Ecosystems
Give a specific example of a population
Examples may include:
A pack of dogs;
A gaggle of geese;
A flock of sheep;
A herd of horses
Define autotroph & heterotroph
An autotroph is an organism that produces its own food (usually from sunlight).
A heterotroph is an organism that relies on other organisms for food (it must physically ingest food).
What dispersion type has no rhyme or reason to where they are placed?
Dispersion
A specific role that a species plays within an ecosystem, including how they affect other organisms.
What is a niche.
This term is used to describe all of the populations within an ecosystem.
What is a community
What type of organism breaks down other organisms that will eventually go back into the soil.
Decomposers
What is birth rate - death rate
Growth Rate
A symbiotic relationship in which one species is helped, and the other species is neither helped nor harmed.
commensalism
The biosphere is defined as this
The portion of Earth that can sustain life!
Come up with a food chain that consists of four trophic levels.
Then, describe each level, beginning with “producer”.
Producer
Primary consumer
Secondary consumer
Tertiary Consumer
Distinguish between population size and population density.
Population size is the number of individuals in the population.
Population density in the number of individuals within a given area.
A species that has been introduced to a new ecosystem, most likely by humans, and can cause disruption in the ecological balance.
What is an invasive species?
Define Ecosystem
An ecological system consisting of the community and physical factors.
Define AND describe an energy pyramid.
An energy pyramid is a pyramid that reflects the amount of energy in the trophic levels.
It depicts the “10 percent law”, which states that 10% of energy from one trophic level is passed on to the next.
What type of growth looks like an X on a graph?
Logistic
The symbiotic relationship shared among bees and flowers.
What is mutualism.
Name and describe one process that forms ecosystems.
Two possible answers:
Primary Succession
(first growth)
-or-
Secondary Succession
(re-growth)
What is biomass and at which trophic level would you find the most biomass
...and...
Why?!?!
Biomass is the dry weight of organic matter (living tissue) in an ecosystem.
Most of the biomass is found within the 1st trophic level (the producers) because you need a lot of them to feed higher-level carnivores!
How do you determine the carrying capacity on a chart or graph?
Highest number on the chart or graph for that population
Back and forth evolutionary adjustments that can be used to explain the amazing symbiotic relationships we see today is known as this.
What is coevolution.