Slide 1 / 129 Slide 2 / 129 2nd Grade Biodiversity and Humans 2015-11-23 www.njctl.org Slide 3 / 129 Table of Contents · Biodiversity Click on the topic to go to that section · Types of Living Things · Living Things On Land · Living Things In The Water · Biodiversity and Humans · Ecosystems and Organisms Slide 4 / 129 Biodiversity Return to Table of Contents Slide 5 / 129 Diversity When something is diverse, that means it has a large variety or lots of different types of things. Which picture shows the largest variety of fruits/veggies? Click in the blue box to check your answer. This picture has the most different types of fruits/veggies. It has the highest diversity of the three pictures. Slide 6 / 129 Diversity Tulips are beautiful flowers that bloom in the spring. Circle the tulip field that has the highest diversity?
Transcript
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2nd Grade
Biodiversity and Humans
2015-11-23
www.njctl.org
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Table of Contents
· Biodiversity
Click on the topic to go to that section
· Types of Living Things
· Living Things On Land
· Living Things In The Water
· Biodiversity and Humans
· Ecosystems and Organisms
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Biodiversity
Return to Tableof Contents
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Diversity
When something is diverse, that means it has a large variety or lots of different types of things.
Which picture shows the largest variety of fruits/veggies? Click in the blue box to check your answer.
This picture has the most different types of fruits/veggies. It has the highest diversity of the three pictures.
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DiversityTulips are beautiful flowers that bloom in the spring.
Circle the tulip field that has the highest diversity?
Biotechnology is the use of living things to create useful products.
What do you think "bio" means? Talk about it with a partner.
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Bio
Bio means life. If we combine bio with diversity, we get biodiversity.
What do you think biodiversity means?
Biodiversity is the variety of living things in an area.
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Biodiversity
Which picture shows the highest biodiversity?
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Biodiversity is HealthyAn area with higher biodiversity is healthier than an area with lower biodiversity.
Look at the pictures below. Which is the healthiest area?
Forest with one type of tree.
Forest with many different trees.
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The Earth Has An Abundance of Life!
Our planet has SO MANY organisms. We have not found them all yet! Everyday more organisms are discovered. Maybe one day you can discover a new plant or animal!
Click the leafy sea dragon to watch a video about 25 bizarre animals on Earth.
Tropical Rainforest EcosystemThe Tropical Rainforest Ecosystem is a warm, wet climate. It never gets cold enough to freeze. It can rain as much as 2 meters every year!
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Tropical Rainforest EcosystemCan you move the pictures into the correct column to show producers, consumers and decomposers?
Organisms Producers Consumers Decomposers
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Savanna EcosystemThe Savanna Ecosystem is also a hot climate. It has periods of lots of rain, followed by many months of little or no rain.
Most of the plants are grasses, with occasional trees.
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Savanna EcosystemCan you move the pictures into the correct column to show producers, consumers and decomposers?
Organisms Producers Consumers Decomposers
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Desert Ecosystem
The Desert Ecosystem is a very dry ecosystem. There is very little rain. The temperatures changes from very hot during the day to cold at night.The desert ecosystem has low diversity.
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Desert Ecosystem
Organisms Producers Consumers Decomposers
Can you move the pictures into the correct column to show producers, consumers and decomposers?
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14 All ecosystems have producers, consumers and decomposers.
True
False
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15 All decomposers are mushrooms.
True
False
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16 A hot, dry ecosystem is the ___.
A ocean
B rainforest
C desert
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Living Things In the Water
Return to Tableof Contents
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Earth is Covered in Water
The land ecosystems that you learned about cover about 30% of the Earth's surface. If this is true, then how much of the Earth's surface is covered in water?
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About 70% of the Earth is covered in water.
This includes all of the bodies of water that you learned about earlier in the year:
Earth is Covered in Water
Can you name two things about each body of water?
Rivers Oceans
Lakes/ ponds
Glaciers
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Ecosystems that are located in or by the water are called aquatic ecosystems.
Every aquatic ecosystem is filled with producers, consumers and decomposers. Can you guess which category each of these organisms fall into?
Producers in aquatic ecosystems include a variety of plants and algae (seaweed). all of these organisms use the sunlight that reaches through the water to make their own food.
Seagrass Red algae
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Aquatic Plants
Aquatic plants live in the water. They have roots, stems and leaves like land plants.
Water lilies have roots in the bottom soil and a stem that extends to the surface of the water where the leaves and flowers float.
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Algae
Algae is also called seaweed. They lack the structures found in true plants. There are many types of algae.
This algae is living on rocks in a river.
Giant kelp can grow to be 45 meters tall in the ocean!
Diatoms are algae that can only be seen with a microcope.
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19 Aquatic plants are different from algae because they have roots, stems and leaves while algae do not.
True
False
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20 ___ need sunlight to make food.
A Algae
B Aquatic plants
C Both A and B.
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Aquatic ConsumersHerbivores, omnivores and carnivores are found in all aquatic ecosystems.
What do aquatic herbivores eat?
Algae and plants
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Aquatic carnivores eat other aquatic animals.
