השוואת שיטות

	מטריצת לסלי	מודל הקרנה אינטגרלי
תחום	אקולוגיה	אקולוגיה
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1945	2000
הוגה השיטה	Patrick Leslie	Stephen Ellner and Mark Rees
סוג	structured population dynamics	size-structured population projection
מקור מכונן	Leslie, P. H. (1945). On the use of matrices in certain population mathematics. Biometrika, 33(3), 183-212.	Easterling, M. R., Ellner, S. P., & Dixon, P. M. (2000). Size-specific sensitivity: applying a new structured population model. Ecology, 81(3), 694-708.
כינויים	Leslie model, age-structured population model, matrix population model, population dynamics	IPM, continuous size structure, kernel model, size-structured population
קשורות	4	4
תקציר	The Leslie matrix is a deterministic model of age-structured population dynamics, introduced by Patrick Leslie (1945). It projects population size and structure forward in time using age-specific fertility and survival rates. A Leslie matrix encodes these vital rates in a square matrix; multiplying the matrix by a population vector yields the population's composition at the next time step. This approach enables calculation of the population's asymptotic growth rate (λ), identification of stable age structure, and sensitivity analysis—understanding which vital rates most strongly influence population growth.	Integral projection models (IPMs) are a class of structured population models that use continuous traits (size, age, height) to describe population dynamics. Introduced by Easterling and colleagues (2000) and developed extensively by Ellner, Rees, and collaborators, IPMs overcome limitations of age- or stage-structured models by treating individual traits as continuous. They use integration to project populations forward in time, making them particularly suitable for organisms with continuous size distributions or flexible developmental pathways. IPMs enable estimation of population growth rate (λ), sensitivity analysis, and projection under changing environmental conditions.