APES-2/6 Please have out Part A from yesterday- Thanks Quiz and brochures back tomorrow
Loss of SpeciesHow have human activities affected the earth’s biodiversity?How can we protect and sustain biodiversity?
Ecological Intelligence “even the most ecologically concerned among us do not really know the effect on the planet of how we live. And so our obliviousness lets us slip into a grand self-deception that the small and large decisions in our material lives are of no great consequence”
APES- Thurs 2/7 Please have out your Part A and B = your work from the computer lab
With your tablemates What is a biodiversity hot spot? What is an endemic species? Share your biodiversity hot spot research What does it mean to be locally extinct, ecological extinct and biological extinct? 5. Put in order of increasing number of a species: Vulnerable, endangered, critically endangered, threatened
Species Extinction Local Extinction Ecological extinction Biological Extinction
Passenger pigeon Dusky seaside sparrow Great auk Dodo Aepyornis (Madagascar)
Estimating Extinction Rates Current rate estimated 1000 to 10,000 times the rate before human activity (3-200 species per day worldwide) at this rate 20% of worlds plant and animals gone by 2030, 50% by end of century Rates higher in ‘hot spots’, may lose 25-50% of species in a few decades
Estimating Extinction Rates Species-area relationship Loss of 90% of habitat results in loss of 50% of species 1 million species lost in tropical forests in coming decades World conservation union keeps a ‘red list’ Used as a baseline for changes in biodiversity
Threatened In the US 163 animal and 146 plant species are listed Endangered In the US 409 animal and 609 plant species are listed www.fws.gov/endangered/species Endangered and Threatened Species
34% (51% of freshwater species) Fish 24% Mammals 20% Reptiles 14% Plants 12% Birds
What is causing species loss? • Planet in Peril
APES- 2/8 Smile! It is Friday! Please have out your Part A and B handout and your notebook for very short notes! THANKS!
With your tablemates Talk about and come up with a list of 5 threats to species? (in other words: Why do species become extinct?)
Greatest threat to species “HIPPO” Habitat destruction= urban sprawl, fragmentation, conversion, simplification Invasive species Population (humans) growth Pollution Over harvesting food, sport, commercial
Spotter airplane Trawler fishing Fish farming in cage Purse-seine fishing trawl flap sonar trawl lines fish school trawl bag fish caught by gills Drift-net fishing float buoy Long line fishing lines with hooks
Probable range 1600 Range today (300,000 left) African Elephant
Range 100 years ago Range today (about 2,300 left) Indian Tiger
California Condor Habitat loss due to urbanization Loss of old growth forest leading to loss of resources, loss of nesting/breeding ground/, reduction in food source lead poisoning from shotgun pellets, poisoning due to predator control and hunting for eggs, skin trophies
IUCN International Union for Conservation of Nature Global environmental organization Red list of endangered species http://www.iucnredlist.org/
Your Endangered species model http://www.fws.gov/Endangered/ http://www.iucnredlist.org/ http://www.worldwildlife.org/species/ http://www.cites.org/eng/resources/species.html
Welcome to Monday! Please have out your notebooks Today we will finish the movie and have time to research your endangered species Remember Endangered Species Due WED Chapter 12 and 13 due Thurs TEST Thurs Chapter 11, 12, 13
With your tablemates • What are the 5 threats to species? • What is the #1 threat to species? • What is the difference between local, ecological and biological extinction. • Share your Endangered species project idea.
APES Please have out your notebooks! Tomorrow Endangered Species Due Thurs chapter 12 and 13 DUE
Share your Articles • What are the biggest threats to species? • Should we save species? Which ones? • What characteristics that make species prone to extinction?
Characteristic Examples Low reproductive rate (K-strategist) Blue whale, giant panda, rhinoceros Specializedniche Blue whale, giant panda, Everglades kite Narrow distribution Many island species, elephant seal, desert pupfish Bengal tiger, bald eagle, grizzly bear Feeds at high trophic level Fixed migratory patterns Blue whale, whooping crane, sea turtles Rare Many island species, African violet, some orchids Commercially valuable Snow leopard, tiger, elephant, rhinoceros, rare plants and birds Large territories California condor, grizzly bear, Florida panther
Importance of biodiversity Ecosystem function/role- keystone, predatory prey, pollinator, key player in a nutrient cycle Future medical, food, ecotourism resource ( lion skin 1,000 , 25,000 for the whole tiger dead or 515,000 as an attraction ) Aesthetic value/ scenic Intrinsic value/ethical reasons