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Thursday October 22nd In Notebook: What type of graph is this? & Write 2 sentences describing the yeast population. Today’s Learning Targets Agenda: 1. Population Questions 2. Biodiversity 3. Populations Packet Work Time - Due Monday! On a loose sheet of paper: NAME 1. Is the world’s human population increasing or decreasing? 2. List 2 advances in society that allow for the carrying capacity/human population to increase. 3. Which countries have a higher growth rate, developed or developing. 4. Is the human population on Earth greater than or less than 7 billion? 5. Do all countries have he same populations growth rate? Yes or No? ** Bring it up to me when done. No phones until everyone is done! Diversity in Everyday Life: What is it? Diversity = the quality or state of having many different forms, types, ideas, etc. = Variety of life in an area (# of organis ms) Does location affect biodiversity? Biodiversity Hot Spots! Biodiversity increases towards the equato 3 types of Biodiversity Genetic Diversity Species Diversity Ecosystem Diversity Importance of Biodiversity: Direct vs. Indirect Value $ Direct Economic value • Plants and animals provide: Food, clothing, energy, medicine, and shelter • Preserve desirable genes of those who aren’t used directly – Food crops – most crops come from a few species • They lack genetic diversity, so we need the wild variety to increase diversity. • Example: disease resistance in wild, but not food crops Importance of Biodiversity: Direct vs. Indirect Value Indirect Economic Value • Plants provide oxygen & remove CO2 • Natural processes clean water • Protection against floods & droughts $ Indirect because… how you place a value/cost on these?? Water cycle, carbon cycle, wetlands New York City – create $6 Billion water filtration system or clean wetlands to filter water natural processes cost less money than technology Importance of Biodiversity vs. Aesthetic and scientific value • Camping • Hunting • Research $ What role do humans play? • Extinction = state or process of a species or larger group dying out / disappearing • Normal Background Extinction: activity from other organisms, climate change, and natural disasters -> NOT A CONCERN! • 1/3 to 2/3 of current species will go extinct in second half of this century -> A CONCERN! • Humans are increasing extinction rates to 1000 times normal background extinction rate. But it’s just one species… Keystone Species = a species that plays a large role in an ecosystem. Removal of this species will affect entire food web/ecosystem. Think of it as the one block that drops the Jenga tower! What threatens biodiversity? Concept Map: Example Create a concept map with the following bullet points. • Breakfast • Dairy • Donut • Cereal • Yogurt • Grapes • Baked Goods • Fruits • Scone • Fruit Loops Threats to Biodiversity: Individually create a concept map of the bullet points. *Read book pages 124-128. Raise hand when done and I will check it!* • Biodiversity threats • Introduced Species • Eutrophication • Overexploitation • Destruction of Habitat • Acid Precipitation • Fragmentation of Habitat • • • • • Biological Magnification Disruption of Habitat • Carolina Parakeets were hunted to extinction because their feathers were used for women’s hats • Highways were installed in rural Indiana forming separate portions of land • Lionfish are from the Indo-Pacific, but can be found in U.S. waters after being dumped from aquariums Construction workers are bulldozing trees and compacting the ground to build a subdivision • Factories create pollution that harms the habitats around them Heavy metals used in construction enter the water/ the food web • River-run off containing fertilizer enters ocean and causes an increase in nutrient availability The pH of Adirondack lake was lowered and therefore many fish could not survive.