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Environmental Science
Monday, January 25, 2016
Do)Now:&“Intro.(to(Semester(Two”(1. Write(down(today’s(FLT(2. What(do(we(study(in(environmental(science?((
If(you’re(not(sure,(make(a(guess.(3. Do(you(think(humans(have(a(responsibility(
to(help(the(environment?((Why(or(why(not?(4. What(grade(do(you(hope(to(achieve(this(
semester?((5. IdenJfy(what(you(are(going(to(do(in(order(to(
achieve(this(grade.(((
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Class&Reminders&• New(to(class?((Sign(&(Return(Syllabus(• Rule(reminders: ((– Stay(in(assigned(seat(– No(eaJng(or(chewing(gum((– No(electronics(• Get(assignments(stamped(within(a(week(of(receiving(them((
Planner: • Ch. 8 Vocab due by Mon 2/1 • Ch. 9 Vocab due by Mon 2/8 Table of Contents #5 1. Intro. to Semester Two Do-Now 2. Ch. 8 Vocab 3. Ch. 9 Vocab
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Standard • HS-LS2-6: Evaluate the claims, evidence, and reasoning
that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem.
FLT • I will be able to overview the main terms in
population ecology by completing Ch. 8 Vocabulary
Classwork&
• Begin(Ch.(8(Vocabulary((– Use(worksheet(OR(flashcards((flashcard(must(have(picture(+(word(+(definiJon)(
• Do(Ch.(9(Vocabulary(next(week((
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Environmental Science
Tuesday, January 26, 2015
Do)Now:&“Video(Notes:(PopulaJon(Ecology”(1. Write(down(today’s(FLT(2. What(is(a(“populaJon”?((Guess(if(you’re(not(sure.(3. How(big(do(you(think(the(human(populaJon(is?(((4. In(what(city((in(the(U.S.)(would(you(find(the(largest(
populaJon?((Guess(if(you’re(not(sure.(((5. In(what(city((world`wide)(would(you(find(the(largest(
populaJon?((Guess(if(you’re(not(sure.(((6. Number(1`4(underneath(your(do`now,(leaving(space(
Finished?))Take)out)your)planner)and)ToC.)))
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Popula?on&Facts!(• As(of(July(2015,(the(world(populaJon(was(esJmated(at(7.3(billion((• New(York(City(was(esJmated(to(have(a(populaJon(of(8.5(million(as(of(2014((compare(this(to(LA’s(3.9(million)(• The(city(of(Shanghai(has(an(esJmated(populaJon(of(24.3(million(• Worldwide,(NYC(only(ranks(as(the(21st(largest(city((
Annoucements&• New(to(class?((Syllabus(should(be(turned(in(• Reminders:((– Get(stamps(– No(electronics((– Want(to(be(exempt(from(Q3(midterm?((Have(70%+(on(each(test/project(and(have(less(than(5(missing(assignments(before(April(6th(((
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Planner: • Finish WS + vocab
Table of Contents #5 4. Video Notes: Population Ecology 5. 8.1 Notes A 6. Population WS A
Standard • HS-LS2-6: Evaluate the claims, evidence, and reasoning
that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem.
FLT • I will be able to describe the three main properties of
a population by completing 8.1 Notes A
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Video&Notes&
• We(will(watch(the(first(half(of(the(video(before(our(notes(begin,(then(the(second(half(during(the(notes(• Underneath(your(do`now,(make(sure(to(write(FOUR(FACTS(from(the(video(that(you(learn(• Be(prepared(to(share(out(your(facts((
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Video&Notes&
• Let’s(share(some(of(our(facts!(• Remember:(we(will(watch(the(remaining(secJon(during(our(notes,(so(you(can(sJll(add(facts(then((
8.1 Notes
• Noise level 0 • Copy down all bolded ideas • Raise your hand to question/comment • Be prepared to pair-share
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8.1 How Populations Change in Size
Describing Populations
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What is a population? • Population = A group of the same species
living in the same place at the same time • Ex/ All of the wolves in Yellowstone
Which is a population?
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Properties of Populations
• Populations may be described in terms of: – Size – Density – Dispersion
Population Size • Population Size = The total number of
individuals – Ex/ There are 400 wolves in Yellowstone
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Which population size is bigger?
Population Density • Density = the number of individuals per
unit area or volume • Ex/ There are 0.3 wolves per square mile
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Which population has greater density?
Population Dispersion • Dispersion = The arrangement of
individuals in a given space – Ex/ Wolves are found in clumped patterns because they travel in packs
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Population Dispersion – Dispersion patters may be uniform (even), clumped, or random
Population Dispersion Types – Clumped = organisms group together for protection or resources
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Population Dispersion Types Uniform = organisms are evenly spread out due to territoriality
Population Dispersion Types Random = no pattern
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How Does a Population Grow?
