SIZE‐SPECIFIC SENSITIVITY: APPLYING A NEW STRUCTURED POPULATION MODEL

摘要: Matrix population models require the to be divided into discrete stage classes. In many cases, especially when classes are defined by a continuous variable, such as length or mass, there no natural breakpoints, and division is artificial. The authors introduce integral projection model, which eliminates need for classes, without requiring any additional biological assumptions. Like traditional matrix model provides estimates of asymptotic growth rate, stable size distribution, reproductive values, sensitivities rate changes in vital rates. However, where represents distributions, value, step functions (constant within class), yields smooth curves each these function individual size. describe method fitting data, they apply this data on an endangered plant species, northern monkshood (Aconitum noveboracense), with individuals classified stem diameter. yield similar but values sensitive choice modelmore » avoids problem size-specific that not affected duration. These general properties will make it advantageous other populations classes.« less