Plant and Soil

, Volume 391, Issue 1–2, pp 321–331 | Cite as

Response of belowground communities to short-term phosphorus addition in a phosphorus-limited woodland

  • Uffe N. Nielsen
  • Samantha Prior
  • Brendan Delroy
  • Jennifer K. M. Walker
  • David S. Ellsworth
  • Jeff R. PowellEmail author
Regular Article



Soil biota regulate essential ecosystem processes but our understanding of how soil fertility constrains biotic interactions remains limited. We investigated belowground responses to short-term phosphorus (P) fertilization in a P-limited woodland.


Ten Eucalyptus tereticornis were randomly selected and five fertilized with superphosphate equivalent to 50 kg P ha−1 over 6 months. We estimated aboveground (understory) and belowground plant biomass, and collected samples for soil chemistry, arbuscular mycorrhizal (AM) root colonization, soil fungal abundance and community composition, and extraction of nematodes and microarthropods.


P-fertilization increased root biomass, abundance of non-AM fungi, and abundances of Collembola, and altered fungal community structure, but was associated with a decrease in predatory nematodes. Structural equation modelling indicated that effects on Collembola and fungal abundances were mediated by direct effects of the fertilizer treatment and/or indirect effects via root biomass responses. However, fungal community compositional changes and reductions in predatory nematodes resulted primarily due to fertilization-mediated changes in soil pH.


Our study shows that understory plant communities and soil biota are P-limited at the study site but that some biotic groups appear to be more sensitive to changes in soil pH than to increases in P availability.


Cumberland plain woodland Fungi Microarthropods Nematoda Phosphorus fertilization pH 



Dr Kaushal Tewari and Sarah Beck provided technical assistance with sample processing. This work was supported by the Australian Reseach Council Discovery Grants scheme (DP110105102 and DP130102501). EucFACE is supported by the Australian Commonwealth government in collaboration with the University of Western Sydney. This is part of a TERN Super-site facility. EucFACE was built as an initiative of the Australian government as part of the Nation-building Economic Stimulus Package.

Supplementary material

11104_2015_2432_MOESM1_ESM.pdf (10 kb)
Supplemental Figure 1 Boxplots indicating proportional abundances of DNA sequencing reads in control (ctrl) and fertilized (fert) plots under E. tereticornis. OTU numbers refer to the labels in Table 2. The number in parentheses represents the indicator value for that OTU. The box indicates the interquartile range, the thick line represents the median, and the whiskers extend to either the extremes of the sampled data or to 1.5 times the interquartile range, whichever is closer to the median. (PDF 9 kb)


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Uffe N. Nielsen
    • 1
    • 2
  • Samantha Prior
    • 1
    • 2
  • Brendan Delroy
    • 1
    • 2
  • Jennifer K. M. Walker
    • 1
  • David S. Ellsworth
    • 1
  • Jeff R. Powell
    • 1
    Email author
  1. 1.Hawkesbury Institute for the EnvironmentUniversity of Western SydneyPenrithAustralia
  2. 2.School of Science and HealthUniversity of Western SydneyPenrithAustralia

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