Predicting habitat suitability of Dalbergia latifolia Roxb. (Indian rosewood) using MaxEnt: implications for conservation and sustainable forest management
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Résumé
BACKGROUND: Dalbergia latifolia Roxb. (Indian rosewood) is a leguminous tropical hardwood of high ecological and economic value, native to India’s tropical and subtropical forests. Its richly coloured, durable heartwood and acoustic qualities make it a prized timber in domestic and international markets. Ecologically, the species contributes to forest health by stabilising soils, fixing atmospheric nitrogen, and supporting associated biodiversity. However, populations have sharply declined due to illegal logging, unsustainable harvesting, and habitat loss. It is currently classified as Vulnerable on the IUCN Red List (2020, Criteria A1cd), Near Threatened in India (IUCN, 2018), and has been listed in CITES Appendix II since 2016. India remains the largest global supplier, with Karnataka contributing over 50% of national output. Yet, less than 1% of its standing stock is under managed cultivation due to slow growth, long rotations, and restrictive harvest policies. While initiatives such as CAMPA and the National Agroforestry Policy have encouraged enrichment planting, efforts remain fragmented and lack spatially explicit data for prioritisation. RESULTS: Using Maximum Entropy (MaxEnt) modelling with high-resolution climate data, we generated the first range-wide habitat suitability maps for D. latifolia in India. The model showed high predictive accuracy (AUC = 0.912), identifying tropical dry and moist deciduous zones as primary habitats. High-suitability areas were concentrated in the southern Western Ghats, especially Karnataka, Kerala, and Tamil Nadu, with additional patches in Maharashtra and Madhya Pradesh. Among 19 bioclimatic variables, annual mean temperature, temperature seasonality, and precipitation of the driest quarter were most influential. Accuracy improved through spatial filtering and validation of occurrence records. Despite broad climatically suitable areas, only 17.2% overlapped with existing Protected Areas, revealing major conservation gaps. CONCLUSIONS: This study provides the first high-resolution, range-wide habitat suitability assessment for Dalbergia latifolia in India. The findings offer a scientific basis for conservation prioritisation, in-situ restoration, ex-situ conservation, and ecologically informed plantation design. The results are directly relevant to national initiatives such as CAMPA and the CAMPA-funded AICRP-28 on D. latifolia, where spatially explicit data can guide resource allocation, site prioritisation, and restoration planning. Beyond rosewood, the MaxEnt framework demonstrated here can be applied to other threatened or commercially important tropical tree species. Future modelling that integrates land-use change and high-resolution climate projections will further strengthen adaptive management and ensure the long-term conservation of climate-sensitive species under changing environments.
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Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle