Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability?

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Standard

Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability? / Meyer, Nele; Sietiö, Outi-Maaria; Adamczyk, Sylwia; Ambus, Per; Biasi, Christina; Glaser, Bruno; Kalu, Subin; Martin, Angela; Mganga, Kevin Z.; Olin, Miikka; Seppänen, Aino; Shrestha, Rashmi; Karhu, Kristiina.

I: Applied Soil Ecology, Bind 191, 105052, 2023.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Meyer, N, Sietiö, O-M, Adamczyk, S, Ambus, P, Biasi, C, Glaser, B, Kalu, S, Martin, A, Mganga, KZ, Olin, M, Seppänen, A, Shrestha, R & Karhu, K 2023, 'Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability?', Applied Soil Ecology, bind 191, 105052. https://doi.org/10.1016/j.apsoil.2023.105052

APA

Meyer, N., Sietiö, O-M., Adamczyk, S., Ambus, P., Biasi, C., Glaser, B., Kalu, S., Martin, A., Mganga, K. Z., Olin, M., Seppänen, A., Shrestha, R., & Karhu, K. (2023). Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability? Applied Soil Ecology, 191, [105052]. https://doi.org/10.1016/j.apsoil.2023.105052

Vancouver

Meyer N, Sietiö O-M, Adamczyk S, Ambus P, Biasi C, Glaser B o.a. Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability? Applied Soil Ecology. 2023;191. 105052. https://doi.org/10.1016/j.apsoil.2023.105052

Author

Meyer, Nele ; Sietiö, Outi-Maaria ; Adamczyk, Sylwia ; Ambus, Per ; Biasi, Christina ; Glaser, Bruno ; Kalu, Subin ; Martin, Angela ; Mganga, Kevin Z. ; Olin, Miikka ; Seppänen, Aino ; Shrestha, Rashmi ; Karhu, Kristiina. / Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability?. I: Applied Soil Ecology. 2023 ; Bind 191.

Bibtex

@article{8be707ace6e04e9c90524198e3b66548,
title = "Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability?",
abstract = "Labile carbon (C) fractions, such as sugars, may persist in soil due to their incorporation into microbial biomass and are ultimately stabilized as microbial necromass as part of stable soil organic matter (SOM). However, the underlying factors and mechanisms are currently highly debated. To address this knowledge gap, we conducted a 1-year greenhouse experiment including four treatments: (1) bare soil, (2) bare soil and nitrogen (N) fertilization, (3) soil planted with a tree, and (4) tree and N. The boreal forest soil was a sandy and nutrient-poor Podzol taken from 0 to 20 cm depth and trees were Pinus sylvestris. We hypothesized that: (1) originally labile C does not accumulate under N-deficient conditions, as microbial residues may be intensely recycled for N acquisition and (2) differences in N supply and demand change the functionality and composition of the microbial community, which will be reflected in the stabilization of microbial C. We added 13C glucose to the soil and measured 13C recovery to trace the fate of added C in soil, microbial biomass (MBC), dissolved organic C (DOC), phospholipid fatty acids (PLFA), and amino sugars as biomarker for microbial necromass. We also analyzed microbial community structure and enzyme activities. Around 40 % of the added C was mineralized after one day. Mineralization of the added C continued for 6 months, but stabilized thereafter. After 1 year, the treatment with both tree and N fertilization had the highest amount of added 13C (34 %) remaining in soil compared to the other treatments (18 %). The recovery of 13C in DOC was <1 % from the 3rd day onwards, but remained higher in MBC (2 %) and microbial necromass (1.5 %) after 1 year. N fertilization increased bacterial growth on 13C-glucose and abundance of gram-positive bacteria, while trees increased the abundance of symbiotrophic fungi. The formation of more stable C in the treatment with both tree and N indicates that under those conditions, recycling of microbial necromass for N acquisition is lower and the changed microbial composition leaves behind more stable residues.",
keywords = "Microbial carbon pump, Microbial community, Microbial necromass, Microbial nitrogen mining, Nitrogen limitation, Pinus sylvestris",
author = "Nele Meyer and Outi-Maaria Sieti{\"o} and Sylwia Adamczyk and Per Ambus and Christina Biasi and Bruno Glaser and Subin Kalu and Angela Martin and Mganga, {Kevin Z.} and Miikka Olin and Aino Sepp{\"a}nen and Rashmi Shrestha and Kristiina Karhu",
note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",
year = "2023",
doi = "10.1016/j.apsoil.2023.105052",
language = "English",
volume = "191",
journal = "Agro-Ecosystems",
issn = "0167-8809",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Fate and stabilization of labile carbon in a sandy boreal forest soil – A question of nitrogen availability?

