Modelling the effects of climate factors on soil respiration across Mediterranean ecosystems

González-Ubierna, Sergio; Lai, Roberto

doi:10.1016/j.jaridenv.2019.02.008

Cited by 26 publications

(18 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, some other studies (e.g., [32]) have reported that while soil CO 2 efflux of mountain systems increased with temperature, soil water content had no effects due to the relatively low soil temperature. In the present study, the lack of a significant relationship between soil respiration and soil water content was attributed to the observed values of soil water content, which was rarely under the considered limiting values [21,23]. The Q 10 values calculated were all above the median of 2.1 from a global survey of soil respiration carried out by [33], except for lentil heterotrophic soil respiration.…”

Section: Relationships Between Soil Co 2 Efflux and Soil Temperature contrasting

confidence: 59%

“…Three of these were used to measure the total soil respiration, and three were isolated from roots using a polyvinyl chloride cylinder (diameter, 40 cm; height, 40 cm; open at both ends), to measure heterotrophic soil respiration following the method described by [20]. This method, known as 'trenching', has been widely applied to similar studies (e.g., [13,20,21]), with the aim of estimating the root contributions to total soil respiration by physically excluding any root access to the isolated area, regardless of root biomass. The collars were placed at about 10 m from each other in a homogenous area within each field.…”

Section: Study Areamentioning

confidence: 99%

“…Despite the large and growing number of studies that have dealt with the soil C cycle, some major uncertainties and contrasting data have emerged from the literature (e.g., [13,21,27]). While…”

Section: Seasonal Cumulative Total Respiration and Heterotrophic Respmentioning

confidence: 99%

See 2 more Smart Citations

Seasonal Soil Respiration Dynamics and Carbon-Stock Variations in Mountain Permanent Grasslands Compared to Arable Lands

et al. 2019

Self Cite

View full text Add to dashboard Cite

Permanent grasslands provide a wide array of ecosystem services. Despite this, few studies have investigated grassland carbon (C) dynamics, and especially those related to the effects of land-use changes. This study aimed to determine whether the land-use change from permanent grassland to arable lands resulted in variations in the soil C stock, and whether such variations were due to increased soil respiration or to management practices. To address this, seasonal variations of soil respiration, sensitivity of soil respiration to soil temperature (Q10), and soil C stock variations generated by land-use changes were analyzed in a temperate mountain area of central Italy. The comparisons were performed for a permanent grassland and two adjacent fields, one cultivated with lentil and the other with emmer, during the 2015 crop year. Soil respiration and its heterotrophic component showed different spatial and temporal dynamics. Annual cumulative soil respiration rates were 6.05, 5.05 and 3.99 t C ha−1 year−1 for grassland, lentil and emmer, respectively. Both soil respiration and heterotrophic soil respiration were positively correlated with soil temperature at 10 cm depth. Derived Q10 values were from 2.23 to 6.05 for soil respiration, and from 1.82 to 4.06 for heterotrophic respiration. Soil C stock at over 0.2 m in depth was 93.56, 48.74 and 46.80 t C ha−1 for grassland, lentil and emmer, respectively. The land-use changes from permanent grassland to arable land lead to depletion in terms of the soil C stock due to water soil erosion. A more general evaluation appears necessary to determine the multiple effects of this land-use change at the landscape scale.

show abstract

Section: Relationships Between Soil Co 2 Efflux and Soil Temperature contrasting

confidence: 59%

Section: Study Areamentioning

confidence: 99%

See 1 more Smart Citation

Seasonal Soil Respiration Dynamics and Carbon-Stock Variations in Mountain Permanent Grasslands Compared to Arable Lands

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, as was found in our study, the SR rate can be better explained using bivariate regression which includes SWC at the monthly scale. Furthermore, some studies have suggested that the relationship between soil respiration and soil temperature varies according to moisture thresholds [26,27], thus when the data from July to October 2013 were excluded, due to the limited soil water, the best-fit bivariate models further enhanced the explanatory value of the variation of the monthly SR rate (Figure 4). The apparent temperature sensitivity (Q 10 ) of the soil respiration has been shown to be widely variable among different ecosystems [11,14,16].…”

Section: Effect Of the St And The Swc On The Monthly Sr Ratementioning

confidence: 99%

Effects of Soil Temperature, Water Content, Species, and Fertilization on Soil Respiration in Bamboo Forest in Subtropical China

