BIO120H1 Lecture : lecture note

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: Ingrid L.Stefanovic

Document Summary

now, we will discuss populations: collection of individuals of the same species in the same are (n) unlike humans, some plants have unusual reproduction ( see larkspur and aspen on slides) larkspur- normal, one seed produces many identical plants. aspen- many unique seeds that produce many unique plants. dandelions- no sex, identical seeds as mother, produces many identical flowers. strangler fig- starts as an epiphyte[canopy], bring down roots to the ground, and once they are big enough and many, the roots start to come together, and look more like a tree. Continuous growth such as humans, babies are born throughout the year. Discrete growth- birds for instance have babies at specific times in a year two models: density-dependant: most important: n and t ( changes with time) nt : n at a specific time t. S10- pop. change from nt to nt+1 nt+1=nt-d(died)+b(born)-e(emigrate)