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CSU / Political Science / POLS 131 / What is the role of an ecosystem?

What is the role of an ecosystem?

What is the role of an ecosystem?

Description

School: Colorado State University
Department: Political Science
Course: Current World Problems
Professor: Pamela duncan
Term: Fall 2016
Tags: political science
Cost: 50
Name: EXAMM 3 POLS 131
Description: This material is for POLS 131 with Pamela Duncan
Uploaded: 11/06/2016
9 Pages 50 Views 2 Unlocks
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POLS 131: STUDY GUIDEDon't forget about the age old question of How does lymph fluid differ from blood?

Terms

  • Ecosystem - any group of plants, animals, or nonliving things interacting within their external environment OR
  • A community of organisms in a given location, along with nonbiological factors and the interactions between them.
  • Anthropocene - movement of the planet to a new era where the Earth changes due to one species (humans)
  • EROI - Energy Return of Investment
  • Sustainability - how human activity in conducted
  • If its renewable, then it's sustainable

  • CFCs - Chlorofluorocarbons
  • In air conditioning, cooling, hairspray
  • Ozone depletion
  • Pollution - a substance present within an ecosystem that doesn't belong there naturally
  • Spaceship Earth - an enclosed system, only having what you brought.
  • A system of interconnectedness

If you want to learn more check out What is the epipaleolithic?

Lecture on Ecology

  • Four Laws of Ecology
  • Everything is connected to everything else
  • Everything must go somewhere
  • Nature knows best
  • TINSTAAFL: There is no such thing as a free lunch

  • Common pool resources: a resource that everyone can use
  • Problem at international government because of sovereignty
  • I.e. air, water (atmosphere and ocean)

  • North/South Dilemma - rich versus poor states
  • Problem with the countries that are just now industrializing

  • "Free Rider" Problem - letting someone else deal with the problem and receiving the benefits
  • "Sound Science" - used to be empirical evidence now it's 100% scientific certainty
  • Precautionary Principle - when there's evidence of a problem, address it without waiting for 100% evidence

If you want to learn more check out What are the types of fossilization that we covered?

  • Elements of Ecology
  • Matter: organic or inorganic (finite)
  • Energy: sun (infinite)
  • Time

  • Producers (Plants) -> Primary Consumers (Herbivores) -> Secondary Consumers (Carnivores) -> Decomposers (Organic Matter -> Inorganic Matter) -> Producers
  • Humans disrupt this cycle with pollution

We also discuss several other topics like What conditions can psychosis occur?

Lecture on Human Population GrowthIf you want to learn more check out What is the relationship between myelin and the propagation speeds of action potentials?

  • 1 Billion: World Population
  • Slow down of population rate:
  • In industrialized countries
  • Contraceptives
  • Women opportunities
  • Urbanization

  • Carry capacity: number of a given species that ecosystems can support
  • Limits on Global Carrying Capacity for Humans

  1. Food: finite arable land
  • Irrigation, pesticides, fertilizer, GMOs
  • Consequences:
  1. Irrigation = energy
  2. Pesticides = ecosystemic
  • Oceans = overfishing
  • Loss of species (bee crash)
  • Natural disasters
  1. Finite Drinking Water
  2. Limited Absorption Capacity
  • Human generate things

  • Human survival strategies:

  • Foraging: hunter-gatherer
  • Most in balance with environment
  • Low population only

  • Pastoralism: domesticated animals
  • Supports larger population, but still-migratory
  • More environmentally damaging:
  • I.e. overgrazing, water pollution
  • Agriculturalism: domesticated plants
  • Supports large, dese population
  • More environmentally damaging:
  • Deforestation, soil leaching, water pollution

  • Industrialism: production of goods through technologies that rely on fossil fuels
  • Intensified agriculture
  • Only survival strategy that can support current population
  • Most environmentally destructive

Don't forget about the age old question of Explain how the spread of christianity in the americas was similar to the spread of buddhism in mongolia and manchuria.

Lecture on Pollution

  • Includes:
  1. presence of a substance that doesn't belong there (plastic)
  2. presence of naturally occurring substance in such great quantities that the ecosystem is unable to absorb it (carbon dioxide)

  • Air Pollution
  • Cause: burning or combustion that is associated with industrial activities
  • Concerns: Human health, crop damage, forest destruction, ozone layer, climate change—
  • International Action: bilateral, specific and limited

  • Water Pollution
  • Cause: agricultural practices, industry, sewage, run offs, landfills, mining
  • Concerns: human health, quantity for drinking, biodiversity
  • International Action: many bilateral treaties

  • Hazardous or Toxic Waste:
  • Cause: Chemicals, pesticides, heavy metals, and radioactive compound
  • Mining, drilling, chemical industry
  • They are in: landfills, surface receptacles, flushed underground, oceans, incinerated or exported.

Lethal Seas Film

  • Coral Reefs are important because they are home to ¼ of ocean species
  • Ocean activity: burning of fossil fuels, ¼ absorbed into the ocean
  • The lower the pH, the higher the acidity is
  • Problem: species are becoming deformed because of acidity
  • Antarctic and Arctic: deforming tetrapods, who are food for the sea
  • Past extinction: the great die off (96% extinct species)
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