AU - Meyer, Nele

AU - Sietiö, Outi-Maaria

AU - Adamczyk, Sylwia

AU - Ambus, Per

AU - Biasi, Christina

AU - Glaser, Bruno

AU - Kalu, Subin

AU - Martin, Angela

AU - Mganga, Kevin Z.

AU - Olin, Miikka

AU - Seppänen, Aino

AU - Shrestha, Rashmi

AU - Karhu, Kristiina

N1 - Publisher Copyright: © 2023 Elsevier B.V.

PY - 2023

Y1 - 2023

N2 - Labile carbon (C) fractions, such as sugars, may persist in soil due to their incorporation into microbial biomass and are ultimately stabilized as microbial necromass as part of stable soil organic matter (SOM). However, the underlying factors and mechanisms are currently highly debated. To address this knowledge gap, we conducted a 1-year greenhouse experiment including four treatments: (1) bare soil, (2) bare soil and nitrogen (N) fertilization, (3) soil planted with a tree, and (4) tree and N. The boreal forest soil was a sandy and nutrient-poor Podzol taken from 0 to 20 cm depth and trees were Pinus sylvestris. We hypothesized that: (1) originally labile C does not accumulate under N-deficient conditions, as microbial residues may be intensely recycled for N acquisition and (2) differences in N supply and demand change the functionality and composition of the microbial community, which will be reflected in the stabilization of microbial C. We added 13C glucose to the soil and measured 13C recovery to trace the fate of added C in soil, microbial biomass (MBC), dissolved organic C (DOC), phospholipid fatty acids (PLFA), and amino sugars as biomarker for microbial necromass. We also analyzed microbial community structure and enzyme activities. Around 40 % of the added C was mineralized after one day. Mineralization of the added C continued for 6 months, but stabilized thereafter. After 1 year, the treatment with both tree and N fertilization had the highest amount of added 13C (34 %) remaining in soil compared to the other treatments (18 %). The recovery of 13C in DOC was <1 % from the 3rd day onwards, but remained higher in MBC (2 %) and microbial necromass (1.5 %) after 1 year. N fertilization increased bacterial growth on 13C-glucose and abundance of gram-positive bacteria, while trees increased the abundance of symbiotrophic fungi. The formation of more stable C in the treatment with both tree and N indicates that under those conditions, recycling of microbial necromass for N acquisition is lower and the changed microbial composition leaves behind more stable residues.

AB - Labile carbon (C) fractions, such as sugars, may persist in soil due to their incorporation into microbial biomass and are ultimately stabilized as microbial necromass as part of stable soil organic matter (SOM). However, the underlying factors and mechanisms are currently highly debated. To address this knowledge gap, we conducted a 1-year greenhouse experiment including four treatments: (1) bare soil, (2) bare soil and nitrogen (N) fertilization, (3) soil planted with a tree, and (4) tree and N. The boreal forest soil was a sandy and nutrient-poor Podzol taken from 0 to 20 cm depth and trees were Pinus sylvestris. We hypothesized that: (1) originally labile C does not accumulate under N-deficient conditions, as microbial residues may be intensely recycled for N acquisition and (2) differences in N supply and demand change the functionality and composition of the microbial community, which will be reflected in the stabilization of microbial C. We added 13C glucose to the soil and measured 13C recovery to trace the fate of added C in soil, microbial biomass (MBC), dissolved organic C (DOC), phospholipid fatty acids (PLFA), and amino sugars as biomarker for microbial necromass. We also analyzed microbial community structure and enzyme activities. Around 40 % of the added C was mineralized after one day. Mineralization of the added C continued for 6 months, but stabilized thereafter. After 1 year, the treatment with both tree and N fertilization had the highest amount of added 13C (34 %) remaining in soil compared to the other treatments (18 %). The recovery of 13C in DOC was <1 % from the 3rd day onwards, but remained higher in MBC (2 %) and microbial necromass (1.5 %) after 1 year. N fertilization increased bacterial growth on 13C-glucose and abundance of gram-positive bacteria, while trees increased the abundance of symbiotrophic fungi. The formation of more stable C in the treatment with both tree and N indicates that under those conditions, recycling of microbial necromass for N acquisition is lower and the changed microbial composition leaves behind more stable residues.

KW - Microbial carbon pump

KW - Microbial community

KW - Microbial necromass

KW - Microbial nitrogen mining

KW - Nitrogen limitation, Pinus sylvestris

U2 - 10.1016/j.apsoil.2023.105052

DO - 10.1016/j.apsoil.2023.105052

M3 - Journal article

AN - SCOPUS:85165076693

VL - 191

JO - Agro-Ecosystems

JF - Agro-Ecosystems

SN - 0167-8809

M1 - 105052

ER -

ID: 362702096