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Sediment metagenome

ABSTRACT: Amplicon sequencing for bacterial and ciliophoran assemblages in the tidal flat across the Japan archipelago

PROVIDER: PRJDB15429 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	DRR453393_1.fastq.gz	Fastqsanger.gz
	DRR453393_2.fastq.gz	Fastqsanger.gz
	DRR453394_1.fastq.gz	Fastqsanger.gz
	DRR453394_2.fastq.gz	Fastqsanger.gz
	DRR453395_1.fastq.gz	Fastqsanger.gz

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Project description:Lions and tigers, as dominant apex predators, likely became competitors when lions expanded from Africa into Eurasia approximately one million years ago (Ma), forming a lion–tiger transition belt from the Middle East through Central Asia to the Russian Far East. At the easternmost edge of this zone, the Japanese Archipelago has long been considered a Late Pleistocene tiger refugium, supported by large felid subfossils traditionally attributed to tigers (Panthera tigris), though their taxonomic identity remained unresolved. To clarify the origin, evolutionary history, and biogeography of Japan’s Pleistocene felids, we analyzed 26 ancient specimens previously assumed to be tigers. Using mitochondrial and nuclear genome hybridization capture and sequencing, paleoproteomics, Bayesian molecular dating, and radiocarbon dating, we found that all ancient Japanese “tiger” remains yielding molecular data were, unexpectedly, cave lions (Panthera spelaea). One specimen was radiocarbon dated to 31,060 ± 190 BP. These cave lions likely dispersed to the Japanese Archipelago between ~72.7 and 37.5 thousand years ago (ka), when a land bridge connected northern Japan to the mainland during the Last Glacial Period. Our findings challenge the long-held view that tigers once took refuge in Japan, showing instead that cave lions were widespread in northeast Asia during this period and were the Panthera lineage that colonized Japan, reaching even its southwestern regions despite habitats previously thought to favor tigers.

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