What is biodiversity? Variety of life in an area – Determined by the # of different species...
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![Page 1: What is biodiversity? Variety of life in an area – Determined by the # of different species Importance: – Increases stability of ecosystem and contributes.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfc21a28abf838ca4be1/html5/thumbnails/1.jpg)
What is biodiversity?• Variety of life in an area– Determined by the # of different species
• Importance:– Increases stability of ecosystem and contributes to
health of biosphere
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Why is diversity important to ecology?
• More diverse = more likely to flourish in the long run– If multiple organisms fill each niche, when trouble
hits one organism, the role can still be filled by another
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What is biodiveristy?
Agenda for Thursday Oct 27th 1.Root word quiz2.Finish notes3.Review game
TEST TOMORROW!!
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Species Diversity
• Number of different species and relative abundance of each– increase as you go towards the equator • Biodiversity hot spots
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Importance of Biodiversity
Direct Economic value• Preserve plants and animals we use• Some plants provide medicinal uses• Preserve desirable genes– Food crops – most crops come from a few species• Close relatives exist in the wild• Disease resistant plants in wild – create disease resistant
crops
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Importance of Biodiversity
Indirect Economic Value• Plants provide oxygen, natural processes clean
water– Water cycle, carbon cycle, wetlands– New York City – create $6 Billion water filtration
system or clean wetlands to filter water
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Importance of Biodiversity
Aesthetic and scientific value• Camping• Hunting• Research
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Threats to Biodiversity
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Non-native/Introduced and Invasive species
• Invasive - species that are not native to Minn.– cause economic, env’t, harm or harm human health
• No predators, parasites, and competition to keep in check– No natural enemies
• Not all are harmful– Pheasants
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Common Invasives
• Buckthorn
• Zebra Mussels
• Emerald Ash Borer
• Silver Carp
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Human Impact• Results in a loss of diversity in both biotic and abiotic
aspects– land use, the cutting of vast areas of forest, and pollution of
the soil, air, and water
• Adding or removing organisms to ecosystems
• Increasing demand for energy– Many risks are associated with use of fossil and nuclear fuels
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Human Impact - pollution• Air pollution
• acid rain
• damage to the ozone layer
• Smog
• global warming
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Atmospheric carbon dioxide
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Human Impact - pollution
• Water pollution
• Eutrophication– accumulation of nutrients in water (Nitrogen)– causes excessive algal growth – This leads to a reduction in oxygen levels and the
death of aquatic life
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Threats chart
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Conserving BiodiversityHow do we conserve and protect biodiversity?• Endangered Species Act
• Protected areas– National Parks– State Parks– International Protected areas• Large reserves protected by buffer zone
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Conserving Biodiversity
• Identify hot spots– Endemic species – species found only in one area
• Corridors– Between habitat fragments– Allows animals to move safely– Creates a larger piece of land = sustain wider
variety of species and genetic variation– Can spread disease
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Restoring Ecosystems
• Abandoned land can recover to create a new ecosystem
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Restoring Ecosystems
• Bioremediation – using living organisms to detoxify an area– Gulf coast oil spill and bacteria
• Biological Augmentation – adding natural predators to a degraded ecosystem