Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 6
| Question | Answer |
|---|---|
| Biodiversity | variety of all life on Earth Has genetic diversity Ecosystem diversity |
| Survivorship curves | Shows lifespan and mortality rate Three types Y axis shows survivors X axis shows age |
| Lifespan | maximum length of time a species can live |
| Life expectancy | Average amount people actually live |
| Extinction | thought that 99.9% of all species that have ever lived are now extinct |
| Invasive species | Organisms not indigenous to particular area Organisms are introduced to an either either accidentally or on purpose Cause loss of biodiversity |
| CITES | Convention on International Trade of Endangered Species of Wild Flora and Fauna - First international treaty protecting wildlife, enacted in 1975 to ensure that trade in animal and plants does not lead to extinction |
| Endangered Species Act | Enacted in 1973, modified three times Administered by US fish and wilflife services |
| Wildlife crossings | bridges, tunnels, or land that is off limits to humans where animals can roam without interference |
| Botanical Gardens | House plants, trees, sometimes animals May have breeding programs |
| Distribution and # of species | |
| Why preserve biodiversity? | - Intrinsic value of that species -Potential value -Medicinal properties |
| Three types of survivorship curves | Shows aspects of an organism's life |
| #1 | High juvenile survival, many individuals live long life, mortality increases with age with a significant drop off later in life Humans |
| #2 | Equal chance of dying at any age Birds |
| #3 | Juvenile mortality rate is high, but those that survive are likely to live a long life... turtles |
| Romeo and Juliet Effect | Incorrectly declaring a species extinct may prompt people to give up on it, leading to its demise |
| Earth's extinction events | Five mass extinction |
| Causes of extinction | - human influence/activity |
| Negative impacts on pollinators | Monarch butterfly populations declining, loss of milkweed Less pollinators means less pathogens, poor nutrition, pesticide use, climate change |
| Impact and examples of invasive species | Leafy spurge NAtive to europe and asia, brought over while transporting crops Makes cattle sick |
| How biodiversity is being protected | CITES Conventions International whaling commission ESA |
| Roles of zoos and sanctuaries | breeding programs for endangered species, public education, research to aid species survival |
| Earth's extinction events ODPTC | Old dear people tell comparisons |
| Ordovician | 444mya Death rate 85% Caused by cooling period which decreased sea levels hundreds of feet |
| Devonian | 383-359mya Death rate 70% Occurred due to plummeting oxygen levels, posisbly caused by volcanism or asteroids Many reef building creatures died out |
| Permian Triassic | Permian triassic 252 mya 95% death rate "Great Dying" single worst event life one earth experienced... 96% marine species and 75% land animals died |
| Triassic Jurassic | 201 mya death rate of 85% caused by earth warming due to increased CO2 and acidified oceans.... crocodilians mostly died out marine animals hard to build shells from carbonate calcium |
| Cretaceous Paleogene | KT 66 mya death rate of 80% caused by asteroid strike which led to severre global cooling... killed all non-avian dinosaurs |
| Introduced to australia to control insects eating sugarcane in 1930s, but unable to eat No native predators, toxic skin, reproduced quickly Resort to cannibalism | Cane toads |
| Detrimental to aquatic systems Stick to pipes, boats, other mussels incapacitating them | Zebra mussels |
| Brought to US as an ornamental plant Spreads quickly due to many seed heads | Giant hogweed |
Created by:
ab4677