Researchers studied the bacteria in the soil around Betula platyphylla trees in the Daqing Mountains. They found that the bacteria belonged to various groups, with Proteobacteria, Acidobacteria, and Actinobacteria being the most common. The bacteria in different areas had different species compositions and adaptability to their environments. Factors like nitrogen levels, pH, and water content had the most impact on the bacteria in the soil. This study provides insights into how bacteria in the soil around trees are structured and influenced by their surroundings.