To resprout or not to resprout
Resprouting is a mechanism that allows individual plants to persist in disturbance-prone ecosystems. It is often considered a binary trait, defining species as resprouters or non-resprouters . Although this dichotomous classification accounts for a high proportion of the interspecific variability in resprouting, it does not account for the intraspecific variability, as not all individuals of resprouting species successfully resprout , even if they are subject to a similar disturbance. In a recent paper, we proposed a conceptual model that disaggregates the process of resprouting into three sequential steps: initial ability to resprout, resprouting vigour and post-resprouting survival . Intraspecific variability in resprouting supported the importance of: a) the pre-disturbance state of the plant (i.e. plant size and stored resources) on the initial ability to resprout and on the resprouting vigour, and b) the initial post-disturbance capacity to acquire resources (i.e., resprouting vigour) on the post-resprouting survival. The proposed three-step model of resprouting provides a mechanistic description of the factors driving intraspecific variability in resprouting.
Figure: Probability of initiating resprouting (as a function of starch concentration in roots), resprouting vigor (as a function of pre-disturbance plant size), and survival (as a function of the resprouting vigor), for Linum suffruticosum [see pictures] in the Valencia (eastern Spain). From Moreira et al. (2012)