human activities and biodiversity
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Human activities and biodiversity. Activity 2. Biodiversity—variety of organisms in an area. Why is biodiversity important ? Everything that lives in an ecosystem is part of the web of life, including humans. - PowerPoint PPT PresentationTRANSCRIPT
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HUMAN ACTIVITIES AND BIODIVERSITY
Activity 2
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Biodiversity—variety of organisms in an area
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• Why is biodiversity important?•
Everything that lives in an ecosystem is part of the web of life, including humans. • Each species of vegetation and each creature has a place on the earth and plays a
vital role.• Plant, animal, and insect species interact and depend upon one another for what
each offers, such as food, shelter, oxygen, and soil enrichment.
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Ecosystem diversity
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Species Diversity—number of species that exist in an area
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Genetic Diversity—variations of genes within a population of organisms
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How do humans alter the biodiversity of groups of taxa?•Habitat destruction
• Introduced species —invasive species (non-native species introduced in an area where they are not normally found; considered invasive if it causes harm to health economy, or environment)
• Pbs—Biological invaders• Leafy splurge• Warming climate and insect
•Overexploitation —harvest plants or animals for food, medicine, lumber, etc. (rate of harvesting exceeds ability of population to recover)
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On a white board:• Your assigned Scenario:Type(s) of human impact: Type(s) of biodiversity
altered.
• Be prepared to share aloud to the class…