why are species disappearing?
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Why are species disappearing?. Hey – if we don’t know why it’s broke, we can’t fix it!. What’s the difference?. Threatened : vulnerable to endangerment in the near future - PowerPoint PPT PresentationTRANSCRIPT
Check it out!Pass back the new objective
sheet and the permission slip!
Armand Bayou Nature Center
Homework tonight Worksheet – due next
class! Permission slip and
$15 due asap!
Why are species disappearing?
Hey – if we don’t know why it’s broke, we can’t fix it!
What’s the difference? Threatened: vulnerable to endangerment in
the near future
Endangered: at risk of becoming extinct because it is either few in numbers, changing environmental conditions or predation
Extinct- the death of all individuals of a species
Hunting/Fishing
Hunting to eat = subsistence hunting
Bushmeat in Africa and South/Central America
Commercial Fishing, shrimping, crabbing, oystering
Hunting: Pet Trade
Slow loris – not a good pet. Just no.
Commercial hunting Poaching = Hunting
the wrong Species At the wrong time In the wrong
amounts In the wrong places
Competition with introduced species Chinese Tallow Balloon vine
Fire ants
Scientists estimate that every year in the United States alone, cats kill 1.4-3.7 billion birds and approximately 12 billion small mammals, including rabbits, squirrels and chipmunks.
Feral animals (escaped from domestication)
Water hyacinth and chinese tallow trees
Pollution
DDT – Bald Eagle/Brown pelican
Beluga whale – PCB’s Biomagnification –
accumulation of toxins as they move up the food chain
Habitat Loss Similar terms:
Habitat alteration Habitat
fragmentation
Superstitious beliefs
Check for understanding
What is the #1 reason that species become endangered?
How is a superstitious belief about an animal different from the medicinal argument for protecting a species?
What is biomagnification?What is the difference between subsistence
hunting and commercial hunting?How is hunting different from poaching?