Ecology B/C

Test your knowledge of various Science Olympiad events.
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Zioly
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Re: Ecology B/C

Post by Zioly »

Simple one.

Name 5 forms of symbiosis. Give examples of each.
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Re: Ecology B/C

Post by GoofyFoofer »

Zioly wrote:Simple one.

Name 5 forms of symbiosis. Give examples of each.
1. mutualism (relationship beneficial to both organisms); an example is a bee and a flower
2. commensalism (benefits one organism, while the other is unaffected); an example is a barnacle (benefits) and a crab (unaffected)
3. parasitism (one organism, the parasite, benefits, while the other, the host, is harmed but usually not killed); an example is a tick (parasite) and dog (host)
4. predation (one organism, predator, benefits, while the other, prey, is killed); example is snake (predator) and mouse (prey)
5. competition (organisms inhibit each other's fitness, both are harmed); example is moose and deer, who compete for food/space
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Re: Ecology B/C

Post by Zioly »

GoofyFoofer wrote:
Zioly wrote:Simple one.

Name 5 forms of symbiosis. Give examples of each.
1. mutualism (relationship beneficial to both organisms); an example is a bee and a flower
2. commensalism (benefits one organism, while the other is unaffected); an example is a barnacle (benefits) and a crab (unaffected)
3. parasitism (one organism, the parasite, benefits, while the other, the host, is harmed but usually not killed); an example is a tick (parasite) and dog (host)
4. predation (one organism, predator, benefits, while the other, prey, is killed); example is snake (predator) and mouse (prey)
5. competition (organisms inhibit each other's fitness, both are harmed); example is moose and deer, who compete for food/space
All good. Your go.
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Re: Ecology B/C

Post by Zioly »

I'll go since Goofy hasn't gone in 5 days.

Another simple one.

Define Gause's competitive exclusion principle.
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Re: Ecology B/C

Post by gavinnupp »

Zioly wrote:I'll go since Goofy hasn't gone in 5 days.

Another simple one.

Define Gause's competitive exclusion principle.
no two species can occupy the same niche at the same time
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Re: Ecology B/C

Post by Zioly »

gavinnupp wrote:
Zioly wrote:I'll go since Goofy hasn't gone in 5 days.

Another simple one.

Define Gause's competitive exclusion principle.
no two species can occupy the same niche at the same time
Good job. Your go.
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Re: Ecology B/C

Post by gavinnupp »

Zioly wrote: Good job. Your go.
Under what conditions does deciduous forest occur?
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Re: Ecology B/C

Post by Zioly »

gavinnupp wrote:
Zioly wrote: Good job. Your go.
Under what conditions does deciduous forest occur?
A forest is considered deciduous when the majority of the vegetation (primarily trees) loses their leaves seasonally (usually autumn), through a process called abscission. Abscission is caused by a physiological process deciduous trees undergo when responding to a loss in gross photosynthetic production, usually from a seasonal climate change.
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Re: Ecology B/C

Post by gavinnupp »

Accurate, but under what precipitation/temperature/latitude/soil?
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Re: Ecology B/C

Post by Zioly »

gavinnupp wrote:Accurate, but under what precipitation/temperature/latitude/soil?
Well, there are multiple scenarios in which deciduous forests may occur! I'll list them both.
[b]Temperate Deciduous Forest:[/b]

-Found between 30* and 55* latitude.
-Most found between 40* and 50*.
-In Asia, temperate forests originally covered much of Japan, eastern China, Korea, and eastern Siberia.
-In western Europe, temperate deciduous forests extended from souther Scandinavia to northwester Iberia and from the British Isles through eastern Europe.
-North American temperate deciduous forests are found from the Atlantic sea coast to the Great Plain.
-In the Southern Hemisphere, temperate deciduous foretss are found in souther Chile, New Zealand, and southern Australia.

-Temperatures are not extreme, usually 0* to 30* C. Slight "hill" in the summer months. Moderate variation.
-Precipitation averages anywhere from 650mm to 3,000 mm.
-Growing season is moist and of 4 months long. Winters last from 3 to 4 months.

-Soils are usually fertile
-Usually neutral or slightly acidic.
-Rich in both organic and inorganic matter.
-Nutrient movement within deciduous forests is more dynamic than coniferous

[b]Tropical Dry Forest[/b]

-Found between 10* and 25* latitude
-In Africa, tropical dry forests are found to the north and south of the central African rain forests.
-In the Americas, tropical dry forests are the natural vegetation of extensive areas south and north of the Amazon rain forest.
-They also extend up the west coast of Central America and into North America along the west coast of Mexico.
-In Asia, they are mainly found in India and the Indochina peninsula
-Australian tropical dry forests form a band across the northeast

-Drastic season precipitation variation. 7 month of drought, with 5 months of heavy rainfall.
-Precipitation varies heavily between different forests, but typically, there is a large spike in the months of Nov. through April.
-Temperatures are consistent, with them usually being between 20* and 30* C.

-The soils are very aged and slightly acidic.
-They are slightly rich in nutrients.
-They are highly vulnerable to erosion, with the torrents of seasonal rain.

Therefore, if a temperate forest is deciduous, then the trees are as described previously and react to the dipping temperatures, while if a tropical dry forest is deciduous, the trees react more to the season droughts.
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