Gendered species preferences link tree diversity and carbon stocks in Cacao agroforest in Southeast Sulawesi, Indonesia

Rika Ratna Sari*, Danny Dwi Saputra, Kurniatun Hairiah, Danaë M.A. Rozendaal, James M. Roshetko, Meine Van Noordwijk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

The degree to which the maintenance of carbon (C) stocks and tree diversity can be jointly achieved in production landscapes is debated. C stocks in forests are decreased by logging before tree diversity is affected, while C stocks in monoculture tree plantations increase, but diversity does not. Agroforestry can break this hysteresis pattern, relevant for policies in search of synergy. We compared total C stocks and tree diversity among degraded forest, complex cacao/fruit tree agroforests, simple shade-tree cacao agroforestry, monoculture cacao, and annual crops in the Konawe District, Southeast Sulawesi, Indonesia. We evaluated farmer tree preferences and the utility value of the system for 40 farmers (male and female). The highest tree diversity (Shannon-Wiener H index 2.36) and C stocks (282 Mg C ha-1) were found in degraded forest, followed by cacao-based agroforestry systems (H index ranged from 0.58-0.93 with C stocks of 75-89 Mg ha-1). Male farmers selected timber and fruit tree species with economic benefits as shade trees, while female farmers preferred production for household needs (fruit trees and vegetables). Carbon stocks and tree diversity were positively related (R2 = 0.72). Adding data from across Indonesia (n = 102), agroforestry systems had an intermediate position between forest decline and reforestation responses. Maintaining agroforestry in the landscape allows aboveground C stocks up to 50 Mg ha-1 and reduces biodiversity loss. Agroforestry facilitates climate change mitigation and biodiversity goals to be addressed simultaneously in sustainable production landscapes.

Original languageEnglish
Article number108
JournalLand
Volume9
Issue number4
DOIs
Publication statusPublished - 3 Apr 2020

Keywords

  • Cacao agroforestry
  • Carbon storage
  • Farmer tree preference
  • Utility value

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