Title: Biological%20diversity%20is%20reflected%20in%20the%20variety%20of%20life%20on%20Earth
1Biological diversity is reflected in the variety
of life on Earth
2List 10 words or phrases that come to mind when
you hear the word BIOLOGICAL
List 10 words or phrases that come to mind when
you hear the word DIVERSITY
3Section 1.1 Examining Diversity
http//www.youtube.com/watch?vvGxJArebKoc
http//www.learnalberta.ca/content/seetb/html/unit
_a/index.html?pagefeatures ? Video on diversity
of life
4Species!!!
- Biologists have identified more than 1.5 million
species of animals, and 350 000 species of
plants. - What is a Species??
A species is a group of organisms that have the
same structure and can reproduce with one another.
5- Regardless of how unique they may appear, all
life forms share certain characteristics - What are they?
- All living things are made up of _______.
- They need _______ to grow and develop.
- They ___________.
- Have ___________ that suit them for the
environment in which they live.
cells
energy
reproduce
adaptations
6Biological Diversity refers to.
- All the different types of organisms on Earth.
- However, scientists dont usually examine the
entire Earths biological diversity. - They examine it in smaller groupings.
7Diversity Between Ecosystems
- In an ECOSYSTEM, living (biotic) things interact
with other living and non-living (abiotic) things
in a shared environment. - Abiotic?? (air, water, sunlight)
- Biotic (anything living)
8Diversity Within Ecosystems
- When members of a species live in a specific area
and share the same resources, these individuals
form a POPULATION. - Ex school of fish, herd of zebras
- When populations of different species live in the
same area, these populations form a COMMUNITY. - Ex Africa lions elephants, zebras, giraffes
all live in the same area
9Diversity within Species
- A species is a group of organisms that all have
the same basic structures. - However, if you look closely at any population,
you will notice that there are subtle VARIATIONS
between individual members of the population. - Look at our class! Were the same species, do we
all look identical? - What about dogs?
10Genetic Diversity
- GENETIC DIVERSITY refers to the variations
between members of a populations. - In any population, these variations are for the
most part, caused by subtle variations in the
cells of the organisms. - Banded Snails have great visible genetic
diversity. Color, and bands. - People not visible, but very different blood
types.
11Controlling genetics?
- In some cases, humans have purposely reduced the
amount of variation between individual organisms. - Why would we do this?
- So that the individuals who have the same useful
characteristic reproduce more. - Can you think of any?
- Dog breeding
- Plants/crops
12Should we be concerned about people controlling
the genetic diversity of plants and animals? Why
or why not??
Yes, because if a population lacks genetic
diversity, then it might not be able to survive
environmental change and reproduce. Example
genetically identical crops are unable to deal
effectively with changing conditions or diseases
without help. 1916 Spring wheat crops were wiped
out in Canada. 1846 Irish potato famine
13Species Distribution
- The species on our planet are not all distributed
evenly. - Areas around the EQUATOR have the greatest number
of plant species. - Because of this, it provides food and shelter to
a wide variety of organisms. - The number of organisms is greatest in tropical
regions.
14The TROPICAL rainforests NEAR the EQUATOR contain
the greatest biodiversity.
15Check and Reflect
- Page 15
- Questions 1, 2, 5, 6, 7
16Classifying Biological Diversity
17What does it mean to classify something?
- To put into groups or arrangement for a
particular reason. - In our everyday lives, we classify various
things. - Ex In our kitchen food in one area, dishes in
another. Within each of those areas, we classify
further - Music Country, Rock, Pop, Hip Hop
Why would we classify things?
18Lets classify the class
- With a partner, classify the chocolate bars.
- Must have at least 3 levels of organization.
- Must be able to individually separate out each
one.
Lets classify chocolate bars!!
19Carolus Linnaeus
- In the 18th century he developed a system for
naming and classifying organisms. - He used Latin.
- Why??
- It was the common scientific language of his
time. - Brought world wide consistency to the naming of
species.
20Two words name each living thing
- First word name of the genus (always
capitalized) - Second word the particular species (never
capitalized) - No two species can have the same name.
- Closely related species can have the same genus
name but not species name. - Ex timber wolf Canis lupis
- domestic dog Canis familiaris
21- Linnaeus arranged species into groups based on
their physical structure rather than their
habitat (which earlier systems had done). - Because the same Latin names are used worldwide,
each scientist will know which species another
scientist is discussing.
