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Taha Science Isu

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Information about Taha Science Isu

Published on January 26, 2008

Author: Zishan

Source: slideshare.net

Description

A science project by Taha
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Unit 1-Sustainability of ecosystems Chapter 1 Pages 4-36

Instructions Bolded words will represent keywords in our text book so please remember to pay special attention to them Italic words will represent important words that are not considered keywords in the text book

Bolded words will represent keywords in our text book so please remember to pay special attention to them

Italic words will represent important words that are not considered keywords in the text book

Chapter 1.1 Capturing energy from the sun

Energy All organisms use energy. Energy is the fuel of ecosystems. Energy is transferred through food chains. Energy isn’t created but instead is absorbed by plants. If it wasn’t for plants this couldn’t have ever existed! - Plants Produce energy We are consumers and like most creatures we don’t make energy but instead we consume it as it moves up the food chain towards us

All organisms use energy. Energy is the fuel of ecosystems.

Energy is transferred through food chains.

Energy isn’t created but instead is absorbed by plants.

If it wasn’t for plants this couldn’t have ever existed!

- Plants Produce energy

We are consumers and like most creatures we don’t make energy but instead we consume it as it moves up the food chain towards us

All of our activities; even thinking require energy. The same goes for other organisms. An Ecosystem is an area were organisms interact with each other with their environment of energy and matter

All of our activities;

even thinking require

energy. The same goes

for other organisms.

An Ecosystem is an

area were organisms

interact with each other

with their environment

of energy and matter

Food chains Food chains are formed when organisms in ecosystems interact ex. When herbivores consume plants ( Producers ) the energy is transferred from the plants to the herbivores and when those herbivores are eaten by carnivores the energy is transferred again, I will elaborate on this topic later in this presentation

Food chains are formed when organisms in

ecosystems interact ex. When herbivores

consume plants ( Producers ) the energy is

transferred from the plants to the herbivores

and when those herbivores are eaten by

carnivores the energy is transferred again, I

will elaborate on this topic later in this

presentation

Producers, Secondary consumers & Primary consumers As mentioned earlier most producers are plants, although there are a few exceptions. Primary consumers are animals like plant eaters (herbivores) who feed on the producers directly. Secondary consumers are animals like foxes & wolves who feed on the primary consumers

As mentioned earlier most producers are plants, although there are a few exceptions.

Primary consumers are animals like plant eaters (herbivores) who feed on the producers directly.

Secondary consumers are animals like foxes & wolves who feed on the primary consumers

Chapter 1.2 Feeding levels Pages 8-17

Comparing food chains If you were to divide food chains into different levels you would set producers on one trophic level , Primary consumers would make the next and Secondary consumers would make the 3 rd . Remember that some consumers may consume organisms from more than one trophic level.

If you were to divide food chains into

different levels you would set producers on

one trophic level , Primary consumers would

make the next and Secondary consumers

would make the 3 rd .

Remember that some consumers may consume organisms from more than one trophic level.

How energy is used Most of the energy consumed by trophic consumers is used just to stay alive, however organisms need energy to complete daily activities. Useless energy is usually deposited as waste. The amount of energy that is transferred from one trophic level to the next is 5-20%, this shows how much less energy there overall would be available for creatures higher on the food chain.

Most of the energy consumed by trophic consumers is used just to stay alive, however organisms need energy to complete daily activities.

Useless energy is usually deposited as waste.

The amount of energy that is transferred from one trophic level to the next is 5-20%, this shows how much less energy there overall would be available for creatures higher on the food chain.

Pyramid of numbers

Pyramid of Biomass

Pyramid of energy flow As explained earlier energy when transferred from one tropic to the next is overall reduced, and this is the purpose of the pyramid of energy flow, to show us a comparison of energy flow in ecosystems.

As explained earlier energy when transferred from one tropic to the next is overall reduced, and this is the purpose of the pyramid of energy flow, to show us a comparison of energy flow in ecosystems.

Chapter 1.3 Populations

Population Changes in temperature, food, weather and other factors, especially human disruption all can have an effect on the population of certain species. Two types of competition between species: Intraspecific competition is competition among members of the same species Interspecific competition is competition among different species

Changes in temperature, food, weather and other factors, especially human disruption all can have an effect on the population of certain species.

Two types of competition between species:

Intraspecific competition is competition among members of the same species

Interspecific competition is competition among different species

Density Population density is a huge problem for many populations of animals. Density dependant-factors increase in significance as a population grows. Density independent-factors are very different. Instead these factors don't relate to the density of a population.

Population density is a huge problem for many populations of animals.

Density dependant-factors increase in significance as a population grows.

Density independent-factors are very different. Instead these factors don't relate to the density of a population.

Chapter 1.4 Feeding people

Agriculture Different areas have different properties that affect the productivity of those regions. When we eat wheat we get energy directly from the plants however when eat meat we usually receive energy from a place much higher in the food chain, thus there is logically less energy available for humans this way.

Different areas have different properties that affect the productivity of those regions.

When we eat wheat we get energy directly from the plants however when eat meat we usually receive energy from a place much higher in the food chain, thus there is logically less energy available for humans this way.

Quick Key terms review Ecosystem Producers Primary consumers Secondary consumers Tropic levels Detritivores Decomposers Pyramid of numbers Biomass Pyramid of Biomass Pyramid of energy flow Carrying capacity Competition Intraspecific competition Interspecific competition Population density Density-dependant factors Density-independent factors Productivity Biological magnification

Ecosystem

Producers

Primary consumers

Secondary consumers

Tropic levels

Detritivores

Decomposers

Pyramid of numbers

Biomass

Pyramid of Biomass

Pyramid of energy flow

Carrying capacity

Competition

Intraspecific competition

Interspecific competition

Population density

Density-dependant factors

Density-independent factors

Productivity

Biological magnification

Questions What are the differences between the pyramid of numbers and the pyramid of biomass?, explain with a example. What are the differences between inter and intra specific competition?

What are the differences between the pyramid of numbers and the pyramid of biomass?, explain with a example.

What are the differences between inter and intra specific competition?

The END BY: Taha Only 32 more slides! Just kidding

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