SUSTAINABLE ECOSYSTEMS

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Presentation transcript:

SUSTAINABLE ECOSYSTEMS

Before We Start Hand in: Hand Back: Quadrat Lab Ecological Pyramids Worksheet Ions Worksheet/Signed Tests! Hand Back: Quadrats (for complete groups!)

Human Impacts and Populations

What are five factors that humans affect the environment?

Impact #1: Habitat Change

It affects the top predators the most. Impact #1: Habitat Loss Habitat fragmentation is a kind of habitat change. It affects the top predators the most.

Impact #2: Overexploitation Overexploitation results in the extinction of one species, collapsing the food chain.

Impact #3: Climate Change Climate change is when the long-term conditions in an area change (ex. it gets hotter). The polar ice caps are melting, causing polar bears to drown.

Impact #3: Climate Change This food chain has totally collapsed due to the effects of climate change on the ice caps.

Impact #4: Pollution Pollution is special because it usually kills the top predator first, through biomagnification. Biomagnification is the accumulation of poisons in the higher trophic levels. 1 ppm/blade 30 ppm/mouse 120 ppm/snake 360 ppm/eagle

Impact #5: Invasive Species Invasive species change populations by outcompeting local native species. What is Competition? We are left with a totally different food web and two animals are extinct.

Instructions are on the board. Human Impacts Jigsaw Instructions are on the board.

Meet in your groups (on the board) Human Impacts Jigsaw Meet in your groups (on the board) at the back tables. Use the infographics to fill out the sheet you have been given. You will be the “expert” on this topic. Next day we will do the second half of the jigsaw and you will teach your group mates.