Our group asks how plant symbionts and plant/microbial traits regulate the way grasslands take up, store and lose carbon and nutrients — and how this changes under nitrogen deposition, drought and warming.

Mycorrhizal fungi and plant nutrition

How arbuscular mycorrhizal (AM) fungi transfer nitrogen and phosphorus to plants, reduce nutrient losses such as P leaching and N₂O emissions, and how the functional diversity of AM fungal communities shapes plant resource allocation and growth.

Genome size as a functional trait

Using plant and fungal genome size to understand community assembly and ecological strategies — from β-diversity of temperate grasslands to fungal life-history strategies along soil fertility gradients and plant–microbe interactions.

Grassland carbon and nutrient cycling

Long-term nitrogen and multi-nutrient addition experiments in the Inner Mongolia steppe: plant stoichiometry, soil organic carbon fractions (POC vs. MAOC), phytolith-occluded carbon, soil aggregates and litter decomposition.

Climate extremes and plant–soil feedbacks

How drought and warming alter plant productivity, root traits, belowground carbon allocation and mycorrhizal partnerships in pasture and grassland systems, drawing on field experiments in Australia and China.

Approaches

Long-term field manipulation experiments, glasshouse experiments, stable isotope tracing (¹³C, ¹⁵N), amplicon sequencing of fungal and bacterial communities, trait-based and meta-analytical approaches, and statistical modelling in R.

Selected publications

  • Zhang H, Weinberger N, Powell JR, Gifford M (2026) Functional diversity of arbuscular mycorrhizal fungi drives divergent plant resource allocation strategies under nitrogen limitation. Journal of Experimental Botany doi:10.1093/jxb/eraf459
  • Zhang H, Liu H, Han X (2024) Traits-based approach: leveraging genome size in plant–microbe interactions. Trends in Microbiology doi:10.1016/j.tim.2023.10.004
  • Zhang H, Churchill AC, Anderson IC, Igwenagu C, Power SA, Plett JM, Macdonald CA, Pendall E, Carrillo Y, Powell JR (2023) Ecological stoichiometry and fungal community turnover reveal variation among mycorrhizal partners in their responses to warming and drought. Molecular Ecology doi:10.1111/mec.16278
  • Zhang HY, Bissett A, Aguilar-Trigueros CA, Liu HW, Powell JR (2023) Fungal genome size and composition reflect ecological strategies along soil fertility gradients. Ecology Letters doi:10.1111/ele.14224
  • Zhang HY, Lü XT, Wei CZ, Powell JR, Wang XB, Xing DL, Xu ZW, Li HL, Han XG (2023) β-diversity in temperate grasslands is driven by stronger environmental filtering of plant species with large genomes. Ecology doi:10.1002/ecy.3941
  • Zhang HY, Lü XT, Knapp AK, Hartmann H, Bai E, Wang XB, Wang ZW, Wang XG, Yu Q, Han XG, Niu S (2018) Facilitation by leguminous shrubs increases along a precipitation gradient. Functional Ecology doi:10.1111/1365-2435.12941
  • Zhang HY, Lü XT, Hartmann H, Keller A, Han XG, Trumbore S, Phillips RP (2018) Foliar nutrient resorption differs between arbuscular mycorrhizal and ectomycorrhizal trees at local and global scales. Global Ecology and Biogeography doi:10.1111/geb.12738