week 6, day 2 - Week 6 day 2 Geochemical cycle A...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Week 6, day 2 Geochemical cycle A geochemical cycle in which biological processes are involved Lithosphere + atmosphere + hydrosphere + biosphere Francis Bretherton Developed the Bretherton diagram Attempted to combine all of earth’s systems/cycles together o Previous attempts did not include the biosphere Terms Nutrients o An element or compound that organisms consume and require for survival o Nutrients move through all spheres Reservoir o A container or place for elements or compounds Flux o Transfer into or out of a reservoir per unit of time Turnover time o How long it takes for items to stay in a reservoir Three important biogeochemical cycles that influence things on earth 1. Nitrogen 2. Carbon 3. Phosphorus Nitrogen cycle Makes up 78% of the atmospheric gases 6 th most abundant element on earth o Essential ingredient in proteins and DNA Is chemically inert o Cannot cycle out of atmosphere and into organisms without assistance o Three mechanisms: 1. Lightning (natural) 2. Bacteria (natural) 3. Human intervention Figure 5.18 is the nitrogen cycle Nitrogen fixation Needed for atmospheric nitrogen to become biologically available 1.Lightning strikes 2. Nitrogen-fixing bacteria o Mutualistic relationship with legumes
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Figure 5.19 in the book Human intervention
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern