Download Lesson 1-4 PP resource

Year 10 – Unit 5:
OCEANS ON THE EDGE
Investigating the global pattern coral reefs or
how this has changed in the past 50 years.
Explain the global threats to this marine
ecosystem.
Text book 104 110
LESSON 1+2
Lesson Objectives:
• map the location of the world’s coral reefs
• accurately describe their location, using exam technique
• know the values of a coral reef (what they provide)
• to be able to recall facts about the Great Barrier Reef
Types of ocean environments
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Deep Ocean
Continental Shelf
Barrier Reef
Estuaries
Mangroves
Salt Marsh
1. Why are coral reefs found near the surface?
2. How many different species are found in coral reefs?
3. Why are coral reefs described as the “Rainforests of the
ocean”?
Blank map
Don’t forget to give your map a Title Key and Labels
Using the map below, shade the areas of the world, on your
blank map, where you find coral reefs. Add tropics and
equator
Don’t forget to give your map a title Key and labels
Answering exam questions
1. Study your map showing the location of coral reefs.
Identify the main areas where coral reefs occur. (3
marks)
2. Explain why coral reefs are found in one of the areas
you identified (2 marks)
3. Identify 10 ways that humans use coral reef and the
risks this may cause to the ecosystem
4. Suggest how the distribution of reef ecosystems may
change over the next century
TYPES OF OCEAN ENVIRONMENT.
Biodiversity, value and threat level
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Deep Ocean
Continental Shelf
Barrier Reef
Estuaries
Mangroves
Salt Marsh
• Bio-diversity levels
Rainforest of the Ocean? The
Great Barrier Reef
The Great Barrier Reef is the
world's largest reef system
composed of over 2,900
individual reefs and 900 islands
stretching for over 2,600
kilometres over an area of
approximately 344,400 square
kilometres
This reef supports a
wide diversity of
life, and was
selected as a World
Heritage Site in
1981.
Over 1500 species of fish live on the
Great Barrier Reef, representing 10%
of world fish species.
The reef is located in the Coral
Sea, off the coast of
Queensland in northeast
Australia.
The Great Barrier Reef is a
nesting ground for
endangered species like green
and loggerhead turtles and a
breeding ground for
humpback whales.
The Great Barrier Reef supports a diversity
of life, including many vulnerable or
endangered species, some of which may
be endemic to the reef system.
Tourism
Magnet for world’s tourists
Countries in the Caribbean get over half
their income from reef tourism
Education and
research
Learn about
marine life
Other uses
Medicine source
To make decorative objects such as jewellery
A source of lime for cement and building
Exploitation for fishing
4000 species of fish provide
food
25% of world’s commercial fish
catch comes from coral reefs
Shoreline protection
Provide protection
from storms,
tsunami and wave
erosion.
Can grow with rising
sea levels, protect
against climate
change
Aquarium trade
Supply tropical fish, sea
horses and plants for our
fish tanks!
WHAT ARE THE MAJOR THREATS TO CORAL REEFS AND WHICH ARE MOST SEVERE?
Acti
teac
inte
To understand, we need to investigate physical
processes within marine environments…FOOD
WEBS and NUTRIENT CYCLING
What are the features of a marine ecosystem?
Watch the following video and add to your
definitions for the following living parts of an
ecosystem:
producers
consumers
predator
prey
decomposers
Carnivore
Herbivore
Omnivore
Define these common features of marine
ecosystems with examples….
Food web and Nutrient Cycling?
L2: GLOBAL THREATS TO OCEAN
ENVIRONMTNES?
• Go through book pgs 105 110
• What are the key threats?
• How are they damaging
these environments? Are
they threatening their
existence?
• Deep Ocean
• Continental
Shelf
• Coral Reef
• Estuaries
• Mangroves
• Salt Marsh
THREAT 1: Overfishing
Describe + Explain
DescribeExplain
+ Explain
why this is a
problem
Aqua-culture
Explain why this is a
problem
Eutrophication
Eutrophication : Marine dead zones
Plastics and Pollution
Plastic islands 1
Tourism Impacts
Oil Extraction
Climate Change - Bleaching
CLIMATE CHANGE : Other
effects of climate change on
oceans?
Higher
Sea Levels
Warmer
Water
Acidity
and
Bleaching
Complete notes from
pg 109
GLOBAL THREATS TO OCEAN
ENVIRONMENTS?
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Farming
Overfishing + trawling
Agriculture
Eutrophication
Aqua Culture
Pollution – Plastics, Oil,
Climate change
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Deep Ocean
Continental Shelf
Coral Reef
Estuaries
Mangroves
Salt Marsh
How are ocean food web and nutrient cycling affected by
threats?
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