Analysis of Medieval Burials from Ibiza Reveals Genetic and Pathogenic Diversity During the Islamic Period
Rodríguez-Varela et al. · doi:10.1038/s41467-026-70615-9
What the study found
Ibiza was conquered in 902 CE under the Umayyad Emirate of Córdoba and remained under Islamic rule until 1235 CE. In this 2026 study published in Nature Communications , Rodríguez-Varela and colleagues analyzed genome-wide ancient DNA and metagenomics from 13 individuals buried in an Islamic cemetery in Ibiza, dated securely to 950–1150 CE.
Genome-wide analyses revealed substantial genetic diversity, with ancestral components tracing to local Western European, North African, and Sub-Saharan African populations. The authors estimated that North African gene flow occurred 2 to 7 generations prior to these individuals, providing empirical genetic validation for historical Arabic sources documenting a **two-pulse demographic model**: an initial 10th-century conquest settlement followed by a major 12th-century North African population influx associated with the Almoravid movement.
Sub-Saharan ancestry components in specific individuals were traced to Senegambia and southern Chad, directly evidencing medieval trans-Saharan connectivity across Islamic trade networks.
Key points
Sequenced 13 ancient genomes from medieval Islamic Ibiza (950–1150 CE).
Empirically confirmed North African gene flow occurring 2–7 generations prior to burial.
Validated historical records of a **two-pulse demographic model**: 10th-century Umayyad conquest + 12th-century Almoravid movement.
Identified direct genetic links to Sub-Saharan regions (Senegambia, Chad), documenting medieval trans-Saharan networks.
Demonstrates the extensive trans-Mediterranean movement of Maghrebi populations during the medieval Islamic era.
Relevance to this lineage
This study directly documents the outward expansion of North African populations into the western Mediterranean during the Almoravid era (11th–12th centuries CE)—a period centered around southwestern Morocco and the Souss region. It illustrates how Maghrebi lineages actively participated in shaping the demographic and cultural landscape of Al-Andalus and the Mediterranean islands.
This is a summary, not the paper
Written here as an aid to reading. Where this page and the study disagree, the study is right — read it. Full citation: Rodríguez-Varela, R. et al. (2026). Nature Communications , 17, 70615. All fifteen summaries are listed on the research page.
Last updated: 16 September 2026