In situ soil respiration at reclaimed and unreclaimed post-mining sites: Responses to temperature and reclamation treatment

Bujalský, Luděk; Kaneda, Satoshi; Dvorščík, Petr; Frouz, Jan

doi:10.1016/j.ecoleng.2014.03.048

Cited by 29 publications

(16 citation statements)

References 30 publications

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“…Positive relationships between CO 2 flux from the soil and soil CO 2 concentration are more likely in patches with higher root biomass and higher levels of CO 2 concentration and flux. This is consistent with findings that the proportion of total soil respiration represented by root respiration is generally higher in soil locations with higher overall respiration, as indicated by a world-wide data set 6 and by our previous study at the same sites used in the current research 20 . The latter study showed that patches with a higher root biomass are more sensitive to temperature, which may further increase the average respiration at sites with substantial levels of root respiration.…”

Section: Discussionsupporting

confidence: 93%

“…We also expect that negative relationships will be more common in spots where soil respiration is dominated by microbes rather than by roots. To test these hypotheses, we used field sites that are known to have a large variation in the contributions of microbes and roots to the overall respiration but whose other parameters are very similar 20 – 25 . We also conducted laboratory experiments with soil from the same field sites and with one of the sub-dominant plant species to test the hypothesis that microbes but not roots are likely to increase the CO 2 concentration to the level that reduces their own respiration (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Flow of CO2 from soil may not correspond with CO2 concentration in soil

Frouz

Bujalský

2018

Sci Rep

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The relationship between CO2 flow from soil and soil CO2 concentration was investigated at 72 permanent sampling points at two forested post-mining sites in the northwest of the Czechia. Based on the entire data set (72 points sampled monthly during the growing season), CO2 flow from the soil was positively correlated with soil CO2 concentration. CO2 concentration in deeper soil layers was positively correlated with root biomass and negatively correlated with soil microbial respiration. In individual sampling points relationship between CO2 flow and soil CO2 concentration varied from being significantly positive (30% of points) to significantly negative (7%) but mostly being non-significant (63%). The positive correlation occurred at points with high root biomass in deeper soil layers, while the negative correlation occurred at points with high soil microbial respiration per cm3 of soil. Laboratory experiments showed that the CO2 produced by microbial respiration can reduce microbial respiration but that CO2 produced by root respiration did not reduce root respiration. The results indicate that when soil ventilation is poor, microbial respiration can sufficiently increase soil CO2 concentration so as to reduce microbial respiration, which greatly increases the variability in the relationship between CO2 flow from soil and soil CO2 concentration.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Flow of CO2 from soil may not correspond with CO2 concentration in soil

Frouz

Bujalský

2018

Sci Rep

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“…This indicates that the increase in temperature (from 15 • C to 25 • C) significantly improved the microbial activity and the rate of substrate utilization, which contributed to SBR. The temperature sensitivity of soil respiration depends on the activity of the SOC, namely, the supply capacity of substrates [62][63][64]. In the present study, the temperature sensitivity (Q 10 ) decreased with the reclamation age.…”

Section: Discussionmentioning

confidence: 58%

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Yu-le

et al. 2017

Sustainability

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Soil organic carbon (SOC) plays an essential role in the early stages of pedogenisis and ecological restoration in reclaimed mine soils. Dynamic changes in the SOC content are essential for assessing the quality of reclaimed mine soils and the effect of ecological restoration. To objectively assess the carbon dynamics of reclaimed soils, we selected the surface (0-20 cm) soil of farmland under agricultural use (soybean-wheat rotation) from a reclamation chronosequence (R4: 4 years of reclamation, R7: 7 years of reclamation, R10: 10 years of reclamation and R13: 13 years of reclamation) in the Dongtan Mining Area, Shandong Province, China. The adjacent normal, unaffected farmland was used as a control (CK). The results showed that the SOC content gradually increased with the reclamation age until it reached 7.98 g·kg −1 for R13, which accounted for 76% of that of the CK. However, the total carbon contents of the reclaimed soils did not significantly differ from and even appeared higher than that of the CK. This is mainly because the inorganic carbon contents of the reclaimed soils ranged from 2.98 to 12.61 g·kg −1 , all of which were significantly higher than the 0.87 g·kg −1 obtained for the CK. The microbial biomass carbon (MBC) content and the microbial quotient significantly increased with the reclamation age of the soil, and both parameters were markedly higher for R13 than for the CK. The dissolved organic carbon (DOC) content and its ratio to the SOC were significantly higher for R4-R13 than for the CK and DOC/SOC gradually decreased with the reclamation age. Both the reclamation age and the temperature had positive effects on the soil basal respiration (SBR). The SBR rate constantly increased with the reclamation age and was markedly higher at 25 • C than at 15 • C. The temperature sensitivity (Q 10 ) of the SBR showed a clearly decreasing trend for the reclamation chronosequence, but its value remained higher for R13 than for the CK (2.37). The metabolic quotient constantly decreased with the reclamation age, which suggests that the survival pressure imposed on soil microbes by the soil environment gradually decreased. These results indicate that it takes a long time for organic carbon to accumulate in reclaimed mine soil and that rational agricultural use contributes to sustained improvement of the quality of reclaimed soil.

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“…Large amount of overburden spoil material overlying coal layers is excavated and deposited in spoil heaps. The spoil material typically has very low biological activity (Bujalský, Kaneda, Dvorščík, & Frouz, ; Frouz et al, ; Helingerová, Frouz, & Šantrůčková, ; Kuráž, ). Ecosystem recovery in post‐mining sites is affected by substrate quality and terrain topography (Bradshaw, ; Frouz, Kalčík, & Velichová, ; Martínez‐Ruiz & Marrs, ) .…”

Section: Introductionmentioning

confidence: 99%

Water regime of reclaimed and unreclaimed post‐mining sites

et al. 2017

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Water regime, throughfall, stemflow, soil water storage, subsurface runoff, and meteorological parameters were studied during 2 years (2011–2012) in 2 reclaimed and 2 unreclaimed post‐mining sites near Sokolov (Czech Republic). All sites were 25–35 years old, covered by woody vegetation, and developed on the same overburden consisting of tertiary clays. Interception of water by vegetation was about one third of precipitation in both reclaimed and unreclaimed sites; stemflow also did not differ significantly between sites and represented less than 10% of interception. Both reclaimed and unreclaimed sites have stable amount of soil water in the soil profile independent of precipitation, but water storage in reclaimed sites was significantly higher. The results suggest that after 25–35 years, there is no major difference in water budget of reclaimed and unreclaimed sites that develop by unassisted natural succession.

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In situ soil respiration at reclaimed and unreclaimed post-mining sites: Responses to temperature and reclamation treatment

Cited by 29 publications

References 30 publications

Flow of CO2 from soil may not correspond with CO2 concentration in soil

Flow of CO2 from soil may not correspond with CO2 concentration in soil

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Water regime of reclaimed and unreclaimed post‐mining sites

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