Using authentic data to analyze genetic

variation in Antarctic sea stars.

Presentation created by Gisela Wolfe

Mar Vista High School 1

San Diego Science Project & Scripps Institution of Oceanography

Lesson Study 2014

Read: When you think of Antarctica, what types of organisms do you think of?

Imagine you are a science researcher in Antarctica, what would you study?

Read: When you think of Antarctica, what types of organisms do you think of?

Imagine you are a science researcher in Antarctica, what would you study?

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Bellringer

Copy: When I think of Antarctica, the types of organisms I think of are…

If I were a science researcher in Antarctica, I imagine I would study ……., because……

Copy: When I think of Antarctica, the types of organisms I think of are…

If I were a science researcher in Antarctica, I imagine I would study ……., because……

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Dr. Nerida Wilson, Scripps Institute of Oceanography

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Unusually deep continental shelf

All terrestrial input comes via glaciers or wind

Coastline dominated by ice (14% rocky)

Seawater temperature very low

How does Antarctica differ from other continents?

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Giant Petrel

Charismatic VertebratesCharismatic Vertebrates 8

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Black-browed albatross

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Using DNA to assess connectivity in

Antarctic marine invertebrates

Using DNA to assess connectivity in

Antarctic marine invertebrates

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RV Nathaniel B Palmer94-meter (303 feet) research ship with icebreaking capability for the U.S. Antarctic Program.37 scientists, has a crew of 22, and is capable of 75-day missions

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Straits ofMagellan

Straits ofMagellan

FalklandIslands

FalklandIslands

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What she collected and why?

Animals that were abundant

Animals that are known to occur along most of the Scotia Arc

Animals that have some data already available

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Blake Trawlafter

multibeaming

Main tool=

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First Ice

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‘normal’ haul‘normal’ haul

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Sometimes mud...Sometimes mud...24

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Sea stars: Labidiaster spp.

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Sea stars: Porania antarctica

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CrinoidsPromachocrinus spp.

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Sea cucumber Scotoplanes

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IsopodGlyptonotus antarcticus

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PycnogonidsColossendeis megalonyx

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PolychaeteLaetmonice producta

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Sea UrchinSterechinus

antarcticus/agassizi

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Bivalves:Lissarca notorcadensis

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Observe pictures of 5 different organisms.

•What kind of observations can you make about the organisms in these pictures? •What characteristics do they share? •What is different about them?

 Individually, box A (I observe…)

Be ready to share out responses….

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If you wanted to know how related these organisms are, what questions would you ask?

(Box A: My Questions: write responses individually ) 

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If you wanted to know how related these organisms from different sampling sites are to each other, what questions would you ask? Box your best question.Chart all of your individual questions/response onto your group CHART PAPER BOX A. Reach consensus on and box your group’s best question.

 Be prepared to SHARE

OUT…CHART class share-out

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Now look at the sea stars set of pictures…•What observations can you make about them•What characteristics do they share•What is different about them

(Write responses individually in Box B “I observe”)

•If you wanted to know how related sea stars are what questions would you ask? •(Write responses individually in Box B “My Questions”)

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Sea stars set of pictures…•If you wanted to know how related sea stars are to each other, what questions would you ask?

•Students box your best question on your paper, and then chart your individual best question onto CHART PAPER BOX B.

•Reach consensus and box your group’s best question.

•GALLERY WALK

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Genetic Data“Now look at the data of the sea stars. What information does this table tell you?”(Individually, box C “I observe”) Write down questions about data •(Individually, box C “My Questions”) Chart your individual questions/response onto CHART PAPER BOX C.  SHARE OUT…CHART IT AS A CLASS

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Genetic Data

•Using the data, physically arrange sea stars based on how related you think they are. •Note: connection between the genetic differentiation and the numbers is the smaller the number the closer related.

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Map1. Compare your grouping of the sea stars that you made on the table to their location on the map.

• What do you notice about the genetic data and their location on the map?

•(Individually, box D “I observe”)

• What questions do you now have?• What are you surprised about? What matches your prediction and what questions do you still have.

 (Individually, box D “My Questions”)

Chart your questions/response onto CHART PAPER BOX D.  Reach consensus & box your group’s best question.  GALLERY WALK 45

ConclusionBased on your observations, data, and questions which sea stars are more closely related. Cite 3 pieces of evidence. (Write your response in box E.)

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Exit Slip

•Which questions do you think helped build your conclusion? •Concluding Questions: How might these questions relate to the idea of "how organisms change over time"

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