Fluxes of dissolved organic carbon in two tropical forest ecosystems of East Kalimantan, Indonesia

Fujii, Kazumichi; Uemura, Mari; Hayakawa, Chie; Funakawa, Shinya; Sukartiningsih,; Kosaki, Takashi; Ohta, Seiichi

doi:10.1016/j.geoderma.2009.05.028

Cited by 76 publications

(73 citation statements)

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“…The TOC and TN contents and the C/N ratios are also similar for both soils (Tables 3 and 4), and are comparable to values measured in pristine forest soils in the East Kalimantan Province, Indonesia (Fujii et al, 2009), humid tropical primary forest soils in Sumatra (van Noordwijk et al, 1997), and ferralitic soils under tropical rainforest originate from different countries around the world like Brazil, Indonesia, Zaire, … (Kauffman et al, 1998). Several inferences can be made from these results:…”

Section: Production and Evolution Of Som In Volcanic Tropical Soilssupporting

confidence: 76%

“…Taiwan, New Zealand, Guadeloupe), the majority part of the organic carbon export occurs during flood events (Hilton et al, 2008a;Fujii et al, 2009;Bass et al, 2011;Lloret et al, 2013). Accordingly, the sources of organic carbon exported from the catchments vary with the hydrological stage, in particular for small rivers (Lloret et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Sources of dissolved organic carbon in small volcanic mountainous tropical rivers, examples from Guadeloupe (French West Indies)

et al. 2016

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Section: Production and Evolution Of Som In Volcanic Tropical Soilssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Sources of dissolved organic carbon in small volcanic mountainous tropical rivers, examples from Guadeloupe (French West Indies)

et al. 2016

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“…3). Ultisols are characterized by argillic horizons (clay illuviation) due to clay migration from surface horizon to deeper horizons (lessivage), but clay destruction by acidification can also contribute to loss of clays in the surface soil horizons (Fujii et al 2009). The low concentrations of iron oxides and dominance of permanent-charged 2:1 type clay minerals lead to instability of soil structure and poor water drainage (Sollins et al 1988).…”

Section: +mentioning

confidence: 99%

Plant–soil interactions maintain biodiversity and functions of tropical forest ecosystems

Fujii

Shibata

Kitajima

et al. 2017

Ecological Research

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117

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Tropical forests are characterized by high biodiversity and aboveground biomass growing on strongly weathered soils. However, the distribution of plant species and soils are highly variable even within a tropical region. This paper reviews existing and novel knowledge on soil genesis, plant and microbial physiology, and biogeochemistry. Typically, forests in Southeast Asia are dominated by dipterocarps growing on acidic Ultisols from relatively young parent material. In the Neotropics and Africa, forests contain abundant legume trees growing on Oxisols developed in the older parent materials on stable continental shields. In Southeast Asia, the removal of base cations from the surface soil due to leaching and uptake by dipterocarp trees result in intensive acidification and accumulation of exchangeable Al 3+ , which is toxic to most plants. Nutrient mining by ectomycorrhizal fungi and efficient allocation within tree organs can supply phosphorus (P) for reproduction (e.g., mast fruiting) even on P-limited soils. In the Neotropics and Africa, nitrogen (N) fixation by legume trees can ameliorate N or P limitation but excess N can promote acidification through nitrification. Biological weathering [e.g., plant silicon (Si) cycling] and leaching can lead to loss of Si from soil. The resulting accumulation of Al and Fe oxides in Oxisols that can reduce P solubility through sorption and lead to limitation of P relative to N. Thus, geographical variation in geology and plant species drives patterns of soil weathering and niche differentiation at the global scale in tropical forests.

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“…However, inputs of dissolved organic C to the forest floor in litter leachate and throughfall are reduced during the dry season, particularly during periods of very low rainfall (e.g., January to February during the current study year, when\12 mm of rain fell in two months). Inputs of DOC from litter leaching can be considerable and can make an important contribution to organic matter in mineral soil (Fujii et al 2009(Fujii et al , 2011. For example, litter leachate contributed 277 kg C ha -1 y -1 to the soil in a tropical forest under a perudic moisture regime in Costa Rica, much of which occurred in stable high-molecular weight compounds that were retained in the soil through sorption to mineral surfaces (Schwendenmann and Veldkamp 2005).…”

Section: Seasonal Dynamics Of Soil Organic Mattermentioning

confidence: 99%

Seasonal changes in soil organic matter after a decade of nutrient addition in a lowland tropical forest

Turner¹,

Yavitt

Harms

et al. 2015

Biogeochemistry

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Soil organic matter is an important pool of carbon and nutrients in tropical forests. The majority of this pool is assumed to be relatively stable and to turn over slowly over decades to centuries, although changes in nutrient status can influence soil organic matter on shorter timescales. We measured carbon, nitrogen, and phosphorus concentrations in soil organic matter and leaf litter over an annual cycle in a long-term nutrient addition experiment in lowland tropical rain forest in the Republic of Panama. Total soil carbon was not affected by a decade of factorial combinations of nitrogen, phosphorus, or potassium. Nitrogen addition increased leaf litter nitrogen concentration by 7 % but did not affect total soil nitrogen. Phosphorus addition doubled the leaf litter phosphorus concentration and increased soil organic phosphorus by 50 %. Surprisingly, concentrations of carbon, nitrogen, and phosphorus in soil organic matter declined markedly during the four-month dry season, and then recovered rapidly during the following wet season. Between the end of the wet season and the late dry season, total soil carbon declined by 16 %, total nitrogen by 9 %, and organic phosphorus by between 19 % in control plots and 25 % in phosphorus addition plots. The decline in carbon and nitrogen was too great to be explained by changes in litter fall, bulk density, or the soil microbial biomass. However, a major proportion of the dry-season decline in soil organic phosphorus was explained by a corresponding decline in the soil microbial biomass. These results have important implications for our understanding of the stability and turnover of organic matter in tropical forest soils, because they demonstrate that a considerable fraction of the soil organic matter is seasonally transient, despite the overall pool being relatively insensitive to long-term changes in nutrient status.

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Fluxes of dissolved organic carbon in two tropical forest ecosystems of East Kalimantan, Indonesia

Cited by 76 publications

References 50 publications

Sources of dissolved organic carbon in small volcanic mountainous tropical rivers, examples from Guadeloupe (French West Indies)

Sources of dissolved organic carbon in small volcanic mountainous tropical rivers, examples from Guadeloupe (French West Indies)

Plant–soil interactions maintain biodiversity and functions of tropical forest ecosystems

Seasonal changes in soil organic matter after a decade of nutrient addition in a lowland tropical forest

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