Dissolved organic carbon from European beech logs: Patterns of input to and retention by surface soil

Ecoscience ◽  
2012 ◽  
Vol 19 (4) ◽  
pp. 364-373 ◽  
Author(s):  
Tiemo Kahl ◽  
Martina Mund ◽  
Jürgen Bauhus ◽  
Ernst-Detlef Schulze
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Surface Soil ◽  
European Beech

scholarly journals Leaching of Colloidal Matter and Dissolved Organic Carbon from Surface Soil Columns during Multiple Irrigation Periods.

2002 ◽  
pp. 61-76
Author(s):  
Masaharu MOTOSHITA ◽  
Toshiko KOMATSU ◽  
Satoshi GESHO ◽  
Per MOLDRUP ◽  
Noriatsu OZAKI ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Surface Soil ◽  
Soil Columns ◽  
Colloidal Matter

scholarly journals Hydrologically transported dissolved organic carbon influences soil respiration in a tropical rainforest

2016 ◽  
Author(s):  
W.-J. Zhou ◽  
H.-Z. Lu ◽  
L.-Q. Sha ◽  
Y.-P. Zhang ◽  
D. A. Schaefer ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Respiration ◽  
Dissolved Organic Carbon ◽  
Soil Temperature ◽  
Soil Water ◽  
Tropical Rainforest ◽  
Surface Soil ◽  
Hydrological Processes ◽  
Doc Flux ◽  
Litter Leachate

Abstract. To better understand the role of the dissolved organic carbon (DOC) transported by hydrological processes in soil respiration in tropical rainforests, we measured: (1) the DOC flux in rainfall, throughfall, litter leachate, and surface soil water (0–20 cm), (2) the seasonality of δ13CDOC in each hydrological process, and δ13C in leaves, litter, and surface soil, and (3) soil respiration in a tropical rainforest in Xishuangbanna, southwest China. The results showed: the surface soil intercepted 94.4 ± 1.2 % of the annual litter leachate DOC flux and is a sink for DOC. The throughfall and litter leachate DOC fluxes amounted to 6.81 % and 7.23 % of the net ecosystem exchange, respectively, indicating that the DOC flux through hydrological processes is a key component of the carbon budget, and may be a key link between hydrological processes and soil respiration in the tropical rainforest. The difference in δ13C among the soil, soil water (at 0–20 cm), throughfall, and litter leachate indicated that DOC is transformed in the surface soil. The variability in soil respiration is more dependent on the hydrologically transported DOC flux than on the soil water content (at 0–20 cm), and is more sensitive to the soil water DOC flux (at 0–20 cm) than to the soil temperature, which suggests that soil respiration is more sensitive to the DOC flux in hydrological processes, especially the soil water DOC flux, than to soil temperature or soil moisture.

scholarly journals Hydrologically transported dissolved organic carbon influences soil respiration in a tropical rainforest

2016 ◽  
Vol 13 (19) ◽  
pp. 5487-5497 ◽  
Author(s):  
Wen-Jun Zhou ◽  
Hua-Zheng Lu ◽  
Yi-Ping Zhang ◽  
Li-Qing Sha ◽  
Douglas Allen Schaefer ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Respiration ◽  
Dissolved Organic Carbon ◽  
Soil Temperature ◽  
Soil Water ◽  
Tropical Rainforest ◽  
Surface Soil ◽  
Hydrological Processes ◽  
Doc Flux ◽  
Litter Leachate

Abstract. To better understand the effect of dissolved organic carbon (DOC) transported by hydrological processes (rainfall, throughfall, litter leachate, and surface soil water; 0–20 cm) on soil respiration in tropical rainforests, we detected the DOC flux in rainfall, throughfall, litter leachate, and surface soil water (0–20 cm), compared the seasonality of δ13CDOC in each hydrological process, and δ13C in leaves, litter, and surface soil, and analysed the throughfall, litter leachate, and surface soil water (0–20 cm) effect on soil respiration in a tropical rainforest in Xishuangbanna, south-west China. Results showed that the surface soil intercepted 94.4 ± 1.2 % of the annual litter leachate DOC flux and is a sink for DOC. The throughfall and litter leachate DOC fluxes amounted to 6.81 and 7.23 % of the net ecosystem exchange respectively, indicating that the DOC flux through hydrological processes is an important component of the carbon budget, and may be an important link between hydrological processes and soil respiration in a tropical rainforest. Even the variability in soil respiration is more dependent on the hydrologically transported water than DOC flux insignificantly, soil temperature, and soil-water content (at 0–20 cm). The difference in δ13C between the soil, soil water (at 0–20 cm), throughfall, and litter leachate indicated that DOC is transformed in the surface soil and decreased the sensitivity indices of soil respiration of DOC flux to water flux, which suggests that soil respiration is more sensitive to the DOC flux in hydrological processes, especially the soil-water DOC flux, than to soil temperature or soil moisture.

