Study Finds Microbes Vary Across One Chile Vineyard

A new study in the journal OENO One reports that grape clusters grown in the same vineyard block in Chile’s Atacama Desert can carry noticeably different bacterial and fungal communities, a finding that adds detail to the growing idea of a “microbial terroir” in winegrowing.

The paper, published May 26, examined cultivated Vitis vinifera grapes from a vineyard in one of the driest places on Earth and found that the microbiome was not uniform across the parcel. Instead, the composition of microbes varied from one part of the vineyard to another, even within a single growing area. The researchers said that this kind of intra-vineyard heterogeneity matters because microbes can influence grape health, fermentation behavior and, ultimately, how a wine expresses its place of origin.

The work was carried out by Rocio Ramirez, Hector Aguayo-Cumplido, Enrique Godoy, Michelle Cifras, Marcelo Lanino, Ingrid Poblete and Lia Ramirez-Fernandez. Their study focused on both bacterial and fungal populations on grape surfaces, an area of interest for viticulture because these organisms can affect disease pressure and the early stages of winemaking. In practical terms, the findings suggest that sampling only one part of a vineyard may miss important differences elsewhere in the block.

The Atacama Desert offers an especially stark setting for this kind of research. Its extreme aridity and strong environmental gradients make it a useful natural laboratory for studying how climate and local conditions shape microbial life on vines. The authors said that understanding these patterns could help growers refine precision viticulture practices, including targeted monitoring and more tailored decisions about vineyard management.

The study also fits into a broader effort in wine science to connect vineyard ecology with wine quality. Winemakers and researchers have increasingly looked beyond soil and weather to include the living communities on grapes and in vineyards as part of what defines a site. By showing that those communities can shift within a single parcel, the new research points to a more complex picture of vineyard identity than a simple map or soil profile can capture.

For growers, the implications are practical. If microbial populations differ across short distances, then disease scouting, harvest planning and fermentation strategies may need to account for that variation. For researchers, the findings raise questions about how irrigation, canopy structure, sun exposure and other local factors interact to shape microbial communities on fruit before harvest.

OENO One described the paper as part of its recent volume published June 1. The journal focuses on wine science and related agricultural research, including studies on grapevine performance, sensory analysis and vineyard management.