Strong interaction between plants induces circular barren patches: fairy circles

被引：59
作者：
Fernandez-Oto, C. [1 ]
Tlidi, M. [1 ]
Escaff, D. [2 ]
Clerc, M. G. [3 ]
机构：
[1] ULB, Fac Sci, B-1050 Brusslles, Belgium
[2] Univ Los Andes, Fac Ingn & Ciencias Aplicadas, Santiago, Chile
[3] Univ Chile, Dept Fis, FCFM, Santiago, Chile
来源：
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2014年 / 372卷 / 2027期
关键词：
fairy circles; localized structures; population dynamics; LOCALIZED STRUCTURES; VEGETATION PATTERNS; MYSTERIOUS CIRCLES; NAMIB DESERT; ORIGIN; FACILITATION; SOLITONS; STRIPES; MODEL;
D O I：
10.1098/rsta.2014.0009
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：
Fairy circles consist of isolated or randomly distributed circular areas devoid of any vegetation. They are observed in vast territories in southern Angola, Namibia and South Africa. We report on the formation of fairy circles, and we interpret them as localized structures with a varying plateau size as a function of the aridity. Their stabilization mechanism is attributed to a combined influence of the bistability between the bare state and the uniformly vegetation state, and Lorentzian-like non-local coupling that models the competition between plants. We show how a circular shape is formed, and how the aridity level influences the size of fairy circles. Finally, we show that the proposed mechanism is model-independent.
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页数：11
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