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3-26-18 Symbiotic Relationships
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Do Now: Take out the Key Concept Builder assignment from Friday
Do Now: Take out the Key Concept Builder assignment from Friday. Match the vocabulary term to the definition below. 1. how a population would grow under perfect conditions 2. something that can restrict the growth of a population 3. the largest number of individuals of one species that an ecosystem can support over time Biotic potential Limiting factor Carrying capacity
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Review: Key Concept Builder (page 33)
1. decrease 2. decrease 3. increase 4. decrease 5. increase 6. increase 7. Possible answer: Population density is the number of individuals in a certain amount of space. 8. Possible answer: The hallways have a high population density before classes begin. The principal’s office has a low population density.
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Review: Key Concept Builder (page 34)
1. factors that can limit the growth of a population 2. food, water, space, shelter 3. Possible answer: If there are not enough resources, some individuals cannot survive, which limits the population’s growth. 4. predation, competition, disease, parasitism 5. competition and predation
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Review: Key Concept Builder (page 34)
6. Biotic potential is the potential growth of a population if it could grow in perfect conditions with no limiting factors. 7. Carrying capacity is the largest number of individuals that can survive in an area over a long time. 8. No; Possible answer: Almost no population reaches its biotic potential because perfect conditions almost never exist. 9. Yes; Possible answer: Carrying capacity is based on the resources available and other limiting factors. 10. No; Possible answer: It is based on perfect conditions that do not exist and do not change. 11. Yes; Possible answer: It is based on limiting factors, which can change. If limiting factors change, carrying capacity changes.
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EQ: What are some examples of symbiotic relationships?
Standard: SC.7.L.17.2 Lesson Objective: Students will be able to compare and contrast the relationships among organisms.
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Communities All the populations in the same area interact as a community: all the populations that live together in the same place. Comunidad: todas las poblaciones que viven en un ecosistema al mismo tiempo. Some populations might compete with each other for resources and space.
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Symbiotic Relationships
Each population has different ways to stay alive and reproduce. All of the populations in a community share a habitat: the place within an ecosystem where a population or organism lives. Habitat: lugar en un ecosistema donde vive un organismo
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Symbiotic Relationships
Niche: the way a species interacts with abiotic and biotic factors to obtain food, find shelter, and fulfill other needs. Nicho: forma como una especie interactua con los factores abioticos y bioticos para obtener alimento, encontrar refugio y satisfacer otras necesidades. Example: different species of birds have different adaptations that allows them to feed in different parts of a pond
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Symbiotic Relationships
Some organisms develop relationships with other organisms that help them survive. A symbiotic relationship is one in which two different species live together and interact closely over a long period of time. Simbiosis: relacion estrecha a largo plazo entre dos especies que generalmente involucre intercambio de alimento o energia. These relationships can be beneficial to both organisms, beneficial to one and harmful to the other, or beneficial to one and neutral to the other.
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Types of Symbiotic Relationships
Mutualism—two species in a community benefit from the relationship. Example: bees & flowers Bees benefit as they get nectar (food) Flowers benefit as the bees spread the flower’s pollen.
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Types of Symbiotic Relationships
Parasitism—one species (the parasite) benefits while another (the host) is harmed. Example: Mosquitoes & Host Organism Mosquito benefits as they obtain blood (food) Host organism is harmed as it loses blood.
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Types of Symbiotic Relationships
Commensalism—one species benefits and the other is neither helped nor harmed. Example: The remora rides attached to sharks and other types of fish. The remora benefits by gaining a measure of protection, and it feeds off of the remains of the meals of the larger fish. The larger fish is neither helped nor harmed.
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Video Summaries Ecological Relationships, Amoeba Sisters: Ant/Acacia tree symbiosis: More examples of symbiotic relationships:
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Work on Key Concept Builder – What are some examples of symbiotic relationships?
This will be your homework if not finished in class.
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