Amur River Mesolithic Dawn

In the wake of the last glacial retreat, the Amur River Basin became a mosaic of braided channels, wetlands and boreal forests. Radiocarbon-dated human remains from the basin cluster between 9442 and 8475 BCE, placing these people firmly in the Mesolithic phase of northeastern China. Archaeological data indicates repeated seasonal use of river margins and islands, where fish, waterfowl and migratory game concentrated after deglaciation. Limited evidence suggests lithic assemblages characterized by small flaked tools and polished bone implements adapted to woodworking and fishing.

Cinematic landscapes of low-lying floodplains and fog-bound river mouths likely shaped mobility and social networks: camps clustered near tributaries, and resource-rich wintering spots supported small, flexible bands. While regional environmental reconstructions point to an expansion of wetland habitats around the Amur, direct stratified sequences tying technological changes to climatic shifts remain sparse. Genetic samples are few (n=5); therefore any model of population continuity or migration must be treated as provisional. Nevertheless, the convergence of riverine archaeology and new ancient-DNA results opens a window onto how early Holocene communities rooted themselves in northeastern Asia's waterways.

Ancient DNA from five individuals recovered in the Amur River Basin provides an initial glimpse into the genetic landscape of northeastern Mesolithic China. Among the five Y-chromosome calls, haplogroups C (two individuals), F (one), and DE (one) are observed; mitochondrial calls include haplogroup D in at least one sample. These haplogroups are broadly associated with early East Asian lineages: C is frequently observed in ancient and some modern northern Asian populations; F is an upstream lineage ancestral to many Eurasian branches; DE is rarer and its deep split invites caution in interpretation.

Because sample count is very low (n=5), patterns of genetic diversity, population structure, and continuity with later groups cannot be robustly established. Archaeological contexts suggest long-term riverine occupation, and the genetic signals—while preliminary—are compatible with a picture of regional continuity and local differentiation in northeastern Asia. Future broader sampling across the Amur and neighboring Siberian regions will be essential to test whether these haplogroups reflect long-standing local lineages, episodic gene flow from neighboring zones, or both. All genetic inferences here are provisional and should be treated as hypotheses for further testing.