Nitrogen limitation constrains sustainability of ecosystem response to CO2

Peter B. Reich*, Sarah E. Hobbie, Tali Lee, David S. Ellsworth, Jason B. West, David Tilman, Johannes M.H. Knops, Shahid Naeem, Jared Trost

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

789 Citations (Scopus)
Plum Print visual indicator of research metrics
  • Citations
    • Citation Indexes: 783
    • Policy Citations: 20
  • Captures
    • Readers: 927
  • Mentions
    • News Mentions: 1
    • References: 1
see details

Abstract

Enhanced plant biomass accumulation in response to elevated atmospheric CO2 concentration could dampen the future rate of increase in CO 2 levels and associated climate warming. However, it is unknown whether CO2-induced stimulation of plant growth and biomass accumulation will be sustained or whether limited nitrogen (N) availability constrains greater plant growth in a CO2-enriched world 1-9. Here we show, after a six-year field study of perennial grassland species grown under ambient and elevated levels of CO2 and N, that low availability of N progressively suppresses the positive response of plant biomass to elevated CO2. Initially, the stimulation of total plant biomass by elevated CO2 was no greater at enriched than at ambient N supply. After four to six years, however, elevated CO2 stimulated plant biomass much less under ambient than enriched N supply. This response was consistent with the temporally divergent effects of elevated CO2 on soil and plant N dynamics at differing levels of N supply. Our results indicate that variability in availability of soil N and deposition of atmospheric N are both likely to influence the response of plant biomass accumulation to elevated atmospheric CO2. Given that limitations to productivity resulting from the insufficient availability of N are widespread in both unmanaged and managed vegetation5, 7-9, soil N supply is probably an important constraint on global terrestrial responses to elevated CO2.

Original languageEnglish
Pages (from-to)922-925
Number of pages4
JournalNature
Volume440
Issue number7086
DOIs
Publication statusPublished - 13 Apr 2006
Externally publishedYes

Fingerprint

Dive into the research topics of 'Nitrogen limitation constrains sustainability of ecosystem response to CO2'. Together they form a unique fingerprint.

Cite this

Reich, P. B., Hobbie, S. E., Lee, T., Ellsworth, D. S., West, J. B., Tilman, D., Knops, J. M. H., Naeem, S., & Trost, J. (2006). Nitrogen limitation constrains sustainability of ecosystem response to CO2. Nature, 440(7086), 922-925. https://doi.org/10.1038/nature04486