Dissolved organic carbon (DOC) input to the soil: DOC fluxes and their partitions during the growing season in a cool‐temperate broad‐leaved deciduous forest, central Japan

Chen, Siyu; Yoshitake, Shinpei; Iimura, Yasuo; Asai, Chiyuki; Ohtsuka, Toshiyuki

doi:10.1007/s11284-017-1488-6

Cited by 26 publications

(24 citation statements)

References 61 publications

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“…Mean throughfall DOC and TDN concentrations (Table ) were in the range (7–45 mg L −1 for DOC; 0.5–4 mg L −1 TDN) of those of previous studies in natural forests (Chen et al, ; Hu, Wang, & Sun, ; Pelster et al, ; Van Stan et al, ). The DOC and TDN enrichment through stemflow to the swamp floor relative to either incident precipitation or throughfall (Table ; Figure ) demonstrates the clear importance of this hydrological process in the preferential transfer of nutrients to discrete areas (near the tree stems).…”

Section: Discussionsupporting

confidence: 59%

“…This rainfall partitioning has the capacity to affect ecosystem processes by creating hotspots of increased soil moisture and infiltration (Carlyle‐Moses, ; Cayuela, Llorens, Sánchez‐Costa, Levia, & Latron, ; Spencer & van Meerveld, ). Additionally, as precipitation comes into contact with vegetation surfaces (leaves and bark), the water leaches organic carbon, nitrogen, and other solutes from these surfaces, greatly increasing the solute flux to the ecosystem floor relative to the incident precipitation (Chen, Yoshitake, Timura, Asai, & Ohtsuka, ; Hofhansi et al, ). This enrichment of nutrients and other elements influences rates of soil ecosystem processing (Zhou et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Rainfall partitioning through a mixed cedar swamp and associated C and N fluxes in Southern Ontario, Canada

Duval

2019

Hydrological Processes

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Partitioning of rainfall through a forest canopy into throughfall, stemflow, and canopy interception is a critical process in the water cycle, and the contact of precipitation with vegetated surfaces leads to increased delivery of solutes to the forest floor. This study investigates the rainfall partitioning over a growing season through a temperate, riparian, mixed coniferous-deciduous cedar swamp, an ecosystem not well studied with respect to this process. Seasonal throughfall, stemflow, and interception were 69.2%, 1.5%, and 29.3% of recorded above-canopy precipitation, respectively.Event throughfall ranged from a low of 31.5 ± 6.8% for a small 0.8-mm event to a high of 82.9 ± 2.4% for a large 42.7-mm event. Rain fluxes of at least 8 mm were needed to generate stemflow from all instrumented trees. Most trees had funnelling ratios <1.0, with an exponential decrease in funnelling ratio with increasing tree size.Despite this, stand-scale funnelling ratios averaged 2.81 ± 1.73, indicating equivalent depth of water delivered across the swamp floor by stemflow was greater than incident precipitation. Throughfall dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) averaged 26.60 ± 2.96 and 2.02 ± 0.16 mg L −1 , respectively, which were~11 and three times above-canopy rain levels. Stemflow DOC averaged 73.33 ± 7.43 mg L −1 , 35 times higher than precipitation, and TDN was 4.45 ± 0.56 mg L −1 , 7.5 times higher than rain. Stemflow DOC concentration was highest from Populus balsamifera and TDN greatest from Thuja occidentalis trees.Although total below-canopy flux of TDN increased with increasing event size, DOC flux was greatest for events 20-30 mm, suggesting a canopy storage threshold of DOC was readily diluted. In addition to documenting rainfall partitioning in a novel ecosystem, this study demonstrates the excess carbon and nitrogen delivered to riparian swamps, suggesting the assimilative capacity of these zones may be underestimated.

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Section: Discussionsupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Rainfall partitioning through a mixed cedar swamp and associated C and N fluxes in Southern Ontario, Canada

Duval

2019

Hydrological Processes

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“…Although downward leaching of dissolved OC (DOC) from forest floors could increase the MSOC content (Chen et al, ; Richter et al, ; Sanderman & Amundson, ), there was no significant difference in the DOC concentration and flux between conifers and hardwood sites in a synthesis study for temperate forests (Michalzik et al, ). A similar MSOC content, even with a relatively high DOC flux to mineral soils in European tree species (Vesterdal et al, ), suggests that the distinction between MSOC content under different tree species is not due to DOC from forest floors.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Tree Species on Soil Organic Carbon Content in South Korea

Cha

2019

JGR Biogeosciences

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The effects of tree species on soil organic carbon (SOC) content have been evaluated in many studies, but only with a relatively small number of sample plots, resulting in ambiguous conclusions. Here we used a total of 595 forest plots in South Korea to investigate the role of four grouped tree species—pines, oaks, other conifers, and other deciduous trees—in the forest SOC content in both forest floors and mineral soils. Significant differences were observed in SOC content among the groups. Pines contained 7.12 Mg C/ha of organic carbon in forest floors, whereas oaks and other deciduous trees contained 5.39 and 5.41 Mg C/ha, respectively. In contrast, oaks and other deciduous trees contained ~66 Mg C/ha of organic carbon each in mineral soils (0‐ to 30‐cm depth), whereas pines contained 49.50 Mg C/ha. The total SOC content including both forest floors and mineral soils was the largest under oaks and the smallest under other coniferous trees, due to SOC being approximately an order of magnitude higher in mineral soils than in forest floors. The effects of tree species on SOC storage became apparent for the forest stands with >20‐year‐old trees, which suggests that the observed differences in the SOC content are likely due to the current stands rather than remnants of previous stands. The decomposition rates of organic materials could be a controlling factor affecting SOC storage, rather than inputs of photosynthesized products to soils.

