BIO205H5 Lecture Notes - Lecture 19: Shade Tolerance, Ice Age
Document Summary
Vancouver island: map shows why people immigrated, map shows forestry, mining, fishing wanted to attract people for these opportunities, european settlement led to environmental changes, first nation also led to env changes. Fire- the first nations used frequent fires to manage forests. What hypothesis do we test: more fire-resistant trees in pre-european time and fewer today, do the results support hypothesis yes. These changes are not due to human impacts- rather something that happened 20k yrs ago. That is when there was end of ice age so the change in ice lingering affects from ice age. So the shorelines have started to move out a meter- so every year the land increases. Cp- plants that can deal with saline water. And then you have plants that are accustomed to different habitats. This is a chronal sequences plants species as they develop through time: an late succession plant should: grow slowly. All these go back to life history events.
