The Biogeochemical Cycles

Slides:



Advertisements
Similar presentations
Cycles of Matter Organisms are mainly composed of C, H, O & N
Advertisements

Unit 1 Ecosystems Cycles of Matter.
Biogeochemical Cycles Section 22-2 Pages
1. Review- By what two processes is water cycled from land to the atmosphere Sequence- Describe one way in which water from Lake Superior may make one.
Cycles in Matter Chapter 3.4.
Cycles of Matter Unlike the one-way flow of energy,
Ecology PART III.
CHAPTER 3 -part 2- Biogeochemical Cycles
Biogeochemical Cycles
The Biogeochemical Cycles
Section 2, p The cycling of materials  What element is the essential component of proteins, fats, and carbohydrates? Carbon.
Ecosystems Section 3 Ecology 4.3 Notes. Ecosystems Section 3 Objectives Describe each of the biogeochemical cycles.
Cycles of Matter 3-3. Energy and matter move through the biosphere very differently Energy has a 1 way flow Matter can be recycled within & between ecosystems.
Cycles of Matter. Recycling in the Biosphere Energy and matter move through the biosphere very differently. Unlike the one-way flow of energy, matter.
Botkin & Keller Environmental Science 5e Chapter 5 The Biogeochemical Cycles.
Hydrological Carbon Nitrogen Phosphorous Biogeochemical Cycles.
Lesson Overview 3.4 Cycles of Matter.
Biogeochemical Cycles. Closed system The earth is virtually a closed system to everything except energy. Only energy from the sun enters our atmosphere.
III. Cycles of Matter *While energy is crucial to an ecosystem, all organisms need water, minerals, and other life-sustaining compounds to survive. In.
Biogeochemical Cycles
CYCLES OF MATTER NATURAL WORLD. Objectives Describe how matter cycles between the living and nonliving parts of an ecosystem. Explain why nutrients are.
Nutrient Cycles Environmental Science. A Generalized Cycle Materials often move between the regions of the earth- - Atmosphere - Hydrosphere - Lithosphere.
Botkin & Keller Environmental Science 5e Chapter 5 The Biogeochemical Cycles.
Activity #18: Cycles of Matter. EQ How do Earth’s biotic and abiotic factors interact to shape ecosystems and affect the survival of organisms over time?
Producers and Consumers: the Living Components of Ecosystems BASIC ECOSYSTEM STRUCTURE Biotic vs. Abiotic Producers, autotrophs … TROPH = EATING/FEEDING.
Chapter 5: The Chemistry of Life. Biogeochemical Cycles A biogeochemical cycle is the complete path a chemical takes through the four major components.
The Biogeochemical Cycles
Cycles of Matter Matter moves in Biogeochemical cycles through living systems, the Earth, the atmosphere, and the oceans. These cycles connect biological,
Nitrogen and carbon cycle Ruben A. Hernandez Nitrogen  Nitrogen is important for all living organisms and is used for amino acids, DNA, and RNA.  About.
Essential elements describe the ________ of essential elements from the ______________ through living organisms and _______ into the environment. Biogeochemical.
The Biogeochemical Cycles
2. Name two of the four biogeochemical cycles.
Withgott Environmental Science Chapter 3, Lesson 4 Pages
Life depends on recycling chemical elements
Biogeochemical Cycles
Ecology 4.3 Notes.
Biogeochemical (Nutrient) Cycles
Chapter 3 Section 3.4 continued
Biogeochemical Cycles
3-3 Cycles of Matter.
The Biogeochemical Cycles
Environmental Science Do Now
Module 7 The Movement of Matter
Cycles of Matter MATTER CYCLES
Copyright Pearson Prentice Hall
Biogeochemical Cycles
Section 2, p Chapter 5.
Recycling in the Biosphere
Unit 2: Ecology 2.2 Cycles of Matter.
The Biogeochemical Cycles
The Nitrogen and Phosphorus Cycles
Copyright Pearson Prentice Hall
Biogeochemical Cycles
ECOLOGY Part 2 - Chapter 3.4 Cycles.
Ecosystem Recycling.
3-3 Cycles of Matter.
Chapter 3.3 Cycles of matter.
3-3 Cycles of Matter.
The Cycling of Materials
Copyright Pearson Prentice Hall
Biogeochemical Cycles
Biogeochemical Cycles
3-3 Cycles of Matter.
3-3 Cycles of Matter.
Biogeochemical Cycles
Nutrient Cycles.
Biogeochemical Cycles
BIO-GEO-CHEMICAL CYCLES
Chapter 3: The Biosphere
Copyright Pearson Prentice Hall
Presentation transcript:

The Biogeochemical Cycles Chapter 5 The Biogeochemical Cycles Botkin & Keller Environmental Science 5e

Environmental Science 5e The Geologic Cycle The Geologic Cycle: The processes responsible for formation and change of Earth materials Best described as a group of cycles: Tectonic Rock hydrologic Biochemical Botkin & Keller Environmental Science 5e

Environmental Science 5e Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Tectonic Cycle Creation and destruction of the Lithosphere Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e The Rock Cycle The rock cycle: Numerous processes that produce rocks and soils Depends on other cycles: tectonic cycle for energy Hydrologic cycle for water for erosion Rock is classified as Igneous – high heat, volcanic Sedimentary – weathering & erosion Metamorphic – compact, melting Botkin & Keller Environmental Science 5e

