Calcium is an essential element for many animals, and it is especially critical for shelled invertebrates. Calcium is usually derived from rock-forming minerals in the bedrock and atmospheric deposition (e.g. precipitation). Therefore, the abundance of calcium in forest ecosystems can be altered based on their supply from these two sources. Our previous studies showed the degree of weathering of rock-forming calcium may be altered by forest vegetation types due to the variation in physiological characteristics of plants. For example, based on the results of strontium isotope analysis, Ohta et al. (2018) showed there was more calcium from the bedrock present in stream water at sites dominated by Cryptomeria japonica than in stream water and soil at broad-leaved forest sites. The reason that C. japonica accumulates calcium in the soil is due in part to high root activities such as a high exudation rate of organic acids from roots. Furthermore, the variations in calcium availability in soil, promoted by aboveground vegetation, can alter the abundance of invertebrates with high calcium requirements (Ohta et al. 2014). These results indicate forest vegetation type shapes calcium dynamics in forest and invertebrate communities.