Question

Bio 305 Lecture homework Unit 2 (Exam material) HW due day 13 For this homework, please see the file called Carbon and Nitrogen Cycles.pdf and complete the following three pages of this handout. Carbon and Nitrogen cycles: Each cycle has sinks (reservoirs) and processes that move atoms between the reservoirs. Slide 1. Carbon Reservoirs: What do you think the word "reservoir" means? Alura natural orartstical take used as a source ofuatly Carbon atoms exist in each of these reservoirs. For each reservoir, I've listed a few of the molecules you'd find carbon in, and your job is to look at the slides and fill in how many gigatons of carbon each reservoir holds. Terrestrial Vegetation (carbon would be in the form of wood, sugars, starches, etc) 666 gigatons Atmosphere the thin layer of gases that surrounds our earth-carbon would be part of the molecules CO, and CH4 gigatons (pre-industrial) Soils (carbon would be in the decomposing organisms and plant debris in these soils) gigatons Sediments and Rocks, such as carbonate rocks sigatons Mixed ocean layer gigatons Deep ocean gigatons Slide 2. The carbon cycle without anthropogenic (human caused) disturbances. How many sigatons per year are taken up by vegetation from the atmosphere? How many gigatons per year are released by vegetation back to the atmosphere? Slide 3. IPCC diagram of the global carbon cycle 3a. What does IPCC stand for, and what does it do? 3b. What do black numbers and arrows represent?

Answer 1

Slide 1.
Reservoir: The abiotic environment which contain the carbon or nitrogen like elements in large quantities and from which they flow into biotioc components of the ecosystem is called reservoir.

Terrestrial vegetation or land plants contains 500 gigatrons of Carbon.

Atmosphere contains 121 million gigatrons of Carbon.

Soils contains 2,500 gigatrons of the carbon.

Sediments and rocks contain 78,000,000 gigatrons of the carbon.

Mixed ocean contains 37,100 gigatrons of the carbon.

Deep ocean contains around 150 gigatrons of Carbon.