Knowledge Management System Of Institute Of Botany,CAS
| Nutrient reallocation between stem and leaf drives grazed grassland degradation in inner Mongolia, China | |
| Liu, Jiayue1; Lu, Shuaizhi2; Liu, Changcheng2; Hou, Dongjie3 | |
| 2022 | |
| 发表期刊 | BMC PLANT BIOLOGY
 |
| ISSN | 1471-2229 |
| 卷号 | 22期号:1 |
| 摘要 | Background Decline in height and aboveground biomass of the plant community are critical indicators of grassland ecosystem degradation. Nutrient reallocation induced by grazing occurs among different organs, which balances the trade-off between growth and defense. However, it is not yet clear how nutrient reallocation strategies affect plant community structure and functions in grazed grasslands. A grazing experiment was conducted in a typical steppe in Inner Mongolia, China. We investigated plant community characteristics and measured plant functional traits of dominant species (Leymus chinensis and Cleistogenes squarrosa) at individual and population levels. Carbon (C), nitrogen (N), phosphorus (P), copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn) concentrations of stem and leaf in the two species were also determined. Results N, P, Cu, Fe, Mn, and Zn concentrations in leaves and stems of L. chinensis and C. squarrosa significantly increased with grazing intensity, and microelements (Cu, Fe, Mn, and Zn) were more sensitive to grazing. The nutrient slopes of macro- and microelements in leaves were significantly higher than those in stems under grazing, indicating that nutrient resources were preferentially allocated to leaves and enhanced the compensatory growth of leaves in the grazed grassland. With increasing grazing intensity, the aboveground biomass of stems and leaves in the two species significantly decreased, but leaf to stem ratio increased at the individual level, indicating that plants preferentially allocated biomass to leaves under grazing. The increase in leaf to stem ratio due to nutrient reallocation between the two organs significantly reduced height and aboveground biomass at population and community levels, driving grassland ecosystem degradation. Conclusion Our study revealed the driving forces of community structure and function degradation in grazed grasslands from the perspective of nutrient resource allocation, and provided insights into plant adaptation strategies to grazing. |
| 关键词 | Grazing Macroelements Microelements Nutrient reallocation Steppe |
| 学科领域 | Plant Sciences |
| DOI | 10.1186/s12870-022-03875-4 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | LEYMUS-CHINENSIS ; FUNCTIONAL DIVERSITY ; SEMIARID GRASSLAND ; STRATEGIES ; MANAGEMENT ; RESPONSES ; WATER ; ZN ; FE ; CU |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| WOS记录号 | WOS:000876309300001 |
| 出版者 | BMC |
| 文献子类 | Article |
| 出版地 | LONDON |
| 资助机构 | Inner Mongolia Agricultural University high-level talents research launch project [NDYB2020-2] ; Major Program of National Natural Science Foundation of China [32192463] ; Scientific and Technological Transformative Project in Inner Mongolia Autonomous Region [2020CG0013] |
| 作者邮箱 | houdongjie01@126.com |
| 作品OA属性 | Green Published, gold |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/28831 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Inner Mongolia Univ, Sch Ecol & Environm, Minist Educ, Key Lab Ecol & Resource Use Mongolian Plateau, Hohhot 010021, Peoples R China 2.Inner Mongolia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab Grassland Ecol, Hohhot 010021, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Inner Mongolia Agr Univ, Coll Grassland Resource & Environm, Hohhot 010019, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jiayue,Lu, Shuaizhi,Liu, Changcheng,et al. Nutrient reallocation between stem and leaf drives grazed grassland degradation in inner Mongolia, China[J]. BMC PLANT BIOLOGY,2022,22(1). |
| APA | Liu, Jiayue,Lu, Shuaizhi,Liu, Changcheng,&Hou, Dongjie.(2022).Nutrient reallocation between stem and leaf drives grazed grassland degradation in inner Mongolia, China.BMC PLANT BIOLOGY,22(1). |
| MLA | Liu, Jiayue,et al."Nutrient reallocation between stem and leaf drives grazed grassland degradation in inner Mongolia, China".BMC PLANT BIOLOGY 22.1(2022). |
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