Winter–spring transition induces changes in nutrients and microbial biomass in mid-alpine forest soils

Freppaz, Michèle; Said-Pullicino, Daniel; Filippa, Gianluca; Curtaz, Fabienne; Celi, Luisella; Zanini, Ermanno

doi:10.1016/j.soilbio.2014.07.010

Cited by 11 publications

(6 citation statements)

References 21 publications

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“…This inconsistency in the response of Q 10 to N addition might reflect the distinct sensitivity of microbial respiration and root respiration to N. Since the winter R s is predominantly composed of microbial respiration which is more susceptible to availability of N than root respiration, the R s during the winter is likely to be affected by the manipulation in soil N 43 . Furthermore, the different direction of the Q 10 response to low and high N addition treatments during the winter might suggest a potential change in metabolic pathways 44 or microbial composition 19 in soil; however, the specific explanations for different response of Q 10 to different quantity of N addition between seasons still remain unclear.…”

Section: Discussionmentioning

confidence: 99%

“…However, in these cold biomes, seasonal snow cover is one of the most important variables controlling processes of forest ecosystem C cycle 18 . Changes in durations and depth of snowpack would lead to large differences in soil temperature, moisture, accompanied changed microbial activities 19 and root activities 20 21 . Snow cover provides an insulated layer, providing a stable environment for cold resistant microorganisms 22 and the continual microbial activities might lead to winter soil respiration 17 .…”

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confidence: 99%

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Annual soil CO2 efflux in a cold temperate forest in northeastern China: effects of winter snowpack and artificial nitrogen deposition

Liu

Mou

Yan

et al. 2016

Sci Rep

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We conducted a snow depth 0 cm (non-snowpack), 10 cm, 20 cm, 30 cm and natural depth) gradient experiment under four quantities of nitrogen addition (control, no added N; low-N, 5 g N m−2 yr−1; medium-N, 10 g N m−2 yr−1; and high-N, 15 g N m−2 yr−1) and took an-entire-year measurements of soil respiration (Rs) in Korean pine forests in northeastern China during 2013–2014. No evidence for effects of N on Rs could be found during the growing season. On the other hand, reduction of snowpack decreased winter soil respiration due to accompanied relatively lower soil temperature. We found that winter temperature sensitivities (Q10) of Rs were significantly higher than the growing season Q10 under all the N addition treatments. Moderate quantities of N addition (low-N and medium-N) significantly increased temperature sensitivities (Q10) of Rs, but excessive (high-N) addition decreased it during winter. The Gamma empirical model predicted that winter Rs under the four N addition treatments contributed 4.8. ± 0.3% (control), 3.6 ± 0.6% (low-N), 4.3 ± 0.4% (medium-N) and 6.4 ± 0.5% (high-N) to the whole year Rs. Our results demonstrate that N deposition will alter Q10 of winter Rs. Moreover, winter Rs may contribute very few to annual Rs budget.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Annual soil CO2 efflux in a cold temperate forest in northeastern China: effects of winter snowpack and artificial nitrogen deposition

Liu

Mou

Yan

et al. 2016

Sci Rep

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“…The seasonal soil microbial biomass is strongly affected by humidity, temperature, soil physicochemical properties, and other environmental factors (Classen et al 2007;Freppaz et al 2014). In the current study of the artificial K. fortunei var.…”

Section: Seasonal Variation and Influence Factors Of Soil Microbial Bmentioning

confidence: 99%

Seasonal dynamics of soil microbial biomass C and N of Keteleeria fortunei var. cyclolepis forests with different ages

Yong¹,

Liu²,

Chen³

et al. 2019

J. For. Res.

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decreased in the 10-20 cm and 20-40 cm soil layers, and MBN increased firstly and then decreased in all three soil layers. As the soil depth increased, both MBC and MBN gradually decreased for all three forests. The MBC and MBN basically had the same seasonal variation in all three soil layers of all three forests, i.e., high in the summer and low in the winter. Correlation analysis showed that MBC was significantly positively correlated with soil organic matter, total nitrogen, and soil moisture, whereas MBN was significantly positively correlated with soil total nitrogen. It showed that soil moisture content was the main factor determining the variation of soil microbial biomass by Redundancy analysis. The results showed that the soil properties changed continuously as the young forest grew into the middle-aged forest, which increased soil microbial biomass and enriched the soil nutrients. However, the soil microbial biomass declined as the middle-age forest continued to grow, and the soil nutrients were reduced in the mature forest.

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“…Previous studies have identified the relationships between seasonal changes in SMB contents and environmental factors (Puissant et al 2015;Sorensen et al 2018). In particular, previous studies have found that SMB contents in temperate and tropical regions were influenced by climate conditions (Freppaz et al 2014;Wang et al 2015;Salazar, Sulman, and Dukes 2018;Ren et al 2017) or that the temporal variations in SMB were influenced by the soil temperature and variation in moisture (Wardle 1992(Wardle , 1998Salazar, Sulman, and Dukes 2018). However, few studies have investigated the relationship between the temporal variation in the SMB contents and environmental factors in high-altitude regions.…”

Section: Introductionmentioning

confidence: 99%

Change in soil microbial biomass and regulating factors in an alpine meadow site on the Qinghai-Tibetan Plateau

2019

Soil Science and Plant Nutrition

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The change in soil microbial biomass (SMB) content and its direct links to soil organic matter (SOM) and environmental factors are not well understood for high-elevation regions. Therefore, this research investigated the temporal variation of SMB and its relationship with SOM and environmental factors in an alpine meadow site on the Qinghai-Tibetan Plateau. The soil organic carbon (SOC) and total nitrogen (TN) contents in alpine meadows showed monthly and seasonal variations and were higher in colder months, and the soil C/N ratio was higher in winter and in autumn than it was in the other seasons (P < 0.05). In addition, the changes in the SMB C and SMB N contents were notable at monthly and seasonal scales, whereas the SMB C and SMB N contents were higher in the winter and spring than they were in the other seasons (P < 0.05); the ratio of SMB C/SOC was higher in spring than it was in the other seasons; the ratio of the SMB N/TN content was higher in cold or cool months than it was in the other months; and the ratio of the SMB C/SMB N was highest in August (P < 0.05). Moreover, the SMB C and SMB N contents were significantly positively correlated to the SOC and TN contents (P < 0.01), and the SMB content was also significantly positively correlated to soil water content and air temperature (P < 0.05), or to soil bulk density and soil pH (P < 0.05). The results suggested that the change in the SMB in the alpine meadows was highly regulated by the SOC and TN and by monthly and seasonal changes in the soil bulk density, the soil pH, soil moisture, and air temperatures.

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Winter–spring transition induces changes in nutrients and microbial biomass in mid-alpine forest soils

Cited by 11 publications

References 21 publications

Annual soil CO2 efflux in a cold temperate forest in northeastern China: effects of winter snowpack and artificial nitrogen deposition

Annual soil CO2 efflux in a cold temperate forest in northeastern China: effects of winter snowpack and artificial nitrogen deposition

Seasonal dynamics of soil microbial biomass C and N of Keteleeria fortunei var. cyclolepis forests with different ages

Change in soil microbial biomass and regulating factors in an alpine meadow site on the Qinghai-Tibetan Plateau

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