Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts
Abstract 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...
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| Format: | Article |
| Language: | English |
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Wiley
2018-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2018GL077736 |
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| author | D. S. Goll E. Joetzjer M. Huang P. Ciais |
| author_facet | D. S. Goll E. Joetzjer M. Huang P. Ciais |
| author_sort | D. S. Goll |
| collection | DOAJ |
| description | Abstract 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. |
| format | Article |
| id | doaj-art-afdf2837310a4573aca229efc02c093f |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-afdf2837310a4573aca229efc02c093f2025-08-20T02:57:52ZengWileyGeophysical Research Letters0094-82761944-80072018-08-0145168231824010.1029/2018GL077736Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to DroughtsD. S. Goll0E. Joetzjer1M. Huang2P. Ciais3Le Laboratoire des Sciences du Climat et de l'Environnement, IPSL‐LSCE CEA/CNRS/UVSQ Saclay Gif sur Yvette FranceLe Laboratoire des Sciences du Climat et de l'Environnement, IPSL‐LSCE CEA/CNRS/UVSQ Saclay Gif sur Yvette FranceSino‐French Institute for Earth System Science, College of Urban and Environmental Sciences Peking University Beijing ChinaLe Laboratoire des Sciences du Climat et de l'Environnement, IPSL‐LSCE CEA/CNRS/UVSQ Saclay Gif sur Yvette FranceAbstract 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.https://doi.org/10.1029/2018GL077736carbon cyclephosphorus cyclenutrient limitationland surface modeltropical ecosystemwater availability |
| spellingShingle | D. S. Goll E. Joetzjer M. Huang P. Ciais Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts Geophysical Research Letters carbon cycle phosphorus cycle nutrient limitation land surface model tropical ecosystem water availability |
| title | Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts |
| title_full | Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts |
| title_fullStr | Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts |
| title_full_unstemmed | Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts |
| title_short | Low Phosphorus Availability Decreases Susceptibility of Tropical Primary Productivity to Droughts |
| title_sort | low phosphorus availability decreases susceptibility of tropical primary productivity to droughts |
| topic | carbon cycle phosphorus cycle nutrient limitation land surface model tropical ecosystem water availability |
| url | https://doi.org/10.1029/2018GL077736 |
| work_keys_str_mv | AT dsgoll lowphosphorusavailabilitydecreasessusceptibilityoftropicalprimaryproductivitytodroughts AT ejoetzjer lowphosphorusavailabilitydecreasessusceptibilityoftropicalprimaryproductivitytodroughts AT mhuang lowphosphorusavailabilitydecreasessusceptibilityoftropicalprimaryproductivitytodroughts AT pciais lowphosphorusavailabilitydecreasessusceptibilityoftropicalprimaryproductivitytodroughts |