Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14541 |
How are nitrogen availability, fine-root mass, and nitrogen uptake related empirically? Implications for models and theory | |
Dybzinski, Ray1; Kelvakis, Angelo1; McCabe, John1; Panock, Samantha1; Anuchitlertchon, Kanyarak1; Vasarhelyi, Leah1; McCormack, M. Luke2; McNickle, Gordon G.3,4; Poorter, Hendrik5,6; Trinder, Clare7; Farrior, Caroline E.8 | |
2019-03-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:3页码:885-899 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany; Australia; Scotland |
英文摘要 | Understanding the effects of global change in terrestrial communities requires an understanding of how limiting resources interact with plant traits to affect productivity. Here, we focus on nitrogen and ask whether plant community nitrogen uptake rate is determined (a) by nitrogen availability alone or (b) by the product of nitrogen availability and fine-root mass. Surprisingly, this is not empirically resolved. We performed controlled microcosm experiments and reanalyzed published pot experiments and field data to determine the relationship between community-level nitrogen uptake rate, nitrogen availability, and fine-root mass for 46 unique combinations of species, nitrogen levels, and growing conditions. We found that plant community nitrogen uptake rate was unaffected by fine-root mass in 63% of cases and saturated with fine-root mass in 29% of cases (92% in total). In contrast, plant community nitrogen uptake rate was clearly affected by nitrogen availability. The results support the idea that although plants may over-proliferate fine roots for individual-level competition, it comes without an increase in community-level nitrogen uptake. The results have implications for the mechanisms included in coupled carbon-nitrogen terrestrial biosphere models (CN-TBMs) and are consistent with CN-TBMs that operate above the individual scale and omit fine-root mass in equations of nitrogen uptake rate but inconsistent with the majority of CN-TBMs, which operate above the individual scale and include fine-root mass in equations of nitrogen uptake rate. For the much smaller number of CN-TBMs that explicitly model individual-based belowground competition for nitrogen, the results suggest that the relative (not absolute) fine-root mass of competing individuals should be included in the equations that determine individual-level nitrogen uptake rates. By providing empirical data to support the assumptions used in CN-TBMs, we put their global climate change predictions on firmer ground. |
英文关键词 | competition dynamic global vegetation model fine roots game theory nitrogen over-proliferation terrestrial biosphere model |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459456700009 |
WOS关键词 | TERRESTRIAL BIOSPHERE MODELS ; NET PRIMARY PRODUCTION ; BELOW-GROUND BIOMASS ; CARBON ; PLANT ; GROWTH ; FOREST ; TEMPERATE ; CO2 ; COMPETITION |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/16786 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Loyola Univ, Inst Environm Sustainabil, Chicago, IL 60611 USA; 2.Univ Minnesota, Dept Plant & Microbial Biol, St Paul, MN 55108 USA; 3.Purdue Univ, Dept Bot & Plant Pathol, W Lafayette, IN 47907 USA; 4.Purdue Univ, Purdue Ctr Plant Biol, W Lafayette, IN 47907 USA; 5.Forschungszentrum Julich, Plant Sci IBG2, Julich, Germany; 6.Macquarie Univ, Dept Biol Sci, N Ryde, NSW, Australia; 7.Univ Aberdeen, Sch Biol Sci, Cruickshank Bldg, Aberdeen, Scotland; 8.Univ Texas Austin, Dept Integrat Biol, Austin, TX 78712 USA |
推荐引用方式 GB/T 7714 | Dybzinski, Ray,Kelvakis, Angelo,McCabe, John,et al. How are nitrogen availability, fine-root mass, and nitrogen uptake related empirically? Implications for models and theory[J]. GLOBAL CHANGE BIOLOGY,2019,25(3):885-899. |
APA | Dybzinski, Ray.,Kelvakis, Angelo.,McCabe, John.,Panock, Samantha.,Anuchitlertchon, Kanyarak.,...&Farrior, Caroline E..(2019).How are nitrogen availability, fine-root mass, and nitrogen uptake related empirically? Implications for models and theory.GLOBAL CHANGE BIOLOGY,25(3),885-899. |
MLA | Dybzinski, Ray,et al."How are nitrogen availability, fine-root mass, and nitrogen uptake related empirically? Implications for models and theory".GLOBAL CHANGE BIOLOGY 25.3(2019):885-899. |
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