Precipitation and plant functional composition mediate desert canopy nutrient responses to water and nitrogen addition

被引:1
作者
She, Weiwei [1 ,2 ,3 ]
Zhou, Yong [4 ,5 ]
Luo, Wentao [6 ]
Bai, Yuxuan [7 ]
Feng, Wei [1 ,2 ]
Lai, Zongrui [1 ,2 ]
Qiao, Yangui [1 ]
Liu, Liang [1 ]
Zhang, Wenjin [1 ]
Miao, Lin [1 ]
Miao, Chun [1 ]
Qin, Shugao [1 ,8 ]
Zhang, Yuqing [1 ,2 ,3 ]
机构
[1] Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing 100083, Peoples R China
[2] Beijing Forestry Univ, Key Lab State Forestry Grassland Adm Soil & Water, Beijing 100083, Peoples R China
[3] Beijing Forestry Univ, State Key Lab Efficient Prod Forest Resources, Beijing 100083, Peoples R China
[4] Utah State Univ, Dept Wildland Resources, Logan, UT 84321 USA
[5] Utah State Univ, Ecol Ctr, Logan, UT 84321 USA
[6] Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China
[7] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
[8] Beijing Forestry Univ, Engn Res Ctr Forestry Ecol Engn, Minist Educ, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
Calcium carbonate; Community composition; Nitrogen deposition; Nutrient acquisition; Plant trait; Precipitation change; PHOSPHORUS; PRODUCTIVITY; METAANALYSIS; DIVERSITY;
D O I
10.1007/s11104-023-06384-x
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Background and aimsPlant nutrients play a fundamental role in regulating ecosystem functioning and are sensitive to global changes such as precipitation change and nitrogen (N) deposition. However, the mechanisms by which resource availability and community composition mediate canopy nutrients remain unclear.MethodsWe investigated soil resource availability, plant productivity, community composition and canopy nutrient status in a 6-year water and N addition experiment in a desert shrubland of northern China.ResultsWater addition overall negatively affected canopy N content but had no effect on canopy phosphorus (P) content, and these effects were mediated by ambient precipitation. In drier years, water addition reduced canopy N and P contents via decreasing shrub-herb ratio and increasing community productivity. In wetter years, higher precipitation levels weakened water effects on plant community, causing a neutral water effect on canopy N content. Furthermore, this increased precipitation intensified soil calcium leaching, which, in turn, had a positive water effect on canopy P content. Accordingly, canopy N and P contents showed negative logarithmic and concave-shaped relationships with precipitation, respectively. Nitrogen enrichment increased canopy N but reduced P content through increasing soil N availability and reducing shrub-herb ratio.ConclusionsOur results suggest that both ambient precipitation levels and plant functional composition play pivotal roles in mediating desert canopy nutrient responses to precipitation change and N deposition. Our findings also highlight the fundamental role of soil calcium in regulating plant P responses to precipitation change, which provide new insights into our understanding of biogeochemical coupling under global change.
引用
收藏
页码:609 / 621
页数:13
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