Warmup Name three biomes on Earth. How are they different?
Honors Warmup Draw a diagram of relative precipitation and temperature of the world’s biomes.
Biodiversity 2.7.2b Explain biodiversity as including genetic variations within populations and variation of populations within ecosystems that makeup the biosphere. 2.7.2d Explain the global impact of loss of biodiversity.
Biodiversity Definition: the number of different species in a given area
However, we can look deeper into the diversity of different types of areas... • Biodiversity of the biosphere • All the species on Earth • …biome • All species in similar areas on Earth • …ecosystem/community • All species in a smaller area on Earth • …population • All the individuals of one species in an area on Earth
Genetic Diversity • The total number of genetic characteristics in a given population • These variations serve as a way for a population to adapt to changing environment. • Greater variation increases the chance that some individuals of that population will possess variations that are suited to the new environment. • They’ll live and pass on those traits to the next generation, preventing extinction of their species!
Imagine: One individual has a mutation that makes it darker color than the rest of the population. After a volcanic eruption, so the cover is no longer pale yellow, but a dark. The darker individual will then survive in the new environment and reproduce more than the other individuals, passing on “dark color” genes to the next generation.
Variation in an Ecosystem Every organism has a role to play in its environment. This role, which includes where it lives in the environment, what it uses, what it eats, and who eats it, is called its niche. No two species can ever share the SAME niche.
Variation in an Ecosystem When a species is lost in a diverse ecosystem, then another species may take over its role… Or all the organisms that depend on it may die if there is not a diversity of organisms already in that ecosystem. But it takes a LONG time.
Loss of Biodiversity • The greatest threat to biodiversity is habitat loss. • Habitats (places where organisms live) are “lost” due to land use changes • Agriculture • Urbanization
Habitat Fragmentation Fragmentation is the process that divides large ecosystems into smaller, isolated parts. As a habitat gets smaller, more and more species are affected. Smaller habitats -> less diversity -> less of a chance to recover from changes in the ecosystem
Video: Smoky Mountain Diversity 10 facts
Academic: Endangered Species of NC • Pick an endangered species in North Carolina • Tell me about the species • What does it look like? • Where does it live? • Describe its niche • Describe the threats to it • Why should we care about it? • What is being done to save it?
Honors: Brands for Biodiversity Pick a species found in a threatened ecosystem. Describe a product (you can make one up!) that can be marketed to protect the ecosystem. How will you market it? Draw a picture or diagram of the product/advertisement Describe what effect this marketing campaign will have on conservation of the ecosystem.
Activity: 400 Acre Wood What could you use the 400 acres for? Which activities would cost the most to provide on the forest land? Which would bring the most visitors? Which would have the greatest impact on the forest ecosystem?On wildlife? Would the effect be temporary or permanent? Which would cause fragmentation? Which would provide for societies needs?
Activity: 400 Acre Wood • Read “If You Were the Boss” • Decide the best use (or uses) of the 400-Acre Wood • You will be developing a land management plan that will serve the best interests of the entire ecosystem. • You can use the entire ecosystem for one use (400 acres) or for multiple uses (ex: 100 acres of wilderness, 80 acres of campground, 220 acres of timber harvesting) • Once you’ve decided on the number of acres for each use, use the “What’s the Score” to calculate the cost/benefit analysis of your plan
Warmup What is the greatest threat to biodiversity? Explain how it affects biodiversity. (Hint: use the word habitat fragmentation in your answer.)