New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Ecology Week One

by: Katlyn Burkitt

Ecology Week One Biol 202

Marketplace > Towson University > Biology > Biol 202 > Ecology Week One
Katlyn Burkitt
GPA 3.2
View Full Document for 0 Karma

View Full Document


Unlock These Notes for FREE

Enter your email below and we will instantly email you these Notes for Intro to Ecology and Evolution

(Limited time offer)

Unlock Notes

Already have a StudySoup account? Login here

Unlock FREE Class Notes

Enter your email below to receive Intro to Ecology and Evolution notes

Everyone needs better class notes. Enter your email and we will send you notes for this class for free.

Unlock FREE notes

About this Document

These are the notes from the first week of Ecology. They are not meant to replace reading the chapter or coming to lecture however but are to be a supplement to your own notes.
Intro to Ecology and Evolution
J. LaPolla
Class Notes




Popular in Intro to Ecology and Evolution

Popular in Biology

This 4 page Class Notes was uploaded by Katlyn Burkitt on Saturday February 6, 2016. The Class Notes belongs to Biol 202 at Towson University taught by J. LaPolla in Spring 2016. Since its upload, it has received 99 views. For similar materials see Intro to Ecology and Evolution in Biology at Towson University.


Reviews for Ecology Week One


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 02/06/16
Chapter 26 Biology Notes  Debris from a meteor hitting earth formed the moon (4.6 BYA)  Atmospheric temperature is 2000˚C  Increased CO2caused Increased temperature  Decreased CO 2aused decreased  Weathering increases in hot wet conditions and pulls2CO from the atmosphere  Plates o Ridged slabs of rock that forms earths crusts  Plate tectonics o The movement of plates  Supercontinents o Rodinia: All continents, during the Proterozoic era (early life)  Broke up during 650 MYA o Gondwana: All southern hemisphere continents o Pangea: All continents  Phanerozoic = Visible life o 12% of earth’s history  Paleozoic era/ Cambrian period = High diversification of multicellular life  Birds and mammals o 4% of earth’s history  Humans o .2% of earth’s history  Fossils are dated by the half-life’s of their isotopes o Carbon dating, uses carbons half-life which is 5700 years  How did life originate? o Arose from early waters filled with ammonia, formaldehyde, folic acid, cyanide, methane, hydrogen sulfide, and organic hydrocarbons o Meteorites may have brought some of the organic molecules  Example Tagish with 3% of its mass being organic molecules o Reducing Atmosphere (high hydrogen content)  Makes forming molecules easier o Miller and Urey Experiment  Step 1: Assembled a reducing atmosphere  Step 2: Placed atmosphere over liquid water  Step 3: Maintained at a temperature bellow 100˚C  Step 4: Simulated lightning  This created small organic molecules and amino acids  RNA was the first nucleic acid that promoted self-replication  Early membranes were made of fatty acids  Craton: A rock layer of undisturbed continental crusts o Microfossils  Stromatolites: Sedimentary deposits held in place by mats of micro-organisms  Carbon Fixation: Changing inorganic carbon to usable organic carbon o Done by the Calvin Cycle and the reductive Krebs cycle  Organic molecules are biomarkers o Example Hydrocarbons from fatty acids  Climate: Temperature and water availability  Atmosphere: Levels of 2 and CO2 o Volcanic Eruptions alter the atmosphere  Highest temperature of earth was 2000˚C  Lowest temperature of earth was -50˚C  Snowball Earth: Ice or glaciers  Glaciation results in massive extinctions  Oxygenic photosynthesis produced O e2couraging the evolution of cellular respiration Increased O2in the atmosphere caused O t2 interact with UV rays forming O 3r Ozone Lecture Notes 2-3-16  1 Eon: Hadean (4.6 to 4bya) o Beginning of a cooling earth o No liquid water o CO2levels dropped and liquid water formed marking the end of the Hadean eon  2 Eon: Achaean (4bya to 2.5bya) o The first living things appeared as single celled organisms o The Atmosphere of earth changed rd  3 Eon: Proterozoic (2.5bya to 542mya) o Multicellular life emerges o Continued changes in earths atmosphere  4 Eon: Phanerozoic (541mya to the present) o Changes in the multicellular life o Extensive diversity o Cambrian period  Begins with complex multicellular life  The weathering of rock pulls CO2from the atmosphere where it mixes with water to form H C2 3 or hydrochloric acid which comes down in the form of acid rain and reacts with the rocks and travels down into the ocean where it reacts with 2a to form CaCO3which forms the bodies of many organisms such as shellfish.  Fossils o Rock fossils: Organisms barried in sediment  Their tissues mineralized  Calcium bone/shells  Surrounding sediment hardens into rocks o Amber Fossils  Fossilized tree resin  Things are caught in the resin  These fossils are younger along about 120mya o How are they dated  Through Stratigraphy which produces a relative age  The most recent fossils typically are the most recent  Through Radioactive decay which produces and absolute age  Radioisotopes o They are unstable and break down into something else through a half life o A half-life is where one half of the original isotope has turned into the daughter isotope 14 14 o Examples: C turns into N over the course of 5730 years 238 206  U to Pb over the course of 4.5bys


Buy Material

Are you sure you want to buy this material for

0 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Janice Dongeun University of Washington

"I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.