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THE SILENCE OF THE FROGS Chapter 1.1.  Amphibians have been around for more than 400 million years.  Frogs and their relatives have adapted to the ice.

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Presentation on theme: "THE SILENCE OF THE FROGS Chapter 1.1.  Amphibians have been around for more than 400 million years.  Frogs and their relatives have adapted to the ice."— Presentation transcript:

1 THE SILENCE OF THE FROGS Chapter 1.1

2  Amphibians have been around for more than 400 million years.  Frogs and their relatives have adapted to the ice age and global warming.  They can be found in most ecosystems that include water.  ECOSYSTEM – is a term used to describe the relationships among the many species living in an environment and the relationship among those organisms and the non-living components of the environment.  Examples: Wetlands, marshes, deserts, lakes, oceans, forests.

3 Why are Scientists Concerned  Many believe that the health of amphibians indicates the health of the ecosystem they live in.  Amphi ( “on both sides”)  Bios ( “life” )  Meaning that Frogs have two lives – water and land

4  Frogs occupy two different ecosystems  Tadpoles – water ecosystem  Adult Frogs – Land and Forest  Since they are in two ecosystems, they are also in two FOOD CHAINS.  FOOD CHAIN – Is a step-by-step sequence linking organisms that feed on each other, starting with a food source such as a plants (producers), and continuing with animals and other living things that feed on plants and on each other (consumers)

5 All food Chains start with Sun as it’s source of energy!  PRODUCER – an organism that can make their own food to give themselves energy.  EXAMPLE: Plants, algae  CONSUMERS: an organism that must get its energy by eating another organism ( cannot make their own food )  EXAMPLE: animals

6 FROGS IN THEIR ECOSYSTEMS  What do adult frogs eat?  Insects ( mostly )  Small fish ( limited )  What animals eat frogs?  Large fish  Predatory birds  Reptiles  Small mammals

7  The adult frog is part of a food chain that includes PRODUCERS, HERBIVORES, CARNIVORES, OMNIVORES.  HERBIVORE – Organism that eat only plants  EXAMPLE : Deer, Cow  CARNIVORE – Organism that eats only animals  EXAMPLE : Hawk, Tiger

8  OMNIVORE : Organism that eats both plants and animals.  EXAMPLE: Bears, Humans  What do tadpoles eat?  Algae ( small plant-like organisms)  Both living and dead

9  The Tadpole is a herbivore, where the adult frog is a carnivore. Therefore the Tadpole is in a different food chain.  The Tadpole has two food sources:  1. producers ( algae )  2. Detritus  DETRITUS – Waste from plants and animals, including their dead remains

10  Detritus food chains are critical in the recycling of matter in ecosystems.  Decomposers are in a Detritus food chain which helps release nutrients to the soil and water. Plants and algae use those nutrients to grow.  DECOMPOSERS – An organism that gets its energy by consuming and breaking down detritus.  EXAMPLES: Bacteria, fungus

11 THE SILENCE OF THE FROGS (pg wksheet)  Questions 1-11  Food chain Handout


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