Madagascar’s baobabs: 1,000-year climate archives reveal colonial exploitation and systemic biodiversity loss

Malagasy communities have stewarded baobabs for millennia through agroforestry, seed-sharing, and taboos (*fady*) that limit overharvesting. These practices are dismissed in favor of Western dendrochronology, which extracts data without reciprocity. Indigenous knowledge systems, such as the *dina* (oral contracts) governing forest use, remain unrecognized in global climate frameworks like REDD+. The baobab’s decline reflects the erosion of these systems under colonial and neoliberal pressures.

Baobabs have survived cyclones, droughts, and human migrations for over 1,000 years, but their current die-off mirrors the 19th-century French colonial botanical expeditions that uprooted specimens for European gardens. The 20th-century ‘green revolution’ in Madagascar prioritized export crops (e.g., vanilla, cloves) over native species, accelerating deforestation. Historical parallels include the collapse of the Maya civilization’s agroforestry systems, also linked to colonial land grabs and monoculture expansion.

In Australia, Aboriginal peoples use baobab relatives (*Adansonia gregorii*) for medicine and water storage, embedding ecological knowledge in Dreamtime stories—unlike Western ‘data mining.’ The baobab’s cultural role in Madagascar contrasts with its commodification in global ‘carbon offset’ schemes, where its carbon sequestration is traded without consent. Comparable sacred trees in Africa (e.g., *Shea* in Burkina Faso) face similar threats from agribusiness and climate change.

Baobab rings provide high-resolution climate data, but their interpretation is limited by Western scientific biases that prioritize quantitative over qualitative methods. Recent studies show baobab mortality correlates with rising temperatures and groundwater depletion from industrial agriculture, yet funding for Indigenous-led research remains scarce. The scientific narrative often omits the role of mycorrhizal networks, which Indigenous farmers understand as ‘tree kin’ relationships essential for resilience.

Baobabs feature in Malagasy *hira gasy* (oral poetry) as symbols of endurance, contrasting with their portrayal as ‘climate clocks’ in Western media. Artists like Joël Andrianomearisoa use baobab imagery to critique ecological alienation, while global ‘eco-art’ often exoticizes them without addressing land rights. Spiritual traditions in Madagascar view baobabs as intermediaries between ancestors and the living, a perspective erased by secular scientific framing.

If current trends continue, baobab die-offs could trigger cascading ecosystem collapse, affecting pollinators like lemurs and seed-dispersing bats. Scenario modeling suggests that Indigenous agroforestry could restore 30% of degraded baobab habitats within 20 years, but requires land tenure reform and carbon credit redistribution. Future climate models must integrate Indigenous calendars (e.g., *famadihana* seasonal cycles) to improve predictive accuracy.

Malagasy farmers, particularly women, are primary custodians of baobab knowledge but are excluded from global climate negotiations. The *Tandroy* ethnic group’s *dina* systems, which protect baobab groves, are criminalized by state land laws favoring foreign investors. Migrant laborers in vanilla plantations, often from the Comoros, face displacement as baobab forests are cleared for cash crops, yet their stories are absent from climate discourse.