Soil C:N:P dynamics during secondary succession following fire in the boreal forest of central Canada

Hume, Alexandra M.; Chen, Han Y. H.; Taylor, Anthony R.; Kayahara, Gordon J.; Man, Rongzhou

doi:10.1016/j.foreco.2016.03.033

Cited by 86 publications

(68 citation statements)

References 62 publications

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“…Soil nitrogen concentration positively correlated to soil organic carbon concentration (Wen et al, 2014), and thereby the soil nitrogen stocks to some degree shared similar patterns of soil OC stocks under the same circumstances. As Hume et al (2016) discussed, the accumulation of soil nitrogen may be slower than carbon because nitrogen is progressively locked up in live biomass, which is likely the explanation for why the soil nitrogen stock changed less significantly with stand ages and between different stand types compared with soil OC stocks here.…”

Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 76%

“…Most similar research that focuses on the changes in organic carbon stocks along the chronosequence has suggested that soil organic carbon stocks in topsoil reach a stable level after approximately 20 years (Tremblay et al, 2006;Chen et al, 2013). This can be interpreted as the formation of a balance that depends on the carbon input and organic decomposition (Hume et al, 2016). In the initial stage of afforestation, the changes in organic carbon storage differed with increasing stand age.…”

Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 99%

“…The soil nitrogen stock increases with increasing stand age in the upper soil layer because of cumulative biological fixation, litterfall, recycling from deeper mineral soil via root mortality and even atmospheric N deposition (Hume et al, 2016). However, the changes in soil organic carbon and nitrogen stocks at different stand ages are rarely quantified and poorly understood, and this is especially true in the context of comparing pairwise mixed forests with pure forest stands along the chronosequence.…”

Section: Introductionmentioning

confidence: 99%

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Accumulation of soil organic C and N in planted forests fostered by tree species mixture

2017

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Abstract. With the increasing trend of converting monocultures into mixed forests, more and more studies have been carried out to investigate the admixing effects on tree growth and aboveground carbon storage. However, few studies have considered the impact of mixed forests on belowground carbon sequestration, particularly changes in soil carbon and nitrogen stocks as a forest grows. In this study, paired pure Pinus massoniana plantations, Cinnamomum camphora plantations and mixed Pinus massoniana-Cinnamomum camphora plantations at ages of 10, 24 and 45 years were selected to test whether the mixed plantations sequestrate more organic carbon (OC) and nitrogen (N) in soils and whether this admixing effect becomes more pronounced with stand ages. The results showed that tree species identification, composition and stand age significantly affected soil OC and N stocks. The soil OC and N stocks were the highest in mixed Pinus-Cinnamomum stands compared to those in counterpart monocultures with the same age in the whole soil profile or specific soil depth layers (0-10, 10-20 and 20-30 cm) for most cases, followed by Cinnamomum stands and Pinus stands with the lowest. These positive admixing effects were mostly nonadditive. Along the chronosequence, the soil OC stock peaked in the 24-year-old stand and was maintained as relatively stable thereafter. The admixing effects were also the highest at this stage. However, in the topsoil layer, the admixing effects increased with stand ages in terms of soil OC stocks. When comparing mixed Pinus-Cinnamomum plantations with corresponding monocultures within the same age, the soil N stock in mixed stands was 8.30, 11.17 and 31.45 % higher than the predicted mean value estimated from counterpart pure species plantations in 10-, 24-and 45-year-old stands, respectively. This suggests that these admixing effects were more pronounced along the chronosequence.

