No effect of long-term soil warming on diffusive soil inorganic and organic nitrogen fluxes in a temperate forest soil

Heinzle, Jakob; Wanek, Wolfgang; Tian, Ye; Kengdo, Steve Kwatcho; Borken, Werner; Schindlbacher, Andreas; Inselsbacher, Erich

doi:10.1016/j.soilbio.2021.108261

Cited by 14 publications

(15 citation statements)

References 27 publications

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“…Absorptive fine root biomass also increased with warming by 22%. Since there are no indications that soil warming changed soil N availability (Heinzle et al, 2021), we postulate that the increase in FRB and aFRB with soil warming in our study could be linked to the low P and K availability in the warmed plots, as explained by the optimal partitioning theory (Bloom et al, 1985).…”

Section: Effects Of Soil Warming On Fine Root Biomassmentioning

confidence: 63%

Long‐term soil warming alters fine root dynamics and morphology, and their ectomycorrhizal fungal community in a temperate forest soil

Kengdo

Peršoh

Schindlbacher

et al. 2022

Global Change Biology

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Climate warming is predicted to affect temperate forests severely, but the response of fine roots, key to plant nutrition, water uptake, soil carbon, and nutrient cycling is unclear. Understanding how fine roots will respond to increasing temperature is a prerequisite for predicting the functioning of forests in a warmer climate. We studied the response of fine roots and their ectomycorrhizal (EcM) fungal and root‐associated bacterial communities to soil warming by 4°C in a mixed spruce‐beech forest in the Austrian Limestone Alps after 8 and 14 years of soil warming, respectively. Fine root biomass (FRB) and fine root production were 17% and 128% higher in the warmed plots, respectively, after 14 years. The increase in FRB (13%) was not significant after 8 years of treatment, whereas specific root length, specific root area, and root tip density were significantly higher in warmed plots at both sampling occasions. Soil warming did not affect EcM exploration types and diversity, but changed their community composition, with an increase in the relative abundance of Cenoccocum at 0–10 cm soil depth, a drought‐stress‐tolerant genus, and an increase in short‐ and long‐distance exploration types like Sebacina and Boletus at 10–20 cm soil depth. Warming increased the root‐associated bacterial diversity but did not affect their community composition. Soil warming did not affect nutrient concentrations of fine roots, though we found indications of limited soil phosphorus (P) and potassium (K) availability. Our findings suggest that, in the studied ecosystem, global warming could persistently increase soil carbon inputs due to accelerated fine root growth and turnover, and could simultaneously alter fine root morphology and EcM fungal community composition toward improved nutrient foraging.

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Section: Effects Of Soil Warming On Fine Root Biomassmentioning

confidence: 63%

Long‐term soil warming alters fine root dynamics and morphology, and their ectomycorrhizal fungal community in a temperate forest soil

Kengdo

Peršoh

Schindlbacher

et al. 2022

Global Change Biology

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“…Further, according to the SEM analysis, MBN was an additional important source of DON in the natural and embanked S. alterniflora salt marsh (Figure 7). This might be due to DON having the capacity to be released into the soil after microbial death (Isobe et al, 2018;Evangelou et al, 2021;Heinzle et al, 2021).…”

Section: The Organic N Subpool In the Soil Subsystemmentioning

confidence: 99%

“…Nevertheless, the NO − 3 − N concentration increased significantly in spring following embankment development (Figure 3). Thus, we speculated that, (1) nitrification might continue in spring, even when the soil NH + 4 − N concentration was low (Augustine et al, 2014;Schütt et al, 2014;Heinzle et al, 2021); (2) the rapid decrease in NO − 3 − N utilization by plants at the onset of plant growth occurred in spring due to the dramatically decreased plant biomass following the establishment of the embankment (Augustine et al, 2014;Che et al, 2018;Heinzle et al, 2021).…”

Section: The Inorganic N Subpool In the Soil Subsystemmentioning

confidence: 99%

“…In this study, R A in the embanked salt marsh decreased significantly in spring and summer but rapidly increased in autumn (Figure 4). Previous studies have reported that the soil N mineralization rate was determined by microbial activities, which are always highly associated with the temperatures (Augustine et al, 2014;Lozano-Garcıá et al, 2016;Heinzle et al, 2021). For example, higher temperatures can stimulate microbial activities, which directly expedite the soil N turnover rate (Lozano-Garcıá et al, 2016).…”

Section: Microbial N Mineralization and Immobilizationmentioning

confidence: 99%

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Seasonal soil-plant nitrogen dynamics of a cordgrass salt marsh in response to coastal embankments in Eastern China

Qin

Feng

Zhao³

et al. 2022

Front. Mar. Sci.

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The effects of coastal embankments on nitrogen (N) cycling in the Spartina alterniflora salt marsh have been extensively reported. However, it remains unclear effects of the embankment on the sizes of diverse N subpools in the plant-soil subsystems year-round. This study examined seasonal changes in various N subpools of plant subsystems; soil subsystems [e.g., soil organic N (SON), recalcitrant organic N (RON), labile organic N (LON), dissolved organic N (DON), ammonium N(NH+4 N), and nitrate N(NO3-N)]; N mineralization [e.g., soil net ammonification (RA) and nitrification (RN) rate]; and immobilization [e.g., microbial biomass N (MBN)] in embanked and adjacent S. alterniflora natural salt marshes on the coast of Eastern China. The embankment significantly reduced the litter N storage by 62.7–71.8% over the four seasons and decreased the root N storage by 53.0% during winter. The SON, LON, RON, and N H +4 N concentrations declined significantly by 43.0–60.2%, 35.8–64.8%, 44.9–59.0%, and 20.8–42.2%, respectively, over the four seasons following the embankment construction. Furthermore, the embankment dramatically reduced the DON concentrations by 21.9% in spring, 14.6% in summer, and 10.4% in winter, while notably diminishing the NO3 N concentrations by 33.4% in autumn and 44.9% in winter, and the RA and RN in spring and summer. However, the embankment clearly increased the MBN concentrations during summer and autumn, the NO3 N concentrations in spring, and the RA and RN in winter at different levels. Due to the decreased soil N inputs from plants, the embankment decreased the organic and inorganic N subpools every season to varying degrees, except for the NO3 N concentration in spring. We suggest that the decreased soil salinity following embankment establishment might increase the uptake of ions by microbes, while stimulating the production of MBN. Ultimately, the NO3 N and DON were two vital N sources for S. alterniflora, and plants absorbed N from the soil to promote their biomass, as well as N concentration and storage. This study is conducive toward understanding the mechanisms behind the effects of coastal embankments on the N transfer among various N subpools in the plant and soil systems.

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“…Since traditional soil nitrogen studies have relied on aqueous extractions, there is an ongoing debate about how microdialysis relates to these measurements. It is generally accepted that conventional extraction methods can modify nitrogen pools in a soil sample by destroying soil structures such as fine roots and hyphae [84], mineralizing organic nitrogen and increasing the proportion of inorganic nitrogen, especially NH 4 + [85]. In contrast, microdialysis techniques have relatively little disturbance to the soil and thus minimize these inaccuracies in the nitrogen samples taken.…”

Section: Future Perspectivesmentioning

confidence: 99%

The Participation of Microbiota in the Transformation of Nitrogen Compounds in the Soil—A Review

2021

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Due to the growing costs of agricultural production and the need to protect the environment, there has been a need to intensify activities leading to an increase in the effectiveness of natural biological processes. These measures should increase the biodiversity of the environment, enable the adaptation of microorganisms and the protection of plants and soils against the background of the concept of sustainable agricultural development. The soil is an important environment in which many elements are transformed, including nitrogen necessary for the proper yielding of plants. The aim of the article is to present the microbiological aspect of nitrogen transformation, starting with a review of historical findings and then to discuss the progress of the latest developments that have contributed to a detailed understanding of the biochemical reactions occurring during nitrogen transformation in soil. Moreover, the aim of the study is to present the current state of knowledge on the dynamics of nitrogen uptake and conversion by various species of microorganisms and the relationship between the activity of nitrogen microorganisms and nitrogen uptake by plants. The article also includes the latest information on the possibility of using microbiological biostimulants supporting plant growth (PGPR) and protection against the effects of phytopathogens.

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No effect of long-term soil warming on diffusive soil inorganic and organic nitrogen fluxes in a temperate forest soil

Cited by 14 publications

References 27 publications

Long‐term soil warming alters fine root dynamics and morphology, and their ectomycorrhizal fungal community in a temperate forest soil

Long‐term soil warming alters fine root dynamics and morphology, and their ectomycorrhizal fungal community in a temperate forest soil

Seasonal soil-plant nitrogen dynamics of a cordgrass salt marsh in response to coastal embankments in Eastern China

The Participation of Microbiota in the Transformation of Nitrogen Compounds in the Soil—A Review

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