Ecosystems

Using your imagination, describe how the living things interact with each other, the non-living things, and the local conditions. An example is done for you.
Living vs. Living
Living vs. Non-living
Living vs.
Local Conditions
A bird builds a nest in a tree.
A bird perches on a rock.
Some birds fly south in the winter (too cold). 

Saltwater Ecosystems
Saltwater ecosystems are oceans.
Oceans cover about three –fourths of Earth's surface, so there are more saltwater ecosystems than any other.
Grassland Ecosystems
Grasslands are dry, often flat areas of land that are hot in the summer and cold in the winter.
They get more rain and snow than deserts but less that most other ecosystems.
Types of Ecosystems
An ecosystem is not defined by its geographic size; they can be very small (e.g., a rotting log) or very massive (e.g., Atlantic Ocean).


Therefore, there are many, many different ecosystems throughout the province, country and world.
Organisms and their Habitats
Some organisms can survive only in certain habitats.
For example, a polar could not find the water it needs in a desert.

What do living things get from their environments?
Many living things share their environments and its resources.
Food
Water
Oxygen
Space
Where Plants and Animals Live

Habitat is a place where plants and animals lives. It is a place where they can meet their needs.
Animals get food, water, and shelter from their habitat,



Freshwater Ecosystems
Rivers, ponds, lakes and streams have fresh water.
Lakes and rivers are closely tied. Some lakes are the source for some rivers. Important rivers, most often, originate from lakes. Some rivers end in lakes.
Since both rivers and lakes are freshwater and flow in and out of each other, they share similar characteristics and many species reside in both habitats.
Forest Ecosystems

Forest are ecosystems in which many trees grow.

Tropical Rain Forest
A tropical rain forest grows where it is hot and wet all year long.
Animals such as jaguars and monkeys live there.
How would you define a living thing?
A living thing is something that shows or has shown the signs of life. That is, anything that is either alive or dead is classified as a living thing.
All living things:
Grow
Reproduce
Move
Take in or produce food
React to things in their environment
Have cells
Have a special chemical make-up

WHAT ARE ECOSYSTEMS?
an ecosystem is a group of interacting living and nonliving things.
ECOSYSTEMS
Terms and Types
Lecture 3
Ecological Management
B.Sc. Environmental Engineering
How would you define a non-living thing?
A non-living thing is something that will never show the signs of life.
Examples:
What is the difference between a rock and a dead rabbit ?
A rock NEVER showed the signs of life and never will. A dead rabbit, however, was once alive and therefore showed the signs of life.
To distinguish between these, scientists classify living things as either dead or alive. So, the dead rabbit is actually a living thing!

Deciduous Forest
What's A Temperate Deciduous Forest Like?
One of the most interesting features of the temperate deciduous forest is its changing seasons.
The word "deciduous" means exactly what the leaves on these trees do: change color in autumn, fall off in the winter, and grow back again in the spring. This adaptation helps trees in the forest survive winter.
Where Things Live

Living things need a place to live and grow.
Fish live in water.
Birds live in trees and fly through the air.
Plants grow where there is soil, water and sun.



Types of Ecosystems
Deserts are very dry ecosystems.

Desert plants and animals can survive with very little water.
Various Terms Used in Ecosystem Explanation
The living and nonliving things that surround a living thing make up its environment.
An ecosystem is made up of all the living and nonliving things in an environment.
A group of organisms of the same kind living in the same place is a population.
All the population that live in an ecosystem at the same time form a community.
All members of a community live in the same ecosystem but they do not all live in the same part of the ecosystem.



An organism is
any living thing.
Adaptations are…
Inherited characteristics that help organisms survive in their environment.
An habitat is..
The particular place that an organism lives.
Biotic Factors are…
The living parts of an organism's environment.
Abiotic Factors are…
The non-living parts of an organism's environment.


Various Terms Used in Ecosystem Explanation
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