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Reproductive Potential Biotic Potential Reproductive Potential
The fastest rate at which a population
can grow
The maximum number of offspring each member can
produce
Reproductive Potential • A species’ biotic potential is limited by its
reproductive potential • The greater the reproductive potential, the
greater the biotic potential • Ex/ A bacterium can produce 19 million
offspring within weeks, making its biotic potential very great
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Pair-Share-Respond 1. Define the term “population” 2. What is the difference between population
density and dispersion? 3. Identify three patterns of population
dispersion 4. A flower’s pollen is spread by the wind.
What kind of dispersion pattern is this? 5. Distinguish between the terms biotic
potential and reproductive potential.
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CW
• Complete the population worksheet A • Finished? Work on your vocabulary !
Environmental Science
Thursday, January 28, 2015
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Do)Now:&“BrainPOP:(PopulaJons”(1. Write(down(today’s(FLT(2. In(a(savanna(region,(you(can(see(giraffes,(zebras,(and(
gazelles(all(eaJng(together.((Is(this(a(populaJon?((Why(or(why(not?(((
3. List(the(three(panerns(of(populaJon(dispersion(4. Choose(one(of(the(three(panerns,(and(diagram(it.(((5. What(kind(of(populaJon(might(exhibit(this(panern?(6. Number(1`10(underneath(your(do`now(
Finished?))Take)out)your)planner)and)ToC.)))
Planner: • 8.1 Quiz Mon 2/1 • Have assignments #1-9 stamped Table of Contents #5 7. BrainPOP: Populations 8. 8.1 Notes B 9. Population WS B
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BrainPOP:&Popula?on&Growth&• Watch(the(BrainPOP(video(• Aoer(the(video,(answer(the(quesJons(in(your(group(–(every(member(must(copy(down(the(same(answer(• The(group(with(the(most(correct(answers((+5(dojo(points(each(hMps://www.brainpop.com/science/ecologyandbehavior/
popula?ongrowth/&
(
Standard • HS-LS2-6: Evaluate the claims, evidence, and reasoning
that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem.
FLT • I will be able to define and diagram patterns of
population growth by completing 8.1 Notes B
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8.1 Notes
• Noise level 0 • Copy down all bolded ideas • Raise your hand to question/comment • Be prepared to pair-share
8.1 How Populations Change in Size
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Recall
What is a population? • Population = A group of the same species living
in the same place at the same time • Populations can be described in terms of their
overall size, density, and dispersion.
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How Populations Grow
How do populations grow? • Populations that grow rapidly can be
represented by an exponential growth model
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How do populations grow? • Exponential Growth = a period of time when a
population grows exponentially (increasingly faster) due to available resources
How do populations grow? • Exponential growth can only occur when
resources such as food, space, and mates are plentiful . • When these resources become limited, growth
will slow or stop.
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How do populations grow? • We can diagram
exponential growth by plotting population size over a period of time. • Exponential
growth will resemble a “J-shape” curve.
Limitations to Population Growth
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Limitations to Population Growth • Can a population continue to grow
indefinitely?
• Populations cannot grow indefinitely • Limited resources or environmental changes
can change growth patterns • According to natural selection, only some
members can survive and reproduce
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Limitations to Population Growth • Carrying capacity = maximum population size
that can be supported by an ecosystem.
• As resources become limited, growth slows until carrying capacity is reached • At carrying capacity, birth rates = death rates
(no net growth or decrease)
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Limitations to Population Growth • A population can fluctuate around the carrying
capacity, but resource limitations will maintain the population size
Limitations to Population Growth • Limiting resource/factor = a natural resource
used or consumed by the population that limits its growth • Ex/ The availability of prey
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Limitations to Population Growth • Members of the same population must
compete with each other for resources • Ex/ Plants compete with each other for light,
and wolves may compete for food/territory
Patterns of Population Change
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Patterns of Population Change • Population growth can decrease due to
limiting factors • These factors may be density-dependent or
density-independent
Patterns of Population Change • Limiting factors decrease population growth – Density-dependent limiting factors depend on the
population size.
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Patterns of Population Change • Limiting factors decrease population growth – Density-dependent LFs have a greater effect on
large, crowded populations – Examples: Competition, predation, parasitism,
disease
Patterns of Population Change • Limiting factors decrease population growth – Density-independent LFs affect a population no
matter the size – Examples: Natural disasters, seasonal changes,
human activities, unusual weather
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Pair-Share-Respond 1. What is “exponential growth” and what
causes it? 2. If you were to diagram exponential
growth, what would it look like? 3. What is a population’s carrying capacity? 4. What causes a population to reach its
carrying capacity? 5. Distinguish between density-dependent
and density-independent limiting factors.
CW
• Complete the population worksheet B • Finished? Work on your vocabulary !