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Differential linkages between soil respiration components and microbial community structures under long-term forest conversion

  • Soils, Sec 5 • Soil and Landscape Ecology • Research Article
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Abstract

Purpose

Soil respiration (Rs) can be significantly impacted by land-use change (LUC). This study aimed to determine the response of Rs components (i.e., heterotrophic respiration (Rh) and autotrophic respiration (Ra)) to long-term forest conversion and explore their associations with soil microbial community (SMC) structures.

Materials and methods

Three plantations converted from natural forest 36 years ago were investigated: Cryptomeria fortune (CF), Cunninghamia lanceolata (CL), and Metasequoia glyptostroboides (MG), with the control of an adjacent natural forest (NF). In each forest site, Rh and Ra were measured using the root trenching method during the growing season. SMC structures in trenched and rhizosphere soils (0–10 cm depth) were analyzed.

Results

We observed an evident differentiation between SMC structures in trenched and rhizosphere soils across forest types. SMC structural dynamic in trenched soil was primarily driven by the ratio of dissolved organic carbon © to dissolved organic nitrogen (DON) and bulk density, whereas that in rhizosphere soil was primarily driven by DON and pH. During the growing season, both Rh and Ra were greater in MG than in NF, but they showed non-significant differences among NF, CF, and CL. The Rh pattern was primarily modified by the SMC structure (e.g., arbuscular mycorrhizal fungi (AMF)) and soil temperature, whereas the Ra pattern was primarily modified by the SMC structure in rhizosphere soil (e.g., gram-positive bacteria (GP)) in addition to fine root quality and soil temperature.

Conclusions

Rh and Ra patterns were jointly modified by SMC structure and microenvironment over long-term forest conversion, emphasizing the underlying roles of plant community attributes and forest management in soil C emission into the atmosphere.

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Abbreviations

Rs:

Soil respiration

Rh:

Heterotrophic respiration

Ra:

Autotrophic respiration

LUC:

Land-use change

PLFA:

Phospholipid fatty acid

PVC:

Polyvinyl chloride

RDA:

Redundancy analysis

SMC:

Soil microbial community

ACT:

Actinomycetes

GP:

Gram-positive bacteria

GN:

Gram-negative bacteria

AMF:

Arbuscular mycorrhizal fungi

F:B:

The ratio of fungi to bacteria

GP:GN:

The ratio of GP to GN

NF:

Natural forest

CL:

Cunninghamia lanceolata Plantation

MG:

Metasequoia glyptostroboides Plantation

CF:

Cryptomeria fortune Plantation

MMST:

Mean monthly soil temperature

SWC:

Soil water content

BD:

Bulk density

SOC:

Soil organic carbon

TN:

Total nitrogen

C:N:

The ratio of SOC to TN

DOC:

Dissolved organic carbon

DON:

Dissolved organic nitrogen

TDN:

Total dissolved N

DIN:

Dissolved inorganic nitrogen

MBC:

Microbial biomass carbon

AP:

Available phosphorus

Bfr:

Fine root biomass

Cfr:

Fine root carbon content

Nfr:

Fine root nitrogen content

C:Nfr:

The ratio of Cfr to Nfr

References

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Funding

This work was supported by the National Natural Science Foundation of China (31700462, 31870465). We thank the Badagongshan National Nature Reserve Administration for providing logistical support.

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Authors

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Correspondence to Feng Liu.

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Conflict of interest

The authors declare no competing interests.

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Responsible editor: Jizheng He

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Zhao, R., He, M. & Liu, F. Differential linkages between soil respiration components and microbial community structures under long-term forest conversion. J Soils Sediments 22, 1252–1262 (2022). https://doi.org/10.1007/s11368-022-03160-9

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  • DOI: https://doi.org/10.1007/s11368-022-03160-9

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