225 kingdom system
- Animalia (animals)
- Plantae (plants)
- Fungi (yeasts, molds and mushrooms)
- Protista (mostly single-celled organisms)
- Monera (bacteria)
23Classifying further
- Each kingdom is classified further into
- Phyla
- Class
- Order
- Family
- Genera (genus)
- Species
- Example
- White spruce
- Kingdom Plantae
- Phyla Coniferophyta
- Class Pinopsida
- Order Pinales
- Family Pinaceae
- Genus Picea
- Species Pincea glauca
24Pneumonic Devices
- Used when trying to remember an order of terms of
facts. - How can we remember the order of Kingdom, Phyla,
Class, Order, Family, Genus, Species?
25Classifying Pneumonic Device
Kingdom King Kids
Phyla Phillip Prefer
Class Came Cookies
Order Over Over
Family For Fried
Genus Great Green
Species Spaghetti Spinach
26classification rap ?
27Biological Diversity under the Sea
- Coral reefs have been called the amazons of the
oceans because of the richness of their species
diversity. - Like tropical rainforests, coral reefs support
different communities of organisms surviving on a
small amount of nutrients, which are very
efficiently recycled.
28Coral reefs
- Coral polyps form the living layer of the reef
- Calcium carbonate form the hard parts.
- They can be massive and thousands of years old.
29Check and Reflect
30Interdependence
- No species can survive by itself. Each species
is dependent in many other species in its
environment.
Symbiosis is the science term for an association
between members of different species. (sym
meaning together, bio meaning life)
31Commensalism
32 33Mutualism
34(No Transcript)
35Parasitism
36(No Transcript)
37The Human Bot Fly Maggot - Eye. Anterior
Orbital Myiasis Caused by Human Botfly in the
Archives of Ophthalmology, detailed the growth of
a bot-fly maggot within this unlucky 5-year-old's
eye orbit. Doctors removed the creature under a
general anaesthetic
38Interdependence
391.2 Interdependence
- Symbiotic relationship song
Organism 1 Organism 2 Example
Commensalism nothing Clown fish and sea anemone
Mutualism Bumble bee and flower
Parasitism - Mosquito and human or aphids and wasps
401.2 Interdependence
- Green booklet p. 7-8
- Any specific questions???
- What is Competition?
- What is resource partitioning?
- What is a niche?
41Variation within Species
42- You already know that the stability of an
ecosystem relies on the diversity of its
communities and species and on the interactions
between species. - But even further, there is variation within a
population of a single species. - Variation within a species is called variability.
43We are all Giraffes!!
- The only food we eat is high in the trees.
- Scenario one every giraffe is the same. All have
short necks. What will happen to the species? - They will all die
- Scenario two Variation Some long some short
necks. What will happen to the species? - Only the long necks will survive and reproduce
44We are all Rabbits!!
- We need to be able to hide from predators in both
the winter and the summer. - Scenario one We are all the same. We are brown
all year round. What will happen to the species? - We will get eaten in the winter because well be
easily spotted by predators. - Scenario two Variation some are white all year,
some are brown all year, some are white in
winter, and brown in summer. What will happen?
Why? - Only the ones whos fur changes color will
survive and reproduce, they can hide from
predators in all seasons.
45We are all bacteria!!
- Scenario one We are all identical. A scientist
randomly chooses one bacteria to study. He/she
develops an antibody to kill that type of
bacteria. - The doctor administers the antibody to all the
bacteria. What happens to the bacteria??? - All of the bacteria will be killed.
46We are still all bacteria!!
- Scenario two Variation this time there are
three variations of the bacteria. A scientist
randomly chooses one bacteria and develops an
antibody to kill that bacteria. - A doctor then administers the antibody to all the
bacteria. What will happen to the bacteria? - Only the ones that match the chosen one will die.
The rest will survive and reproduce.
47Super bugs!!!!
- Researchers think that the over-prescription of
antibiotics has allowed bacterial populations
with variation survive. - The few resistant bacteria that are not killed,
reproduce and now become a whole population of
resistant bacteria. - Creating super bugs!!
- Most physicians believe that antibiotics should
only be used when absolutely necessary.
48Natural Selection
- Natural selection occurs when the environment
selects which individuals will survive long
enough to reproduce. - From our demonstration today, explain how natural
selection occurred in the giraffes, rabbits, or
bacteria.
49Check and reflect
- Page 24
- Questions 1-5
- Practice PAT questions
- SMARTboard