Nonlinear responses of ecosystem carbon fluxes to precipitation change in a semiarid grassland
文献类型： 外文期刊
作者： Chai, Hua 1 ; Ma, Jianying 3 ; Zhang, Jinwei 4 ; Li, Junqin 2 ; Meng, Bo 2 ; Wang, Chengliang 2 ; Pan, Duofeng 5 ; Li, Jie 1 ; Sun, Wei 2 ; Zhou, Xuhui 1 ;
作者机构： 1.Northeast Forestry Univ, Sch Forestry, Sch Ecol, Key Lab Sustainable Forest Ecosyst Management Mini, Harbin, Peoples R China
2.Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol Minist Educ, Jilin Songnen Grassland Ecosyst Natl Observat & Re, Changchun, Peoples R China
3.Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun, Peoples R China
4.Northeast Agr Univ, Coll Anim Sci & Technol, Dept Grassland Sci, Harbin, Peoples R China
5.Heilongjiang Acad Agr Sci, Inst Forage & Grassland Sci, Harbin, Heilongjiang, Peoples R China
关键词： ecosystem carbon fluxes; altered precipitation; nonlinear responses; precipitation gradient; semiarid grasslands
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.8； 五年影响因子：5.7 ）
ISSN： 1664-462X
年卷期： 2025 年 16 卷
页码：
收录情况： SCI
摘要： Carbon (C) fluxes in semiarid grasslands subject to precipitation variability play a critical role in the terrestrial C cycle. However, how ecosystem C fluxes respond to variability in precipitation (both decreases and increases precipitation along a gradient) remains unclear. In this study, we conducted a three-year field experiment in a semiarid grassland, with six precipitation treatments (precipitation decreased by 70%, 50%, and 30% [P-70%, P-50%, and P-30%], natural precipitation [P+0%], and precipitation increased by 30% and 50% [P+30% and P+50%]) to examine how variations in precipitation influence ecosystem C fluxes, specifically focusing on gross ecosystem productivity (GEP), ecosystem respiration (ER), and net ecosystem CO2 exchange (NEE). We found that both decreased and increased precipitation significantly altered the GEP (from -26% to 14%), but only decreased precipitation significantly reduced the ER and NEE (from 1% to 31%), relative to their values during natural precipitation. This suggests that ecosystem C fluxes are more sensitive to decreased precipitation, and respond nonlinearly to the precipitation gradient. Furthermore, structural equation modeling indicated that the soil water content was the primary controlling factor driving changes in ecosystem C fluxes. Our research underscores the nonlinear response of ecosystem C fluxes to changes in precipitation within semiarid ecosystems, particularly their sensitivity to extreme drought. Considering this nonlinear response, it is crucial to improve dynamic models of the C cycle and predict ecosystem responses to precipitation variability.
- 相关文献
作者其他论文 更多>>
-
Comparative transcriptome analysis of differentially expressed genes of Medicago falcata L. breeding lines response to saline-alkaline stress
作者：Chai, Hua;Wang, Xiaolong;Yang, Zhao;Li, Shasha;Xu, Yanxia;Wu, Yue;Chai, Hua;Shen, ZhongBao
关键词：
Medicago falcata L.; Salt-alkali stress; RNA-seq; Transcription factor; WGCNA -
Analysis of physiological characteristics and gene co-expression networks in Medicago sativa roots under low-temperature stress
作者：Wang, Xiaolong;Chai, Hua;Xu, Yanxia;Li, Shasha;Wu, Yue;Wang, Ruoding;Yang, Zhao
关键词：
Medicago sativa ; physiological characteristics; genes; cold tolerance; correlation analysis -
Soil phosphorus availability is enhanced by nitrogen and litter addition during the growing season
作者：Zhang, Yifan;Ma, Zhenbiao;Li, Xinyang;Wu, Jinfeng;Li, Zimeng;Yang, Zhanbo;Jiang, Shicheng;Yue, Xiuquan;Li, Yanan;Wang, Deli;Liu, Jushan;Wan, Ho Yi;Pan, Duofeng
关键词：Nitrogen deposition; Phosphorus availability; Litter manipulation; Semi-arid grassland
-
Extreme drought impacts have been underestimated in grasslands and shrublands globally
