Shuijin Hu

Bio

Research:

Microbial mediation of plant and ecosystem responses to global change components. We are currently investigating the mechanisms through which soil microorganisms mediate plant and ecosystem responses to elevated atmospheric CO2, O3 and N inputs. Our major focus is on how microorganisms respond to alterations in C and N availability under these global change components, and what are the implications of the resulting changes in terms of ecosystem C storage.

Microbial interactions and pathogen/disease suppression. We want to know whether and how the structure, diversity and activities of soil microbial and mesofaunal communities influence the population dynamics and activities of soilborne pathogenic fungi, Pythium spp. and Rhizoctonia spp. in particular.

Microbial mediation of plant interactions. We are interested in understanding how microbes, mycorrhizal and endophytic fungi in particular, modulate the interactions among coexisting plant species. Effects of disturbance on the structure and activities of soil organisms. Our current research examines how disturbance such as conventional farming and elevated atmospheric CO2 affects soil microbes and soil food web interactions and how the resulting alterations in soil organisms influence C and N cycling.

Focused Areas:

• Soil Microbial Ecology
• Ecosystem Ecology

Current Projects:

• Greenhouse gas emissions from agroecosystems
• Mycorrhizal effects on soil C and N dynamics under elevated CO2 and climate
  warming
• Endophytic bacteria in switchgrass and their effects on soil C and N cycling

Teaching:

• Soil/Ecosystem Ecology, PP590/790E
• Ecology, Evolution & Biodiversity, BO 595E (co-teaching)
• Climate Chang and Agriculture. PP590/PP790 (Special Topics)
• New and re-emerging plant diseases in the US (Discussion group) (PP610Y/810Y)

Area(s) of Expertise

Plant-microbial interactions; Microbial controls over global biogeochemical cycles; Climate change effects on plant-microbe interactions; Ecosystem C sequestration; Organic farming and greenhouse gas emissions from agroecosystems.

Publications

• Canopy and understory nitrogen additions differently affect soil microbial residual carbon in a temperate forest , GLOBAL CHANGE BIOLOGY (2024)
• Inhibition of autotrophic nitrifiers in a nitrogen-rich paddy soil by elevated CO₂ , NATURE GEOSCIENCE (2024)
• Intermediate soil acidification induces highest nitrous oxide emissions , NATURE COMMUNICATIONS (2024)
• Long-term organic amendments increase the vulnerability of microbial respiration to environmental changes: Evidence from field and laboratory studies , SCIENCE OF THE TOTAL ENVIRONMENT (2024)
• Multi-amplicon nitrogen cycling gene standard: An innovative approach for quantifying N-transforming soil microbes in terrestrial ecosystems , SOIL BIOLOGY & BIOCHEMISTRY (2024)
• Mycorrhizal Symbiosis Increases Plant Phylogenetic Diversity and Regulates Community Assembly in Grasslands , ECOLOGY LETTERS (2024)
• Nitrogen availability mediates the effects of roots and mycorrhizal fungi on soil organic carbon decomposition: A meta-analysis , PEDOSPHERE (2024)
• Nutrient-induced acidification modulates soil biodiversity-function relationships , NATURE COMMUNICATIONS (2024)
• Precipitation- rather than temperature-driven pattern in belowground biomass and root:shoot ratio across the Qinghai-Tibet Plateau , SCIENCE OF THE TOTAL ENVIRONMENT (2024)
• Alkalinity exacerbates phosphorus deficiency in subtropical red soils: Insights from phosphate-solubilizing fungi , SOIL USE AND MANAGEMENT (2023)