Species extinction
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This document discusses species extinction and identifies four types: local extinction, extant species, threatened or endangered species, and functionally extinct species. It provides examples for each type. There are two main causes of extinction: natural causes like climate change and asteroids and anthropogenic causes like habitat destruction and pollution. Protecting biodiversity is important, especially protecting habitats, as species cannot survive without natural homes. The document ends with assessment questions about causes of extinction.
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Human activities such as increased population, habitat destruction, pollution, and climate change are reducing biodiversity and causing species extinction. Habitat fragmentation and introducing foreign species that outcompete native species also negatively impact biodiversity. Specific human factors driving biodiversity decline include deforestation in the Philippines, bottom trawling fishing techniques that damage ocean habitats, and pesticide pollution that weakens predatory bird populations.
Anthropogenic Extinction
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Species Extinction- Reasons and Effects?
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Species extinction
- 2. LEARNING COMPETENCY: Relate species extinction to the failure of populations of organisms to adapt to abrupt changes in the environment.
- 3. SPECIES EXTINCTION When the last existing individual of that species dies. This implies that there are no more surviving organisms that could reproduce a new generation of offspring.
- 4. 4 TYPES OF SPECIES EXTINCTION LOCAL EXTINCTION OR EXTIRPATION EXTANT SPECIES THREATENED OR ENDANGERED SPECIES FUNCTIONALLY EXTINCT
- 5. LOCAL EXTINCTION OR EXTIRPATION- A species may be extinct in a particular area but continues to exist elsewhere. MONKEY
- 6. EXTANT SPECIES- that are not extinct. WILD CATS
- 7. THREATENED OR ENDANGERED SPECIES- extant species that are threatened by extinction or near extinction. TARSIER
- 8. FUNCTIONALLY EXTINCT-are those preserved and maintain only in zoos and other artificial habitats they are no longer in the wild.. PANDA
- 9. FUNCTIONALLY EXTINCT-are those preserved and maintain only in zoos and other artificial habitats they are no longer in the wild.. PANDA LOCAL EXTINCTION OR EXTIRPATION- A species may be extinct in a particular area but continues to exist elsewhere. MONKEY EXTANT SPECIES- that are not extinct. WILD CATS THREATENED OR ENDANGERED SPECIES- extant species that are threatened by extinction or near extinction. TARSIER 4 T Y P E S Of S P E C I E S E X T I N C T I O N
- 10. 2 CAUSES OF EXTINCTION NATURAL CAUSES OF EXTINCTION Climate Change Asteroids and Cosmic Radiation Acid rain Diseases and Epidemics Introduction of Invasive Alien Species ANTHROPOGENIC CAUSES OF EXTINCTION Habitat Destruction Pollution Overexploitation
- 11. PROTECT BIODIVERSITY HABITAT PROTECTION VALUES INTEGRATION: -it is more practical and effective to protect a habitat than to try to restore it after it has been destroyed. A species cannot survive without a natural home. It is therefore of prime importance that the habitat of a species remains intact.
- 12. ASSESSMEN T
- 13. DIRECTION: Answer the following questions and write your answer in your answer sheet. 1. Why is human overpopulation a cause of the extinction of various organisms? 2.What do you think are the two major factors that account for a fast rate of extinction in our country? Justify your answer. 3.Do you think the government is doing its best to address the major causes of plant and animal extinction in our country? Why?
- 14. REFERENCE: BREAKING THROUGH SCIENCE 9 pp. 44- 51