48 views2 pages
School
Department
Course
L04- BIO 120
New Section: Population Ecology
๎€now, we will discuss populations: collection of individuals of the same
species in the same are (N)
๎€what influences 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.
Slide 6:
Continuous growth โ€“ 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:
๎€density-independent: those that are growing unrestrained
S7- structure of typical population growth model
๎€most important: N and t ( changes with time)
๎€Nt : N at a specific time t
๎€Nt+1: N in the future
๎€Nt+1=f(Nt) [f-function]
S8- for modeling continuous pop. Growth, use calculus.
S10- pop. change from Nt to Nt+1๎€ Nt+1=Nt-D(died)+b(born)-E(emigrate)
+I(immigrate)
www.notesolution.com
Unlock document

This preview shows half of the first page of the document.
Unlock all 2 pages and 3 million more documents.

Already have an account? Log in

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)

Get access

Grade+20% OFF
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers