Homework4_2006

Homework4_2006 - Homework 4 ESM 211 Due Fri. Dec. 1 The...

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Homework 4 ESM 211 Due Fri. Dec. 1 The figure below describes the lifecycle of whitebark pine, and is taken from a recently- published PVA. Our goal for this exercise is to understand this life cycle, convert it into a projection matrix, and assess the sensitivity of the growth rate to infection by blister rust. 1. First we need to make sure that we understand that tricky reproductive transition. For now, just focus on the healthy trees. And if you find yourself getting confused, that’s OK – it’s a confusing situation (and I’m not 100% sure that they did it right!). a. Does this diagram represent a pre-breeding or post-breeding census? Why? b. According to this diagram, how long do seeds remain in the ground before they germinate? Does this seem biologically reasonable? c. Is there a seed bank? d. If seeds germinated immediately (i.e., a seed produced now is a 1-year-old seedling next year) how would this diagram need to be changed to represent a pre-breeding census? A post-breeding census? 2.
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Homework4_2006 - Homework 4 ESM 211 Due Fri. Dec. 1 The...

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