Dissolved organic carbon concentrations under conditions of different forestcomposition

Remes, M.; Kulhavý, J.

doi:10.17221/16/2009-jfs

Cited by 8 publications

(3 citation statements)

References 18 publications

(10 reference statements)

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“…A difference in the movement of matter between both forest categories is consistent with conclusions of other authors (e.g. Remeš, Kulhavý 2009). The contrast is reflected in the distribution of soil features in the respective ordination space (Figs.…”

Section: Soil Featuressupporting

confidence: 93%

Differences in top-soil features between beech-mixture and Norway spruce forests of the Šumava Mts.

Matějka¹,

Starý²

2009

J. For. Sci.

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Top-soil samples were taken from four mountain forest ecosystems in the Bohemian Forest to compare the processes in European beech-mixture (fs) and Norway spruce (Pa) dominating ecosystems. Selected plots can be grouped into two types of forest ecosystems which are conditioned by position on the natural altitudinal gradient. Several chemical features (content of organic matter, properties of humic and fulvic acids, releasable P, Ca, Mg, Fe and Al content) were compared with the species structure of oribatid mite communities in the same samples. Strict differences between both ecosystem types were discovered. Statistically significant differences were detected in Mg content (0.42 mg/g in fs ecosystems compared to 0.30 mg/g in Pa ecosystems) and in organic matter quality (the ratio of carbon content in humic acids to carbon content in total humus acids was 0.53 in fs ecosystems and 0.66 in Pa ecosystems) and quantity (e.g. content of humic acid carbon was 59 and 86 mg/g in fs and Pa ecosystems, respectively). Different dynamics of organic matter decomposition and nutrient movement lead to some opposite correlations among the soil chemical features: correlation between total ash and soluble ash (r = +0.96 and -0.86 in the fs and Pa ecosystems, respectively) and total ash -P content correlation (r = +0.76 and -0.92 in the fs and Pa ecosystems, respectively) can be mentioned as examples. The oribatid mite communities are markedly distinct in both ecosystem types, although parameters of species diversity and abundance are similar. Different correlations were revealed between the parameters of mite community structure (e.g. species diversity and total mite abundance) and top-soil chemical features. The correlation structure is different in both ecosystem types. It indicates differences in leading variables determining the oribatid community structure in the beech mixture ecosystem or in the Norway spruce one.

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Section: Soil Featuressupporting

confidence: 93%

Differences in top-soil features between beech-mixture and Norway spruce forests of the Šumava Mts.

Matějka¹,

Starý²

2009

J. For. Sci.

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“…The pH of lysimetric waters under O and A horizons was significantly lower in the stand with an admixture of pine. The effect of the soil pH decrease can be a reduction of soil biological activity and an increase of mobility of some components, such as soil organic matter, iron and aluminium (Wesselink, Mulder 1995;De Witt et al 1999;Anderson et al 2000;Augusto et al 2002;You et al 2006;Remeš, Kulhavý 2009).…”

Section: Discussionmentioning

confidence: 99%

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

Jończak¹,

Parzych²

2012

J. For. Sci.

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ABSTRACT: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 3 -N) and ammonium nitrogen (NH 4 -N) from organic and humic horizons of Dystric Arenosols was studied in northern Poland in [2008][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 4 -N and NO 3 -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 4 -N and NO 3 -N as well as fluxes of the components (calculated in mg·kg -1 DM·year -1 and mg·m -2 ·year -1 ) were observed in mixed stand.

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“…DOC plays a signifi cant role in carbon fl ux in ecosystems (Remeš and Kulhavý, 2009;Fujii et al, 2011). During the last 20 years, a widespread increase of the amount of DOC in surface waters has been reported in Europe and North America (Skjelkvale, 2003).…”

mentioning

confidence: 99%

Comparison of extractable soil carbon and dissolved organic carbon by their molecular characteristics

Šestauberová¹,

Novák²

2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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The aim of this study was to compare the molecular characteristics of extractable soil carbon from biotopes of the Rašeliník watershed and dissolved organic carbon (DOC) from Rašeliník creek, by using the 0.1M pyrophosphate, 0.01M CaCl2 and Britton-Robinson buffer as extraction agents. The molecular weight Mr and weight-average molecular weight Mw, determined by the low pressure size exclusion chromatography, increased in the following sequence: humic substances (HS) in CaCl2 < aquatic HS < HS in sodium pyrophosphate ≤ HS in a buffer. Elution curves of all humic substances were characteristic by two peaks with predominant low-molecular fraction. Mr and Mw values of aquatic humic substances were 5.9 and 7.9 kDa, respectively, and proportion of this low-molecular fraction reached 97%. This corresponds to the fact, that the main fraction of HS in surface waters constitute fulvic acids. Using soil extraction in CaCl2 we obtained the fraction of organic carbon similar to the humic substances contain in DOC. Differences in quantity of humic substances extracted from soils among CaCl2 (mean 0.42 ± 0.39), Britton-Robinson buffer (34.9 ± 11.2) and sodium pyrophosphate (293.2 ± 113.4) were statistically significant. The A465/A665 ratio negatively correlated with molecular weight of humic substances.

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Dissolved organic carbon concentrations under conditions of different forestcomposition

Cited by 8 publications

References 18 publications

Differences in top-soil features between beech-mixture and Norway spruce forests of the Šumava Mts.

Differences in top-soil features between beech-mixture and Norway spruce forests of the Šumava Mts.

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

Comparison of extractable soil carbon and dissolved organic carbon by their molecular characteristics

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