RJB-PB.2025.1-2.08.
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