Jack Rieley - Academia.edu (original) (raw)

Papers by Jack Rieley

Wetlands International, 2003

Geoderma, 2008

... carbon is still stored in Indonesia's peatland. In this study we improve the current est... more ... carbon is still stored in Indonesia's peatland. In this study we improve the current estimates of carbon storage in Indonesian peatlands by using satellite derived terrain measurements, in situ peat thickness measurements and GIS modelling techniques. Remote sensing data are ...

Environmental Conservation, 1990

The popular focus of plastic waste management has been on collection and recycling. This Seminar ... more The popular focus of plastic waste management has been on collection and recycling. This Seminar will explore the source-reduction option on an international level, covering such actions as materials substitution, product and process redesign, use of more readily recyclable resins, the mixing of recycled with virgin materials, the removal or replacement of undesirable additives, the deliberate change of consumer habits, and usepatterns and similar activities. The practical, economic and technical, aspects of the source reduction will be examined in detail in order to determine its ultimate impact upon the waste-stream and the environment. The Seminar will bring together management, engineers, marketing and other interested personnel, from basic material suppliers, plastic product manufacturers, users, waste handlers, government regulatory groups, public-interest organizations, attorneys, and others, from around the world, in a unique forum designed to educate interested groups and to facilitate the discussion of this important subject. Exhibit space will be available for those wishing to display products and services. For further information contact:

Mires and Peat, 2013

Foreword to a Special Volume of the journal to illustrate the range of research shared with the i... more Foreword to a Special Volume of the journal to illustrate the range of research shared with the international peatland community at the four-yearly International Peat Congresses that are organised by the International Peat Society.

Perpustakaan Sultan Abdul Samad, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia... more Perpustakaan Sultan Abdul Samad, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. QH87.3 I61 1999 Call Number

CECEP KUSMANA 1) , SAMBAS BASUNI 2) , SRI WILARSO 3) , IIN ICHWANDI 4) OTENG HARIDJAJA 2) , AGUS ... more CECEP KUSMANA 1) , SAMBAS BASUNI 2) , SRI WILARSO 3) , IIN ICHWANDI 4) OTENG HARIDJAJA 2) , AGUS SOLEH 3) , SAMSURI 4

The Southeast Asian region is experiencing some of the world's highest rates of deforestation and... more The Southeast Asian region is experiencing some of the world's highest rates of deforestation and forest degradation, the principle drivers of which are agricultural expansion and wood extraction in combination with an increased incidence of fire. Recent changes in fire regimes in Southeast Asia are indicative of increased human-causd forest disturbance, but El Niño-Southern Oscillation (ENSO) events also play a role in exacerbating fire occurrence and severity. Fires are now occurring on a much more extensive scale-in part because forest margins are at greater risk of fire as a result of disturbance through logging activities, but also as a result of rapid, large-scale forest clearance for the establishment of plantations. Millions of hectares have been deforested and drained to make way for oil palm and pulpwood trees, and many plantation companies, particularly in Indonesia, have employed fire as a cheap land clearance tool; uncontrolled fires have entered adjacent forests or plantation estates, and burnt both the forest biomass and, in peatland areas, underlying peat. Forest fires cause changes to forest structure, biodiversity, soil and hydrology. Repeated fires over successive or every few years lead to a progressive decline in the number of primary forest species. Fire leads to reduction in both aboveground and below ground organic carbon stocks and also changes carbon cycling patterns. In non-peatland areas, losses of carbon from fire affected forest vegetation exceed greatly soil carbon losses, but on carbon-rich substrates, e.g. peat, combustion losses can be considerable. Peatland fires make a major contribution to atmospheric emissions of greenhouse gases, fine particular matter and aerosols and thus contribute to climate change as well as presenting a problem for human health. The scale of emissions is unlikely to reduce in coming decades, since climate modelling studies have predicted that parts of this region will experience lower rainfall in future and greater seasonality. Protecting the rainforests of this region from further fire disasters should be at the top of the global environmental agenda, with highest priority given to peatland areas.

Peatlands International, 2007

Page 1. TROPICAL PEATLANDS: DISTRIBUTION, EXTENT AND CARBON STORAGE UNCERTAINTIES AND KNOWLEDGE... more Page 1. TROPICAL PEATLANDS: DISTRIBUTION, EXTENT AND CARBON STORAGE UNCERTAINTIES AND KNOWLEDGE GAPS Susan E. Page1*, Christopher J. Banks1, John O. Rieley2 1Department of Geography, University ...

… on Tropical Peatlands, …, 2002

... By combining data from remote sensed images with field measurements, it has been possible to ... more ... By combining data from remote sensed images with field measurements, it has been possible to determine fire impact, carbon storage in the peatlands and carbon ... 796,906 ha); the largest scars are in areas impacted by logging forest clearance and peatland drainage. ...

