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AP Environmental Science

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- [Voiceover] You Look At A Community That Is In A Given Habitat, A Natural Question Is To Say, Well, Has That Community Always Been That Way? Has It Always Been There? Was There A Time Where Maybe There Was No Life There? And The Answer Is, Well, Yes, The Communities Do Change Over Time, And There Is Some Initial Period Where There Might Not Be Any Life In That Habitat, And Then Life Slowly Colonizes It, And The Makeup Of That Life Will Change Over Time, The Makeup Of That Community. And This General Idea Is Called Ecological Succession. Ecological Succession. And Folks Will Often Talk About The Different Types Of Ecological Succession, Splitting It Up Into Primary Ecological Succession, And So Primary Is When You Start With No Life, Because You Really Have A New Habitat, And Then Slowly Life Colonizes It. And The Best Example Of That, Or One Of The Best Examples Of That Is When New Land Forms Due To Lava Flows. There Are Pictures From Hawaii, Where New Land Is Forming As This Lava Hardens. And, At First, There Is, When It'S Molten Lava, There'S No Life There, Then It Hardens, And Slowly, Basic Life, Or Life In General, Will Start To Colonize That Lava Rock. And Some Of It You Won'T Be Able To See With Your Naked Eye, It Would Be Microbes, And Some Of It You Could See, It Could Be Simple Ferns And Plants Like That, And These Are Often Called The Pioneer Species. But What They Often Do Is Make That Environment More Suitable For Other Types Of Life. So They Might Slowly Break Down That Rock. As They Die, Along With The Broken Down Rock That Also Gets Eroded From The Water And The Air And The Rain, It Starts To Make Soil And Conditions More Suitable For Other Types Of Species. And These Pioneer Species, They Don'T Even Have To Just Be Plants And Microbes. I Was Just Reading An Article About How In Hawaii, Humans Want To Get That Land Because It'S Beachfront Property. Or The Beach Might Not Have Formally Formed In The Traditional Sense, But You Have Ocean View Property. So Humans Might Be Some Of The First Pioneer Species Who Might Wanna Be Out On That Land. And That New Land Doesn'T Just Form From Lava Flows. There Are Other Examples Of New Habitats Forming. So Right Here, We Have Pictures Of A New Habitat Forming Because Of The Retreat Of Glaciers. When The Glaciers Were Covering Up These Rocks, You Didn'T Have Life On Them. But As The Glacier Retreats Right Over Here, You See Things Like These Mosses And Other Types Of Pioneer Species Starting To Colonize. And Over Time, They'Re Going To Make It More And More Suitable For Other Types Of Species. So That'S Primary Succession. Another Situation Is When You Have Secondary Succession. And There'S Many Different Ways You Could Have Secondary Succession. One Of The Most Cited Examples Is When You Have Some Type Of A Disaster. And So This Right Over Here, This Is A Picture Of A Fire, So Here, We'Re Talking 'Bout Secondary Succession, Where You Had A Community, But Then You Have A Fire, And So That Fire Might Wipe Out A Lot Of The Community. And Then It Creates Space For Other Things To Form. So After You Have A Fire, The Forest Might Look Something Like This, And Then, Notice, You Have Species That Start To Colonize Where A Lot Of Other Species Might Have Died Or Died During The Fire. And Sometimes, After This Disaster Of Some Kind, You Might Get Back To The Same Type Of Community That You Had Before The Disaster, But Sometimes, It Could Be A Completely Different One, That The Communities Don'T Come About In Exactly The Same Way. So The General Idea Is Communities Change Over Time, We Have Ecological Succession. There Are Times Where There'S No Community, And Then They Come In, That'S Primary Succession. And Then, You Have Times Where You Have Disasters Of Some Kind That Could Change The Environment In Some Ways, And It Could Change The Makeup Of That Community. And Things Don'T Have To Be As Dramatic As New Land Formation Because Of Lava Or Because Of Forest Fires Or Even Glaciers Retreating. It Could Because Of A Disease, Or It Could Just Be Because A New Species Gets Introduced Somehow That Changes The Makeup, Changes The Competition, The Predatory, The Various, The Symbiotic Dynamics Within That Community.
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Finding and studying AP Environmental Science flashcards & notes from students and teachers on Knowt is super easy to do! We’ve got the perfect set of notes and flashcards for your every need - whether you’re preparing for a quick pop quiz or cramming for a huge midterm. If you’ve got a specific chapter or question in mind, use the search bar above to browse our millions of AP Environmental Science notes or flashcards. OR you can use the buttons at the top of this page to pick a specific AP Environmental Science and Unit 1: The Living World: Ecosystems, Unit 2: The Living World: Biodiversity, Unit 3: Populations, Unit 4: Earth Systems and Resources, Unit 5: Land and Water Use, Unit 6: Energy Resources and Consumption, Unit 7: Atmospheric Pollution, Unit 8: Aquatic and Terrestrial Pollution, Unit 9: Global Change to explore all the flashcard sets we’ve got on that particular topic. They’re all made by students like you taking the classes.
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Where can I find free AP Environmental Science flashcards?
If you’re on the hunt for the BEST flashcards for each AP Environmental Science topic, use the “Created By” filter on Knowt to check out AP Environmental Science flashcards made by Knowttakers that were handpicked by our team or verified knowt users!
Do you have notes and flashcards for AP Environmental Science classes?
Yes! We have free science flashcards for all the AP AP Environmental Science classes including Unit 1: The Living World: Ecosystems, Unit 2: The Living World: Biodiversity, Unit 3: Populations, Unit 4: Earth Systems and Resources, Unit 5: Land and Water Use, Unit 6: Energy Resources and Consumption, Unit 7: Atmospheric Pollution, Unit 8: Aquatic and Terrestrial Pollution, Unit 9: Global Change. To find those, you can use the exams tab in the navigation bar to find free study guides and flashcards for each exam.
Who makes the AP Environmental Science Flashcards on Knowt?
We want you to have high quality AP Environmental Science flashcards to study from, so we’ve handpicked top students studying AP Environmental Science at each level and worked with them to create verified AP Environmental Science flashcard sets! To find those, just use the filter button and switch to verified. You’ll also find millions of flashcards made by other students just like you studying AP Environmental Science who have made AP Environmental Science flashcards sets that they study from. There’s also thousands of flashcard sets made by teachers teaching AP Environmental Science that you can study from!