Biodiversity And Biological Magnification
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Launch Launch Using the words Using the words producer producer , , herbivore herbivore and and carnivore carnivore , rank them in order of energy from , rank them in order of energy from greatest to least energy. greatest to least energy. Besides getting their chemical energy, what Besides getting their chemical energy, what other molecule do primary consumers get from other molecule do primary consumers get from eating producers. eating producers. Are energy and nutrients recycled in an Are energy and nutrients recycled in an ecosystem? ecosystem? Which action by humans has had the most Which action by humans has had the most positive positive ecological impact on the environment? ecological impact on the environment? A. Introduction of snakes to the Hawaiian islands A. Introduction of snakes to the Hawaiian islands B. Slash and burn farming for agriculture B. Slash and burn farming for agriculture C. Hunting of wolves to increase deer populations C. Hunting of wolves to increase deer populations D. Preserving old growth forests D. Preserving old growth forests
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Transcript of Biodiversity And Biological Magnification
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Using the words Using the words producerproducer, , herbivoreherbivore and and carnivorecarnivore, , rank them in order of energy from greatest to least rank them in order of energy from greatest to least energy. energy.
Besides getting their chemical energy, what other Besides getting their chemical energy, what other molecule do primary consumers get from eating molecule do primary consumers get from eating producers.producers.
Are energy and nutrients recycled in an ecosystem?Are energy and nutrients recycled in an ecosystem? Which action by humans has had the most Which action by humans has had the most positivepositive
ecological impact on the environment?ecological impact on the environment?A. Introduction of snakes to the Hawaiian islandsA. Introduction of snakes to the Hawaiian islandsB. Slash and burn farming for agricultureB. Slash and burn farming for agricultureC. Hunting of wolves to increase deer populationsC. Hunting of wolves to increase deer populationsD. Preserving old growth forestsD. Preserving old growth forests
LaunchLaunch Using the words Using the words producerproducer, , herbivoreherbivore and and carnivorecarnivore, ,
rank them in order of energy from greatest to least rank them in order of energy from greatest to least energy. energy. Producer Producer Herbivore Herbivore Carnivore Carnivore
Besides getting their chemical energy, what other Besides getting their chemical energy, what other molecule do primary consumers get from eating molecule do primary consumers get from eating producers.producers. Nitrogen!Nitrogen!
Are energy and nutrients recycled in an ecosystem?Are energy and nutrients recycled in an ecosystem? No!No!
Which action by humans has had the most Which action by humans has had the most positivepositive ecological impact on the environment?ecological impact on the environment?
D. Preserving old growth forestsD. Preserving old growth forests
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Biodiversity and Biological MagnificationBiodiversity and Biological Magnification
Biodiversity!Biodiversity!
Variety of life in an areaVariety of life in an area Why is it important to us?Why is it important to us? Because we are part of complex food Because we are part of complex food
webs and energy cycles that all webs and energy cycles that all organisms share so decrease in organisms share so decrease in biodiversity affects us too!biodiversity affects us too!
MagnificationMagnification
To make biggerTo make bigger
Biological MagnificationBiological Magnification
is a process where certain substances is a process where certain substances such as pesticides or heavy metals move such as pesticides or heavy metals move up the food chain and become more and up the food chain and become more and more concentrated (potent) as they move more concentrated (potent) as they move up from organism to organism in the food up from organism to organism in the food chain. chain.
Biological MagnificationBiological Magnification
In food chains, webs, and pyramids: In food chains, webs, and pyramids: the the lowerlower the trophic level, the the trophic level, the less less amount of biological magnification that amount of biological magnification that has occurred. The has occurred. The higherhigher the trophic the trophic level, the level, the more more biological magnification biological magnification that has occurred. that has occurred.
The DDT The DDT exampleexample
DDT was a pesticide used DDT was a pesticide used mainly to kill mosquitoes and mainly to kill mosquitoes and pests that ruined crops (had a pests that ruined crops (had a positive impact)positive impact)
But what happened as DDT But what happened as DDT was used more often? The was used more often? The Bald Eagle was going extinct.Bald Eagle was going extinct.
Why? DDT ruined the bird’s Why? DDT ruined the bird’s egg shells. No new eagles.egg shells. No new eagles.
Why eagles? They were at Why eagles? They were at the top of the food chain- the top of the food chain- more pollution for them. more pollution for them.
Energy PyramidsEnergy Pyramids
Energy decreases are you go up trophic Energy decreases are you go up trophic levelslevels
Biological Magnification (chemicals) Biological Magnification (chemicals) increases as you up trophic levelsincreases as you up trophic levels
Quick Question!Quick Question! Which animal will have Which animal will have
accumulated more accumulated more pollution?pollution?
The iguana (lizard) OR the snailThe iguana (lizard) OR the snail
Which animal will have Which animal will have the most pollution in the most pollution in their bodies?their bodies?