作者：Smith, Melinda D.;Knapp, Alan K.;Ohlert, Timothy;Smith, Melinda D.;Knapp, Alan K.;Wilkins, Kate D.;Holdrege, Martin C.;Beard, Karen H.;Kulmatiski, Andrew;Holdrege, Martin C.;Beard, Karen H.;Kulmatiski, Andrew;Wilfahrt, Peter;Anderson, Maggie;Borer, Elizabeth T.;Isbell, Forest;Seabloom, Eric W.;Collins, Scott L.;Sala, Osvaldo E.;Jordan, Samuel;Dukes, Jeffrey S.;Phillips, Richard P.;Beier, Claus;Yahdjian, Laura;Biancari, Lucio;Bondaruk, Viviana Florencia;Onatibia, Gaston R.;Pineiro-Guerra, Juan Manuel;Gherardi, Laureano A.;Larsen, Klaus Steenberg;Fraser, Lauchlan H.;Jentsch, Anke;Niu, Yujie;Loik, Michael E.;Maestre, Fernando T.;Valdecantos, Alejandro;Maestre, Fernando T.;Gozalo, Beatriz;Maturano-Ruiz, Adrian;Valdecantos, Alejandro;Power, Sally A.;Chieppa, Jeff;Nielsen, Uffe N.;Yu, Qiang;Felton, Andrew J.;Munson, Seth M.;Luo, Yiqi;Bauerle, Taryn;Abdoli, Hamed;Abedi, Mehdi;Bahalkeh, Khadijeh;Alados, Concepcion L.;Castillo-Garcia, Miguel;Pueyo, Yolanda;Alberti, Juan;Bruschetti, Carlos Martin;Cardoni, Augusto;Daleo, Pedro;Iribarne, Oscar;Alon, Moshe;Cohen, Ofer;Sternberg, Marcelo;An, Hui;Anacker, Brian;Auge, Harald;Auge, Harald;Eisenhauer, Nico;Hoss, Daniela;Roscher, Christiane;Sunnemann, Marie;Bachle, Seton;Bachle, Seton;Bahn, Michael;Ingrisch, Johannes;Batbaatar, Amgaa;Cahill, James F., Jr.;Batbaatar, Amgaa;Bork, Edward W.;Carlyle, Cameron N.;Behn, Kai;Beil, Ilka;Kreyling, Juergen;Malyshev, Andrey V.;Blindow, Irmgard;Dahlke, Sven;Byrne, Kerry M.;Calvo, Dianela A.;Leder, Cintia V.;Peter, Guadalupe;Carbognani, Michele;Forte, T'ai G. W.;Petraglia, Alessandro;Chang, Scott X.;Cianciaruso, Marcus V.;Guidoni-Martins, Karlo G.;Nobre, Paola;Cordeiro, Amanda L.;Cusack, Daniela F.;Dietterich, Lee H.;D'Antonio, Carla M.;Dietterich, Lee H.;Doherty, Tim S.;Greenville, Aaron C.;Wardle, Glenda M.;Dubbert, Maren;Ebeling, Anne;Eisenhauer, Nico;Fischer, Felicia M.;Hoss, Daniela;Sunnemann, Marie;Hoss, Daniela;Pillar, Valerio D.;Fischer, Felicia M.;Gebauer, Tobias;Anacker, Brian;Haugum, Siri Vatso;Vandvik, Vigdis;Hautier, Yann;Hefting, Mariet;Henry, Hugh A. L.;Johnson, Yari;Kelly, Eugene F.;Kimmel, Kaitlin;Kroel-Dulay, Gyorgy;Orban, Ildiko;Kroel-Dulay, Gyorgy;Orban, Ildiko;Kubert, Angelika;Werner, Christiane;Lamb, Eric G.;Larson, Julie;O'Connor, Rory C.;Lawson, Jason;Plowes, Robert M.;Linstadter, Anja;Orban, Ildiko;Liu, Jielin;Liu, Shirong;Longo, Grisel;Loydi, Alejandro;Rodriguez, Dana Aylen;Scarfo, Maria Cecilia;Luan, Junwei;Wang, Yi;Luan, Junwei;Wang, Yi;Lubbe, Frederick Curtis;Wiehl, Georg;Mackie-Haas, Kathleen;Stampfi, Andreas;Merchant, Thomas;Metcalfe, Daniel B.;Mori, Akira S.;Mori, Akira S.;Mudongo, Edwin;Newman, Gregory S.;Souza, Lara;Nimmo, Dale;Ogaya, Roma;Penuelas, Josep;Osborne, Brooke;Otfinowski, Rafael;Partel, Meelis;Pineiro-Guerra, Juan Manuel;Peri, Pablo L.;Picon-Cochard, Catherine;Pineiro-Guerra, Juan Manuel;Ploughe, Laura W.;Portales-Reyes, Cristy;Reed, Sasha C.;Ritchie, Euan G.;Roscher, Christiane;Sanchez, Ana M.;Santo, Braulio A.;Shi, Baoku;Sun, Wei;Souza, Lara;Standish, Rachel J.;Zeiter, Michaela;Stampfi, Andreas;Zeiter, Michaela;Standish, Rachel J.;Tedder, Michelle;Thorvaldsen, Pal;Tian, Dashuan;Zhu, Juntao;Zong, Ning;Tielborger, Katja;van den Brink, Liesbeth;Vankoughnett, Mathew R.;Velle, Liv Guri;Wang, Changhui;Wei, Cunzheng;Williams, Jennifer L.;Wolf, Amelia A.;Zhang, Fawei;Zuo, Xiaoan;Zuo, Xiaoan;Gebauer, Tobias;Ploughe, Laura W.
关键词：climate extreme; Drought-Net; International Drought Experiment; productivity
-
Alfalfa with Forage Crop Rotation Alleviates Continuous Alfalfa Obstacles through Regulating Soil Enzymes and Bacterial Community Structures
作者：Xu, Yanxia;Yang, Zhao;Wang, Xiaolong;Li, Shasha;Chai, Hua;Wang, Ruoding;Liu, Zhuxiu;Liu, Xiaobing;Liu, Junjie;Shen, Zhongbao;Fu, Xuepeng
关键词：alfalfa crop rotation; continuous cropping obstacles; soil chemical properties; enzyme activities; bacterial community structure
-
Physiological characteristics and transcriptomic analyses of alfalfa root crown in wintering
作者：Wang, Xiaolong;Chai, Hua;Li, Shasha;Xu, Yanxia;Wu, Yue;Yang, Zhao;Wang, Jianli
关键词：alfalfa; cold resistance; physiological characteristics; RNA sequencing (RNA-seq); differentially expressed genes (DEGs); winter survival rate
-
Quercetin Promotes Abdominal Aortic Aneurysm Regression Through the RAGE/PI3K/AKT/mTOR Axis
作者：Yang, Xin;Wang, Ying;Xin, Guangyu;Li, Jie;Xu, Lei;Zhang, Guohua;Yang, Haotian
关键词：quercetin; RAGE; abdominal aortic aneurysm; elastase; RAGE/PI3K/AKT/mTOR
