Savanna vegetation-fire-climate relationships differ among continents

Caroline E R Lehmann*, T. Michael Anderson, Mahesh Sankaran, Steven I. Higgins, Sally Archibald, William A. Hoffmann, Niall P. Hanan, Richard J. Williams, Roderick J. Fensham, Jeanine Felfili, Lindsay B. Hutley, Jayashree Ratnam, Jose San Jose, Ruben Montes, Don Franklin, Jeremy Russell-Smith, Casey M. Ryan, Giselda Durigan, Pierre Hiernaux, Ricardo HaidarDavid M J S Bowman, William J. Bond

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    366 Citations (Scopus)

    Abstract

    Ecologists have long sought to understand the factors controlling the structure of savanna vegetation. Using data from 2154 sites in savannas across Africa, Australia, and South America, we found that increasing moisture availability drives increases in fire and tree basal area, whereas fire reduces tree basal area. However, among continents, the magnitude of these effects varied substantially, so that a single model cannot adequately represent savanna woody biomass across these regions. Historical and environmental differences drive the regional variation in the functional relationships between woody vegetation, fire, and climate. These same differences will determine the regional responses of vegetation to future climates, with implications for global carbon stocks.

    Original languageEnglish
    Pages (from-to)548-552
    Number of pages5
    JournalScience
    Volume343
    Issue number6170
    DOIs
    Publication statusPublished - 31 Jan 2014

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