Forest loss in Indonesian New Guinea (2001–2019): Trends, drivers and outlook

Gaveau David L.A., Santos Lucas, Locatelli Bruno, Salim Mohammad A., Husnayaen Husnayaen, Meijaard Erik, Heatubun Charlie, Sheil Douglas. 2021. Forest loss in Indonesian New Guinea (2001–2019): Trends, drivers and outlook. Biological Conservation, 261:109225, 13 p.

Quartile : Q1, Sujet : BIODIVERSITY CONSERVATION / Quartile : Q1, Sujet : ECOLOGY / Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES

Résumé : The rich forests of Indonesian New Guinea are understudied and threatened. We used satellite data to examine annual forest loss, road development and plantation expansion from 2001 to 2019, then developed a model to predict future deforestation. No previous studies have attempted such a detailed assessment of past and future deforestation. In 2019, 34.29 million hectares (Mha), or 83% of Indonesian New Guinea, supported old-growth forest. Over nineteen years, 2% (0.75 Mha) were cleared: 45% (0.34 Mha) converted to industrial plantations, roads, mine tailings, or other uses near cities; 55% (0.41 Mha) cleared by transient processes including selective natural timber extraction, inland water bodies-related processes, fires, and shifting agriculture. Industrial plantations expanded by 0.23 Mha, with the majority (0.21 Mha; 28% of forest loss) replacing forests and reaching 0.28 Mha in 2019 (97% oil palm; 3% pulpwood). The Trans-Papua Highway, a ~4000 km national investment project, increased by 1554 km. Positive correlations between highway and plantations expansion indicate these are linked processes. Plantations and roads expanded rapidly after 2011, peaked in 2015/16, and declined thereafter. Indonesian government allocated 2.62 Mha of land for the development of industrial plantations (90% oil palm 10% pulpwood) of which 74% (1.95 Mha) remained forest in 2019. A spatial model predicts that an additional 4.5 Mha of forest could be cleared by 2036 if Indonesian New Guinea follows similar relationships to Indonesian Borneo. We highlight the opportunities for policy reform and the importance of working with indigenous communities, local leaders, and provincial government to protect the biological and cultural richness still embodied in this remarkable region.

Mots-clés Agrovoc : déboisement, défrichement, dépérissement des forêts, dégradation des forêts, Observation satellitaire, plantations, politique forestière

Mots-clés géographiques Agrovoc : Indonésie

Mots-clés complémentaires : Déforestation

Mots-clés libres : Deforestation, Indonesian New Guinea, Oil Palm, Plantations, Trans-Papua Highway, Satellite

Classification Agris : K70 - Dégâts causés aux forêts et leur protection
K01 - Foresterie - Considérations générales

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

• Gaveau David L.A., TheTreeMap (FRA) - auteur correspondant
• Santos Lucas, UC (USA)
• Locatelli Bruno, CIRAD-ES-UPR Forêts et sociétés (FRA) ORCID: 0000-0003-2983-1644
• Salim Mohammad A., TheTreeMap (FRA)
• Husnayaen Husnayaen, TheTreeMap (FRA)
• Meijaard Erik, University of Kent (GBR)
• Heatubun Charlie, Royal Botanic Garden (GBR)
• Sheil Douglas, Norwegian University of Life Sciences (NOR)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/598957/)

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