Global ecosystem thresholds driven by aridity

被引：780

作者：

Berdugo, Miguel ^{[1
,2
]}

Delgado-Baquerizo, Manuel ^{[1
,3
]}

Soliveres, Santiago ^{[1
,4
]}

Hernandez-Clemente, Rocio ^{[5
]}

Zhao, Yanchuang ^{[6
,7
]}

Gaitan, Juan J. ^{[8
,9
,10
]}

Gross, Nicolas ^{[11
]}

Saiz, Hugo ^{[12
]}

Maire, Vincent ^{[13
]}

Lehman, Anika ^{[14
,15
]}

Rillig, Matthias C. ^{[14
,15
]}

Sole, Ricard V. ^{[2
,16
]}

Maestre, Fernando T. ^{[1
,4
]}

机构：

[1] Univ Alicante, Inst Multidisciplinar El Estudio Medio Ramon Marg, Alicante 03690, Spain

[2] Inst Biol Evolut UPF CSIC, Barcelona 08003, Spain

[3] Univ Pablo de Olavide, Seville 41704, Spain

[4] Univ Alicante, Dept Ecol, Alicante 03690, Spain

[5] Swansea Univ, Dept Geog, Singleton Pk, Swansea SA2 8PP, W Glam, Wales

[6] Henan Univ Technol, Coll Informat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China

[7] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China

[8] INTA, CIRN, Inst Suelos, 01686 Hurlingham, Buenos Aires, DF, Argentina

[9] Univ Nacl Lujan, Dept Tecnol, RA-6700 Lujan, Buenos Aires, Argentina

[10] Natl Res Council Argentina CONICET, RA-01686 Buenos Aires, DF, Argentina

[11] UCA, VetAgro Sup, UMR Ecosyst Prairial 0874, INRAE, F-63000 Clermont Ferrand, France

[12] Univ Bern, Inst Plant Sci, CH-3013 Bern, Switzerland

[13] Univ Quebec Trois Rivieres, Dept Sci Environm, Trois Rivieres, PQ G9A 5H7, Canada

[14] Free Univ Berlin, Inst Biol, D-14195 Berlin, Germany

[15] Berlin Brandenburg Inst Adv Biodivers Res BBIB, D-14195 Berlin, Germany

[16] Santa Fe Inst, Santa Fe, NM 87501 USA

来源：

SCIENCE | 2020年 / 367卷 / 6479期

基金：

欧盟地平线“2020”; 欧洲研究理事会; 加拿大自然科学与工程研究理事会;

关键词：

PLANT ECONOMICS SPECTRUM; FUNCTIONAL TRAITS; VEGETATION COVER; REGIME SHIFTS; SOIL; CLIMATE; AVAILABILITY; FEEDBACKS; DRYLANDS; NDVI;

D O I：

10.1126/science.aay5958

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：

Aridity, which is increasing worldwide because of climate change, affects the structure and functioning of dryland ecosystems. Whether aridification leads to gradual (versus abrupt) and systemic (versus specific) ecosystem changes is largely unknown. We investigated how 20 structural and functional ecosystem attributes respond to aridity in global drylands. Aridification led to systemic and abrupt changes in multiple ecosystem attributes. These changes occurred sequentially in three phases characterized by abrupt decays in plant productivity, soil fertility, and plant cover and richness at aridity values of 0.54, 0.7, and 0.8, respectively. More than 20% of the terrestrial surface will cross one or several of these thresholds by 2100, which calls for immediate actions to minimize the negative impacts of aridification on essential ecosystem services for the more than 2 billion people living in drylands.

引用

页码：787 / +

页数：46

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