Effect of warming on extracted soil carbon pools of Abies faxoniana forest at two elevations

Xu, Gang; Jiang, Hao; Zhang, Yuanbin; Korpelainen, Helena; Li, Chunyang

doi:10.1016/j.foreco.2013.08.038

Cited by 15 publications

(9 citation statements)

References 69 publications

(92 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present study, experimental warming had a tendency to decrease soil labile C pools at the high altitude. The activities of invertase and proteinase, which break down labile C molecules, increased by warming, which confirmed that the observed increase in the soil CO 2 efflux rate at the high altitude site (see Xu et al, 2013) may be caused by the decomposition of the labile C. The results are in accordance with previous studies (Bradford et al, 2008;Xu et al, 2010b) and support our hypothesis that the decomposition of labile C may be accelerated under soil warming. We also found that Fungi,18:2u6,9c; B/F, the ratio of total bacteria to total fungi PLFAs; G þ /G À , the ratio of total gram-positive bacteria to gram-negative bacteria PLFAs; AMF, arbuscular mycorrhizal fungi; T bacteria , total bacteria PLFAs; and T fungi , total fungi PLFAs.…”

Section: Discussionsupporting

confidence: 92%

“…The OTCs increased the soil temperature by 0.9 ± 0.2 C and 0.9 ± 0.1 C at 3000 and 3500 m, respectively, on average. In comparison with the control plots, the soil gravimetric moisture contents decreased by averages of 4.3% and 1.6% at the 3000 and 3500 m altitudes, respectively (see Xu et al, 2013). The soil pH was 5.6 ± 0.5 and 5.6 ± 0.7 at elevations of 3000 and 3500 m, respectively.…”

Section: Soil Microclimates and Propertiesmentioning

confidence: 93%

See 1 more Smart Citation

Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures

Chen

Berninger

et al. 2015

Soil Biology and Biochemistry

Self Cite

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 92%

Section: Soil Microclimates and Propertiesmentioning

confidence: 93%

Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures

Chen

Berninger

et al. 2015

Soil Biology and Biochemistry

Self Cite

View full text Add to dashboard Cite

“…They found that SOC stored in the rSOC, SC-rSOC and DOC fractions was less sensitive to environmental change than SOC stored in POM and SA. This relative enrichment of more stable fractions is also in line with findings in other studies (Cheng et al, 2011;Xu et al, 2013). Yet, in agreement with Conen et al (2006) and Shaver et al (2006), we found that this was not primarily caused by differences in SOC turnover due to chemical recalcitrance, but by physical destabilization of aggregates and thus a decline and growth of fractions as such, not only of the SOC stored within them.…”

Section: Change In Soc Fraction Distribution After Extreme Soil Warmisupporting

confidence: 93%

“…They found that SOC stored in the rSOC, SC‐rSOC and DOC fractions was less sensitive to environmental change than SOC stored in POM and SA. This relative enrichment of more stable fractions is also in line with findings in other studies (Cheng et al ., ; Xu et al ., ). Yet, in agreement with Conen et al .…”

Section: Discussionmentioning

confidence: 87%

Sensitivity of soil carbon fractions and their specific stabilization mechanisms to extreme soil warming in a subarctic grassland

Poeplau

Kätterer

Leblans

et al. 2016

Global Change Biology

View full text Add to dashboard Cite

Terrestrial carbon cycle feedbacks to global warming are major uncertainties in climate models. For in-depth understanding of changes in soil organic carbon (SOC) after soil warming, long-term responses of SOC stabilization mechanisms such as aggregation, organo-mineral interactions and chemical recalcitrance need to be addressed. This study investigated the effect of 6 years of geothermal soil warming on different SOC fractions in an unmanaged grassland in Iceland. Along an extreme warming gradient of +0 to ~+40 °C, we isolated five fractions of SOC that varied conceptually in turnover rate from active to passive in the following order: particulate organic matter (POM), dissolved organic carbon (DOC), SOC in sand and stable aggregates (SA), SOC in silt and clay (SC-rSOC) and resistant SOC (rSOC). Soil warming of 0.6 °C increased bulk SOC by 22 ± 43% (0-10 cm soil layer) and 27 ± 54% (20-30 cm), while further warming led to exponential SOC depletion of up to 79 ± 14% (0-10 cm) and 74 ± 8% (20-30) in the most warmed plots (~+40 °C). Only the SA fraction was more sensitive than the bulk soil, with 93 ± 6% (0-10 cm) and 86 ± 13% (20-30 cm) SOC losses and the highest relative enrichment in C as an indicator for the degree of decomposition (+1.6 ± 1.5‰ in 0-10 cm and +1.3 ± 0.8‰ in 20-30 cm). The SA fraction mass also declined along the warming gradient, while the SC fraction mass increased. This was explained by deactivation of aggregate-binding mechanisms. There was no difference between the responses of SC-rSOC (slow-cycling) and rSOC (passive) to warming, and C enrichment in rSOC was equal to that in bulk soil. We concluded that the sensitivity of SOC to warming was not a function of age or chemical recalcitrance, but triggered by changes in biophysical stabilization mechanisms, such as aggregation.

show abstract

“…Based on China FLUX data and Q 10 data in public literatures, Zheng et al [2009] found that ecosystems in colder regions have potentially relatively higher Q 10 values. Other studies also provided experimental evidences for the similar results [German et al, 2011;Gershenson et al, 2009;Wang et al, 2013;Whitby and Michael, 2013;Xu et al, 2013]. Taken together, these findings suggest that soils from low native temperatures have a greater potential to release C in response to climate warming.…”

Section: Q 10 Increased In Forest Soils With Increasing Latitudesupporting

confidence: 68%

Soil microbial respiration rate and temperature sensitivity along a north‐south forest transect in eastern China: Patterns and influencing factors

Wang

et al. 2016

JGR Biogeosciences

View full text Add to dashboard Cite

Soil organic matter is one of the most important carbon (C) pools in terrestrial ecosystems, and future warming from climate change will likely alter soil C storage via temperature effects on microbial respiration. In this study, we collected forest soils from eight locations along a 3700 km north-south transect in eastern China (NSTEC). For 8 weeks these soils were incubated under a periodically changing temperature range of 6-30°C while frequently measuring soil microbial respiration rate (Rs; each sample about every 20 min). This experimental design allowed us to investigate Rs and the temperature sensitivity of Rs (Q 10 ) along the NSTEC. Both Rs at 20°C (R 20 ) and Q 10 significantly increased (logarithmically) with increasing latitude along the NSTEC suggesting that the sensitivity of soil microbial respiration to changing temperatures is higher in forest soils from locations with lower temperature. Our findings from an incubation experiment provide support for the hypothesis that temperature sensitivity of soil microbial respiration increases with biochemical recalcitrance (C quality-temperature hypothesis) across forest soils on a large spatial scale. Furthermore, microbial properties primarily controlled the observed patterns of R 20 , whereas both substrate and microbial properties collectively controlled the observed patterns of Q 10 . These findings advance our understanding of the driving factors (microbial versus substrate properties) of R 20 and Q 10 as well as the general relationships between temperature sensitivity of soil microbial respiration and environmental factors.

show abstract

Effect of warming on extracted soil carbon pools of Abies faxoniana forest at two elevations

Cited by 15 publications

References 69 publications

Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures

Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures

Sensitivity of soil carbon fractions and their specific stabilization mechanisms to extreme soil warming in a subarctic grassland

Soil microbial respiration rate and temperature sensitivity along a north‐south forest transect in eastern China: Patterns and influencing factors

Contact Info

Product

Resources

About