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Subsidence and carbon dioxide emissions in a smallholder peatland mosaic in Sumatra, Indonesia.
Mitig Adapt Strateg Glob Chang 2019; 24(1):147-163MA

Abstract

Most attention in quantifying carbon dioxide (CO2) emissions from tropical peatlands has been on large-scale plantations (industrial timber, oil palm (Elaeis guinensis)), differing in drainage and land-use practices from those of smallholder farms. We measured subsidence and changes in bulk density and carbon organic content to calculate CO2 emissions over 2.5 years in a remnant logged-over forest and four dominant smallholder land-use types in Tanjung Jabung Barat District, Jambi Province, Sumatra, Indonesia: (1) simple rubber (Hevea brasiliensis) agroforest (> 30 years), (2) mixed coconut (Cocos nucifera) and coffee gardens (Coffea liberica) (> 40 years), (3) mixed betel nut (Areca catechu) and coffee gardens (> 20 years), and (4) oil palm plantation (1 year). We quantified changes in microtopography for each site for greater accuracy of subsidence estimates and tested the effects of nitrogen and phosphorus application. All sites had a fibric type of peat with depths of 50 to > 100 cm. A recently established oil palm had the highest rate of peat subsidence and emission (4.7 cm year-1 or 121 Mg CO2 ha-1 year-1) while the remnant forest had the lowest (1.8 cm year-1 or 40 Mg CO2 ha-1 year-1). Other land-use types subsided by 2-3 cm year-1, emitting 70-85 Mg CO2 ha-1 year-1. Fertilizer application did not have a consistent effect on inferred emissions. Additional emissions in the first years after drainage, despite groundwater tables of 40 cm, were of the order of belowground biomass of peat forest. Despite maintaining higher water tables, smallholder landscapes have CO2 emissions close to, but above, current IPCC defaults.

Authors+Show Affiliations

Southeast Asia Regional Programme, World Agroforestry Centre (ICRAF), Jl. CIFOR, Situgede, Sindang Barang, Bogor, 16115 Indonesia. 2Plant Production Systems, Department of Plant Sciences, Wageningen University and Research, 6708 PB Wageningen, the Netherlands.Southeast Asia Regional Programme, World Agroforestry Centre (ICRAF), Jl. CIFOR, Situgede, Sindang Barang, Bogor, 16115 Indonesia. 2Plant Production Systems, Department of Plant Sciences, Wageningen University and Research, 6708 PB Wageningen, the Netherlands.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30662320

Citation

Khasanah, Ni'matul, and Meine van Noordwijk. "Subsidence and Carbon Dioxide Emissions in a Smallholder Peatland Mosaic in Sumatra, Indonesia." Mitigation and Adaptation Strategies for Global Change, vol. 24, no. 1, 2019, pp. 147-163.
Khasanah N, van Noordwijk M. Subsidence and carbon dioxide emissions in a smallholder peatland mosaic in Sumatra, Indonesia. Mitig Adapt Strateg Glob Chang. 2019;24(1):147-163.
Khasanah, N., & van Noordwijk, M. (2019). Subsidence and carbon dioxide emissions in a smallholder peatland mosaic in Sumatra, Indonesia. Mitigation and Adaptation Strategies for Global Change, 24(1), pp. 147-163. doi:10.1007/s11027-018-9803-2.
Khasanah N, van Noordwijk M. Subsidence and Carbon Dioxide Emissions in a Smallholder Peatland Mosaic in Sumatra, Indonesia. Mitig Adapt Strateg Glob Chang. 2019;24(1):147-163. PubMed PMID: 30662320.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Subsidence and carbon dioxide emissions in a smallholder peatland mosaic in Sumatra, Indonesia. AU - Khasanah,Ni'matul, AU - van Noordwijk,Meine, Y1 - 2018/03/21/ PY - 2017/12/29/received PY - 2018/03/06/accepted PY - 2019/1/22/entrez PY - 2019/1/22/pubmed PY - 2019/1/22/medline KW - Agroforestry KW - CO2 emissions KW - Fertilizer application KW - Peat subsidence KW - Smallholder KW - Tropical peatlands SP - 147 EP - 163 JF - Mitigation and adaptation strategies for global change JO - Mitig Adapt Strateg Glob Chang VL - 24 IS - 1 N2 - Most attention in quantifying carbon dioxide (CO2) emissions from tropical peatlands has been on large-scale plantations (industrial timber, oil palm (Elaeis guinensis)), differing in drainage and land-use practices from those of smallholder farms. We measured subsidence and changes in bulk density and carbon organic content to calculate CO2 emissions over 2.5 years in a remnant logged-over forest and four dominant smallholder land-use types in Tanjung Jabung Barat District, Jambi Province, Sumatra, Indonesia: (1) simple rubber (Hevea brasiliensis) agroforest (> 30 years), (2) mixed coconut (Cocos nucifera) and coffee gardens (Coffea liberica) (> 40 years), (3) mixed betel nut (Areca catechu) and coffee gardens (> 20 years), and (4) oil palm plantation (1 year). We quantified changes in microtopography for each site for greater accuracy of subsidence estimates and tested the effects of nitrogen and phosphorus application. All sites had a fibric type of peat with depths of 50 to > 100 cm. A recently established oil palm had the highest rate of peat subsidence and emission (4.7 cm year-1 or 121 Mg CO2 ha-1 year-1) while the remnant forest had the lowest (1.8 cm year-1 or 40 Mg CO2 ha-1 year-1). Other land-use types subsided by 2-3 cm year-1, emitting 70-85 Mg CO2 ha-1 year-1. Fertilizer application did not have a consistent effect on inferred emissions. Additional emissions in the first years after drainage, despite groundwater tables of 40 cm, were of the order of belowground biomass of peat forest. Despite maintaining higher water tables, smallholder landscapes have CO2 emissions close to, but above, current IPCC defaults. SN - 1573-1596 UR - https://www.unboundmedicine.com/medline/citation/30662320/Subsidence_and_carbon_dioxide_emissions_in_a_smallholder_peatland_mosaic_in_Sumatra_Indonesia_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30662320/ DB - PRIME DP - Unbound Medicine ER -