Transcript What you will learn today - Milton

Learning Targets
“I can…”
• Define “biodiversity”
• List the four levels of biodiversity
• Provide an example of each of the four
levels of biodiversity.
• State the five biggest threats to
biodiversity in our world.
• Explain how species diversity is decreased
by human disturbance under most
circumstances.
Biodiversity
Chapter 6: Humans in the
Biosphere
Biodiversity in the Gorongosa
Biodiversity in Gorongosa
At least 200 species of ants live in Gorongosa National
Park, including the African Weaver ant (Oecophylla
longinoda). These ants build football-sized nests in trees by
weaving leaves together with silk produced by their larvae.
The nest contains the queen’s chamber, a nursery for the
larvae, and a storehouse for prey. Weaver ants attack
snails, grasshoppers, beetles, and even snakes. They have
also been used to control agricultural pests such as fruit
flies that damage citrus fruits and other crops. Moreover,
the ants themselves are an excellent source of protein and
fatty acids and are consumed in some societies as a
delicacy. Small animals like ants mostly escaped the
ravages of the Mozambique civil war.
Article Questions
1. What affect does elimination of big
grazing mammals, such as elephants,
have on the Gorongosa ecosystem?
2. Why is it beneficial to have genetic
diversity in a species?
3. What is sustainable development, and
give an example of how the Gorongosa
aims to achieve sustainable
development?
What is biodiversity?
1. Biodiversity is:
a. the variety or richness of life at all structural
levels (molecular/genetic, species, ecosystem).
b. an essential renewable resource.
c. exploited and depleted by human activities
2.The current rate of biodiversity loss is
comparable to previous extinction events.
What is
Biodiversity?
Journey through the
Ndoki Forest
What is Biodiversity?
3. The variety of life at all levels of organization
a.Genes
b. Individuals
c. Populations
d. Species
e. Communities
f. Ecosystems
g. Global
What is Biodiversity?
4. Example
• California
• Congo
Biological Diversity
Worksheet
How do humans affect
biodiversity?
How do humans affect
biodiversity?
H
Habitat loss, including that caused by human-induced
climate change.
I
Invasive species harmful aliens, including predators,
diseases, and competitors that displace native species
P
Pollution Oil spills, human agricultural waste,
fertilization, pesticides, acid deposition, greenhouse
gases etc
P
Population, Human overpopulation to be exact, a root
cause of the other four factors
O
Overharvesting, Overuse hunting, fishing, gathering
References
• http://www.ngsprints.co.uk/images/M/459860.jpg
• http://www.digitalfrog.com/resources/archives/strata.jpg
• http://www.geography.hunter.cuny.edu/~tbw/wc.notes/15.climates.v
eg/veg.images/rainforest/rainforest.structure.diagram.jpg
• http://www.hhmi.org/biointeractive/putting-foodtable?utm_source=BioInteractive+News&utm_campaign=ecda1a5c
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erm=0_98b2f5c6ba-ecda1a5c54-69212481