Forest carbon sink neutralized by pervasive growth-lifespan trade-offs

Autor(es):Mostrar menos -

Brienen, R. J. W. ^[1] ; Caldwell, L. ^[1] ; Duchesne, L. ^[2] ; Voelker, S. ^[3] ; Barichivich, J. ^{[4, 5]} ; Baliva, M. ^[6] ; Ceccantini, G. ^[7] ; Di Filippo, A. ^[6] ; Helama, S. ^[8] ; Locosselli, G. M. ^[7] ; Lopez, L. ^[9] ; Piovesan, G. ^[6] ; Schongart, J. ^[10] ; Villalba, R. ^[9] ; Gloor, E. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire - England

^[2] Minist Forets Faune & Parcs, Direct Rech Forestiere, 2700 Einstein St, Quebec City G1P 3W8, PQ - Canada

^[3] SUNY ESF, Dept Environm & Forest Biol, New York, NY 13210 - USA

^[4] UVSQ, Lab Sci Climat & Environm, IPSL, CNRS, CEA, F-91191 Gif Sur Yvette - France

^[5] Pontificia Univ Catolica Valparaiso, Inst Geog, Valparaiso - Chile

^[6] Univ Tuscia, 6Department Agr & Forest Sci DAFNE, Via SC de Lellis, I-01100 Viterbo - Italy

^[7] Univ Sao Paulo, Inst Biosci, Dept Bot, Rua Matao 277, BR-05508090 Sao Paulo, SP - Brazil

^[8] Nat Resources Inst Finland, Ounasjoentie 6, Rovaniemi 96200 - Finland

^[9] CONICET Mendoza, Inst Argentino Nivol Glaciol & Ciencias Ambient I, CC 330, RA-5500 Mendoza - Argentina

^[10] Inst Nacl Pesquisas Amazonia INPA, Coordenacao Dinam Ambiental CODAM, Ave Andre Araujo 2936, BR-69067375 Manaus, Amazonas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NATURE COMMUNICATIONS; v. 11, n. 1 SEP 8 2020.
• Citações Web of Science: 13

Resumo

Land vegetation is currently taking up large amounts of atmospheric CO2, possibly due to tree growth stimulation. Extant models predict that this growth stimulation will continue to cause a net carbon uptake this century. However, there are indications that increased growth rates may shorten trees' lifespan and thus recent increases in forest carbon stocks may be transient due to lagged increases in mortality. Here we show that growth-lifespan trade-offs are indeed near universal, occurring across almost all species and climates. This trade-off is directly linked to faster growth reducing tree lifespan, and not due to covariance with climate or environment. Thus, current tree growth stimulation will, inevitably, result in a lagged increase in canopy tree mortality, as is indeed widely observed, and eventually neutralise carbon gains due to growth stimulation. Results from a strongly data-based forest simulator confirm these expectations. Extant Earth system model projections of global forest carbon sink persistence are likely too optimistic, increasing the need to curb greenhouse gas emissions. (AU)

• Processo FAPESP: 12/50457-4 - Twentieth century changes of tree ring isotopes in Southeastern Brazilian forests: how do climate conditions influence growth and water use efficiency and thus enforce tree migration
• Beneficiário: Veronica Angyalossy
• Modalidade de apoio: Auxílio à Pesquisa - Regular