Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL077736 |
Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts | |
Goll, D. S.1; Joetzjer, E.1,2; Huang, M.3; Ciais, P.1 | |
2018-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:16页码:8231-8240 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Peoples R China |
英文摘要 | Large uncertainties in the susceptibility of tropical forest productivity to precipitation changes hamper climate change projection. Interactions between the availabilities of water and phosphorus could theoretically either increase or decrease the susceptibility of tropical gas exchange to variation of precipitation. The inclusion of phosphorus-water interactions in a land surface model reduces the coefficient of variance, a measure of variability, of biweekly gross primary productivity by a factor of 1.5-2.3 at three tropical forest sites in Brazil, bringing it closer to estimates from eddy covariance measurements and remote sensing. Soil drought conditions are attenuated due to 8-30% lower water consumption during wet periods in presence of phosphorus limitation. When soils are dry, plant phosphorus acquisition is impaired by reduced ion mobility, despite an increase in net phosphorus mineralization. We conclude that water-phosphorus interactions cannot be omitted in analysis of the resilience of tropical ecosystems to precipitation changes. Plain Language Summary Phosphorus is an essential plant nutrient and limited availability of phosphorus in soils can negatively affect plant growth and photosynthesis. Therefore, a low soil supply of phosphorus can limit the capacity of ecosystems to draw down carbon dioxide emitted by human activities. Using model simulations for three tropical sites, we show that besides the negative effect on plant growth, low phosphorus availability can have a positive effect on photosynthesis during the dry season. The positive effect is caused by lower water consumption of plants during the preceding wet season due to an overall reduced plant growth. As the interactions between water and phosphorus availability are commonly overlooked in climate change assessment, we conclude that the susceptibility of tropical ecosystem to future changes in precipitation, and thereby the risk of a catastrophic die back of tropical vegetation, could be lower than previously estimated. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445612500041 |
WOS关键词 | INDUCED TREE MORTALITY ; FOREST STRUCTURE ; AMAZON FORESTS ; CLIMATE-CHANGE ; CARBON FLUXES ; SOIL ; NITROGEN ; NUTRIENT ; WATER ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27733 |
专题 | 气候变化 |
作者单位 | 1.IPSL LSCE CEA CNRS UVSQ Saclay, Lab Sci Climat & Environm, Gif Sur Yvette, France; 2.Univ Paul Sabatier, Lab Evolut & Diversite Biol, UMR 5174, CNRS, Toulouse, France; 3.Peking Univ, Sinofrench Inst Earth Syst Sci, Coll Urban & Environm Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Goll, D. S.,Joetzjer, E.,Huang, M.,et al. Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(16):8231-8240. |
APA | Goll, D. S.,Joetzjer, E.,Huang, M.,&Ciais, P..(2018).Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts.GEOPHYSICAL RESEARCH LETTERS,45(16),8231-8240. |
MLA | Goll, D. S.,et al."Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts".GEOPHYSICAL RESEARCH LETTERS 45.16(2018):8231-8240. |
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