Ecosystems: Everything is Connected Dead leaf falls from a tree into a stream Bacteria and fungi start to eat the leaf Insects will start to physically break down the leaf Motion of stream will also break down the leaf Caddisflies will catch and eat the pieces Algae and river plants will also eat the leaf Predator insects eat insects that ate the leaf Birds will eat the predator insects While nesting in trees, these birds excrete droppings that provide nutrients that can be used by the tree to form a new leaf. What is an Ecosystem? Def: all the organisms living in an area together with their physical environment. Examples An Oak forest in NE Pennsylvania A coral reef in the Pacific Ocean Coral Reef Oak Forest Vacant Lot Components of an Ecosystem Biotic and Abiotic factors Organisms Populations Communities Ecosytem Def: All the living and nonliving things in an area Biotic Factors Biotic Factors: The living parts & ONCE living parts of an ecosytems Includes all the Plants and animals Biotic Factors Include: Dead Organisms Dead parts of an organism Leaves An organism’s waste products Abiotic Factors Def: The non-living parts of an ecosystem Includes: Air Water Rocks Sand Light Temperature What’s in an Ecosystem? All the living and nonliving things in an ecosystem Examples: Garden Log Garden Log Rainforest Rain Rocks Tree Frog Monkey Poop Human Tourist Dead Toucan bird Spider Monkey Waterfall Soil Sunlight Moist Air Dead branch Rainforest Rain Rocks Tree Frog Monkey Poop Human Tourist Dead Toucan bird Spider Monkey Waterfall Soil Sunlight Moist Air Dead branch Desert Sand Urine Cactus Clouds Gila Monster Temperature Mountain Hair Moonlight Gravel Dead Rattlesnakes Desert Sand Urine Cactus Clouds Gila Monster Temperature Mountain Hair Moonlight Gravel Dead Rattlesnakes Activity Pick two ecosystems to compare and contrast. Find the similarities and differences between abiotic and biotic factors in your two ecosystems Time: 4 minutes Drill Time! Complete Homework #5 on page 11 Independent, silent work Time: 4 minutes Biodiversity Def: The variety of living things in an ecosystem Types of Biodiversity High Biodiversity Low Biodiversity • An ecosystem that has a large variety of plants and animals • An ecosystem that has very few different plants and animals • Think: Different • Think: Same High or Low Biodiversity? Over 1,00 species of insects live in just one kind of rainforest tree, and the rainforest contains over 250,000 different kinds of plants High or Low Biodiversity Many plants and animals have difficulty surviving in the scorching heat of the desert High or Low Biodiversity Wetlands support a wide variety of species. Plant life flourishes in the wetlands Drill Time Complete Practice #6 and Homework #6 Low volume group work Time: 4 minutes Bill Nye the Science Guy A short video (23 minutes) on biodiversity Fill out video worksheet slip Don’t forget your NAME!!