Geochimica et Cosmochimica Acta, 2002

Biogeochemical processes in a forested tropical peat deposit and its record of past atmospheric d... more Biogeochemical processes in a forested tropical peat deposit and its record of past atmospheric dust deposition were assessed using the vertical distribution of lithophilic and plant essential elements in a dated core profile from Borneo, SE Asia. Peat formation started ϳ22,120 14 C yr before present (BP), and Ca/Mg mass ratios of the solid peat and very low ash contents indicate a strongly ombrotrophic character throughout the deposit, implying that most of the inorganic fraction has been supplied exclusively by atmospheric inputs. Concentration profiles of Mn, Sr, and Ca suggest a very minor influence of chemical diagenesis in the underlying sediments. Silicon, Ca, Mg, P, S, and K show a strong and extended zone of enrichment in the top 200 cm of the profile, indicating that biological accumulation mechanisms are much more extensive than in temperate peat bogs. In the lower core sections, where the element distribution is dominated solely by past atmospheric deposition, average Al/Ti ratios are similar to the upper continental crust (UCC), whereas Fe is slightly enriched and Si is strongly depleted: this condition favors highly weathered tropical soil dust as the main inorganic mineral source. Significant correlation of Al, Fe, Si, S, Ca, and Ti with the lithophilic elements Y and Zr suggests that the distribution of these elements is controlled by sources of atmospheric mineral dust. The Ca/Mg, Ca/K, and Mg/K ratios of the collected rainwater samples are similar to the global average of continental rainwater and suggest a continental character for the site. This is supported by the similarity of the average concentration of Br, Mg, Ca, and S to that in temperate continental and maritime bogs in Switzerland and Scotland. The concentration profiles of Si, Fe, Al, and Ti show distinct peaks within the profile, implying enhanced dust deposition, reduced rates of peat accumulation, or possibly both owing to climatic changes during the Holocene. Enhanced dust deposition between ϳ10,830 and 9060 14 C yr BP is tentatively interpreted as a Younger Dryas-like event with dust fluxes of ϳ10.8 mg/m 2 /yr. The variations in Al/Ti and Fe/Ti profiles suggest that mineral dust sources have been changing constantly during the Holocene, with local sources being dominant between ϳ7820 and 9500 14 C yr BP and long-range transport (derived most likely from China) being important during the late Pleistocene and early Holocene and from ϳ7820 14 C yr BP to the present.

Tropical Fire Ecology, 2009

Page 1. 9 Tropical peatland fires in Southeast Asia Susan Page, Agata Hoscilo, Andreas Langner, K... more Page 1. 9 Tropical peatland fires in Southeast Asia Susan Page, Agata Hoscilo, Andreas Langner, Kevin Tansey, Florian Siegert, Suwido Limin, and Jack Rieley 9.1 ABSTRACT Extensive tropical peatlands are located in the ...

240 Introduction Indonesian and Dutch scientists identified the principal problems of reclamation... more 240 Introduction Indonesian and Dutch scientists identified the principal problems of reclamation of tropical peatlands more than 25 years ago (Soepraptohardjo and Driessen, 1976). Apart from chemical impoverishment and the oligotrophic, acidic nature of the peat, with extremely low ash content, they also noted a range of physical problems: • slow rate of natural decomposition of organic matter linked to the high wood content; • rapid oxidation and decomposition of organic material after vegetation removal and drainage leading to a high degree of subsidence and subsequent increase in flooding; • irreversible shrinkage causing adverse water retention and increased erosion; • extremely rapid horizontal hydraulic conductivity and very slow vertical conductivity; • high heat capacity and low thermal conductivity causing major temperature variations at the surface; • low load-bearing capacity causing top-heavy tree crops to topple over and making it almost impossible to use farm machiner...

Over the last few years, the tropical peatlands of SE Asia have received both environmental and p... more Over the last few years, the tropical peatlands of SE Asia have received both environmental and political international attention particularly since the failure of the Mega Rice Project on the vast peatlands in Central Kalimantan, Indonesia and the subsequent large peatland fires during the El Niño years of 1997/98 and 2002 that blanketed the region with a persistent haze that caused health and environmental concerns. The 1997/98 peatland fires of Indonesia and Malaysia were estimated to have contributed between 0.81 and 2.57 Gt of carbon to the atmosphere as a result of burning peat and vegetation in Indonesia. Research data for peat deposits from across SE-Asia demonstrate that most have present accumulation rates of>1mm yr-1 which makes them carbon sinks. This status has been significantly altered, however, as a result of land use change to intensive timber production and agriculture, including oil palm plantations. These all require artificial lowering of the water table that...

This publication consist of papers presented at the Workshop on "Prevention and Control of Fire i... more This publication consist of papers presented at the Workshop on "Prevention and Control of Fire in Peatlands" held from 19 th to 21 st of March 2002 which was attended by almost 70 representatives from Federal and State agencies, NGOs and research institutions in Malaysia, and regional representatives from ARCBC, Wetlands International Indonesia Programme and Alterra.

Global change biology, Mar 27, 2016

The first International Peat Congress (IPC) held in the tropics - in Kuching (Malaysia) - brought... more The first International Peat Congress (IPC) held in the tropics - in Kuching (Malaysia) - brought together over 1000 international peatland scientists and industrial partners from across the world ("International Peat Congress with over 1000…