Textbook Notes (367,974)
Canada (161,538)
Biology (600)
BIO220H1 (56)
Chapter 1

Lab Chapter 1 Eutrophication Notes

2 Pages
131 Views
Unlock Document

Department
Biology
Course
BIO220H1
Professor
Doug Thomson
Semester
Winter

Description
BIO220 Lab Chapter 1 Eutrophication Notes • Eutrophication, results from continuous pollution in the form of agricultural run- off or sewage outflows. • High in N, P; essential for plant growth • Concentrations are increased to high levels, primary production can explode, resulting in eutrophication • N eutrophication in inshore marine waters, P eutrophication in freshwater systems • First stage: algal bloom; algae exponential growth, organisms that feed on algae also increase in number • Decomposition  low oxygen levels, high carbon dioxide, detrimental to aquatic organisms that require oxygen. Dead organisms, most noticeably, fish. • Oxygen levels still high, green algae common. When oxygen levels decrease, blue- green algae, cyanobacteria (tolerant to low oxygen) produce a lot of toxic compounds. Salvinia molesta • Asexual, bud off from parent Conductivity • Dissolved ions, indirect measure of salinity, detecting chloride ions from salt. • Greater conductivity, greater amount of ions • Polluted waters higher conductivity Dissolved oxygen • Over-fertilization reduce oxygen levels in aquatic environments. • When plants die, they become food for bacteria, multiply and use large amounts of oxygen Nitrate • Nitrogen cycle: bacteria break down toxic ammonium waste into nitrite and then into nitrate • Nitrates essential for plant growth: major ingredient of farm fertilizer • Nitrates stimulate growth of plankton and aquatic plants that provide food and habitat for fish, these fish populations may increase. • If algal growth is excessive, oxygen levels will be reduced and fish will die PH • Affected by its age and chemicals
More Less

Related notes for BIO220H1

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit