Podcast
Questions and Answers
What is the primary source of carbon in the atmosphere?
What is the primary source of carbon in the atmosphere?
- Human activities (correct)
- Dissolution in ocean waters
- Photosynthesis
- Sedimentation
During which period did coal consumption dramatically increase?
During which period did coal consumption dramatically increase?
- The Renaissance
- The Industrial Revolution (correct)
- The Age of Exploration
- The Enlightenment
What process contributes to the formation of carbonate ions in the ocean?
What process contributes to the formation of carbonate ions in the ocean?
- Transpiration
- Respiration
- Outgassing (correct)
- Photosynthesis
What is the total amount of carbon released by human activities since the Industrial Revolution?
What is the total amount of carbon released by human activities since the Industrial Revolution?
Which of the following is the most significant reservoir of carbon in the world?
Which of the following is the most significant reservoir of carbon in the world?
What role does photosynthesis play in the carbon cycle?
What role does photosynthesis play in the carbon cycle?
Which carbon flux is directly influenced by human activities?
Which carbon flux is directly influenced by human activities?
What is the amount of carbon found in marine biomass?
What is the amount of carbon found in marine biomass?
What does the sampling effect refer to in diverse ecosystems?
What does the sampling effect refer to in diverse ecosystems?
How does complementarity enhance ecosystem productivity?
How does complementarity enhance ecosystem productivity?
What impact does biodiversity loss have on ecosystem functions?
What impact does biodiversity loss have on ecosystem functions?
Which statement is true about the impact of biodiversity on ecosystem functions?
Which statement is true about the impact of biodiversity on ecosystem functions?
What does the insurance mechanism refer to in terms of biodiversity?
What does the insurance mechanism refer to in terms of biodiversity?
What key role does phosphorus play in living organisms?
What key role does phosphorus play in living organisms?
Which statement about carbon in living organisms is true?
Which statement about carbon in living organisms is true?
What process converts inorganic carbon into organic forms?
What process converts inorganic carbon into organic forms?
How is carbon primarily used by living organisms?
How is carbon primarily used by living organisms?
What are the two main forms of carbon found in the atmosphere?
What are the two main forms of carbon found in the atmosphere?
Which of the following processes contributes to the fluxes of carbon in ecosystems?
Which of the following processes contributes to the fluxes of carbon in ecosystems?
What is the significance of carbonate ions (CO32−) in aquatic systems?
What is the significance of carbonate ions (CO32−) in aquatic systems?
What happens to carbon after it is incorporated into organic molecules through photosynthesis?
What happens to carbon after it is incorporated into organic molecules through photosynthesis?
What is the primary source of carbon emissions from fossil fuels?
What is the primary source of carbon emissions from fossil fuels?
How does biodiversity loss potentially affect ecosystem functions?
How does biodiversity loss potentially affect ecosystem functions?
What type of resource are fossil fuels classified as?
What type of resource are fossil fuels classified as?
What is the relationship between biodiversity and ecosystem function described as potentially being?
What is the relationship between biodiversity and ecosystem function described as potentially being?
What did the experimental approaches at Cedar Creek focus on?
What did the experimental approaches at Cedar Creek focus on?
What happens to CO2 levels due to the burning of fossil fuels?
What happens to CO2 levels due to the burning of fossil fuels?
What is the statement regarding the flux rate of carbon from land and ocean to the atmosphere?
What is the statement regarding the flux rate of carbon from land and ocean to the atmosphere?
What ecological processes are controlled by ecosystem function?
What ecological processes are controlled by ecosystem function?
Flashcards
Carbon's role in life
Carbon's role in life
Carbon is a fundamental element in all living things, forming the building blocks of macromolecules.
Carbon fixation
Carbon fixation
The process by which primary producers (plants) convert atmospheric carbon dioxide into organic compounds via photosynthesis.
Organic Carbon Oxidation
Organic Carbon Oxidation
The process of breaking down organic carbon compounds (like glucose) to release energy for cellular activities.
