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1. Denial of long-term issues with agriculture on tropical peatlands will have devastating consequences

Author

Wijedasa, LS, Jauhiainen, J, Kononen, M, Lampela, M, Vasander, H, Leblanc, MC, Evers, S, Smith, TEL, Yule, CM, Varkkey, H, Lupascu, M, Parish, F, Singleton, I, Clements, GR, Aziz, SA, Harrison, ME, Cheyne, S, Anshari, GZ, Meijaard, E, Goldstein, JE, Waldron, S, Hergoualc'h, K, Dommain, R, Frolking, S, Evans, CD, Posa, MRC, Glaser, PH, Suryadiputra, N, Lubis, R, Santika, T, Padfield, R, Kurnianto, S, Hadisiswoyo, P, Lim, TW, Page, SE, Gauci, V, Van der Meer, PJ, Buckland, H, Garnier, F, Samuel, MK, Choo, LNLK, O'Reilly, P, Warren, M, Suksuwan, S, Sumarga, E, Jain, A, Laurance, WF, Couwenberg, J, Joosten, H, Vernimmen, R, Hooijer, A, Malins, C, Cochrane, MA, Perumal, B, Siegert, F, Peh, KSH, Corneau, LP, Verchot, L, Harvey, CF, Cobb, A, Jaafar, Z, Wosten, H, Manuri, S, Muller, M, Giesen, W, Phelps, J, Yong, DL, Silvius, M, Wedeux, BMM, Hoyt, A, Osaki, M, Hirano, T, Takahashi, H, Kohyama, TS, Haraguchi, A, Nugroho, NP, Coomes, DA, Quoi, LP, Dohong, A, Gunawan, H, Gaveau, DLA, Langner, A, Lim, FKS, Edwards, DP, Giam, X, Van der Werf, G, Carmenta, R, Verwer, CC, Gibson, L, Grandois, L, Graham, LLB, Regalino, J, Wich, SA, Rieley, J, Kettridge, N, Brown, C, Pirard, R, Moore, S, Capilla, BR, Ballhorn, U, Ho, HC, Hoscilo, A, Lohberger, S, Evans, TA, Yulianti, N, Blackham, G, Onrizal, Husson, S, Murdiyarso, D, Pangala, S, Cole, LES, Tacconi, L, Segah, H, Tonoto, P, Lee, JSH, Schmilewski, G, Wulffraat, S, Putra, EI, Cattau, ME, Clymo, RS, Morrison, R, Mujahid, A, Miettinen, J, Liew, SC, Valpola, S, Wilson, D, D'Arcy, L, Gerding, M, Sundari, S, Thornton, SA, Kalisz, B, Chapman, SJ, Su, ASM, Basuki, I, Itoh, M, Traeholt, C, Sloan, S, Sayok, AK, Andersen, R, Wijedasa, LS, Jauhiainen, J, Kononen, M, Lampela, M, Vasander, H, Leblanc, MC, Evers, S, Smith, TEL, Yule, CM, Varkkey, H, Lupascu, M, Parish, F, Singleton, I, Clements, GR, Aziz, SA, Harrison, ME, Cheyne, S, Anshari, GZ, Meijaard, E, Goldstein, JE, Waldron, S, Hergoualc'h, K, Dommain, R, Frolking, S, Evans, CD, Posa, MRC, Glaser, PH, Suryadiputra, N, Lubis, R, Santika, T, Padfield, R, Kurnianto, S, Hadisiswoyo, P, Lim, TW, Page, SE, Gauci, V, Van der Meer, PJ, Buckland, H, Garnier, F, Samuel, MK, Choo, LNLK, O'Reilly, P, Warren, M, Suksuwan, S, Sumarga, E, Jain, A, Laurance, WF, Couwenberg, J, Joosten, H, Vernimmen, R, Hooijer, A, Malins, C, Cochrane, MA, Perumal, B, Siegert, F, Peh, KSH, Corneau, LP, Verchot, L, Harvey, CF, Cobb, A, Jaafar, Z, Wosten, H, Manuri, S, Muller, M, Giesen, W, Phelps, J, Yong, DL, Silvius, M, Wedeux, BMM, Hoyt, A, Osaki, M, Hirano, T, Takahashi, H, Kohyama, TS, Haraguchi, A, Nugroho, NP, Coomes, DA, Quoi, LP, Dohong, A, Gunawan, H, Gaveau, DLA, Langner, A, Lim, FKS, Edwards, DP, Giam, X, Van der Werf, G, Carmenta, R, Verwer, CC, Gibson, L, Grandois, L, Graham, LLB, Regalino, J, Wich, SA, Rieley, J, Kettridge, N, Brown, C, Pirard, R, Moore, S, Capilla, BR, Ballhorn, U, Ho, HC, Hoscilo, A, Lohberger, S, Evans, TA, Yulianti, N, Blackham, G, Onrizal, Husson, S, Murdiyarso, D, Pangala, S, Cole, LES, Tacconi, L, Segah, H, Tonoto, P, Lee, JSH, Schmilewski, G, Wulffraat, S, Putra, EI, Cattau, ME, Clymo, RS, Morrison, R, Mujahid, A, Miettinen, J, Liew, SC, Valpola, S, Wilson, D, D'Arcy, L, Gerding, M, Sundari, S, Thornton, SA, Kalisz, B, Chapman, SJ, Su, ASM, Basuki, I, Itoh, M, Traeholt, C, Sloan, S, Sayok, AK, and Andersen, R

Abstract

Letter

Published
2017

2. Effects of distance from canal and degradation history on peat bulk density in a degraded tropical peatland.

Author

Sinclair AL, Graham LLB, Putra EI, Saharjo BH, Applegate G, Grover SP, and Cochrane MA

