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CU / International Studies / INTL 2061 / What is biotic interaction?

What is biotic interaction?

What is biotic interaction?

Description

School: University of Colorado
Department: International Studies
Course: General Biology 2
Professor: Cheri jones
Term: Spring 2016
Tags:
Cost: 50
Name: Biology 2061 Chapters 43, 44, 46 Study Guide
Description: These notes cover all of the material that will be on the exam, Ecology, Population Ecology, and Ecosystem ecology. I've also included a link to my quizlet flashcards which have over 100 of the important terminology and questions. These notes have diagrams and images of terminology as well.
Uploaded: 04/01/2016
39 Pages 38 Views 5 Unlocks
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ECOLOGY Don't forget about the age old question of What is the material equivalence?

Chapter 43

• ****Exam 3 will cover: chapters 43, 44, 46.1 & 46.2If you want to learn more check out What is the humoral immune response?

Ecology: study of interactions among organisms and between organisms and their environment.

  • Biotic interactions are between organisms and their nonliving environment.
  • Abiotic interactions are between organisms and their nonliving environment.
  • The word ecology is based on the word root "oikos", which means house.
  • Ecology is closely related with studies of biodiversity, evolution, and biogeography--past and current distributions of life.
  • Ecology can be studied at several scales

If you want to learn more check out Who is donald hebb?

An introduction to Ecology and Biomes

  • Populations are the basic unit of evolution.
  • Communities form ecosystems.
  • Ecosystems form the biosphere.
  • Biosphere: every place on Earth where life occurs on Earth.
  • Both distribution patterns and abundance of a species are limited by physical features of the environment.

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

These physical factors include:

  1. Temperature
  2. Wind
  3. Availability of water
  4. Availability of light
  5. Salinity орн
  6. Temperature: the most important factor in the distribution of organisms.
  • It is so important because some animals are endothermic, some are ectothermic.
  • Maintaining homeostasis as far as body temperature is vital.
  • Most organisms are unable to regulate body temperature (T.) precisely, so they are impacted by environmental temperature.
  • Example, (may be on exam): coral reef organisms are abundant only in warm water; cold water limits skeleton formation. Coral reefs are only abundant in warm water because they secrete a calcium carbonate skeleton, which in warm water, the formation of corals are accelerated. Thus, they are limited and cannot exist in warm water.

We also discuss several other topics like When did agriculture begin?

  • Proteins are impacted by temperature.
  • Neurological damage can occur from high fevers. They can denature (breakdown) in high temperatures.
  • Enzymes are also denatured by high temperature.
  • Biological processes occur slower due to temperature change in organisms.
  • Another macromolecule which is impacted by organisms are lipids.
  • Plasma membranes start to break down when temperatures rise.

  • Low temperature limitations

  • Frost is the most important factor limiting distribution (geographical) of tropical and subtropical plants.
  • Cells can actually rupture if the water they contain is frozen, which will inevitably kill the plant.
  • Example: cactus distribution limited to where the temperature does not remain below freezing for more than one night.
  • The ranges of even endothermic (endothermic animals are bird and mammals, maintaining body temperature through metabolic rates) animals are affected by temperature.
  • Eastern phoebe range is limited due to the energy demands of low temperatures.

  • High temperature limitations

  • High temperatures are also limiting---why?
  • Example: corals expel symbiotic algae when temperatures are too high (bleaching). o Corals can be limited by high temps: this will result in coral bleaching, caused by the symbiotic algae which lives within the coral to be expelled or killed, causing the color to turn white.
  • Extra information: Other organisms, such as Sequoia Trees in the southeast U.S depend on small regulated fires because their seeds are sealed by pine resin until the heat of the fire melts them open to release seeds and clear out competing vegetation at the base of the tree so the seeds can grow.

Don't forget about the age old question of What is the meaning of thiomargarita namibiensis?

  • Greenhouse effect

Without the greenhouse effect, life would not exist on Earth o Solar radiation passes through the atmosphere and heats the earth's surface

  • Solar radiation comes into the atmosphere as in short wave radiation to heat up the earth.
  • Energy radiated from Earth back into the atmosphere.
  • Long-wave infrared radiation is radiated from Earth in order to heat the surface.
  • Just enough-essential.
  • Too much= dangerous
  • Greenhouse gases absorb much of this energy and reflect it back to earth.
  • Temperature increases further. Infrared energy is absorbed by atmospheric gases.

These gases:

  1. water vapor,
  2. CO2, methane,
  3. nitrous oxide,
  4. and chlorofluorocarbons.

• These gases make up less than 1% of the total volume of the atmosphere.

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