Allometric Models for Estimating Biomass and Carbon Stocks in Natural and Homestead Highland Bamboo Stands in the Sidama Region, Ethiopia

Highland bamboo (Oldeania alpina) plays a vital role in supporting local livelihoods, fostering biodiversity conservation and sustainable land management. Despite these benefits, its significant potential for carbon sequestration remains underutilized within Ethiopia’s climate mitigation strategies. In this study, we developed site-specific allometric equations to assess the biomass and carbon storage potential of highland bamboo. Data were collected from the Garamba natural bamboo forest and Hula homestead bamboo stands in the Sidama Regional State, Southern Ethiopia. Data on stand density and structure were gathered using systematically laid transects and sample plots, while plant samples were analyzed in the laboratory to determine the dry-to-fresh weight ratios. We developed allometric models to estimate the aboveground biomass (AGB) and carbon stock. The study results indicated that homestead bamboo stands exhibited higher biomass accumulation than natural bamboo stands. The AGB was estimated at 92.3 Mg ha⁻1 in the natural forest and 118.3 Mg ha⁻1 in homestead bamboo stands, with total biomass carbon storage of 52.1 Mg ha⁻1 and 66.7 Mg ha⁻1, respectively. The findings highlight the significant potential of highland bamboo for carbon sequestration in both natural stands and homesteads. Sustainable management of natural highland bamboo stands and integrating bamboo into farms can contribute to climate change mitigation, support ecosystem restoration, and enhance the socio-economic development of communities.