Pools and fluxes of carbon in three Norway spruce ecosystems along a climatic gradient in Sweden

Kleja, Dan Berggren; Svensson, Magnus; Majdi, Hooshang; Jansson, Per‐Erik; Langvall, Ola; Bergkvist, Bo; Johansson, Maj‐Britt; Weslien, Per; Truus, L.; Lindroth, Anders; Ågren, Göran I.

doi:10.1007/s10533-008-9179-6

Cited by 25 publications

(32 citation statements)

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“…Needle litter inputs estimated from inventory data were on average 51% of total litter inputs estimated from 14 C data. As a comparison, root and understory vegetation contributed to about 40% of the litter input to the O horizon in three intensively monitored spruce stands at different sites in Sweden (Kleja et al 2008). With understory vegetation and root litter inputs taken into account, litterfall estimated by the two different methods are both similar in magnitude and show similar geographical patterns.…”

Section: Discussionmentioning

confidence: 95%

“…The trend with increasing SOC stocks with latitude across Scandinavia has in some previous studies been interpreted as an effect of a gradient in climate (Liski & Westman 1997;Callesen et al 2003). It has however been suggested recently that the gradient in SOC is mainly related to a gradient in N deposition (Kleja et al 2008), as N deposition has the dual effect of both increasing litter inputs and increasing MRT. This explanation is plausible, as it has been shown experimentally that biomass production in the types of forests found in Scandinavia are mainly limited by N and to a lesser degree by temperature (Jarvis & Linder 2000).…”

Section: Discussionmentioning

confidence: 98%

“…Differences in climate have been suggested as a likely mechanism by some authors (Liski & Westman, 1997;Callesen et al 2003), while others have proposed that the differences in SOC stocks are mainly due to a gradient in N deposition (Kleja et al 2008). The size of the SOC stock is determined by both the rate of litter input and by how long the carbon stays in the soil, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Mean residence time of O horizon carbon along a climatic gradient in Scandinavia estimated by 14C measurements of archived soils

et al. 2010

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Mean residence time of O horizon carbon along a climatic gradient in Scandinavia estimated by 14C measurements of archived soils

et al. 2010

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“…Zech and Guggenberger (1996) estimated the proportion of dissolved organic carbon (DOC) in the total C input into the mineral soil in an acid forest soil in the Fichtelgebirge, Germany, to be as high as 75 %. In a more recent study of C fluxes in Swedish boreal forests this estimate was lower, ranging from 26 % in the south to 10-15 % in the north (Kleja et al, 2008). Moreover, structural similarities between dissolved organic matter (DOM) and solid-phase organic matter from the Spodosol mineral B horizon suggests that DOM is a significant source of C in spodic B horizons .…”

Section: Introductionmentioning

confidence: 96%

The impact of four decades of annual nitrogen addition on dissolved organic matter in a boreal forest soil

2013

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Addition of mineral nitrogen (N) can alter the concentration and quality of dissolved organic matter (DOM) in forest soils. The aim of this study was to assess the effect of long-term mineral N addition on soil solution concentration of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) in Stråsan experimental forest (Norway spruce) in central Sweden. N was added yearly at two levels of intensity and duration: the N1 treatment represented a lower intensity but a longer duration (43 yr) of N addition than the shorter N2 treatment (24 yr). N additions were terminated in the N2 treatment in 1991. The N treatments began in 1967 when the spruce stands were 9 yr old. Soil solution in the forest floor O, and soil mineral B, horizons were sampled during the growing seasons of 1995 and 2009. Tension and non-tension lysimeters were installed in the O horizon (n = 6), and tension lysimeters were installed in the underlying B horizon (n = 4): soil solution was sampled at two-week intervals. Although tree growth and O horizon carbon (C) and N stock increased in treatments N1 and N2, the concentration of DOC in O horizon leachates was similar in both N treatments and control. This suggests an inhibitory direct effect of N addition on O horizon DOC. Elevated DON and nitrate in O horizon leachates in the ongoing N1 treatment indicated a move towards N saturation. In B horizon leachates, the N1 treatment approximately doubled leachate concentrations of DOC and DON. DON returned to control levels, but DOC remained elevated in B horizon leachates in N2 plots nineteen years after termination of N addition. We propose three possible explanations for the increased DOC in mineral soil: (i) the result of decomposition of a larger amount of root litter, either directly producing DOC or (ii) indirectly via priming of old SOM, and/or (iii) a suppression of extracellular oxidative enzymes

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“…and Berg and Meentemeyer (2002) supposed that N-rich litter should have a larger resistant fraction left than N-poor litter resulting in a significantly higher accumulation of humus under Norway spruce stands. Similarly, Kleja et al (2008) found that higher N deposition and N availability under spruce along a climatic gradient in Sweden resulted in the slower turnover of soil organic matter in the south than in the north. Michel and Matzner (2002) also supported a hypothesis that long-term high N deposition would lead to increased accumulation of C in forest floor.…”

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confidence: 89%

Norway spruce litterfall and forest floor in the IUFRO thinning experiment CZ 13 - Vítkov

Novák¹,

Slodičák²,

Dušek³

et al. 2013

J. For. Sci.

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ABSTRACT:The effect of thinning on litterfall and decomposition of biomass was investigated in Norway spruce IUFRO thinning experiment (CZ-13), Czech Republic. The experiment was established in 1971 in an 8-year-old spruce stand on former farmland. Quantity and quality of litterfall and biomass from humus horizons were analysed in two treatments (1C -no thinning, 2T -heavy thinning at the young age). Under thinned stand, a lower amount of dry mass was observed compared to the control. Although mean total annual litterfall was the same in both treatments (5.3 Mg·ha -1 ), the observed trend indicates a possible effect of thinning on the higher rate of decomposition. With the exception of calcium (2002-2005 samples) we found the forest floor lower in nutrients and litterfall higher in nutrients in thinned plot compared to the control. Our results supported the theory that early thinning is an appropriate silvicultural strategy helping spruce to cope with growth conditions on sites naturally dominated by broadleaves.

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Pools and fluxes of carbon in three Norway spruce ecosystems along a climatic gradient in Sweden

Cited by 25 publications

References 0 publications

Mean residence time of O horizon carbon along a climatic gradient in Scandinavia estimated by 14C measurements of archived soils

Mean residence time of O horizon carbon along a climatic gradient in Scandinavia estimated by 14C measurements of archived soils

The impact of four decades of annual nitrogen addition on dissolved organic matter in a boreal forest soil

Norway spruce litterfall and forest floor in the IUFRO thinning experiment CZ 13 - Vítkov

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