Plants alter their vertical root distribution rather than biomass allocation in response to changing precipitation
文献类型：期刊论文
| 作者 | Zhang, Bingwei1,2; Cadotte, Marc W.; Chen, Shiping1,2 ; Tan, Xingru1,2; You, Cuihai1,2; Ren, Tingting1,2; Chen, Minling5; Wang, Shanshan2; Li, Weijing2; Chu, Chengjin
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| 刊名 | ECOLOGY
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| 出版日期 | 2019 |
| 卷号 | 100期号:11 |
| 关键词 | allocation optimal biomass partitioning theory precipitation change semiarid steppe species reordering vertical root distribution |
| ISSN号 | 0012-9658 |
| DOI | 10.1002/ecy.2828 |
| 文献子类 | Article |
| 英文摘要 | Elucidating the variation of allocation pattern of ecosystem net primary productivity (NPP) and its underlying mechanisms is critically important for understanding the changes of aboveground and belowground ecosystem functions. Under optimal partitioning theory, plants should allocate more NPP to the organ that acquires the most limiting resource, and this expectation has been widely used to explain and predict NPP allocation under changing precipitation. However, confirmatory evidence for this theory has mostly come from observed spatial variation in the relationship between precipitation and NPP allocation across ecosystems, rather than directly from the influences of changing precipitation on NPP allocation within systems. We performed a 6-yr five-level precipitation manipulation experiment in a semiarid steppe to test whether changes in NPP allocation can be explained by the optimal partitioning theory, and how water requirement of plant community is maintained if NPP allocation is unaltered. The 30 precipitation levels (5 levels x 6 yr) were divided into dry, nominal, and wet precipitation ranges, relative to historical precipitation variation over the past six decades. We found that NPP in both aboveground (ANPP) and belowground (BNPP) increased nonlinearly as precipitation increased, while the allocation of NPP to BNPP (f(BNPP)) showed a concave quadratic relationship with precipitation. The declined f(BNPP) as precipitation increased in the dry range supported the optimal partitioning theory. However, in the nominal range, NPP allocation was not influenced by the changed precipitation; instead, BNPP was distributed more in the surface soil horizon (0-10 cm) as precipitation increased, and conversely more in the deeper soil layers (10-30 cm) as precipitation decreased. This response in root foraging appears to be a strategy to satisfy plant water requirements and partially explains the stable NPP allocation patterns. Overall, our results suggest that plants can adjust their vertical BNPP distribution in response to drought stress, and that only under extreme drought does the optimal partitioning theory strictly apply, highlighting the context dependency of the adaption and growth of plants under changing precipitation. |
| 学科主题 | Ecology |
| 出版地 | HOBOKEN |
| 电子版国际标准刊号 | 1939-9170 |
| WOS关键词 | NET PRIMARY PRODUCTIVITY ; RAIN-USE EFFICIENCY ; GRASSLAND ; VARIABILITY ; ECOSYSTEMS ; SENSITIVITY ; LIMITATION ; DYNAMICS ; PATTERNS ; MONGOLIA |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000481255900001 |
| 出版者 | WILEY |
| 资助机构 | National Key R&D Program of China [2017YFA0604801, 2016YFC0500700, 2016YFC0500103] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41773084, 31700375] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/19591]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Sun Yat Sen Univ, Sch Life Sci, Dept Ecol, State Key Lab Biocontrol, Guangzhou 510275, Guangdong, Peoples R China 3.Jinan Univ, Coll Chinese Language & Culture, Guangzhou 510610, Guangdong, Peoples R China 4.Georgia Inst Technol, Sch Biol Sci, Atlanta, GA 30332 USA 5.Cadotte, Marc W.] Univ Toronto Scarborough, Dept Biol Sci, Toronto, ON M1C 1A4, Canada 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Bingwei,Cadotte, Marc W.,Chen, Shiping,et al. Plants alter their vertical root distribution rather than biomass allocation in response to changing precipitation[J]. ECOLOGY,2019,100(11). |
| APA | Zhang, Bingwei.,Cadotte, Marc W..,Chen, Shiping.,Tan, Xingru.,You, Cuihai.,...&Han, Xingguo.(2019).Plants alter their vertical root distribution rather than biomass allocation in response to changing precipitation.ECOLOGY,100(11). |
| MLA | Zhang, Bingwei,et al."Plants alter their vertical root distribution rather than biomass allocation in response to changing precipitation".ECOLOGY 100.11(2019). |
入库方式： OAI收割
来源：植物研究所
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