Most fish are omnivores - they eat everything they can find.
Aquatic Consumers
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Aquatic Decomposers
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Aquatic decomposers include bacteria, fungi, worm, molluscs, and some fish and crustaceans.
Lobsters and crabs (crustaceans) Clams (molluscs)
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Ocean Ecosystem
Organisms Producers Consumers Decomposers
Can you move the pictures into the correct column to show producers, consumers and decomposers?
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21 Click the picture to watch a video about sea cucumbers. What type of animal is this?
A Producer
B Consumer
C Decomposer
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22 This triggerfish eats sea urchins, small crustraceans and algae. It is a(n) ___.
All ecosystems have producer, consumers and decomposers. How do they affect each other?
Find out in this activity!
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Ecosystems and Organisms
Return to Tableof Contents
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Ecosystems and Organisms
Earth's ecosystems are diverse. Each one has different producers, consumers and decomposers.
The organisms that live in each ecosystem have traits that allow them to survive in that specific environment.
This cactus lives in the very hot and dry desert ecosystem. To survive in this environment, it stores water in its thick stem.
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Ecosystems and Organisms The arctic hare has white fur in the winter to blend in with the snow.
In the summer, the hare has brown/grey fur to blend in with the ground.
How does this trait help the arctic hare to survive in its ecosystem?
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Ecosystems and Organisms
Manta rays are large stingrays. They can grow to be 7 meters across! Instead of lungs, manta rays have gills. As water passes over the gills, oxygen is extracted from the water.
What would happen to a manta ray if it were placed in a land ecosystem?
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Camels Versus Polar Bears
Camels live in the desert ecosystem.
Camels can go several days without food and water. Their fur helps them to blend into the sand around them. They are able to keep cool in very hot temperatures.
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Camels Versus Polar Bears
Polar bears live in the tundra ecosystem.
Polar bears have two layers of fur and a thick layer of blubber to keep them warm in very cold temperatures. They have long claws to catch food and webbed feet to swim in the water.
Camels Versus Polar BearsWould a camel survive in the arctic?
How about a polar bear in the desert?
What would happen to them?
Discuss with your group.
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24 All organisms can live in any ecosystem.
True
False
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25 What type of living things are present in all ecosystems?
A Producers
B Consumers
C Decomposers
D All of the above.
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26 Would cacti and jackrabbits be able to survive in a snowy ecosystem?
Yes
No
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Animal Teeth Activity
Different animals have different teeth depending on what type of food they eat. What type of teeth do you wish you had?
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Biodiversity and Humans
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Remember: biodiversity increases the health of an ecosystem.
Can you think of an event that would decrease the biodiversity of an ecosystem? Use the pictures as clues.
Biodiversity
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Biodiversity and Natural DisastersNatural disasters affect the biodiversity of ecosystems by destroying organisms' homes and food sources. Sometimes, organisms themselves are killed.
This is the aftermath of a hurricane. How would the local ecosystems have been affected?
Humans also have an effect on biodiversity. When we conduct activities that destroy ecosystems, we lower the biodiversity of Earth.
Can you think of any other ways that humans affect biodiversity?
Oil Spill Air pollution Water pollution
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Clearing LandSometimes, people clear an area of all trees in order to build homes or other buildings.
Would this increase or decrease the biodiversity of this area? Why?
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Clearing LandSuppose that a forest is filled with a lot of different types of trees. Squirrels live in the trees and rely on the trees for food. Hawks also live in this forest and often catch squirrels for food.
If humans cleared the forest of all the trees, how would this affect the squirrels and the hawks?
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HuntingLet's think about that same forest.
Suppose that a group of hunters came to that forest and hunted all of the hawks.
How would this affect the squirrels and trees?
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Ecosystem Changes
Any time one change is made to an ecosystem, it affects all other organisms in that ecosystem!
Can you think about what might happen if squirrels were removed from the forest?
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ConservationAlthough humans have caused a lot of biodiversity loss through our actions, we are also able to increase biodiversity. This is called conservation.
The Siberian tiger is currently endangered. Conservation efforts are helping to save this animal.
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Biodiversity and Conservation
In order to increase biodiversity, we first need to recognize how we are affecting the world around us. Next, we need to think creatively about solutions.
Although humans have destroyed this habitat, what are some things we could do to improve it?
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Cities
Cities are large areas where habitats have been removed to build structures for humans. Cities cause a loss in biodiversity.
Can you think of any solutions that would help to fix this problem?
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Roof Gardens
Some buildings have roof gardens that create new habitats for organisms.
How do roof gardens affect biodiversity?
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Wildlife Corridors
When humans build roads, they divide ecosystems in half. This can cause a loss in biodiversity.
Can you think of a solution to this problem?
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Wildlife CorridorsMany countries have built wildlife corridors. These are passages that travel over or under highways. This allows animals to cross from one side of an ecosystem to another without harm. How do these help to preserve biodiversity?
Click the picture to see wildlife corridors from around the world.
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Biodiversity and Conservation
Click below to watch a video about biodiversity and conservation.
