BIOL 3130 Lecture : Conservation Biology - 3. Global Diversity

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ochreherring44

23 Mar 2012

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Biodiversity crisis: we"re in an age of increased species loss and increased risk of extinction. Global biodiversity: a termed coined by e. d wilson popularized in 1988: defining biodiversity: The sum total of all living things : can be confusing, needed: a precise quantitative measure, currently: a bewildering array of diversity indices (magurran1988) measure of # of species in a given area. : the number of individuals in each species. : species with most competitive advantage, impacts: richness, abundance, dominance, evenness relevant/irrelevant. : the genes, species, and habitats found at a time and place. : the vertical and horizontal arrangement of physical space (snags, riffles, litter. : the processes that affect (and are affected by) biodiversity (biochemical: canada"s biodiversity strategy, derived from the rio convention (1992, objectives. What mechanisms create, maintain, and explain the loss of species diversity: made possible by satellites and computers. Geographical information systems (gis), landsat photos, sub-meter gps mapping.

Related Questions

Q1.14. Which of the following statements about beta diversity is FALSE?

Beta diversity measures how quickly species composition has changed through time.

All else being equal, specialists are likely to be more common where beta diversity is high.

Relatively flat, homogeneous habitats tend to have lower beta diversity.

Beta diversity changes depending on the scale at which you measure it.

Q1.15. Paul Ehrlich and E.O. Wilson offered a number of reasons to protect biodiversity. What were they?

Check all that apply:

Earth cannot "survive" another mass extinction event.

People have an aesthetic and moral obligation to protect Earth's species.

Earth's biodiversity may provide us with important new resources in the future.

Loss of biodiversity may reduce ecosystem services that would be difficult to replace.

What is biodiversity?

How do ecosystems function when there is low biodiversity versuswhen there is high biodiversity?

Why does Costa Rica have high biodiversity?

Why biodiversity is considered important for the functioning ofan ecosystem?

What are the limits of ecotourism in protecting theenvironment?

Evaluation Criteria:
Your submission will be evaluated against the following criteriausing the grading rubric:

Did you explain what biodiversity is?

Did you compare how ecosystems function when there is lowbiodiversity versus when there is high biodiversity?

Did you explain why Costa Rica has high biodiversity?

Did you address why biodiversity is considered important forecosystem function?

Did you describe the limits of ecotourism in protecting theenvironment?

In the early years of the conservation movement (1970s), efforts were aimed mainly at the salvation of individual speciesâthat is, saving them from extinction. Today, conservation biology is aimed more at the biodiversity of the entire community and the ecosystem. Explain in detail why there has been this shift in focus. Give a specific example.

BIOL 3130 Lecture : Conservation Biology - 3. Global Diversity

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