Land to Sea Mystery...Land to Sea Mystery Searching for the Source of Pollution . C. Casey ....
Transcript of Land to Sea Mystery...Land to Sea Mystery Searching for the Source of Pollution . C. Casey ....
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Land to Sea Mystery Searching for the Source of Pollution
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C. Casey
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Pollutants from land
• Toxoplasma gondii – a parasite that causes neurological problems in California sea otters • Source: released in felid (cat) feces and enters the ocean
in runoff water
• Conclusions: Wild cats are involved in infecting sea otters, BUT domestic cats are also known to carry it
G. Zawacki V. Yovovich
Still unsolved: How does the parasite get from the water into the sea otter?
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Pollutants from land
• Domoic acid – a toxin that causes brain damage and seizures in California sea lions • Source: Released by harmful algal blooms (HABs) in
rivers or the ocean
• Conclusions: nutrients are often from agricultural fertilizers, BUT also from natural sources
(left) A healthy sized hippocampus of a sea lion
(right) shrunken hippocampus of a sea lion brain as a result of domoic acid toxicity (Marine Mammal Center)
Still unsolved: How to reduce HABs without negatively affecting agriculture?
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Map Components
• Scale
• Legend
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Actions to Minimize Land to Sea Pollution
Personal: Join beach clean-up groups, don’t pollute, use fewer chemicals, don’t flush cat litter, participate in conservation groups.
Charitable: Support local conservation groups.
Political: Tell your representatives that you support a healthy environment