Response of soil extracellular enzyme activity to experimental precipitation in a shrub-encroached grassland in Inner Mongolia

Akinyemi, Damilare Stephen; Zhu, Yanhui; Zhao, Mengying; Zhang, Pujin; Shen, Haihua; Fang, Jingyun

doi:10.1016/j.gecco.2020.e01175

Cited by 20 publications

(16 citation statements)

References 62 publications

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“…The potential mechanism for this may be that elevated water availability accelerated plant and root residue incorporation into SOM (Nielsen and Ball, 2015;She et al, 2018) and enhanced the soil C and N pools in the water-limited environment, thus alleviating the microbial C limitation (Deng et al, 2019;Tian et al, 2017). However, water addition also could aggravate C limitation (Akinyemi et al, 2020;Waring et al, 2014;Wang et al, 2015), because the differences in the initial soil environment, rainfall amount and intensity, and dominant community (Hewins et al, 2016;Jing et al, 2020;Nielsen and Ball, 2015). Furthermore, the study found that water addition induced microbial N to P limitation in desert ecosystems (Fig.…”

Section: Microbial Metabolic Limitation Responses To N and Water Addimentioning

confidence: 99%

“…3C). Several mechanisms may explain the highest P limitation being associated with the combination of N addition and increased precipitation: first, long-term N and water addition could have caused continuous plant litter inputs, providing a suitable habitat for microbial growth (Akinyemi et al, 2020;Tian et al, 2017;Yang et al, 2017), hence, enhancing the soil C and N pools (She et al, 2018). Further, N and water additions improved the substrate availability (AN and SAP) (Table 1 and 2), which may have led to changes in soil C availability, plant nutrient status, and soil microbial community structure (Feng et al, 2019;Marklein et al, 2012;Henry et al, 2005).…”

Section: Microbial Metabolic Limitation Responses To N and Water Additionsmentioning

confidence: 99%

“…Water addition would also activate both microbes and plants (Akinyemi et al, 2020;Hewins et al, 2016), leading to competition in P uptake between microbes and plants (Wang et al, 2014;Wang et al, 2015;Wang et al, 2020b). Consequently, N and water additions in combination significantly aggregated microbial P limitation in the soils.…”

Section: Microbial Metabolic Limitation Responses To N and Water Additionsmentioning

confidence: 99%

“…Soil moisture and SAP were strong controlling factors influencing microbial metabolic limitation in the desert shrublands (Table 3). Drought is beneficial to the release of soil P via geochemical weathering (Feng et al, 2019;Wang et al, 2020b;Tapia-Torres et al, 2015;Wang et al, 2015), however, increased water availability promotes the loss of soil P through leaching (Akinyemi et al, 2020), thereby decreasing the soil P availability and thus leading to P limitation. In addition, water may supply more nutrients and stimulate the growth of vegetation and microbial communities, which can aggravate the competition between plants and microbes for soil available P (Ma et al, 2020;Wang et al, 2014).…”

Section: Major Factors Affecting Soil Microbial Metabolic Limitationmentioning

confidence: 99%

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Interactive Effects of Nitrogen and Water Addition on Soil Microbial Metabolic Limitation in Temperate Desert Shrublands

Xie

Zhang

et al. 2021

Preprint

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Aims Soil microbes play critical roles in regulating the turnover of soil organic carbon (SOC) and nutrients, and microbial metabolic limitation should draw more attention in desert ecosystems. However, soil extracellular enzymes activity (EEA) response and microbial metabolic limitation to atmospheric N deposition and increased precipitation in desert-shrubland are still poorly understood. Methods The study examined the effects of long-term (9 year) N and water additions (i.e., 5 g N m−2 yr−1, 30% ambient precipitation increase and their combination) on EEAs and soil microbial resource limitation, as well as explored their controlling factors in the Gurbantunggut Desert in northwestern China. Results The results showed that N and water additions significantly enhanced soil EEAs and considerably aggravated microbial phosphorous (P) limitation. Water addition and the N-water combination addition alleviated carbon (C) limitation, but N addition alone strengthened microbial C limitation. The interaction of N and water additions relieved the negative impact of N addition on soil microbial C limitation, and positively aggravated microbial P limitation. Soil microbial C limitation was primarily driven by soil moisture and organic C concentration, while the soil microbial N/P limitation was chiefly controlled by soil water and available P contents. Conclusions The influences of either N- or water addition alone on desert ecosystem biogeochemical processes may be altered by their concurrent occurrence. Overall, these findings highlight water availability is more effective at modifying microbial metabolisms than N accumulation in desert ecosystems. Altogether, this may help to predict how terrestrial C and nutrient flow could be induced by global change factors..

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Section: Microbial Metabolic Limitation Responses To N and Water Addimentioning

confidence: 99%

Section: Microbial Metabolic Limitation Responses To N and Water Additionsmentioning

confidence: 99%

Section: Microbial Metabolic Limitation Responses To N and Water Additionsmentioning

confidence: 99%

Section: Major Factors Affecting Soil Microbial Metabolic Limitationmentioning

confidence: 99%

See 2 more Smart Citations

Interactive Effects of Nitrogen and Water Addition on Soil Microbial Metabolic Limitation in Temperate Desert Shrublands

Xie

Zhang

et al. 2021

Preprint

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“…Seasonal fluctuations in soil enzymatic activity are reported for several ecosystems such as tropical [6], temperate [7], and alpine forests [8]. Moreover, it is well documented that temperature and precipitation are the main drivers of soil enzymatic activity [9,10].…”

Section: Introductionmentioning

confidence: 99%

Role of Seasonality and Fire in Regulating the Enzymatic Activities in Soils Covered by Different Vegetation in a Mediterranean Area

et al. 2021

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As they quickly respond to environmental conditions, soil enzymes, involved in nutrient cycles, are considered good indicators of soil quality. The Mediterranean area is a peculiar environment for climatic conditions and for fire frequency. Therefore, the research aimed to evaluate the role of seasonality and fire on enzymatic activities (i.e., hydrolase, dehydrogenase, and β-glucosidase) in soils covered by herbs, black locust, pine, and holm oak. In addition, the main soil abiotic properties that drive the enzymatic activities were also investigated. In order to achieve the aims, surface soils were collected in unburnt and burnt areas and characterized for water and organic matter contents, pH, concentrations of C and N, and available fractions of Al, Ca, Cu, Fe, Mg, Mn, Na, and Pb. The results highlighted that the soil enzymatic activities were mainly affected by seasonality more than by fire; in unburnt soils, their main drivers were nutrient availabilities, whereas, in burnt soils they were pH, water and organic matter contents, C and N concentrations, and both nutrient and metal availabilities. Finally, holm oak, as compared with herbs, pine, and black locust, conferred higher stability to soils that were affected by seasonality and fire.

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Effects of mowing, spring precipitation, soil nutrients, and enzymes on grassland productivity

Reinhart

Komatsu

Vermeire

2022

Agrosystems Geosci & Env

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Little research has assessed how the timing and intensity of grazing might affect plant biomass, available nutrients, soil extracellular enzyme activity (EEA), and how climate change might influence these responses. We tested the effect of two spring precipitation schemes (70, 100% of ambient), two mowing intensities (moderate, severe), and two mowing season treatments (June, October) on plant and soil properties. We detected an interactive effect of precipitation, mowing intensity, and mowing season on plant biomass. When plots were mowed at a moderate intensity, water reductions had irregular effects on plant biomass depending on the mowing season. Plant biomass was also 11% greater in plots mowed at moderate than at severe intensities. Most soil nutrients were unaffected by treatments except for calcium. Soil EEA was unaffected by treatments; however, the activity of a phosphorus (P)-acquisition enzyme was more than four times greater than the activity of nitrogen (N)-and carbon-acquisition enzymes. A substantial amount (adjusted R 2 = .51) of plot-to-plot variation in plant biomass was explained by three soil properties especially an N-acquisition enzyme and to a lesser degree by plant available P and soil pH. The grassland had a high degree of natural buffering capacity as most soil properties were resistant to shifts in 6-yr spring precipitation and 5-yr simulated grazing intensity and season. Grassland plant biomass varied by treatments and was seemingly limited by biogeochemical constraints especially the prevalent need to mobilize P and a secondary need to acquire N as plant biomass increased.

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Response of soil extracellular enzyme activity to experimental precipitation in a shrub-encroached grassland in Inner Mongolia

Cited by 20 publications

References 62 publications

Interactive Effects of Nitrogen and Water Addition on Soil Microbial Metabolic Limitation in Temperate Desert Shrublands

Interactive Effects of Nitrogen and Water Addition on Soil Microbial Metabolic Limitation in Temperate Desert Shrublands

Role of Seasonality and Fire in Regulating the Enzymatic Activities in Soils Covered by Different Vegetation in a Mediterranean Area

Effects of mowing, spring precipitation, soil nutrients, and enzymes on grassland productivity

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