Ai S, Sadhu S (2020) The entry-exit theorem and relaxation oscillations in slow-fast planar systems. J Diff Equ 268:7220–7249
Albizuri JU, Desroches M, Krupa M, Rodrigues S (2020) Inflection, canards and folded singularities in excitable systems: application to a 3D FitzHugh - Nagumo model. J Nonlinear Sci 30:3265–3291
Baer SM, Erneux T (1986) Singular Hopf bifurcation to relaxation oscillations. SIAM J Appl Math 46:721–739
Baumgartner TR, Soutar A, Bartrina V (1992) Reconstruction of the history of Pacific sardine and Northern anchovy populations over the past two millennia from sediments of the Santa Barbara basin, California. CalCOFl Rep 33:24–40
Berglund N, Landon D (2012) Mixed-mode oscillations and interspike interval statistics in the stochastic FitzHugh - Nagumo model. Nonlinearity 25:2303–2335
Braaksma B (1998) Singular Hopf bifurcation in systems with fast and slow variables. J Nonlinear Sci 8(5):457–490
Brøns BM, Krupa M, Wechselberger M (2006) Mixed mode oscillations due to the generalized canard phenomenon, fields institute. Communications 49:39–63
Deng B (2001) Food chain chaos due to junction-fold point. Chaos 11:514–525
Deng B, Hines G (2002) Food chain chaos due to Shilnikov’s orbit. Chaos 12:533–538
Desroches M, Guckenheimer J, Krauskopf B, Kuehn C, Osinga HM, Wechselberger M (2012) Mixed-mode oscillations with multiple time scales. SIAM Rev 54:211–288
Desroches M, Krupa M, Rodrigues S (2013) Inflection canards and excitability threshold in neuronal models. J Math Biol 67:989–1017
Esper J, Bun̈tgen U, Frank DC, Nievergelt D, Liebhold A (2007) 1200 years of regular outbreaks in alpine insects. Proc R Soc B 274:671–679
Guckenheimer J (2008) Singular Hopf bifurcation in systems with two slow variables. SIAM J Appl Dyn Syst 7:1355–1377
Guckenheimer J, Holmes P (1983) Nonlinear oscillations, dynamical systems and bifurcations of vector fields. Springer-Verlag, Berlin
Guckenheimer J, Harris-Warrick R, Peck J, Willms AR (1997) Bifurcation, bursting, and spike frequency adaptation. J Comput Neurosci 4:257–277
Hastings A (2004) Transients: the key to long-term ecological understanding? Trends Ecol Evol 19(1):39–45
Hastings A, Abbott KC, Cuddington K, Francis T, Gellner G, Lai Y-C, Morozov A, Petrovskii S, Scranton K, Zeeman ML (2018) Transient phenomena in ecology. Science 361(6406):eaat6412
Krupa M, Popović N, Kopell N (2008) Mixed-mode oscillations in three time-scale systems: a prototypical example. SIAM J Appl Dyn Syst 7:361–420
Krupa M, Szmolyan P (2001) Relaxation oscillations and canard explosion. J Diff Equ 174:312–368
Krupa M, Szmolyan P (2001) Extending geometric singular perturbation theory to nonhyperbolic points - fold and canard points in two dimensions. SIAM J Math Anal 33(2):286–314
Krupa M, Wechselberger M (2010) Local analysis near a folded saddle- node singularity. J Diff Equ 248(2):2841–2888
Kuehn C (2015) Multiple time scale dynamics. Springer, NewYork
Kuwamura M, Chiba H (2009) Mixed-mode oscillations and chaos in a prey-predator system with dormancy of predators. Chaos 19:1–10
Kuznetsov YA (1998) Elements of applied bifurcation theory. Springer, NewYork
Liu W, Xiao D, Yi Y (2003) Relaxation oscillations in a class of predator-prey systems. J Diff Equ 188:30–331
Mujica J, Krauskopf B, Osinga HM (2018) Tangencies between global invariant manifolds and slow manifolds near a singular Hopf bifurcation. SIAM J Appl Dyn Syst 17(2):1395–1431
Muratori S, Rinaldi S (1989) Remarks on competitive coexistence. SIAM J Appl Math 49:1462–1472
Peet AB, Deutsch PA, Peacock - Lopez E (2005) Complex dynamics in a three-level trophic system with intraspecies interaction. J Theor Biol 232:491–503
Prescott SA, De Koninck Y, Sejnowski TJ (2008) Biophysical basis for three distinct dynamical mechanisms of action potential initiation. PLoS Comput Biol 4(10):e1000198
Rinaldi S, Muratori S (1992) Slow-fast limit cycles in predator-prey models. Ecol Modell 61:287–308
Sadhu S (2017) Stochasticity induced mixed-mode oscillations and distribution of recurrent outbreaks in an ecosystem. Chaos 27(3):033108
Sadhu S, Chakraborty Thakur S (2017) Uncertainty and predictability in population dynamics of a two-trophic ecological model: mixed-mode oscillations, bistability and sensitivity to parameters. Ecol Complex 32:196–208
Sadhu S, Kuehn C (2018) Stochastic mixed-mode oscillations in a three-species predator-prey model. Chaos 28(3):033606
Sadhu S (2021) Complex oscillatory patterns near singular Hopf bifurcation in a two-timescale ecosystem. Discret Contin Dyn Syst B 26(10):5251–5279
Scheffer M, Carpenter SR (2003) Catastrophic regime shifts in ecosystems: linking theory to observation. Trends Ecol Evol 18:648–656
Scheffer M (2009) Critical transitions in nature and society, vol 16. Princeton University Press, New Jersey
Szmolyan P, Wechselberger M (2001) Canards in \(\mathbb{R} ^3\). J Diff Equ 177:419–453