@article{ca59d752b4e04c689000da8cf22e1150,
title = "Plant acclimation to long-term high nitrogen deposition in an N-rich tropical forest",
abstract = "Anthropogenic nitrogen (N) deposition has accelerated terrestrial N cycling at regional and global scales, causing nutrient imbalance in many natural and seminatural ecosystems. How added N affects ecosystems where N is already abundant, and how plants acclimate to chronic N deposition in such circumstances, remains poorly understood. Here, we conducted an experiment employing a decade of N additions to examine ecosystem responses and plant acclimation to added N in an N-rich tropical forest. We found that N additions accelerated soil acidification and reduced biologically available cations (especially Ca and Mg) in soils, but plants maintained foliar nutrient supply at least in part by increasing transpiration while decreasing soil water leaching below the rooting zone. We suggest a hypothesis that cation-deficient plants can adjust to elevated N deposition by increasing transpiration and thereby maintaining nutrient balance. This result suggests that long-term elevated N deposition can alter hydrological cycling in N-rich forest ecosystems.",
keywords = "Nutrient balance, Plant acclimation, Soil acidification, Transpiration, Water use strategy",
author = "Xiankai Lu and Vitousek, {Peter M.} and Qinggong Mao and Gilliam, {Frank S.} and Yiqi Luo and Guoyi Zhou and Xiaoming Zou and Edith Bai and Scanlon, {Todd M.} and Enqing Hou and Jiangming Mo",
note = "Funding Information: ACKNOWLEDGMENTS. We thank invaluable comments from Prof. James N. Galloway, Dr. Kabir Peay, and Y.L.{\textquoteright}s EcoLab. We also appreciate Dinghushan Forest Ecosystem Research Station for the support in the field work, and Ms. Xiaoping Pan, and Mr. Hui Mo, Lijie Deng, and Jingbin Liang for their skillful assistance in laboratory and field work. This study was funded by the National Natural Science Foundation of China (41731176, 31370498, and 31770523), the National Basic Research Program of China (2014CB954400), and Youth Innovation Promotion Association, Chinese Academy of Sciences (2015287). Funding Information: We thank invaluable comments from Prof. James N. Galloway, Dr. Kabir Peay, and Y.L.{\textquoteright}s EcoLab. We also appreciate Dinghushan Forest Ecosystem Research Station for the support in the field work, and Ms. Xiaoping Pan, and Mr. Hui Mo, Lijie Deng, and Jingbin Liang for their skillful assistance in laboratory and field work. This study was funded by the National Natural Science Foundation of China (41731176, 31370498, and 31770523), the National Basic Research Program of China (2014CB954400), and Youth Innovation Promotion Association, Chinese Academy of Sciences (2015287). Publisher Copyright: {\textcopyright} 2018 National Academy of Sciences. All rights reserved.",
year = "2018",
month = may,
day = "15",
doi = "10.1073/pnas.1720777115",
language = "English (US)",
volume = "115",
pages = "5187--5192",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
publisher = "National Academy of Sciences",
number = "20",
}