Track topics on Twitter Track topics that are important to you
Thinning plays a major role in forest soil carbon cycling. However, the mechanisms governing soil C fluxes, i.e., C input through litterfall and fine root (FR) production and C output through soil heterotrophic respiration (R), remain unclear. To fill this gap, we quantified the C fluxes in the topsoil layer (0-20 cm) by measuring litterfall, FR production and total soil respiration (R) (R (autotrophic respiration) and R) at three thinning intensities (control; low-intensity thinning: extraction of 30% of individual trees; high-intensity thinning (HIT): extraction of 70% of individual trees) in a 26-year-old Chinese fir plantation in southern China. In the control plots, the total C input (110 g C m year) via litterfall (59 g C m year) and FR production (51 g C m year) was much lower than the C output via R (518 g C m year). This finding demonstrated that the soil is a C source (407 g C m year). Furthermore, the C source increased with increasing thinning intensity, particularly under HIT, due to the decreased litterfall return and increased soil CO emissions through R; this increase occurred despite the increased C input from FR production. In addition, the C output via R significantly increased by 42% under HIT due to the stimulation of R and R. Consequently, thinning reduced the topsoil C pool by 7-8%. Redundancy analysis indicated that the soil C fluxes following thinning were driven by increased FR mortality, understory plant biomass and diversity, and microbial biomass carbon (MBC). Overall, our results indicate that heavy thinning increases soil C loss by increasing soil CO emissions and decreasing litterfall return, even under substantially increased FR production. This finding suggests that thinning practices should consider the trade-off between soil C inputs and outputs to reduce the impact of thinning on forest soil carbon sequestration.
This article was published in the following journal.
Name: The Science of the total environment
Iron oxidation and reduction have important effects on soil organic carbon conversion in paddy soil during flooding and dry conditions. This study selected two paddy soil samples, one from the city of...
Thinning is an important plantation management strategy. Phosphorus (P) is one of the limiting nutrients in forest ecosystems. The impacts of thinning on soil P remain unclear. In this study, we inves...
Soil stores approximately twice as much carbon as the atmosphere and fluctuations in the size of the soil carbon pool directly influence climate conditions. We used the Nutrient Network global change ...
The growth and survival of plants in semiarid Mediterranean forests can be improved through the benefits conferred by thinning, a forest management practice that removes trees and reduces the competit...
Keeping in view the expanding environmental pollution and irrigation water deficit, a pot experiment was performed for the upland (Huyou2, Hanyou737) and paddy rice cultivars (Taigeng8; Yixiang2292), ...
RATIONALE: Diagnostic procedures, such as positron emission tomography using carbon-11 acetate, may help find metastases from prostate cancer and may help predict whether prostate cancer w...
The investigators wish to investigate neurobiological effects of serotonin 2A receptor modulation in healthy volunteers, contrasting effects of an agonist (psilocybin) and an antagonist (k...
Given the numerous physical and psychological benefits of engaging in regular physical activity (Biddle & Ekkekakis, 2005; Warburton et al., 2007) and the decrease in students' physical ac...
The purpose of this study is to better understand a new type of radiology test called positron emission tomography (PET) with carbon 11 methionine to determine which patients have a benefi...
NUTRAFOL® is a novel nutraceutical supplement, scientifically formulated to specifically target the multiple underlying causes of hair loss and thinning in women. It does not contain horm...
An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.
Unsaturated derivatives of the ESTRANES with methyl groups at carbon-13, with no carbon at carbon-10, and with no more than one carbon at carbon-17. They must contain one or more double bonds.
Inflammation of the vagina due to thinning of the vaginal wall and decreased lubrication associated with reduced estrogen levels at MENOPAUSE.
A family of gram-negative, aerobic bacteria utilizing only one-carbon organic compounds and isolated from in soil and water.
Substances which pollute the soil. Use for soil pollutants in general or for which there is no specific heading.