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“…O conteúdo de MO na atmosfera também pode influenciar o enriquecimento de COD na precipitação após o atravessamento pelas copas vegetais, a partir do acúmulo de compostos orgânicos de origem atmosférica sobre estas. Ao atravessar as copas, a precipitação lava a biomassa a cada evento de chuva, resultando em aumento na concentração de COD (Costa et al, 2016;Chen et al, 2017;Howard et al, 2018). O conteúdo de COD de origem atmosférica depositado sobre a biomassa e lixiviado pela chuva representa a deposição seca.…”

Section: Fluxo De Atravessamento: a Lavagem Da Biomassa Vivaunclassified

Dinâmica de Carbono Orgânico Dissolvido em Ecossistemas Florestais: Uma Revisão Sobre a Lixiviação pela Chuva (Dissolved Organic Carbon Dynamics in Forest Ecosystems Through Rainfall Mediated Leaching: A Review )

Miranda

Avelar

2019

Rev. Bras. Geog. Fis.

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O fluxo de matéria orgânica é um componente importante da dinâmica de ecossistemas e dos impactos ambientais. A água da chuva, ao percolar os ambientes terrestres, transporta partículas orgânicas das quais as menores têm maior mobilidade espacial e são mais ativas do ponto de vista ecológico, sendo chamadas de dissolvidas quando menores que 0,45 µm na maioria dos estudos recentes. A dinâmica de carbono orgânico dissolvido (COD) inclui entradas atmosféricas de moléculas alóctones, tanto pela deposição úmida vinculada à chegada direta via chuva e que pode ser observada pela concentração de COD na precipitação inicial, quanto pela deposição seca originada pela lavagem da biomassa viva onde se acumulam poeiras orgânicas de origem atmosférica, a qual pode ser observada na precipitação atravessada. Nesta segunda, também há a presença de COD originado por exsudatos solúveis secretados pela própria vegetação. Nas deposições úmida e seca, é mais relevante a condição atmosférica vinculada à influência de atividades industriais e centros urbanos, do que a produtividade dos ecossistemas em si. Ao percolar e lixiviar os estoques de serrapilheira a água da chuva atinge as maiores concentrações de COD, onde a dinâmica de produtividade e decomposição de cada ecossistema torna-se preponderante. Quando infiltra o horizonte mineral do solo o COD pode adsorver-se às partículas minerais, reduzindo sua concentração na solução do solo gradativamente com o aumento da profundidade. Quando ocorrem escoamentos superficiais, ficam reduzidas as oportunidades de adsorção do COD ao solo, resultando em aumento das transferências dos ecossistemas terrestres para os aquáticos. A B S T R A C TThe flows of organic matter are an important part of the ecosystem dynamics and environmental impacts. Rainwater, when percolating through terrestrial environments, transports organic particles, of which the smallest ones have greater spatial mobility and are more ecologically active. These particles are considered dissolved when smaller than 0.45 μm in most recent studies. The dynamics of dissolved organic carbon (DOC) involves the atmospheric input of allochthonous molecules, due to the wet deposition associated with rainfall, which can be observed in the DOC concentration in the initial precipitation, as well as by the dry deposition caused by the washing of living biomass where organic dust of atmospheric origin accumulates, which can be observed in the throughfall fluxes. In the later, there is also the presence of DOC originated by soluble exudates secreted by the vegetation itself. About wet and dry depositions, the atmospheric condition associated with the influence of industrial activities and urban centers is more relevant than the productivity of the ecosystems themselves. When percolating and leaching the litter stocks, rainwater reaches the highest concentrations of DOC, where the dynamics of productivity and decomposition of each ecosystem becomes preponderant. When it infiltrates the soil mineral horizon the DOC can adsorb to the mineral particles, reducing its concentration in the soil solution gradually as the depth increases. With the occurrence of surface runoff, opportunities for adsorption of DOC to the soil are reduced, resulting in increased transfer from terrestrial to aquatic ecosystems.Key-words: Dissolved organic carbon; forest leaching; geoecology

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Dissolved organic carbon (DOC) input to the soil: DOC fluxes and their partitions during the growing season in a cool‐temperate broad‐leaved deciduous forest, central Japan

Cited by 26 publications

References 61 publications

Rainfall partitioning through a mixed cedar swamp and associated C and N fluxes in Southern Ontario, Canada

Rainfall partitioning through a mixed cedar swamp and associated C and N fluxes in Southern Ontario, Canada

The Effects of Tree Species on Soil Organic Carbon Content in South Korea

Dinâmica de Carbono Orgânico Dissolvido em Ecossistemas Florestais: Uma Revisão Sobre a Lixiviação pela Chuva (Dissolved Organic Carbon Dynamics in Forest Ecosystems Through Rainfall Mediated Leaching: A Review )

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