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Ecosystems

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Daphne Bergstrom

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Cards in this guide (12)
What is upwelling

the movement of deep, cold, nutrient-rich water goes up to the surface. Up-welling can be rising of any liquid.

water moving up from the benthic zone

What is a climax community

A climax community is a stable community of a diverse number of species. The repetitive replacements of serial community's eventually leads to a establishment known as a climax community. An example can be Australia, because it is a climax forest ecosystem

Its a community in its final stage of sucession

What is a nonnative species

A species that does not normally live in an area

What is emigration

Emigration is the act of moving out of a country.

It is distinguished from Immigration that is the act of moving into a new country.

What is the allele frequency

Allele frequency is the frequency (proportion) of alleles in a population. It can be expressed as a percentage or a decimal.

For example, suppose a population has 10 individuals and there are two alleles (A and a) of a gene. Suppose the individuals are as follows:

4 AA individuals = 8 A alleles

4 Aa individuals = 4 A alleles and 4 a alleles

2 aa individuals = 4 a alleles

So there are (8 + 4) = 12 A alleles in the population and (4 + 4) = 8 a alleles in the population.

The frequency of A alleles is therefore 12/20 = 0.6 or 60%.

The frequency of a alleles is 8/20 = 0.4 or 40%.

(Notice that the total number of alleles equals 1.0 or 100%.)

How does an ecosystem change during succession

It has more biodiversity.

Which part of a lake is most likely to have no photosynthesis

Benthic zone

Which biome is highly productive all year long

Tropical Rain Forest

What way leads to competition between two species

An overlap in their niches

What type of disturbance is it if an oak tree falls in a forest kills some ants and stops grass from growing below it

That would be a minor disturbance.

A deer lives in a forest. It feeds on plants and drinks from a lake. What is the name for the forest that the deer lives in

The deers habitat

Which is a density dependent factor

Space apex

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