Species diversity and carbon storage in agroforestry systems of Toraja highlands, Indonesia

Abstract

Agroforestry practices of the Toraja highland have been developed for along time. This study determined the species diversity and carbon storage potential of the agroforestry at the high land of Toraja. A total of 30 sampling plots, 50 m × 20 m, were selected to represent different altitudes and agroforestry systems. The species diversity was analysed by identifying the constituent species in the agroforest, and biomass and carbon storage potentials of the aboveground parts were measured and analysed. Results revealed that the spatial distribution patterns of plants in the agroforestry systems were random and the selected tree species were generally related to the sites altitude. Meanwhile, the diversity species index was moderate, ranging from 1.87 to 2.14. The mean proportion of the total carbon stored in the aboveground parts for trees was 77.458 tons per ha (97.74%), litter was 1.272 tons/ha (1.61%), and undergrowth was 0.516 tons/ha (0.65%). This study contributes to the adaptation and mitigation of future climate change through the sustainable management of the highland Agroforestry systems.

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