Env Sci Week 20 - Environmental...

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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 !