EGU22-8252
https://doi.org/10.5194/egusphere-egu22-8252
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Evidence of ecological critical slowing-down in temperate soils

fiona fraser1,2, Ronald Corstanje1, Lindsay Todman3,4, Diana Bello-Curás5, Gary Bending6, Lynda Deeks1, Jim Harris1, Sally Hilton6,7, Mark Pawlett1, Joanna Zawadzka1, Andrew Whitmore3, and Karl Ritz8
fiona fraser et al.
  • 1Cranfield University, College Road, Cranfield, MK43 0AL, UK
  • 2SRUC, Crop and Soil Systems, United Kingdom of Great Britain – England, Scotland, Wales (fiona.fraser@sruc.ac.uk)
  • 3Sustainable Agricultural Sciences, Rothamsted Research, Harpenden, AL5 2JQ, UK
  • 4School of Agriculture, Policy, and Development, University of Reading, Reading, RG6 6AR, UK
  • 5IIAG-CSIC, Avda. De Vigo s/n, 15705, Santiago de Compostela, Spain
  • 6School of Life Sciences, The University of Warwick, Coventry, CV4 7AL, UK
  • 7Micropathology Ltd, University of Warwick Science Park, Coventry, UK
  • 8School of Biosciences, The University of Nottingham, Sutton Bonington, Leicestershire, LE12 5RD, UK

The resilience of ecological systems is crucially important, particularly in the context of climate change. We present experimental evidence of critical slowing-down arising from perturbation of a key function in a complex ecosystem, exemplified by soil. Different behavioural classes in soil respiratory patterns were detected in response to repeated drying:rewetting cycles. We characterised these as adaptive, resilient, fragile or non-resilient. The latter involved increasing erratic behaviour (i.e. increasing variance), and the propagation of such behaviour (i.e. autocorrelation), interpreted as a critical slowing-down of the observed function. Soil microbial phenotype and land-use were predominantly related to variance and autocorrelation respectively. No relationship was found between biodiversity and resilience, but the ability of a community to be compositionally flexible rather than biodiversity per se appeared to be key to retaining system function. These data were used to map the extent to which soils are close to crossing into alternative stable states at a national scale.

How to cite: fraser, F., Corstanje, R., Todman, L., Bello-Curás, D., Bending, G., Deeks, L., Harris, J., Hilton, S., Pawlett, M., Zawadzka, J., Whitmore, A., and Ritz, K.: Evidence of ecological critical slowing-down in temperate soils, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8252, https://doi.org/10.5194/egusphere-egu22-8252, 2022.