Fluxes of dissolved organic carbon in three tropical secondary forests developed on serpentine and mudstone

Fujii, Kazumichi; Hartono, Arief; Funakawa, Shinya; Uemura, Mari; Kosaki, Takashi

doi:10.1016/j.geoderma.2011.04.012

Cited by 44 publications

(24 citation statements)

References 47 publications

(75 reference statements)

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“…Adsorption of DOM to Fe and Al oxides/hydroxides and soil clay in the soil profile would likely be primarily responsible for this phenomenon. This explanation was consistent with the result in the present study that soil DOC content decreased gradually with increasing soil depth, and found also in tropical secondary forests (Fujii et al, 2011). The acidic clay soil in this study (of which soil minerals have been intensively weathered due to its distribution in subtropical and tropical regions of high temperature and humidity) had high contents of clay and Fe and Al oxides/hydroxides.…”

Section: The Difference Of Leaching Between Doc and Donsupporting

confidence: 93%

“…The roles of DOM leaching in soil C and N cycles of agricultural ecosystems vary depending on soil type and vegetation (Fujii et al, 2011). Soil properties such as ionic strength and pH of the water phase influence organic matter solubility, whereas ferric and aluminum oxides/hydroxides and clay minerals determine the sorption/desorption equilibrium between the dissolved phase and the solid phase of SOM (Chantigny, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal and inter-annual variation of leaching of dissolved organic carbon and nitrogen under long-term manure application in an acidic clay soil in subtropical China

Long

Jiang

Sun

2015

Soil and Tillage Research

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Section: The Difference Of Leaching Between Doc and Donsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Seasonal and inter-annual variation of leaching of dissolved organic carbon and nitrogen under long-term manure application in an acidic clay soil in subtropical China

Long

Jiang

Sun

2015

Soil and Tillage Research

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“…4) to only about 2000-2200 mm yr −1 at the other two locations in the central and southern part of Amazonia (see Table 5). Similar throughfall flux has also been reported for tropical rainforest in Indonesia (12.6 to 16.4 g C m −2 yr −1 , Fujii et al, 2011) as well as for primary, sub-tropical rainforests in Puerto Rico (13.2 g C m −2 yr −1 , Heartsill-Scalley et al, 2007) and Taiwan (18.9 g C m −2 yr −1 Liu and Sheu, 2003). …”

Section: Doc In Precipitation and Throughfallsupporting

confidence: 81%

ORCHILEAK (revision 3875): a new model branch to simulate carbon transfers along the terrestrial–aquatic continuum of the Amazon basin

et al. 2017

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Abstract. Lateral transfer of carbon (C) from terrestrial ecosystems into the inland water network is an important component of the global C cycle, which sustains a large aquatic CO 2 evasion flux fuelled by the decomposition of allochthonous C inputs. Globally, estimates of the total C exports through the terrestrial-aquatic interface range from 1.5 to 2.7 Pg C yr −1 (Cole et al., 2007;Battin et al., 2009;Tranvik et al., 2009), i.e. of the order of 2-5 % of the terrestrial NPP. Earth system models (ESMs) of the climate system ignore these lateral transfers of C, and thus likely overestimate the terrestrial C sink.In this study, we present the implementation of fluvial transport of dissolved organic carbon (DOC) and CO 2 into ORCHIDEE (Organising Carbon and Hydrology in Dynamic Ecosystems), the land surface scheme of the Institut PierreSimon Laplace ESM. This new model branch, called OR-CHILEAK, represents DOC production from canopy and soils, DOC and CO 2 leaching from soils to streams, DOC decomposition, and CO 2 evasion to the atmosphere during its lateral transport in rivers, as well as exchange with the soil carbon and litter stocks on floodplains and in swamps. We parameterized and validated ORCHILEAK for the Amazon basin, the world's largest river system with regard to discharge and one of the most productive ecosystems in the world.With ORCHILEAK, we are able to reproduce observed terrestrial and aquatic fluxes of DOC and CO 2 in the Amazon basin, both in terms of mean values and seasonality. In addition, we are able to resolve the spatio-temporal variability in C fluxes along the canopy-soil-water continuum at high resolution (1 • , daily) and to quantify the different terrestrial contributions to the aquatic C fluxes. We simulate that more than two-thirds of the Amazon's fluvial DOC export are contributed by the decomposition of submerged litter. Throughfall DOC fluxes from canopy to ground are about as high as the total DOC inputs to inland waters. The latter, however, are mainly sustained by litter decomposition. Decomposition of DOC and submerged plant litter contributes slightly more than half of the CO 2 evasion from the water surface, while the remainder is contributed by soil respiration. Total CO 2 evasion from the water surface equals about 5 % of the terrestrial NPP. Our results highlight that ORCHILEAK is well suited to simulate carbon transfers along the terrestrialaquatic continuum of tropical forests. It also opens the perspective that provided parameterization, calibration and validation is performed for other biomes, the new model branch could improve the quantification of the global terrestrial C sink and help better constrain carbon cycle-climate feedbacks in future projections.

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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 three tropical secondary forests developed on serpentine and mudstone

Cited by 44 publications

References 47 publications

Seasonal and inter-annual variation of leaching of dissolved organic carbon and nitrogen under long-term manure application in an acidic clay soil in subtropical China

Seasonal and inter-annual variation of leaching of dissolved organic carbon and nitrogen under long-term manure application in an acidic clay soil in subtropical China

ORCHILEAK (revision 3875): a new model branch to simulate carbon transfers along the terrestrial–aquatic continuum of the Amazon basin

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

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