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Temperate Deciduous Forest

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Mikey Fager

on 30 August 2013

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Transcript of Temperate Deciduous Forest

Enter the World of Trees
The Temperate Deciduous Forest
The trees in the temperate deciduous forest are deciduous, which means their leaves change color and fall off when its fall and winter.
Plant Adaptations
When the temperature drops, the trees cut off their supply of water to the leaves and the chlorophyll starts to decompose, therefore the color of the leaves become red or orange.
The trees go dormant during winter.
Many trees have thick bark to protect them against the cold winters.
Plants make concentrated sugar to stop water from freezing in their stems.
The warm temperatures of spring signal that it's time for plants to grow again.
There are positive and negative affects of human involvement in the temperate deciduous forest.
Human Involvement
The Positive Affects of Human Involvement:
Humans are attempting to save plant and animals by creating parks.
In these parks, humans do not interfere with the endangered species or its new habitat.
The Negative Affects of Human Involvement:
Deforestation. Thousands of trees are cut down to build homes and other buildings for humans.
Deforestation causes animals to lose their homes and die.
Shrubs, lichens, and mosses are very common plants in the temperate deciduous forest.
Animal Adaptations
• Animals spend most seasons preparing for winter
• Birds start to migrate, bears and woodchucks start to eat a lot,etc.
• Migration and hibernation are the two main adaptations in the temperate deciduous forest
The animals in the temperate deciduous forest have adapted to the harsh winter season by doing different things to get them through the winter.
These adaptations are important because if animals didn't prepare for the winter months (ex. bears hibernating, birds migrating north,etc.) then they would most likely perish in the harsh winter.
•Black Berry shrub gets pollinated by bee, and shrub gives bee nectar.(mutualism)
Relationship Among Organisms
• They black bear preys on fish and other small animals the prey receives only death (predation)
Exponential Growth is when a population size increases dramatically over time. The amount of species in that population doubles over a specific amount of time.
Population Trends
Trees such as oaks, beeches, and maples are very common in a temperate deciduous forest.
A common example of exponential growth in a temperate deciduous forest is bacteria.
Logistic Growth is when a population slows or stops growing after a period of exponential growth.
The temperate deciduous forest is greatly populated by mammals, including humans. This means that there are a lot of hosts for a parasite called a tape worm. These worms get inside the intestines of animals and consume the nutrients that the host gets for itself. This leaves the host with barely any protien to live on, and depending on the size of the animal, will cause the host to die of malnuutrition.(parasitism)
Squirrel and tree: Squirrel burrows into the tree and gets a home, while the tree is not harmed, nor does it care that the squirrel is there. (commensalism)
The cougar and the bear both have the same food source:fish and deer. This means that they both have to compete to be able to get the amount that they need to survive. (competition)
Oxygen is brought into the biome by plants. When plants are done with photosynthesis, the release oxygen as a waste into the atmosphere. Animals then take in the oxygen.
Example: Ferns complete going through photosynthesis and release oxygen. Squirrels take in the oxygen released by ferns.
Cycling o f Major Nutrients
Carbon goes through the temperate deciduous forest when plants go through photosynthesis and when animals go through cellular respiration.
Example: Wildflowers go through photosynthesis and bring carbon into the ecosystem and through food webs. A black bear would release carbon back into the environment.
Bacteria reproduces quickly, therefore each generation doubles in population.
Logistic Growth is the main population trend in the temperate deciduous.
It occurs because of lack of resources and space.
Rabbits in the temperate deciduous forest can increase in population size when there is an abundant amount of resources.
When these resources become scarce, the rabbit population can either decrease, grow at a slow rate, or stop growing all together until these resources are plentiful again.
Population Size
Oxygen and carbon depend on each other!
Nitrogen travels in the temperate deciduous biome by plants. Before the plants can take in this nitrogen, it has to get fixed by bacteria in the soil. Once the nitrogen is fixed in the soil, the plants then take it in, and the nitrogen in the plant protein goes to animal, and the nitrogen from the decayed animal goes back to the soil.
Example: Bacteria fixes the nitrogen and puts it in the soil. A shrub takes in the nitrogen from the soil, and the rabbit that eats the shrub gets the nitrogen. After that rabbit dies and decomposes, the nitrogen in the rabbit gets transferred back into the soil.
Phosphorus is created by rocks. When rocks get weathered, they become apart of the soil. Plants absorb the phosphorus from the soil, and it enters an animal's system after they have consumed the plant or another animal that consumed that plant.
Example: Grasses take up the phosphorus from the soil, and a deer eats the grass. The deer now has phosphorus in its system.
Hydrogen can enter the temperate deciduous forest by plants taking in groundwater and releasing it through transpiration. That evaporated water from plants condenses in clouds, and precipitation occurs. The rain enters the water systems and animals can drink the water.
Example: After a thunderstorm, plants absorb the water, and animals such as deer, drink the new water added to lakes, rivers, streams, ponds, etc.
Humans also cause pollution by burning fossil fuels, which releases carbon and other chemicals into the air and water systems.
This pollution affects the whole environment, including us humans!
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