AUENV120 Lecture Notes - Lecture 4: Ghost Net, Swordfish, Thermal Expansion

• School: University of Alberta
• Department: Augustana Faculty - Environmental Studies
• Course: AUENV120
• Professor: Glen Hvenegaard

Document Summary

Bmsc (offers marine courses) in summer / fall (bamfieldmsc. com) March 1, 2018 deadline to apply for summer semester. Oceans and fisheries: alberta is a landlocked province so we do not interact with the ocean. Ocean part of a larger system ; biosphere/hydrosphere. Involved in (1) movement of matter (2) energy transformation ~ releases and absorbs. 80% of fisheries are unfortunately declining / past exploitation limits: land vs ocean. *land (1) water, light, and nutrients are the limiting factors (2) productivity increases from poles to tropics (3) biotic pyramids - reduced biomass at each trophic level. *at higher altitudes, water cools (@4 degrees0 and carries carbon and other nutrients with it. How does global warming impact this system: the day after tomorrow (movie) Fisheries production has increased from 1950 to 2004 (increase in global population = increase in consumption) *on land, we don"t usually eat predatory species such as tigers but we eat cod.