Title of notes: BIODIVERSITY pg. 39 & 40 Goal for lesson: write on self assessment worksheet I can describe in detail two things that threaten biodiversity. http://www.millan.net

Bell work Week 36 Pick a science word and write the definition. Chapter 14 in Life Science book Check calendar!

Benefits of Biodiversity Clean air Food to eat Clean water Medicines Raw materials Recreational purposes

The variety of life in an ecosystem. What is biodiversity? The variety of life in an ecosystem.

Every species plays a vital role in their ecosystem. Why is biodiversity important? Every species plays a vital role in their ecosystem.

BIODIVERSITY THREAT habitat destruction Development of natural areas for cities or agriculture results in ____________________ habitat destruction http://www.simtropolis.com/idealbb/files/SG_ShoppingCenter.JPG

BIODIVERSITY THREAT Habitat fragmentation Splitting a habitat into smaller disconnected pieces = _____________________ It results in small “islands” of natural area isolated from each other by crop land, pasture, pavement, or even barren land. Habitat fragmentation http://en.wikipedia.org/wiki/Habitat_fragmentation

BIODIVERSITY THREAT INVASIVE SPECIES PREDATORS INCREASE One of most important threats to biodiversity come from apparently harmless plants or animals that humans transport into new habitats = _____________________ New habitats don’t have ____________ and parasites that control the population in their native habitats, so invasive species populations _____________ rapidly. INVASIVE SPECIES PREDATORS INCREASE

BIODIVERSITY THREAT pollutants The addition of ________________ = harmful materials that can enter the biosphere through land, water or air can also threaten biodiversity. http://www.kidcrosswords.com/kidoutdoors/the%20environment/pollution_smokestacks.jpg http://www.iol.ie/~carigeen/pollution.jpg

_____ was first modern insecticide Example: _____ was first modern insecticide It was cheap, stayed active for long time, and kills many different insects Used to control agriculture pests and disease carrying _______________ DDT MOSQUITOES http://www.michigan.gov/images/mosquito_65147_7.jpg

______________________. food chain tissues doesn’t degrade DDT in the environment gets into organisms through the ___________, is stored in __________, and ______________________. food chain tissues doesn’t degrade http://www.geocities.com/~greyhawk_1/sh_eagle-9.jpg

→ → BIOLOGICAL MAGNIFICATION ______________________________ = the ____________ of a harmful substance ____________as it passes to organisms at _______________levels in food chain or web. concentration increases higher trophic Plants pick up DDT from water & store it Herbivores eat plants and store some DDT Carnivores eat herbivores and store more DDT → →

WHAT DOES IT MEAN? REMEMBER! Everything is connected. BIODIVERSITY is a measure of the health of an ecosystem. Image from: Pearson Education Inc, publishing as Pearson Prentice Hall ©2006