Forest biomass is a fundamental ecological concept and research field concerned with the quantitative assessment of organic matter within forest ecosystems. This domain systematically investigates the accumulation, spatial distribution, structural composition, and temporal dynamics of living and dead plant material, encompassing trees, understory vegetation, and detritus. Its significance is paramount for understanding ecosystem carbon cycles, productivity, nutrient dynamics, biodiversity support, and for informing sustainable forest management, bioenergy potential assessment, and climate change modeling.