Habitat Destruction
Overzicht
When a forest is felled or a wetland drained, far more is lost than trees or water. Every habitat is a web of living things that depend on one another, so destroying it can topple species that never lived there directly. Habitat destruction is now the single biggest cause of falling biodiversity worldwide.
In this lesson you will define biodiversity, set out the main reasons habitats are destroyed, and see how disturbing a food web ripples outward. You will then work through deforestation as a detailed case study, explaining its undesirable effects: lost biodiversity, extinction, soil erosion, flooding and a build-up of carbon dioxide.
Doelstellingen
- [Core] Describe an ecosystem as a unit containing the community of organisms and their environment, interacting together
- [Core] Describe biodiversity as the number of different species that live in an area
- [Core] Describe the reasons for habitat destruction, including: (a) increased area for housing, crop plant production and livestock production (b) extraction of natural resources (c) freshwater and marine pollution (a detailed description of eutrophication is not required)
- [Core] State the undesirable effects of deforestation as an example of habitat destruction, to include: reducing biodiversity, extinction, loss of soil, flooding and increase of carbon dioxide in the atmosphere
- [Supplement] Explain the undesirable effects of deforestation as an example of habitat destruction, to include: reducing biodiversity, extinction, loss of soil, flooding and increase of carbon dioxide in the atmosphere
Audioles
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Mindmap
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Lesevaluatie
Gefeliciteerd met het voltooien van de les op Habitat Destruction. Nu je de sleutelconcepten en ideeën, het is tijd om uw kennis op de proef te stellen. Deze sectie biedt een verscheidenheid aan oefeningen vragen die bedoeld zijn om uw begrip te vergroten en u te helpen uw begrip van de stof te peilen.
Je zult een mix van vraagtypen tegenkomen, waaronder meerkeuzevragen, korte antwoordvragen en essayvragen. Elke vraag is zorgvuldig samengesteld om verschillende aspecten van je kennis en kritisch denkvermogen te beoordelen.
Gebruik dit evaluatiegedeelte als een kans om je begrip van het onderwerp te versterken en om gebieden te identificeren waar je mogelijk extra studie nodig hebt. Laat je niet ontmoedigen door eventuele uitdagingen die je tegenkomt; beschouw ze in plaats daarvan als kansen voor groei en verbetering.
- Biodiversity is defined as: A. the total number of animals in an area B. the number of different species that live in an area C. the size of the largest population D. the number of food chains Answer: B
- Which is NOT a direct effect of deforestation? A. soil erosion B. increased carbon dioxide C. increased biodiversity D. flooding Answer: C
- Deforestation increases atmospheric carbon dioxide mainly because: A. trees release carbon dioxide while alive B. fewer trees remove carbon dioxide by photosynthesis C. soil absorbs carbon dioxide D. rivers flood Answer: B
- Removing tree roots from a hillside leads to: A. less rainfall B. soil erosion and flooding C. higher biodiversity D. more nutrients in the soil Answer: B
- A reason for habitat destruction is: A. planting hedgerows B. extraction of natural resources C. creating nature reserves D. captive breeding Answer: B
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Aanbevolen Boeken
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Leerboekparagraaf
Threats to Biodiversity
Identify significant threats to biodiversity
"Biology: Threats to Biodiversity" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/47-3-threats-to-biodiversity. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Leerboekparagraaf
The Biodiversity Crisis
Define biodiversity
"Biology: The Biodiversity Crisis" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/47-1-the-biodiversity-crisis. Access for free at https://openstax.org/books/biology/pages/1-introduction
Gepubliceerd door andere organisaties onder open licenties, vermeld zoals zij vragen. Links openen hun websites.
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