This study examined the effect of climate change on soil bacterial and fungal abundance in coast redwood forests. Soil samples were taken from three sites along a north-south climate gradient and transplanted between sites. After one and three years, bacterial and fungal abundances were measured. Bacterial abundance decreased when soils were moved from wet to dry climates, and increased from dry to wet climates. Fungal abundance was less sensitive to climate changes. The results suggest that declining fog and increasing temperatures from climate change may decrease bacterial abundance in redwood forests over time.