Decoupling of soil nutrient cycles as a function of aridity in global drylands

被引:808
作者
Delgado-Baquerizo, Manuel [1 ,2 ]
Maestre, Fernando T. [2 ]
Gallardol, Antonio [1 ]
Bowker, Matthew A. [3 ]
Wallenstein, Matthew D. [4 ]
Luis Quero, Jose [2 ,5 ]
Ochoa, Victoria [2 ]
Gozalo, Beatriz [2 ]
Garcia-Gomez, Miguel [2 ]
Soliveres, Santiago [2 ]
Garcia-Palacios, Pablo [4 ,6 ]
Berdugo, Miguel [2 ]
Valencia, Enrique [2 ]
Escolar, Cristina [2 ]
Arredondo, Turin [7 ]
Barraza-Zepeda, Claudia [8 ]
Bran, Donald [9 ]
Antonio Carreiral, Jose [10 ]
Chaieb, Mohamed [11 ]
Conceicao, Abel A. [12 ]
Derak, Mchich [13 ]
Eldridge, David J. [14 ]
Escudero, Adrian [2 ]
Espinosa, Carlos I. [15 ]
Gaitan, Juan [9 ]
Gatica, M. Gabriel [16 ]
Gomez-Gonzalez, Susana [17 ]
Guzman, Elizabeth [15 ]
Gutierrez, Julio R. [8 ]
Florentino, Adriana [18 ]
Hepper, Estela [19 ]
Hernandez, Rosa M. [20 ]
Huber-Sannwald, Elisabeth [7 ]
Jankju, Mohammad [21 ]
Liu, Jushan [22 ,23 ]
Mau, Rebecca L. [24 ]
Miriti, Maria [25 ]
Monerris, Jorge [26 ]
Naseri, Kamal [21 ]
Noumi, Zouhaier [11 ]
Polo, Vicente [2 ]
Prina, Anibal [19 ]
Pucheta, Eduardo [16 ]
Ramirez, Elizabeth [20 ]
Ramirez-Collantes, David A. [27 ]
Romao, Roberto [12 ]
Tighe, Matthew [28 ]
Torres, Duiio [29 ]
Torres-Diaz, Cristian [17 ]
Ungar, Eugene D. [30 ]
机构
[1] Univ Pablo Olavide, Dept Sistemas Fis Quim & Nat, Seville 41013, Spain
[2] Univ Rey Juan Carlos, Dept Biol & Geol, Area Biodiversidad & Conservac, Escuela Super Ciencias Expt & Tecnol, Mostoles 28933, Spain
[3] No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA
[4] Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA
[5] Univ Cordoba, Dept Ingn Forestal, E-14071 Cordoba, Spain
[6] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA
[7] Inst Potosino Invest Cient Tecnol, Div Ciencias Ambientales, San Luis Potosi 78210, Mexico
[8] Univ La Serena, Dept Biol, Coquimbo Region 1700000, Chile
[9] Inst Nacl Tecnol Agropecuaria, Estn Expt San Carlos Bariloche 277, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[10] Univ Jaen, Dept Biol Anim Biol Vegetal & Ecol, Jaen 23071, Spain
[11] Univ Sfax, Fac Sci, Unite Rech Plant Divers & Ecosyst Arid Environm, Sfax 3018, Tunisia
[12] Univ Estadual Feira de Santana, Dept Ciencias Biol, Bairro Novo Horizonte 44036, Feira De Santan, Brazil
[13] Direct Reg Eaux & Forets & Lutte Desertificat Rif, Tetouan 93000, Morocco
[14] Univ New S Wales, Sch Biol Earth Environm Sci, Sydney, NSW 2052, Australia
[15] Univ Tecn Particular Loja, Inst Ecol, Marcelino Champagnat, Loja, Ecuador
[16] Univ Nacl San Juan, Dept Biol, Fac Ciencias Exactas Fis & Nat, Rivadavia, San Juan, Argentina
[17] Univ Bio Bio 447, Dept Ciencias Basicas, Lab Genom & Biodiversidad, Chillan 3780000, Chile
[18] Cent Univ Venezuela, Fac Agron, Inst Edafol, Caracas 1051, Venezuela
[19] Univ Nacl La Pampa, Fac Agron, RA-6300 Santa Rosa, La Pampa, Argentina
[20] Univ Expt Simon Rodriguez, Ctr Agroecol Trop, Lab Biogeoquim, Caracas 47925, Venezuela
[21] Ferdowsi Univ Mashhad, Dept Range & Watershed Management, Fac Nat Resources & Environm, Mashhad 917751363, Iran
[22] NE Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin Province, Peoples R China
[23] Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin Province, Peoples R China
[24] No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 36011 USA
[25] Ohio State Univ, Dept Evolut Ecol & Organismal Biol, Columbus, OH 43210 USA
[26] Univ Quebec, Dept Sci Biol, Montreal, PQ H2X 3Y5, Canada
[27] Int Potato Ctr, Prod Syst & Environm Sub Program, Lima, Peru
[28] Univ New England, Sch Environm & Rural Sci, Dept Agron & Soil Sci, Armidale, NSW 2351, Australia
[29] Univ Centroccidental Lisandro Alvarado, Dept Quim & Suelos, Barquisimeto 3001, Venezuela
[30] Agr Res Org, Volcani Ctr, Inst Plant Sci, Dept Agron & Nat Resources, IL-50250 Bet Dagan, Israel
[31] Off Environm & Heritage, Buronga, NSW 2739, Australia
[32] Natl Museums Kenya, Dept Zool, Nairobi 7842000500, Kenya
[33] Agr Res Org, Dept Nat Resources & Agron, Minist Agr, IL-85280 Negev, Israel
基金
欧洲研究理事会; 美国国家科学基金会;
关键词
DISSOLVED ORGANIC NITROGEN; BIOGEOCHEMICAL CYCLES; PHOSPHORUS; CARBON; MATTER; TRANSFORMATIONS; SHRUBLANDS; RETENTION; FEEDBACKS; RESPONSES;
D O I
10.1038/nature12670
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The biogeochemical cycles of carbon (C), nitrogen (N) and phosphorus (P) are interlinked by primary production, respiration and decomposition in terrestrial ecosystems(1). It has been suggested that the C, N and P cycles could become uncoupled under rapid climate change because of the different degrees of control exerted on the supply of these elements by biological and geochemical processes(1-5). Climatic controls on biogeochemical cycles are particularly relevant in arid, semi-arid and dry sub-humid ecosystems (drylands) because their biological activity is mainly driven by water availability(6-8). The increase in aridity predicted for the twenty-first century in many drylands worldwide(9-11) may therefore threaten the balance between these cycles, differentially affecting the availability of essential nutrients(12-14). Here we evaluate how aridity affects the balance between C, N and P in soils collected from 224 dryland sites from all continents except Antarctica. We find a negative effect of aridity on the concentration of soil organic C and total N, but a positive effect on the concentration of inorganic P. Aridity is negatively related to plant cover, which may favour the dominance of physical processes such as rock weathering, a major source of P to ecosystems, over biological processes that provide more C and N, such as litter decomposition(12-14). Our findings suggest that any predicted increase in aridity with climate change will probably reduce the concentrations of N and C in global drylands, but increase that of P. These changes would uncouple the C, N and P cycles in drylands and could negatively affect the provision of key services provided by these ecosystems.
引用
收藏
页码:672 / +
页数:18
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