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DO NOW Date: 03/27 Reminders: What events can cause too much nitrogen to be added to bodies of water? ( lakes, oceans, rivers) ESSENTIAL QUESTION: How does biodiversity lead to a stable ecosystem? OBJECTIVES: -Observe the factors within a microhabitat -Define population, community, and ecosystem MICROHABITAT a specific, small-scale environment in which Microhabitat: organisms live. MICROHABITAT -Look for a organisms under rocks or other hidden places. Make sure you are gentle and RETURN rocks to original spot. -Using your student sheet, you will draw different BIOTIC and ABIOTIC parts of the micro-habitat that is the courtyard. Courtyard Expectations • Level 0 in hallway • No more than a level 2 voice in courtyard. • Classes are in session around us. Do not disturb them. • Stay in 1 place and focus on the tiny details of the microhabitat! HABITAT DEBRIEF • Which species stay in the micro-habitat of the courtyard? • Which species enjoy a larger habitat than just the courtyard? What if? Turn and talk What might happen to the microhabitat (courtyard) if the population of raccoons were to increase on the O. Henry campus? Definition • Fill in the following definition for HABITAT on your student sheet: HABITAT: A particular type of environment regarded as a home for organisms. Levels of Organization • Label the levels of organization on your sheet DEFINITIONS With your table group, come up with your own definition of the following…. Population Community Ecosystem POPULATION • a group of organisms of the same species living in a specific area COMMUNITY • A group of organisms from different species living in the same place and interacting with each other. ECOSYSTEM • The interaction between organisms and their physical environment. DO NOW Date: 3/29 Reminder: -Write the question(s) -Write in complete sentences What is the difference between a community and a population? What is the very top level of our biological levels of organization? ESSENTIAL QUESTION: How does biodiversity lead to a stable ecosystem? OBJECTIVES: -Observe how organisms benefit each other -Explore symbiotic relationships and how they relate to adaptations VIDEO • TED ED - Symbiosis THINK Review • For multiple choice questions, answer individually on your dry erase board. • For open-ended questions, turn and talk to your partner to come up with an answer • Be prepared to share. Symbiotic Relationship example Creative Interpretation In your notebook on page_____, pick one: 1. Describe a symbiotic relationship between two or three organisms. • The relationship can exist, or you can make it up (including the organisms) • Must be at least one page. 2. Draw a detailed diagram that represents a real or fictional symbiotic relationship. • Must be in color • Must be labeled in detail Succession Plot Drawing Abiotic/Biotic Factors KEY: Primary Succession Secondary Succession Predictions: What will you observe a week from now? Week 1: Week 2: 1000 Year prediction: Succession Plot • We will go outside and scrape out all of the plant life from 1 square foot of soil. • You will draw the plot with pencil. • You will record any biotic or abiotic factors you observe in the plot. • You will predict what it will look like in one week. Outside Expectations • Level 0 in hallway • No more than a level 2 voice outside. • Classes are in session near us. Do not disturb them. • Stay in 1 place and focus on the tiny details of the succession plot! BIODIVERSITY IQ TEST Lets see how much you already know about organisms! Answer the questions on your sheet. DO NOW Date: 3/30 Reminder: -Write in complete sentences Describe a symbiotic relationship between 2 or more organisms Biodiversity •Biodiversity refers to the number and variety of species on Earth. •The number of known species on Earth is about 1.6 million, most of which are insects. •This is different from the actual number of species on Earth, which may be closer to 13 million. Importance of Biodiversity •Biodiversity provides: a variety of products and resources a livable planet for us and for all other species. •Biodiversity helps: maintain the atmosphere keep the soil fertile purify water Loss of Biodiversity 1. We share the environment with other organisms in a complex network. 2. Each species has a role or niche to play in its ecosystem. 3. If one species disappears from an ecosystem, the ecosystem changes. Keystone species are species that are so important to the functioning of an ecosystem that if they disappear, the ecosystem falls apart. An Example in Texas: Black-tailed Prairie Dogs • Black-tailed prairie dogs once roamed the western mid-west. Now cover less than 1% of their original territory. Digging aerates and promotes soil formation. Clip back brush maintaining the short grass prairie. Provide food and shelter for as many as 170 different animals. Main Threats to Biodiversity • HABITAT LOSS • INTRODUCED SPECIES • POPULATION GROWTH • POLLUTION Habitat Loss •the destruction of habitats is the number one cause of species extinction. Turn and Talk •How does habitat loss affect biodiversity in an ecosystem? Introduced Species • Nonnative or Exotic species that are not native to a particular region. Fire ants from South America entered the U.S. through Mobile, Alabama, probably in soil used for ships' ballasts. They were accidentally introduced around the 1930's and have been spreading ever since. Turn and Talk •How do introduced species affect biodiversity in an ecosystem? Population Growth •There are 6 billion humans living on Earth. •Earth’s population of human beings is increasing at a rate of about 222,000 people each day. •Humans take up more space and deplete more resources than any other species. Pollution •Can be an oil spill, acid rain, trash or insecticides that can cause reproductive failure in fish, birds, and mammals (like DDT). Turn and Talk •How does pollution affect biodiversity in an ecosystem? Extinction Extinction occurs when the last individual of a species dies. San Marcos Gambusia, Texas, 1983 Texas red wolf, Oklahoma, Texas, 1970 Mass Extinction • • • the extinction of many species during a relatively short period of time. often caused by a change in climate. Many scientists believe that we are living in a mass extinction, and that by the year 2100, 25% or more of all species of plants and animals that were on Earth in 1900 will have become extinct. Turn and Talk •How will this mass extinction affect Earth? Fusion Book • Using Pages 375 – 379, complete the “Earth’s Biomes” sheet DO NOW Date: 3/31 Reminder: Write in complete sentences Why is biodiversity so important? Planet Earth Biomes Work with a partner on a laptop and complete Biome Research paper. http://sciencespot.net/ Turn and Talk • Compare your notes with those of your shoulder partner. • Discuss whether you would like to visit that Biome and why or why not. Biomes • • • • • • • Polar Ice Tundra Taiga (29:00) Deciduous Forest Savannah Desert Rainforest