Final published version
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Differential structure and function of phosphorus‐mineralizing microbial communities in organic and upper mineral soil horizons across a temperate rainforest chronosequence
AU - Dunfield, Kari E.
AU - Mitter, Eduardo K.
AU - Richardson, Alan E.
AU - Gaiero, Jonathan R.
AU - Khosla, Kamini
AU - Chen, Xiaodong
AU - Wells, Andrew
AU - Haygarth, Philip M.
AU - Condron, Leo M.
PY - 2024/3/31
Y1 - 2024/3/31
N2 - Microbial community structure and function were assessed in the organic and upper mineral soil across a ~4000‐year dune‐based chronosequence at Big Bay, New Zealand, where total P declined and the proportional contribution of organic soil in the profile increased with time. We hypothesized that the organic and mineral soils would show divergent community evolution over time with a greater dependency on the functionality of phosphatase genes in the organic soil layer as it developed. The structure of bacterial, fungal, and phosphatase‐harbouring communities was examined in both horizons across 3 dunes using amplicon sequencing, network analysis, and qPCR. The soils showed a decline in pH and total phosphorus (P) over time with an increase in phosphatase activity. The organic horizon had a wider diversity of Class A (phoN/phoC) and phoD‐harbouring communities and a more complex microbiome, with hub taxa that correlated with P. Bacterial diversity declined in both horizons over time, with enrichment of Planctomycetes and Acidobacteria. More complex fungal communities were evident in the youngest dune, transitioning to a dominance of Ascomycota in both soil horizons. Higher phosphatase activity in older dunes was driven by less diverse P‐mineralizing communities, especially in the organic horizon.
AB - Microbial community structure and function were assessed in the organic and upper mineral soil across a ~4000‐year dune‐based chronosequence at Big Bay, New Zealand, where total P declined and the proportional contribution of organic soil in the profile increased with time. We hypothesized that the organic and mineral soils would show divergent community evolution over time with a greater dependency on the functionality of phosphatase genes in the organic soil layer as it developed. The structure of bacterial, fungal, and phosphatase‐harbouring communities was examined in both horizons across 3 dunes using amplicon sequencing, network analysis, and qPCR. The soils showed a decline in pH and total phosphorus (P) over time with an increase in phosphatase activity. The organic horizon had a wider diversity of Class A (phoN/phoC) and phoD‐harbouring communities and a more complex microbiome, with hub taxa that correlated with P. Bacterial diversity declined in both horizons over time, with enrichment of Planctomycetes and Acidobacteria. More complex fungal communities were evident in the youngest dune, transitioning to a dominance of Ascomycota in both soil horizons. Higher phosphatase activity in older dunes was driven by less diverse P‐mineralizing communities, especially in the organic horizon.
U2 - 10.1111/1462-2920.16600
DO - 10.1111/1462-2920.16600
M3 - Journal article
VL - 26
JO - Environmental Microbiology
JF - Environmental Microbiology
SN - 1462-2912
IS - 3
M1 - e16600
ER -