Discussion2 posted

Discussion2 posted - Are you getting it? (think about these...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Are you getting it? (think about these and write an answer while we are waiting to get started): 1. At what latitude are the worlds deserts and rainforests? 2. Can you explain why they are located there ?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
See video on You Tube: http://www.youtube.com/watch?v=BG9HQQO3v Today’s Discussion: How many species are there on Earth? How many are we losing? Why does it matter?
Background image of page 2
Summary: Biodiversity of Vietnam This video could have been made in any of the world’s biodiversity “hotspots” Evaluate ending statement : “People’s knowledge…is very important in wildlife [ biodiversity ] conservation….even more so when they understand wildlife’s [ species ’] value in nature.”
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Causes of endangerment in US An investigation into the causes of endangerment for 877 species in the United States found that the vast majority were caused by expansion of human activities.
Background image of page 4
How many species are there? Described by taxonomists… ca. 1.8
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How many species are there actually? Estimated on Earth… 5 to 100 million species Why don’t we know how many species there are? -________________________________________________ How would YOU go about estimating the number of species on Earth? -We haven’t yet identified all species (this would take a LONG time)
Background image of page 6
Methods of estimation: 1. Extrapolation from known floras and faunas 1. _____________________________________ 3. Extrapolation from sampling number of species in a defined area
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ods of estimation: xtrapolation from known floras and faunas: of butterflies in Britain # of butterflies on Earth of insects in Britain # of insects on Earth = # of insects on Earth = 4.9 million If about half the species on Earth are insects, that gives an estimate of about 10 million species # of insects on Earth 67 22000 15000 =
Background image of page 8
An estimate of 30 million species, all from 19 trees ( Luehea seemannii ) in Panama Terry Erwin
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Erwin’s (1982) 30 million estimate Fogged 19 Luehea seemannii Observed 1,200 species of beetles
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 26

Discussion2 posted - Are you getting it? (think about these...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online