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Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 76%

Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Accumulation of soil organic C and N in planted forests fostered by tree species mixture

2017

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“…At the high density end of the RG, post-fire legacies are likely buffered from extreme conditions on the surrounding burn mosaic by other survivors. These buffered habitats may provide favorable conditions for continued survival through plant-soil interactions (e.g., nitrogen availability [66]). Dense neighborhoods may also provide additional opportunities for increased diversity through seed dispersal by wind or animals [67] at local, within-neighborhood scales.…”

Section: Discussionmentioning

confidence: 99%

Characterizing Spatial Neighborhoods of Refugia Following Large Fires in Northern New Mexico USA

Haire¹,

Miller

2017

Land

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Abstract:The spatial patterns resulting from large fires include refugial habitats that support surviving legacies and promote ecosystem recovery. To better understand the diverse ecological functions of refugia on burn mosaics, we used remotely sensed data to quantify neighborhood patterns of areas relatively unchanged following the 2011 Las Conchas fire. Spatial patterns of refugia measured within 10-ha moving windows varied across a gradient from areas of high density, clustered in space, to sparsely populated neighborhoods that occurred in the background matrix. The scaling of these patterns was related to the underlying structure of topography measured by slope, aspect and potential soil wetness, and spatially varying climate. Using a nonmetric multidimensional scaling analysis of species cover data collected post-Las Conchas, we found that trees and forest associates were present across the refugial gradient, but communities also exhibited a range of species compositions and potential functions. Spatial patterns of refugia quantified for three previous burns (La Mesa 1977, Dome 1996, Cerro Grande 2000 were dynamic between fire events, but most refugia persisted through at least two fires. Efforts to maintain burn heterogeneity and its ecological functions can begin with identifying where refugia are likely to occur, using terrain-based microclimate models, burn severity models and available field data.

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“…A high C/P indicates the assimilation of microbes to available P in soil, and this phenomenon is prone to happen with microbes and crops to competitively absorb the available P in soil. Therefore, the high C/P indicates great potential for P fixation in soil [19]. In conclusion, the contents of C, N, and P and their relationships in the bioretention system determine soil nutrient variations and indicate the effectiveness of purifying urban stormwater runoff by the soil media.…”

Section: Introductionmentioning

confidence: 94%

Temporal and Spatial Variations in Soil TOC, TN, and TP, and their Relationships in Bioretention Tanks

Guo

et al. 2018

Pol. J. Environ. Stud.

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This study aims to explore the temporal and spatial variations of soil total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), and the relationships between C/N, C/P and TOC, TN, and TP in bioretention tanks. Two bioretention tanks (tank No. 1: depth of 0~20 cm was vacant aquifer layer, 20~90cm, filled with planting soil, 90~105 cm, filled with gravel; tank No. 3: 0~20 cm was aquifer layer, 20~50 cm, filled with planting soil, 50~90 cm, filled with blast furnace slag and sand; 90~105cm, filled with gravel) were used in simulation stormwater runoff purification experiments to collect planting soil samples at intervals of one hour before inflow and 24 hours after the end of inflow. The results revealed that soil TN, TP, and TOC in 2 bioretention tanks were mainly concentrated at 10~30 cm in soil. The contents of TN and TP varied from 0.32 g kg -1 to 0.50 g kg -1 and from 0.83 g kg -1 to 1.35 g kg -1 within the investigated zone, respectively. Soil TN content in the 2 bioretention tanks before the inflow was slightly greater than after the inflow, but the opposite was true for TP, as it was less before the inflow than after. The potential of TN and TP fixation in No. 1 was higher than that in No, 3 within the upper 30 cm depth, which were related to the infiltration rate of underlying fillers (the underlying fillers of No. 1 is planting soil, and which is the blast furnace slag and sand in No. 3). The TOC content in the 2 bioretention tanks varied from 4.24 g kg -1 to 8.97 g kg -1, and the average contents decreased with the increasing depths. The C/N and C/P were positively correlated with TOC, while they were negatively correlated with TN and TP contents, which showed that soil C/N and C/P were mainly controlled by TOC in soil. The conclusions can provide references for the design and operation evaluation of bioretention facilities.

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Soil C:N:P dynamics during secondary succession following fire in the boreal forest of central Canada

Cited by 86 publications

References 62 publications

Accumulation of soil organic C and N in planted forests fostered by tree species mixture

Accumulation of soil organic C and N in planted forests fostered by tree species mixture

Characterizing Spatial Neighborhoods of Refugia Following Large Fires in Northern New Mexico USA

Temporal and Spatial Variations in Soil TOC, TN, and TP, and their Relationships in Bioretention Tanks

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