Chapter 5-6
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How quickly does a forest recover from a fire?
After 13 years, it can be thriving.
Establishing of a biotic or abiotic community in a barren (plantless and soilless or bare rock) habitat is called?
Primary Succession
Establishing of a community in a previously inhabited area is called?
Secondary Succession
What are the trophic levels for different parts of the food chain?
Plants level 1, herbivores level 2, primary carnivores level 3, and secondary carnivores r level 4.
What is the food chain order?
Plants, Herbivores, Primary Carnivores, and then secondary carnivores.
Plants turn inorganic compounds into what?
Organic compounds
An organism that can convert inorganic matter such as a carbon dioxide into nutritional organic matter is called?
Autotroph
Name the three heterotrophs
Herbivores, Primary Carnivores, and secondary carnivores.
What is the difference between secondary carnivores and primary carnivores?
Secondary carnivores feed on carnivores, while primary carnivores only eat herbivores.
What do heterotrophs do?
Consume organic matter and unable to produce it.
What are all the food chains in an ecosystem called?
Food web
In healthy ecosystem does P ≅ R
Yes, but P tends to exceed R a little
What do you call a food chain that’s like this: 🌿 ➡️ 🐄 ➡️ 🦈 ⬇️ ➡️💩⬅️ ⬇️⬆️ Detritivores or decomposers
Detritus food chain
What do Detritivores eat?
Excrement
What is this the Formula for: Co2 + H20 ➡️CH2O + O2
Production of organic matter from inorganic compounds
Consumed organic matter goes to?
Biomass, excretion, or Respiration
CH2O + O2 –> CO2 + H2O
Formula for where organic matter goes to
Production of organic matter from inorganic compounds using either sunlight (photosynthesis) or an oxidation-reduction reaction (chemosynthesis) as an energy source. Autotrophic production.
Primary production
Production of one kind of organic matter from some other kind of organic matter. Heterotrophic production.
Secondary Production
The efficiency with which energy is transferred from one trophic level to the next?
Ecological Efficiency
Why do ecological efficiencies tend to be higher in an aquatic system?
Most aquatic organisms are cold-blooded, and they invest less energy in supporting their body weight. I.E. no body warming.
Does biomass decrease or increase from the bottom to the top of trophic levels?
decrease
Biomass numbers for producers, first level consumers, second level consumer, and third level consumer:
100,10,1, & 1/10
Examples of biomagnification?
DDT insecticide used in farming and Japan waste containing mercury dumped into water both led to biomagnification