TY - JOUR
T1 - Quantitative analysis of competition models
AU - Chiralt, Cristina
AU - Ferragut, Antoni
AU - Gasull, Armengol
AU - Vindel, Pura
PY - 2017/12/1
Y1 - 2017/12/1
N2 - © 2017 Elsevier Ltd We study a 2-species Lotka–Volterra type differential system, modeling competition between two species and having a coexistence equilibrium in the first quadrant. In case that this equilibrium is of saddle type, its stable manifold divides the first quadrant into two zones. Then, depending on the zone where the initial condition lies, one of the species will extinct and the other will go to an equilibrium. Using this separatrix we introduce a measure to discern which species has more chance of surviving. This measure is given by a non-negative real number κ that we will call persistence ratio, that only depends on the parameters of the system. In some cases, we can give simple explicit expressions for κ. When this is not possible, we use several dynamical tools to obtain effective approximations of it.
AB - © 2017 Elsevier Ltd We study a 2-species Lotka–Volterra type differential system, modeling competition between two species and having a coexistence equilibrium in the first quadrant. In case that this equilibrium is of saddle type, its stable manifold divides the first quadrant into two zones. Then, depending on the zone where the initial condition lies, one of the species will extinct and the other will go to an equilibrium. Using this separatrix we introduce a measure to discern which species has more chance of surviving. This measure is given by a non-negative real number κ that we will call persistence ratio, that only depends on the parameters of the system. In some cases, we can give simple explicit expressions for κ. When this is not possible, we use several dynamical tools to obtain effective approximations of it.
KW - Algebraic approximation
KW - Invariant algebraic curve
KW - Lotka–Volterra differential system
KW - Separatrix
UR - https://ddd.uab.cat/record/182518
U2 - https://doi.org/10.1016/j.nonrwa.2017.06.001
DO - https://doi.org/10.1016/j.nonrwa.2017.06.001
M3 - Article
VL - 38
SP - 327
EP - 347
JO - Nonlinear Analysis: Real World Applications
JF - Nonlinear Analysis: Real World Applications
SN - 1468-1218
ER -