Asymmetry in above- and belowground productivity responses to N addition in a semi-arid temperate steppe
Wang, Jing1,2,3; Gao, Yingzhi4,5; Zhang, Yunhai1,6; Yang, Junjie1; Smith, Melinda D.7; Knapp, Alan K.7; Eissenstat, David M.3; Han, Xingguo1,2,8
Corresponding AuthorGao, Yingzhi( ; Han, Xingguo(
AbstractNitrogen (N) enrichment often increases aboveground net primary productivity (ANPP) of the ecosystem, but it is unclear if belowground net primary productivity (BNPP) track responses of ANPP. Moreover, the frequency of N inputs may affect primary productivity but is rarely studied. To assess the response patterns of above- and belowground productivity to rates of N addition under different addition frequencies, we manipulated the rate (0-50 g N m(-2) year(-1)) and frequency (twice vs. monthly additions per year) of NH4NO3 inputs for six consecutive years in a temperate grassland in northern China and measured ANPP and BNPP from 2012 to 2014. In the low range of N addition rates, BNPP showed the greatest negative response and ANPP showed the greatest positive responses with increases in N addition (<10 g N m(-2) year(-1)). As N addition increased beyond 10 g N m(-2) year(-1), increases in ANPP dampened and decreases in BNPP ceased altogether. The response pattern of net primary productivity (combined above- and belowground; NPP) corresponded more closely to ANPP than to BNPP. The N effects on BNPP and BNPP/NPP (f(BNPP)) were not dependent on N addition frequency in the range of N additions typically associated with N deposition. BNPP was more sensitive to N addition frequency than ANPP, especially at low rates of N addition. Our findings provide new insights into how plants regulate carbon allocation to different organs with increasing N rates and changing addition frequencies. These root response patterns, if incorporated into Earth system models, may improve the predictive power of C dynamics in dryland ecosystems in the face of global atmospheric N deposition.
Keywordaboveground net primary productivity belowground net primary productivity N deposition N response efficiency root fraction
Indexed BySCI
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Ecology ; Environmental Sciences
WOS IDWOS:000478644100009
Citation statistics
Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorGao, Yingzhi; Han, Xingguo
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA
4.Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China
5.Northeast Normal Univ, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun, Jilin, Peoples R China
6.Georgia Inst Technol, Sch Biol Sci, Atlanta, GA 30332 USA
7.Colorado State Univ, Dept Biol, Grad Degree Program Ecol, Ft Collins, CO 80523 USA
8.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jing,Gao, Yingzhi,Zhang, Yunhai,et al. Asymmetry in above- and belowground productivity responses to N addition in a semi-arid temperate steppe[J]. GLOBAL CHANGE BIOLOGY,2019,25(9):2958-2969.
APA Wang, Jing.,Gao, Yingzhi.,Zhang, Yunhai.,Yang, Junjie.,Smith, Melinda D..,...&Han, Xingguo.(2019).Asymmetry in above- and belowground productivity responses to N addition in a semi-arid temperate steppe.GLOBAL CHANGE BIOLOGY,25(9),2958-2969.
MLA Wang, Jing,et al."Asymmetry in above- and belowground productivity responses to N addition in a semi-arid temperate steppe".GLOBAL CHANGE BIOLOGY 25.9(2019):2958-2969.
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