ENVIR101 Lecture 2 Carbon Cycle Spring 2025 PDF
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Uploaded by SteadfastEcoArt4504
Duke University
2025
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Summary
This document appears to be a set of lecture notes for a course on environmental science or biology. The lecture notes cover the carbon cycle, including topics such as trophic levels, respiration, and the global carbon cycle.
Full Transcript
A pyramid in terms of — the number of organisms, rather — amount of biomass in each level — The pyramid is a general model Respiration Respiration is similar to combustion of fuels. Glucose is oxidized back to CO2. Glucose fuels respiration and l...
A pyramid in terms of — the number of organisms, rather — amount of biomass in each level — The pyramid is a general model Respiration Respiration is similar to combustion of fuels. Glucose is oxidized back to CO2. Glucose fuels respiration and leads to biosynthesis of complex organic compounds. Photosynthesis captures energy, while cellular respiration releases energy. This is how animals get all their energy. The reason that you need to breathe is to supply this pathway with oxygen. Microbes respire, including all decomposers Photosynthesis and Respiration are the Key Elements of the Global Carbon Cycle Carbon & Organic Molecules A: Hydrocarbons: Fuels (Non-living) B: Carbohydrates: Sugar, Starch C: Amino Acids: Proteins D: Nucleotides: DNA/RNA Bases (Nucleobase, Sugar, Phosphate) Geological Carbon Cycle Rock Cycle Silicate Weathering Water Calcium silicate mineral Credit: Wikipedia Carbonate-Silicate Cycle
