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Articles 2 registres trobats  
1.
4 p, 176.3 KB Analytical solution of a model for complex food webs / Camacho Castro, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Guimerà, Roger (Universitat Rovira i Virgili. Departament d'Enginyeria Química) ; Amaral, Luís A. Nunes (Boston University. Department of Physics)
We investigate numerically and analytically a recently proposed model for food webs [Nature 404, 180 (2000)] in the limit of large web sizes and sparse interaction matrices. We obtain analytical expressions for several quantities with ecological interest, in particular, the probability distributions for the number of prey and the number of predators. [...]
2002 - 10.1103/PhysRevE.65.030901
Physical review. E : Statistical, nonlinear, and soft matter physics, Vol. 65, Number 3 (February 2002) , p. 030901/1-030901/4  
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2.
4 p, 125.4 KB Robust patterns in food web structure / Camacho Castro, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Guimerà, Roger (Universitat Rovira i Virgili. Departament d'Enginyeria Química) ; Nunes Amaral, Luís A. (Boston University. Department of Physics) ; American Physical Society
We analyze the properties of seven community food webs from a variety of environments, including freshwater, marine-freshwater interfaces, and terrestrial environments. We uncover quantitative unifying patterns that describe the properties of the diverse trophic webs considered and suggest that statistical physics concepts such as scaling and universality may be useful in the description of ecosystems. [...]
2002 - 10.1103/PhysRevLett.88.228102
Physical review letters, Vol. 88, Issue 22 (May 2002) , p. 228102  
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