OBJECTIVE : In this unit we will study the different rolls and impact that the living things have on the environment. There will be a strong focus in the interaction that organisms have among themselves and the environment LIVING THINGS AND THE ENVIRONMENT
How is a cat similar and different from a fish besides the physical appearance ? el “ Gato volador ” Organisms that live in different habitats
What is an Organism ? It’s a Living thing that has (or can develop) the ability to act or function independently
Where do organisms live? They live in their habitats What is a habitat? It is the physical space that has all the propped conditions for an organism to live, and reproduce. It has to provide the necessary food and water needed to survive
Do you think that only one specie can live in a habitat? NO - many species can live in the same habitat What are species ? Species are often defined as a group of organisms capable of interbreeding and producing fertile offspring.
What is a population? Group of organisms of the same specie
C o m m u n i t y
It is a group of populations living together and interacting with each other - sharing the same food, places, shelter, water resources, etc, etc . . .
R e e F Forest
What is a community ?
Is a group of different Populations living in the same area
Giraffes population Lions population Hippopotamus population
Take a look at this place
this is the community of the Reef
What are the “ Abiotic ” factors? are the Non-Living components of an area, such as air, rocks, soil, water, climate and shelter
What are the Biotic factors? are the Living Organisms of a given area - animals, insects, bacteria, , plants and humans
if you take some Biotic factors
then choose an Abiotic factor
And put them together
> That is an Ecosystem <
LIMITING FACTORS Water and Food Weather Space
A factor or limiting resource is a factor that controls a process, such as organism growth or species population, size or distribution. The availability of food, predation pressure, hard temperatures or availability of shelter are examples of factors that could be limiting for an organism. An example of a limiting factor is sunlight, which is crucial in rainforests.
Another example is rain, which can bust an ecosystem in two ways. One way is rain can destroy an ecosystem is flood. Flooding can wash away shelter, food, and even parts of the life-form's population itself. The other way rain can destroy an ecosystem is drought. The main way it can destroy an ecosystem is the depletion of food sources.