Amazon forest response to CO2 fertilization dependent on plant phosphorus acquisition

Author(s):Show less -

Fleischer, Katrin ^[1] ; Rammigl, Anja ^[1] ; De Kauwe, Martin G. ^{[2, 3]} ; Walker, Anthony P. ^{[4, 5]} ; Domingues, Tomas F. ^[6] ; Fuchslueger, Lucia ^{[7, 8]} ; Garcia, Sabrina ^[7] ; Goll, Daniel S. ^{[9, 10]} ; Grandis, Adriana ^[11] ; Jiang, Mingkai ^[12] ; Haverd, Vanessa ^[13] ; Hofhansl, Florian ^[14] ; Holm, Jennifer A. ^[15] ; Kruijt, Bart ^[16] ; Leung, Felix ^{[17, 18]} ; Medlyn, Belinda E. ^[12] ; Mercado, Lina M. ^{[17, 19]} ; Norby, Richard J. ^{[4, 5]} ; Pak, Bernard ^[20] ; von Randow, Celso ^[21] ; Quesada, Carlos A. ^[7] ; Schaap, Karst J. ^[7] ; Valverde-Barrantes, Oscar J. ^[22] ; Wang, Ying-Ping ^[20] ; Yang, Xiaojuan ^{[4, 5]} ; Zaehle, Sonke ^[23] ; Zhu, Qing ^[15] ; Lapola, David M. ^[24]

Affiliation:Show less -

^[1] Tech Univ Munich, Land Surface Atmosphere Interact, Munich - Germany

^[2] Univ New South Wales, Climate Change Res Ctr, Sydney, NSW - Australia

^[3] ARC Ctr Excellence Climate Extremes, Sydney, NSW - Australia

^[4] Oak Ridge Natl Lab, Environm Sci Div, Oak Ridge, TN - USA

^[5] Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN - USA

^[6] Univ Sao Paulo, Dept Biol, FFCLRP, Ribeirao Preto - Brazil

^[7] Natl Inst Amazonian Res INPA, Manaus, Amazonas - Brazil

^[8] Univ Antwerp, Dept Biol, Antwerp - Belgium

^[9] CEA CNRS UVSQ, IPSL, LSCE, St Aubin - France

^[10] Univ Augsburg, Lehrstuhl Phys Geog Mit Schwerpunkt Klimaforsch, Augsburg - Germany

^[11] Univ Sao Paulo, Dept Bot, Sao Paulo - Brazil

^[12] Western Sydney Univ, Hawkesbury Inst Environm, Sydney, NSW - Australia

^[13] CSIRO Oceans & Atmosphere, Canberra, ACT - Australia

^[14] Int Inst Appl Syst Anal, Laxenburg - Austria

^[15] Lawrence Berkeley Natl Lab, Berkeley, CA - USA

^[16] Alterra Wageningen, Wageningen - Netherlands

^[17] Univ Exeter, Coll Life & Environm Sci, Exeter, Devon - England

^[18] Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Hong Kong - Peoples R China

^[19] Ctr Ecol & Hydrol, Wallingford, Oxon - England

^[20] CSIRO Oceans & Atmosphere, Aspendale, Vic - Australia

^[21] Natl Inst Space Res INPE, Sao Jose Dos Campos - Brazil

^[22] Florida Int Univ, Int Ctr Trop Bot, Miami, FL 33199 - USA

^[23] Max Planck Inst Biogeochem, Jena - Germany

^[24] Univ Estadual Campinas, Ctr Meteorol & Climat Res Appl Agr, Campinas, SP - Brazil

• Document type: Journal article
• Source: NATURE GEOSCIENCE; v. 12, n. 9, p. 736+, SEP 2019.
• Web of Science Citations: 4

Abstract

Global terrestrial models currently predict that the Amazon rainforest will continue to act as a carbon sink in the future, primarily owing to the rising atmospheric carbon dioxide (CO 2 ) concentration. Soil phosphorus impoverishment in parts of the Amazon basin largely controls its functioning, but the role of phosphorus availability has not been considered in global model ensembles-for example, during the Fifth Climate Model Intercomparison Project. Here we simulate the planned free-air CO2 enrichment experiment AmazonFACE with an ensemble of 14 terrestrial ecosystem models. We show that phosphorus availability reduces the projected CO2-induced biomass carbon growth by about 50% to 79 +/- 63 g C m(-2) yr(-1) over 15 years compared to estimates from carbon and carbon-nitrogen models. Our results suggest that the resilience of the region to climate change may be much less than previously assumed. Variation in the biomass carbon response among the phosphorus-enabled models is considerable, ranging from 5 to 140 g C m(-)2 yr(-1), owing to the contrasting plant phosphorus use and acquisition strategies considered among the models. The Amazon forest response thus depends on the interactions and relative contributions of the phosphorus acquisition and use strategies across individuals, and to what extent these processes can be upregulated under elevated CO2. (AU)

• FAPESP's process: 15/02537-7 - AmazonFACE/ME: the Amazon-FACE Model-Experiment integration project - the role of biodiversity and climate feedbacks
• Grantee: David Montenegro Lapola
• Support Opportunities: Research Program on Global Climate Change - Young Investigators