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Title: Direct evidence for phosphorus limitation on Amazon forest productivity
Authors: Cunha, Hellen Fernanda Viana
Andersen, Kelly M.
Lugli, Laynara Figueiredo
Santana, Flavia Delgado
Aleixo, Izabela Fonseca
Moraes, Anna Martins
Garcia, Sabrina
Di Ponzio, Raffaello
Mendoza, Erick Oblitas
Brum, Bárbara
Rosa, Jéssica Schmeisk
Cordeiro, Amanda L.
Portela, Bruno Takeshi Tanaka
Ribeiro, Gyovanni
Coelho, Sara Deambrozi
de Souza, Sheila Trierveiler
Silva, Lara Siebert
Antonieto, Felipe
Pires, Maria
Salomão, Ana Cláudia
Miron, Ana Caroline
de Assis, Rafael L.
Domingues, Tomas F.
Aragão, Luiz E. O. C.
Meir, Patrick
Camargo, José Luis
Manzi, Antonio Ocimar
Nagy, Laszlo
Mercado, Lina M.
Hartley, Iain P.
Quesada, Carlos Alberto
Keywords: Science::Geology
Issue Date: 2022
Source: Cunha, H. F. V., Andersen, K. M., Lugli, L. F., Santana, F. D., Aleixo, I. F., Moraes, A. M., Garcia, S., Di Ponzio, R., Mendoza, E. O., Brum, B., Rosa, J. S., Cordeiro, A. L., Portela, B. T. T., Ribeiro, G., Coelho, S. D., de Souza, S. T., Silva, L. S., Antonieto, F., Pires, M., ...Quesada, C. A. (2022). Direct evidence for phosphorus limitation on Amazon forest productivity. Nature, 608(7923), 558-562.
Journal: Nature
Abstract: The productivity of rainforests growing on highly weathered tropical soils is expected to be limited by phosphorus availability1. Yet, controlled fertilization experiments have been unable to demonstrate a dominant role for phosphorus in controlling tropical forest net primary productivity. Recent syntheses have demonstrated that responses to nitrogen addition are as large as to phosphorus2, and adaptations to low phosphorus availability appear to enable net primary productivity to be maintained across major soil phosphorus gradients3. Thus, the extent to which phosphorus availability limits tropical forest productivity is highly uncertain. The majority of the Amazonia, however, is characterized by soils that are more depleted in phosphorus than those in which most tropical fertilization experiments have taken place2. Thus, we established a phosphorus, nitrogen and base cation addition experiment in an old growth Amazon rainforest, with a low soil phosphorus content that is representative of approximately 60% of the Amazon basin. Here we show that net primary productivity increased exclusively with phosphorus addition. After 2 years, strong responses were observed in fine root (+29%) and canopy productivity (+19%), but not stem growth. The direct evidence of phosphorus limitation of net primary productivity suggests that phosphorus availability may restrict Amazon forest responses to CO2 fertilization4, with major implications for future carbon sequestration and forest resilience to climate change.
ISSN: 0028-0836
DOI: 10.1038/s41586-022-05085-2
Schools: Asian School of the Environment 
Rights: © 2022 The Author(s), under exclusive licence to Springer Nature Limited. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ASE Journal Articles

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