Atmospheric science: Rising atmospheric CO2 reduces sequestration of root-derived soil carbon

Research output: Contribution to journalArticle

  • External authors:
  • James Heath
  • Edward Ayres
  • Malcolm Possell
  • Helaina I J Black
  • Helen Grant
  • Phil Ineson
  • Gerhard Kerstiens

Abstract

Forests have a key role as carbon sinks, which could potentially mitigate the continuing increase in atmospheric carbon dioxide concentration and associated climate change. We show that carbon dioxide enrichment, although causing short-term growth stimulation in a range of European tree species, also leads to an increase in soil microbial respiration and a marked decline in sequestration of root-derived carbon in the soil. These findings indicate that, should similar processes operate in forest ecosystems, the size of the annual terrestrial carbon sink may be substantially reduced, resulting in a positive feedback on the rate of increase in atmospheric carbon dioxide concentration.

Bibliographical metadata

Original languageEnglish
Pages (from-to)1711-1713
Number of pages2
JournalScience
Volume309
Issue number5741
DOIs
Publication statusPublished - 9 Sep 2005