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Tree mode of death and mortality risk factors across Amazon forests

Abstract:

The carbon sink capacity of tropical forests is substantially affected by tree mortality. However, the main drivers of tropical tree death remain largely unknown. Here we present a pan-Amazonian assessment of how and why trees die, analysing over 120,000 trees representing > 3800 species from 189 long-term RAINFOR forest plots. While tree mortality rates vary greatly Amazon-wide, on average trees are as likely to die standing as they are broken or uprooted—modes of death with different ecological consequences. Species-level growth rate is the single most important pbkp_redictor of tree death in Amazonia, with faster-growing species being at higher risk. Within species, however, the slowest-growing trees are at greatest risk while the effect of tree size varies across the basin. In the driest Amazonian region species-level bioclimatic distributional patterns also pbkp_redict the risk of death, suggesting that these forests are experiencing climatic conditions beyond their adaptative limits. These results provide not only a holistic pan-Amazonian picture of tree death but large-scale evidence for the overarching importance of the growth–survival trade-off in driving tropical tree mortality.

Año de publicación:

2020

Keywords:

    Fuente:

    scopusscopus
    googlegoogle

    Tipo de documento:

    Article

    Estado:

    Acceso abierto

    Áreas de conocimiento:

    • Ecología
    • Ecología
    • Ecología

    Áreas temáticas:

    • Ecología
    • Factores que afectan al comportamiento social
    • Geología, hidrología, meteorología

    Contribuidores:

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    Bonal D.Bonal D.
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    Brienen R.J.W.Brienen R.J.W.
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    Monteagudo-Mendoza A.Monteagudo-Mendoza A.
    Moscoso V.C.Moscoso V.C.
    Laurance W.F.Laurance W.F.
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    Bongers F.Bongers F.
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    Nogueira Lima A.J.Nogueira Lima A.J.
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