Zhang

Qian

Zhuang

2020

Forests

View full text Add to dashboard Cite

Understanding the change pattern of soil respiration (SR) and its drivers under different bamboo species and land management practices is critical for predicting soil CO2 emission and evaluating the carbon budget of bamboo forest ecosystems. A 24-month field study was performed in subtropical China to monitor SR in experimental plots of local bamboo (Phyllostachys glauca) without fertilization (PG) and commercial bamboo (Phyllostachys praecox) with and without fertilization (PPF and PP, respectively). The SR rate and soil properties were measured on a monthly timescale. Results showed that the SR rate ranged from 0.38 to 8.53 µmol CO2 m−2s−1, peaking in June. The PPF treatment had higher SR rates than the PP and PG treatments for most months; however, there were no significant differences among the treatments. The soil temperature (ST) in the surface layer (0–10 cm) was found to be the predominant factor controlling the temporal change pattern of the monthly SR rate in the PG and PP treatments (i.e., those without fertilization). A bivariate model is used to show that a natural factor—comprised of ST and soil water content (SWC)—explained 44.2% of the variation in the monthly SR rate, whereas biological (i.e., bamboo type) and management (i.e., fertilization) factors had a much smaller impact (less than 0.1% of the variation). The annual mean SR showed a significant positive correlation with soil organic matter (SOM; r = 0.51, P < 0.05), total nitrogen (TN; r = 0.47, P < 0.05), total phosphorus (TP; r = 0.60, P < 0.01), clay content (0.72, P < 0.05) and below-ground biomass (r = 0.60*), which altogether explain 69.0% of the variation in the annual SR. Our results indicate that the fertilization effect was not significant in SR rate for most months among the treatments, but was significant in the annual rate. These results may help to improve policy decisions concerning carbon sequestration and the management of bamboo forests in China.

show abstract

“…This means that the microbial respiration was increased by higher organic C inputs to the soil from crop residue management in the grass-covered vineyard. On the other hand, soil respiration and microbial activity are strongly influenced by soil water content [39]. Therefore, in the present study, lower rates of basal and cumulative respiration in the cereal field as compared to others may be explained by dry land farming and lower water content.…”

Section: Discussionmentioning

confidence: 48%

Soil Biological Fertility and Bacterial Community Response to Land Use Intensity: A Case Study in the Mediterranean Area

et al. 2019

View full text Add to dashboard Cite

The current study was performed to investigate the effects of three different long-term land use intensities on adjacent soil plots, namely a winter wheat field, a grass-covered vineyard, and a cherry farm, on soil biochemical, microbial, and molecular parameters. The results showed the maximum content of soil organic matter (SOM) and microbial biomass carbon (MBC) observed in the grass-covered vineyard. Basal respiration (BSR) and the cumulated respiration (CSR) after 25 days of incubation were significantly higher in the grass-covered vineyard and cherry farm, respectively (BSR 11.84 mg CO2–C kg−1 soil d−1, CSR 226.90 mg CO2–C kg−1 soil). Grass-covered vineyard showed the highest soil biological fertility index (BFI) score (20) and ranked in the class IV (good) of soil biological fertility. Cereal field and cherry farm had lower BFI scores and the corresponding BFI class was III (medium). In addition, the maximum ribosomal RNA copy number and the highest abundance of oligotrophic bacterial groups (25.52% Actinobacteria, 3.45% Firmicutes, and 1.38% Acidobacteria) were observed in the grass-covered vineyard. In conclusion, the grass-covered vineyard is a more conservative system and could have a large potential to improve total carbon storage in soil, mainly because of the cover crop residue management and the low soil perturbation through the no-tillage system.

show abstract

Modelling the effects of climate factors on soil respiration across Mediterranean ecosystems

Cited by 26 publications

References 70 publications

Seasonal Soil Respiration Dynamics and Carbon-Stock Variations in Mountain Permanent Grasslands Compared to Arable Lands

Seasonal Soil Respiration Dynamics and Carbon-Stock Variations in Mountain Permanent Grasslands Compared to Arable Lands

Effects of Soil Temperature, Water Content, Species, and Fertilization on Soil Respiration in Bamboo Forest in Subtropical China

Soil Biological Fertility and Bacterial Community Response to Land Use Intensity: A Case Study in the Mediterranean Area

Contact Info

Product

Resources

About