2TTO ECOLOGY B2 feeding relationships

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

Food chains and food webs

Food chains and food webs have different groups of species:

1. Producers - organisms that produce their own energy
2. Herbivores - plant eaters
3. Carnivores - meat eaters
4. Omnivores - plant and meat eaters
   

Food chains and food webs

Example of a food chain

Food chains and web

Example of a food web

Food chains and food webs

Food chain = a diagram showing who eats who

Food web = multiple food chains that are connected

Rules of food chains and webs:

1. You always start with plants
   
2. Arrows mean 'is eaten by'
   

TROPHIC LEVELS:

- The higher up the food chain you get the larger the organisms can be.

- At each trophic level energy is lost (90%), so more organisms need to be consumed to provide enough energy.

kerboodle page 304

SOME CAN HAVE OTHER SHAPES

PRIMARY CONSUMERS ALWAYS EAT:

1. PLANTS
2. PLANKTON
3. PRODUCERS
4. SECONDARY CONSUMERS

PRODUCERS ARE ALWAYS:

1. PLANTS
2. BACTERIA
3. ANIMALS THAT CAN DO PHOTOSYNTHESIS
4. ORGANISMS THAT CAN DO PHOTOSYNTHESIS

IN A FOOD CHAIN, 80% OF ENRGY IS LOST WITH EACH TROPHIC LEVEL.

1. TRUE
2. FALSE

A PYRAMID OF NUMBERS ALWAYS HAS A PYRAMID SHAPE.

1. TRUE
2. FALSE

A PYRAMID OF ENERGY ALWAYS HAS A PYRAMID SHAPE.

1. TRUE
2. FALSE

WHAT IS THE ROLE OF THE BLUE WHALE IN THIS FOODWEB?

1. PRODUCER
2. PRIMARY CONSUMER
3. SECONDARY CONSUMER
4. TERTIARY CONSUMER

WHO IS TOP OF THE FOODCHAIN IN THIS FOODWEB?

1. LEOPARD SEAL
2. KILLERWHALE
3. BLUE WHALE
4. SEAWEED

START WORKING!!