Carbon Cycle
Carbon Cycle
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CO2 and CH4
CO2 and CH4
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Phosphorus's role
Phosphorus's role
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Carbon Compounds in Living Things
Carbon Compounds in Living Things
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Carbon Cycle Processes
Carbon Cycle Processes
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Carbon Reservoir - Ocean
Carbon Reservoir - Ocean
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Carbon Flux - Atmosphere
Carbon Flux - Atmosphere
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Carbon Flux - Fossil Fuels
Carbon Flux - Fossil Fuels
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Carbon Flux - Photosynthesis
Carbon Flux - Photosynthesis
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Carbon Flux - Respiration
Carbon Flux - Respiration
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Industrial Revolution & CO2 Emissions
Industrial Revolution & CO2 Emissions
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Carbonate Ion Formation
Carbonate Ion Formation
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Carbonate Precipitation
Carbonate Precipitation
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Fossil Fuels & Carbon
Fossil Fuels & Carbon
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Pre-Industrial Carbon
Pre-Industrial Carbon
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Fossil Fuel Emissions
Fossil Fuel Emissions
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Non-Renewable Resource
Non-Renewable Resource
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Ecosystem Function
Ecosystem Function
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Ecosystem Services
Ecosystem Services
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Biodiversity Impacts?
Biodiversity Impacts?
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Biodiversity-Function Relationships
Biodiversity-Function Relationships
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Sampling Effect
Sampling Effect
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Complementarity
Complementarity
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Insurance Effect
Insurance Effect
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Biodiversity's Impact on Ecosystem Function
Biodiversity's Impact on Ecosystem Function
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Biodiversity & Productivity
Biodiversity & Productivity
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Study Notes
Ecosystem Ecology II: The Global Carbon Cycle
- The global carbon cycle involves a continuous exchange of carbon between various reservoirs (atmosphere, oceans, land, living organisms, and fossil fuels).
- The atmosphere is a major reservoir of carbon dioxide (CO2), and methane (CH4).
- Oceans and fresh water also contain dissolved carbon dioxide and carbonate ions.
- Aquatic systems also contain carbonate ions.
Ecology in the News
- Warming temperatures are melting permafrost, releasing CO2 and methane.
- Scientists have revived ancient viruses from permafrost, highlighting potential dangers from thawing permafrost.
- The thawing of permafrost due to climate change may pose a new threat to humans.
- Researchers revived, and characterized, 13 new pathogens (zombie viruses) from Siberia that remained infectious despite spending many millennia.
Phosphorus: Key Element in Constructing Lipid Membranes and Fueling Cells
- Phosphorus is crucial for constructing lipid membranes and fueling cellular functions.
- The phosphorus cycle involves various processes such as geologic uplift, weathering, runoff, decomposition, plant uptake, leaching, and consumption.
- Phosphorus moves through the environment in various forms, including dissolved phosphate ions.
Carbon: The Cool Kid of the Elements
- Carbon is a fundamental element in all living organisms.
- It has various allotropes (forms), including graphite, diamond, BC8, fullerenes, nanotubes, and graphene.
- Carbon exists in many forms, in living organisms, and in the atmosphere as CO2.
- Carbon forms the basis of all organic molecules.
Global Carbon Cycle
- Carbon is fixed from the atmosphere by primary producers through photosynthesis.
- The formula for photosynthesis is: 6CO2 + 6H2O → C6H12O6 + 6O2 (carbon dioxide + water → glucose + oxygen).
- Much of the energy organisms use to fuel metabolic activities comes from the oxidation of organic carbon compounds (e.g. glucose).
- The formula for oxidation of glucose is: C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP, (glucose + oxygen → carbon dioxide + water + energy).
- The global carbon cycle includes biological, chemical, and physical processes.
- Carbon in the atmosphere is largely in the form of CO2 and CH4.
Industrial Revolution
- The industrial revolution (1760-1820) involved significant increases in coal consumption.
- This period of time released 1.6 trillion tons of Carbon into the atmosphere.
Learning Catalytics
- One possible cause of increased atmospheric CO2 over the years is fossil fuel burning.
Biodiversity and Ecosystem Function
- Ecosystem function involves ecological processes that regulate energy, nutrient, and organic matter fluxes.
- Biodiversity and ecosystem functions are related in complex ways.
Experimental Approaches
- Biodiversity experiments at Cedar Creek have investigated the relationship between biodiversity and ecosystem function.
- Biodiversity experiments show a correlation between biodiversity and drought resistance in grasslands.
Potential Mechanisms
- Mechanisms influencing the biodiversity-ecosystem function relationship include sampling effect, complementarity, and insurance.
- Sampling effect (species selection) occurs when diverse systems tend to include highly productive species.
- Complementarity or niche partitioning involves positive interactions amongst species.
- Insurance occurs when some species maintain function even when others fail.
Overall Conclusions
- Loss of biodiversity decreases the efficiency of resource use, biomass production, and decomposition.
- Biodiversity increase enhances the stability of ecosystem functions.
- The relationship between biodiversity and ecosystem functions is typically linear or saturating, where diverse communities tend to be more productive because of high productivity species and differences in functional traits.
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