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23 Cards in this Set
- Front
- Back
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How much has the human population increased since the Industrial Revolution?
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Went from 1 Billion to 6 billion
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What effect did humans have on the Nitrogen cycle?
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Doubled N2 fixed into the cycle, mainly because of fertilizer maufacture and use
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What effect did humans have on the Sulfur cycle?
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Doubled sulfur dioxide entering the atmosphere, mainly bc of fossil fuel use
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What effect did humans have on the Carbon cycle?
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CO2 has increased 36% bc of fossil fuel combustion
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What is the Nitrogen cycle stimulated by?
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fertilizer and sewage
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what does eutrophication (nitrogen cycle) cause?
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dead zones and toxic algae blooms in estuaries
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What is Nitrous oxide and what does it do?
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greenhouse gas, destroys stratospheric ozone
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Why is nitrate bad in groundwater?
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toxic in drinking water
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Harmful algae blooms:
often called what where have they increased due to what |
Red tides
coastal areas dinoflagellates |
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Where does Brevetoxin come from?
what does it do to organisms? |
Gymnodinium Breve, Gulf of Mexico
Food poisoning, respiratory problems |
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How does Ciguatoxin get spread?
which fish does it affect? |
attached to seaweed, consumed by reef fishes stored in their livers.
groupers, snappers, baracudas |
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What are the symptoms of Ciguatoxin?
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headache, nausea, low blood pressure, hot/cold reversal, convulsions, paralysis, death
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What does Saxitoxin cause?
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Paralytic Shellfish Poisoning
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What species is Saxitoxin accumulated by?
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clams, oysters, mussels
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How does Saxitoxin hurt you?
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blocks nerve transmission, death by respiratory failure
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Is Saxitoxin destroyed by cooking?
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no
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What is Pfiesteria piscidia commonly referred to as?
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Cell from Hell
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Where has Pfiesteria piscidia killed many fish?
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Started off NC coast, off Atlantic coast and esp Chesapeake Bay
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What effects does Pfiesteria piscidia have on humans?
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Neurotoxic: sores, memory loss, respiratory distress, vertigo
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What animals does Tetrodotoxin occue in associaton with?
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reef fishes (puffers, sunfish, porcupine fish), blue ringed octopus, newts, frogs
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Who eats fish with TTX
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the crazy japanese
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What is Palytoxin associated with, and what is it probably synthesized by?
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Hawaiian coral, bacterium
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What did Natives used to do with Palytoxin?
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apply it to tips of spears before battle
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