Direct evidence for phosphorus limitation on Amazon forest productivity

被引：121

作者：

Viana Cunha, Hellen Fernanda ^{[1
]}

Andersen, Kelly M. ^{[2
,3
]}

Lugli, Laynara Figueiredo ^{[1
,4
]}

Santana, Flavia Delgado ^{[1
]}

Aleixo, Izabela Fonseca ^{[1
]}

Moraes, Anna Martins ^{[1
]}

Garcia, Sabrina ^{[1
]}

Di Ponzio, Raffaello ^{[5
]}

Mendoza, Erick Oblitas ^{[1
]}

Brum, Barbara ^{[1
]}

Rosa, Jessica Schmeisk ^{[1
]}

Cordeiro, Amanda L. ^{[6
]}

Tanaka Portela, Bruno Takeshi ^{[1
]}

Ribeiro, Gyovanni ^{[1
]}

Coelho, Sara Deambrozi ^{[1
]}

de Souza, Sheila Trierveiler ^{[1
]}

Silva, Lara Siebert ^{[1
]}

Antonieto, Felipe ^{[1
]}

Pires, Maria ^{[1
]}

Salomao, Ana Claudia ^{[5
]}

Miron, Ana Caroline ^{[1
,7
]}

de Assis, Rafael L. ^{[1
,8
]}

Domingues, Tomas F. ^{[9
]}

Aragao, Luiz E. O. C. ^{[3
,10
]}

Meir, Patrick ^{[11
,12
]}

Camargo, Jose Luis ^{[5
]}

Manzi, Antonio Ocimar ^{[1
,10
]}

Nagy, Laszlo ^{[13
]}

Mercado, Lina M. ^{[3
,14
]}

Hartley, Iain P. ^{[3
]}

Quesada, Carlos Alberto ^{[1
]}

机构：

[1] Natl Inst Amazonian Res, Coordinat Environm Dynam, Manaus, Amazonas, Brazil

[2] Nanyang Technol Univ, Asian Sch Environm, Singapore, Singapore

[3] Univ Exeter, Coll Life & Environm Sci, Geog, Exeter, Devon, England

[4] Tech Univ Munich, TUM Sch Life Sci, Freising Weihenstephan, Germany

[5] Natl Inst Amazonian Res, BioL Dynam Forest Fragment Project, Manaus, Amazonas, Brazil

[6] Colorado State Univ, Ft Collins, CO 80523 USA

[7] Univ Hamburg, Dept Biol, Hamburg, Germany

[8] Univ Oslo, Nat Hist Museum, Oslo, Norway

[9] Univ Sao Paulo, Fac Filosofia Ciencia & Letras Ribeirao Preto, Sao Paulo, Brazil

[10] Natl Inst Space Res, Sao Jose Dos Campos, SP, Brazil

[11] Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland

[12] Australian Natl Univ, Res Sch Biol, Canberra, ACT, Australia

[13] Univ Estadual Campinas, Sao Paulo, Brazil

[14] UK Ctr Ecol & Hydrol, Wallingford, Oxon, England

来源：

NATURE | 2022年 / 608卷 / 7923期

基金：

巴西圣保罗研究基金会; 英国自然环境研究理事会;

关键词：

NET PRIMARY PRODUCTIVITY; TERRA-FIRME FOREST; NUTRIENT LIMITATION; TREE GROWTH; RAIN-FOREST; PLANT-ROOTS; NITROGEN; CARBON; SOIL; FERTILIZATION;

D O I：

10.1038/s41586-022-05085-2

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The productivity of rainforests growing on highly weathered tropical soils is expected to be limited by phosphorus availability(1). 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 phosphorus(2), and adaptations to low phosphorus availability appear to enable net primary productivity to be maintained across major soil phosphorus gradients'. 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 place(2). 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 fertilization(4), with major implications for future carbon sequestration and forest resilience to climate change.

引用

页码：558 / +

页数：14