Bellringer09/29/2014

How may human activities affect marine ecosystems?

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.

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

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.

Human Dependenceand Modification

2 Major Systems:

•Ocean currents

•Ocean food webs

Human Modifications

Run Off and Pollution-Phosphorus/Nitrogen• Too much fertilizer used in

farming• Too much algae growth

-Harmful Algal Blooms“Red Tides”

http://www.youtube.com/watch?v=eozVMJCYHCM

STORMWATER RUN OFF

The Great Pacific Garbage Patch

• http://www.youtube.com/watch?feature=player_detailpage&v=XxNqzAHGXvs

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

What shark finning looks likehttp://www.youtube.com/watch?

v=U0qkr2cIe5c

What would happen if sharks disappeared?http://www.youtube.com/watch?

v=yzlqXMateRE

OVERFISHING

• What happens if sharks disappear?• http://www.youtube.com/watch?v=yzlqXMateRE

Shark Fins

Human Modifications

Artificial Reefs• human-made underwater structure, typically

built for the purpose of promoting• marine life• Texas Clipper

Artificial Reefs

http://www.youtube.com/watch?v=3ofyD1gldbg

http://www.youtube.com/watch?v=Q97IAUHICjo

Texas Clipper Sinking Video

Human Dependence

We depend on the ocean for:

1. Oxygen!• Phytoplankton

contribute 70-80% of the oxygen to Earth’s atmosphere.

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

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

October 2, 2013

• What is the result in the relationship between mussels as the zebra mussel invades Texas lakes?

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.

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

Ocean Currents

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.

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

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

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