scholarly journals Impact of Scots pine admixture in European beech stand on dissolved organic carbon and nitrogen leaching from organic and humic horizons of Dystric Arenosols in Northern Poland

2012 ◽  
Vol 58 (No. 6) ◽  
pp. 278-286 ◽  
Author(s):  
J. Jonczak ◽  
A. Parzych
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Scots Pine ◽  
Organic Nitrogen ◽  
European Beech ◽  
Ammonium Nitrogen ◽  
Mixed Stand ◽  
Carbon And Nitrogen ◽  
Northern Poland ◽  
Beech Stand

The effect of Scots pine admixture in European beech stand on the leaching of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), nitrate nitrogen (NO<sub>3</sub>-N) and ammonium nitrogen (NH<sub>4</sub>-N) from organic and humic horizons of Dystric Arenosols was studied in northern Poland in 2008&ndash;2009. Three zero-tension lysimeters under organic and humic horizons were installed in pure beech and mixed pine-beech stands. Water samples were collected after each rainfall, measured volumetrically, filtered and analysed. In each sample pH and concentrations of DOC, DON, NH<sub>4</sub>-N and NO<sub>3</sub>-N were analysed. Stronger acidification of leachates was observed in mixed stand compared to pure beech. About twice higher concentration of DOC and its fluxes per unit area were determined in mixed stand. The fluxes of DOC from unit mass of soil were less varied. In general, lower concentrations of DON, NH<sub>4</sub>-N and NO<sub>3</sub>-N as well as fluxes of the components (calculated in mg&middot;kg<sup>-1</sup>DM&middot;year<sup>&ndash;1</sup> and mg&middot;m<sup>&ndash;2</sup>&middot;year<sup>&ndash;1</sup>) were observed in mixed stand. &nbsp;

CHARACTERISATION OF DISSOLVED ORGANIC CARBON (DOC) LEACHED FROM LEAVES IN WATER

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Markus Heryanto Langsa
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Total Organic Carbon ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry ◽  
Pinus Radiate

<p>Penelitian ini bertujuan untuk menentukan senyawa organik khususnya organic karbon terlarut (DOC) dari dua spesies daun tumbuhan (<em>wandoo eucalyptus </em>and <em>pinus radiate, conifer</em>) yang larut dalam air selama periode 5 bulan leaching eksperimen. Kecepatan melarutnya senyawa organic ditentukan secara kuantitatif dan kualitatif menggunakan kombinasi dari beberapa teknik diantaranya Total Organic Carbon (TOC) analyser, Ultraviolet-Visible (UV-VIS) spektrokopi dan pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS).</p><p>Hasil analisis DOC dan UV menunjukkan peningkatan yang tajam dari kelarutan senyawa organic di awal periode pengamatan yang selanjutnya berkurang seiring dengan waktu secara eksponensial. Jumlah relatif senyawa organic yang terlarut tergantung pada luas permukaan, aktifitas mikrobiologi dan jenis sampel tumbuhan (segar atau kering) yang digunakan. Fluktuasi profil DOC dan UV<sub>254</sub> disebabkan oleh aktifitas mikrobiologi. Diperoleh bahwa daun kering lebih mudah terdegradasi menghasilkan senyawa organic dalam air dibandingkan dengan daun segar. Hasil pyrolysis secara umum menunjukkan bahwa senyawa hidrokarbon aromatic dan fenol (dan turunannya) lebih banyak ditemukan pada residue sampel setelah proses leaching kemungkinan karena adanya senyawa lignin atau aktifitas humifikasi mikrobiologi membuktikan bahwa senyawa-senyawa tersebut merupakan komponen penting dalam proses karakterisasi DOC.</p>

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