Subjects
Asia, Southeastern, Conservation of Natural Resources, Fires, Forests, Groundwater, Ecosystem, Soil
Abstract

Over recent decades, the combination of deforestation, peat drainage and fires have resulted in widespread degradation of Southeast Asia's tropical peatlands. These disturbances are generally thought to increase peat soil bulk density through peat drying and shrinkage, compaction, and consolidation. Biological oxidation and fires burning across these landscapes also consume surface peat, exposing older peat strata. The prevalence and severity of deforestation, peat drainage and fire are typically greater closer to canals, built to drain peatlands and provide access routes for people. We compared bulk densities of 240cm peat profiles from intact forests and degraded peatlands broadly, and also assessed differences between degraded peatlands near-to-canals (50-200m from the nearest canal) and far-from-canals (300+ m from the nearest canal). The effects of vegetation type and fire frequency on bulk density, irrespective of the distance from canal, were also investigated. Mean bulk density values ranged between 0.08 and 0.16gcm -3 throughout the 240cm peat profiles. Drainage of peat near-to-canals increased bulk density of peat above the minimum water table depth. Degradation by deforestation and fire also increased bulk densities of upper peat strata, albeit with greater variability. Peat sampled further from canals experienced less intense water table drawdowns, buffering them from drainage effects. These areas were also more commonly forested and burnt less frequently. Differences in bulk densities below minimum water table levels are less clear, but may reflect lowering of the current peat surface in degraded peatlands broadly. These results clearly show that important differences in bulk density exist across degraded peatlands that are spatially dependent on distance from canals and disturbance history. These landscape features should be taken into account when designing future bulk density sampling efforts and peatland restoration programs, or when extrapolating from existing sources in order to make accurate inferences from them., (Copyright © 2019 Elsevier B.V. All rights reserved.)

Published
2020
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3. Denial of long-term issues with agriculture on tropical peatlands will have devastating consequences.

Author

Wijedasa LS, Jauhiainen J, Könönen M, Lampela M, Vasander H, Leblanc MC, Evers S, Smith TE, Yule CM, Varkkey H, Lupascu M, Parish F, Singleton I, Clements GR, Aziz SA, Harrison ME, Cheyne S, Anshari GZ, Meijaard E, Goldstein JE, Waldron S, Hergoualc'h K, Dommain R, Frolking S, Evans CD, Posa MR, Glaser PH, Suryadiputra N, Lubis R, Santika T, Padfield R, Kurnianto S, Hadisiswoyo P, Lim TW, Page SE, Gauci V, Van Der Meer PJ, Buckland H, Garnier F, Samuel MK, Choo LN, O'Reilly P, Warren M, Suksuwan S, Sumarga E, Jain A, Laurance WF, Couwenberg J, Joosten H, Vernimmen R, Hooijer A, Malins C, Cochrane MA, Perumal B, Siegert F, Peh KS, Comeau LP, Verchot L, Harvey CF, Cobb A, Jaafar Z, Wösten H, Manuri S, Müller M, Giesen W, Phelps J, Yong DL, Silvius M, Wedeux BM, Hoyt A, Osaki M, Hirano T, Takahashi H, Kohyama TS, Haraguchi A, Nugroho NP, Coomes DA, Quoi LP, Dohong A, Gunawan H, Gaveau DL, Langner A, Lim FK, Edwards DP, Giam X, Van Der Werf G, Carmenta R, Verwer CC, Gibson L, Gandois L, Graham LL, Regalino J, Wich SA, Rieley J, Kettridge N, Brown C, Pirard R, Moore S, Capilla BR, Ballhorn U, Ho HC, Hoscilo A, Lohberger S, Evans TA, Yulianti N, Blackham G, Onrizal, Husson S, Murdiyarso D, Pangala S, Cole LE, Tacconi L, Segah H, Tonoto P, Lee JS, Schmilewski G, Wulffraat S, Putra EI, Cattau ME, Clymo RS, Morrison R, Mujahid A, Miettinen J, Liew SC, Valpola S, Wilson D, D'Arcy L, Gerding M, Sundari S, Thornton SA, Kalisz B, Chapman SJ, Su AS, Basuki I, Itoh M, Traeholt C, Sloan S, Sayok AK, and Andersen R

Published
2017
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4. Peat-fire-related air pollution in Central Kalimantan, Indonesia.

Author

Hayasaka H, Noguchi I, Putra EI, Yulianti N, and Vadrevu K

Subjects
Air Pollutants analysis, Air Pollution analysis, Environmental Monitoring, Indonesia, Particulate Matter analysis, Weather, Air Pollution statistics & numerical data, Fires, Soil
Abstract

The past decade marked record high air pollution episodes in Indonesia. In this study, we specifically focus on vegetation fires in Palangkaraya located near a Mega Rice Project area in Indonesia. We analyzed various gaseous air pollution data such as particulate matter (PM10), SO2, CO, O3, and NO2 study region. We also conducted elemental analysis at two different sites. Results from 2001 to 2010 suggested the longest hazardous air pollution episode during 2002 lasting about 80 days from mid-August to late-October. Maximum peak concentrations of PM10, SO2, CO, and O3 were also observed during 2002 and their values reached 1905, 85.8, 38.3, and 1003×10(-6) gm(-3) respectively. Elemental analysis showed significant increase in concentrations during 2011 and 2010. Satellite retrieved fires and weather data could explain most of the temporal variations. Our results highlight peat fires as a major contributor of photochemical smog and air pollution in the region., (Copyright © 2014 Elsevier Ltd. All rights reserved.)

Published
2014
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