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Bellringer. 09/29/2014 How may human activities affect marine ecosystems?. Bellringer. 09/29/2014 How may human activities affect marine ecosystems?. Runoff may carry oil or gas from roadways and fertilizer from fields into gulfs and oceans. - PowerPoint PPT PresentationTRANSCRIPT
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Bellringer09/29/2014
How may human activities affect marine ecosystems?
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Bellringer09/29/2014 How may human activities affect marine ecosystems?
Runoff may carry oil or gas from roadways and fertilizer from fields into gulfs and oceans.
Overharvesting causes fish populations to be removed faster than they can reproduce.
Artificial reefs can provide a habitat or location for food and protection from predators for marine life.
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TEST REVIEW TEK 8.11CShort Term and Long Term
Environmental Change
Test Corrections Procedures
- Complete Test Correction Page(s)- Use Complete Thoughts & Sentences
- Demonstrate YOU KNOW WHY THE CORRECT ANSWER is CORRECT!!!
ALL CORRECTIONS DUE WEDNESDAY 10/1/2014
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8.11D - Recognize human dependence on ocean systems and explain how human activities such as runoff, artificial reefs, or use of resources have modified theses systems.
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Human Dependenceand Modification
2 Major Systems:
•Ocean currents
•Ocean food webs
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Human Modifications
Run Off and Pollution-Phosphorus/Nitrogen• Too much fertilizer used in
farming• Too much algae growth
-Harmful Algal Blooms“Red Tides”
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http://www.youtube.com/watch?v=eozVMJCYHCM
STORMWATER RUN OFF
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The Great Pacific Garbage Patch
• http://www.youtube.com/watch?feature=player_detailpage&v=XxNqzAHGXvs
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Over-fishing -Harvesting a fish population to a point of diminishing returns
•Disrupts the food web•May cause organisms to
migrate to other areas
Human Modifications
http://www.youtube.com/watch?v=F6nwZUkBeas
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What shark finning looks likehttp://www.youtube.com/watch?
v=U0qkr2cIe5c
What would happen if sharks disappeared?http://www.youtube.com/watch?
v=yzlqXMateRE
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OVERFISHING
• What happens if sharks disappear?• http://www.youtube.com/watch?v=yzlqXMateRE
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Shark Fins
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Human Modifications
Artificial Reefs• human-made underwater structure, typically
built for the purpose of promoting• marine life• Texas Clipper
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Artificial Reefs
http://www.youtube.com/watch?v=3ofyD1gldbg
http://www.youtube.com/watch?v=Q97IAUHICjo
Texas Clipper Sinking Video
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Human Dependence
We depend on the ocean for:
1. Oxygen!• Phytoplankton
contribute 70-80% of the oxygen to Earth’s atmosphere.
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Human Dependence
We depend on the ocean for:2. Weather
• The oceans absorb a lot of energy from the sun.
• Warmer water = more evaporation = more rain
• Cooler water = less evaporation = less rain
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Human Dependence
We depend on the ocean for:3. Food
•Seafood provides a lot of world’s protein.4. Transportation
•most of the worlds goods are transported by ship
5. Recreation•Many countries main source of income is
through ocean tourism
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October 2, 2013
• What is the result in the relationship between mussels as the zebra mussel invades Texas lakes?
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Ocean Impact Education Post Pre-AP
• You will be creating educational posters for the school halls. 1. These posters will use photos, drawings, diagrams, and text to
explain a human impact to the ocean. 2. Choose from runoff pollution, invasive species, or
overharvesting. Explain it to someone who has never heard of it before.
3. What is the problem, and how have humans caused it? What are some consequences?
4. The posters will also explain how this impact can be reduced, and what students can do to help.
5. Due Friday. We will work on it for a short amount of time tomorrow and Thursday.
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Ocean Systems Human Depend Upon
• Oxygen Production• Coral Reefs• Mangrove Swamps• Estuaries• Currents• Wind Patterns• Evaporation & Precipitation• Marine Life• Storage & Exchange of Gases (N & CO2)• Sea Ice• Seasonal Weather Patterns
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Ocean Currents
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Mangrove SwampsBiodiversity
• Biodiversity• Produce seafood, fruits,
medicines, fiber, and wood. • Stabilize shores by trapping
sediments and building land.• Improve water quality by
filtering runoff and polluted waters.
• Protect the climate by absorbing carbon dioxide and reducing the amount of greenhouse gas.
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Estuaries – where freshwater streams and rivers flow into ocean
• Biodiversity• Recreational Fishing• Shellfish Breeding
Grounds• Protection from Flood
Waters• Filter Runoff• Environmental,
Commercial, and Recreational Benefits
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Human Impacts on Ocean Systems• Coastal Development• Aquaculture (fisheries)• Commercial & Recreational Fishing• Burning of Fossil Fuels• Deforestation• Introduction of Invasive Species• Agricultural Waste and Pollution• Oil Spills• Trash Pollution• Urban Runoff via Storm Drains• Raw Sewage Pollution• Industrial Pollution
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Consequences• Extreme Storms• Dead Zones• Ocean Acidification• Human Displacement• Collapsed Fisheries• Habitat Destruction• Change in Precipitation & Weather Patterns• Disrupted Gas Storage and Exchange• Human Health Issues• Extinction and Loss of Biodiversity• Siltation• Garbage Patches
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