GEOS 212 1st Edition Lecture 20 Outline of Last Lecture LECTURE 19 OUTLINE Intro to Marine Life 7 April Part 3 Life in the Oceans Controlled by processes in Part1 and Part 2 Part 1 Solid Earth Processes Make destroy ocean basins Rocks seds on ocean floor Seawater Chemistry Part 2 Atmosphere Ocean Processes Oceans are dynamic o Waves o Currents o El Nino La Nina o Hurricanes o Tsunami o Tides o Global Warming Huge energy transport Oceans well mixed Variations in o Temperature o Pressure o Salinity o Sunlight o Gases Earth is very dynamic planet lots of diverse physical environments Marine organisms are also very diverse and dynamic Connection Adaptation Evolution Physical factors that control form function of Life List at least 8 Three components of life 1 Organic materials Fluids mostly H2O salt Na Cl Fe K P Gases plants need CO2 animals need O2 Tissues mostly C H O some Ca Si K Fe Mg 2 All organisms need energy Photosynthesis CO2 H2O Organic material O2 energy from sun Respiration Organic material O2 CO2 H2O energy from food also from sun Chemosynthesis CO2 H2O H2S Organic material O2 energy from earth s heat 3 Information required to assemble bodies and to function DNA is the blueprint for how organisms grow and function Where did information originate Big Bad Table showing main events in life and Earth history These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Outline of Current Lecture LECTURE 20 OUTLINE Food Webs 9 April Overview of main events in the evolution of marine life from handout Summary of evolution Physical environment on Earth is continually changing Organisms evolve in form function to adapt to changes natural selection Gradual change accommodated by slow evolution Rapid change drives extinction followed by rapid evolution Information acquired from ancestors stored in DNA so successful traits are passed on Food Webs Trophic Pyramid Primary producers microscopic plants phytoplankton Primary consumers vegetarians e g krill Secondary consumers eat mostly animals Top predator Apex predator eats everything Trophic levels who you eat who eats you need to eat 10 pounds of food for every pound of you Biomass needed for vegetarians herbivores vs carnivores Current Lecture
View Full Document
Unlocking...