Environmental Science 5e How Chemicals Cycle Biogeochemical Cycle The complete path a chemical takes through the four major components – or reservoirs – of Earth’s systems Atmosphere Hydrosphere Lithosphere Biosphere Botkin & Keller Environmental Science 5e

Environmental Science 5e Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Biogeochemical Cycles and Life: Limiting Factors Macronutrients Elements required in large amounts by all life Include the “big six” elements that form the fundamental building blocks of life: carbon oxygen hydrogen phosphorus nitrogen sulfur Micronutrients Elements required either in small amounts by all life or moderate amounts by some forms of life and not all by others Limiting factor When chemical elements are not available at the right times, in the right amounts, and in the right concentrations relative to each other Botkin & Keller Environmental Science 5e

Environmental Science 5e Major Chemical Cycles Water (hydrologic) Carbon Nitrogen Phophorus Botkin & Keller Environmental Science 5e

Environmental Science 5e The Hydrologic Cycle The Hydrologic Cycle: The transfer of water from the oceans to the atmosphere to the land and back to the oceans. POWERED BY THE SUN !! Includes: Evaporation of water from the oceans Precipitation on land Evaporation from land Runoff from streams, rivers, and sub-surface groundwater Transpiration from plants Botkin & Keller Environmental Science 5e

Environmental Science 5e Human Impacts Withdrawal: Removal from society & industry faster than recharged (overdraft) Increased flooding: Removal of wetlands & creating non-pourous tracts Deforestation: Clearing land reduces transpiration, therefore there is a decrease in precipitation. Botkin & Keller Environmental Science 5e

Environmental Science 5e Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e Botkin & Keller Environmental Science 5e

Environmental Science 5e The Carbon Cycle 4th most abundant element in the universe Building block of life Cycles through the geosphere, biosphere, ocean and atmosphere Two types of cycling Geological carbon cycle Biological carbon cycle Botkin & Keller Environmental Science 5e

Geological Carbon Cycle Botkin & Keller Environmental Science 5e

Environmental Science 5e How does this work? CO2 reacts with atmospheric water and minerals to produce calcium carbonate. Calcium carbonate rock (limestone) weathered by water – dissolves and travels to ocean. Forms sedimentary layers in the ocean. Through plate tectonics, sediments subduct and melts. Carbon is released into the atmosphere during volcanic eruption as CO2 Botkin & Keller Environmental Science 5e

Biological Carbon Cycle Botkin & Keller Environmental Science 5e

Environmental Science 5e Idealized diagram showing the carbon cycle in a lake. Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e Botkin & Keller Environmental Science 5e

Environmental Science 5e Carbon Reservoirs Ocean – dissolved, calcium carbonate of marine organisms shells Geosphere – soils, fossil fuels Biosphere –living organisms Atmosphere – 0.038% of troposphere (Acts as natural thermostat for Earth) Botkin & Keller Environmental Science 5e

Environmental Science 5e Human impacts Increases Carbon Dioxide in the atmosphere by: Burning of fossil fuels Clear cutting of trees Botkin & Keller Environmental Science 5e

Environmental Science 5e Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e Botkin & Keller Environmental Science 5e

Environmental Science 5e The Nitrogen Cycle The nitrogen cycle: Limiting factor for primary productivity As nutrient: NO3 Conversion of N2 gas into nutrients – lightning & nitrogen fixing bacteria Nitrogen reservoirs: Atmosphere 78% of Troposphere Botkin & Keller Environmental Science 5e

Common nitrogen compounds N2 - nitrogen gas NH4 - ammonium NH3 - ammonia NO3 - nitrate NO2 - nitrite (with -2 charge), nitrogen dioxide N2O - nitrous oxide, nitrogen oxide NO – nitric oxide, nitrogen monoxide HNO3- nitric acid Botkin & Keller Environmental Science 5e

Steps in the Nitrogen Cycle Nitrogen fixation: N2 converted to NH4 or NH3 by bacteria Ammonification (mineralization) Decomposers turn organic material into NH4 or NH3 Nitrification Bacteria convert NH4 & NH3 into NO3 for plant uptake Denitrification Bacteria convert NH4 & NH3 into N2 & N2O Botkin & Keller Environmental Science 5e

Environmental Science 5e Nitrogen fixation In order to be used by most living organism nitrogen must by in the form of NH3 or NO3. Nitrogen is ‘fixed’ by lightning or bacteria. ‘Fixing’ allows nitrogen to be made biologically available. Can be found on the roots of legumes. Botkin & Keller Environmental Science 5e

Environmental Science 5e Nitrification Soil bacteria convert ammonia (NH4) into a form that plants can use NO3 Botkin & Keller Environmental Science 5e

Environmental Science 5e Assimilation Plants absorb ammonium (NH3), ammonia (NH4) and nitrate (NO3) through their roots. Heterotrophs (or organisms that receive energy from consuming other organisms) obtain nitrogen from consuming plant proteins or other animals. Botkin & Keller Environmental Science 5e

Environmental Science 5e Ammonification Decomposing bacteria convert dead organisms and other waste to ammonia (NH3) or ammonium (NH4), which can be reused by plants Botkin & Keller Environmental Science 5e

Environmental Science 5e Denitrification Specialized bacteria (anaerobic) convert ammonia back to nitrates and nitrites THEN back into nitrogen gas and nitrous oxide, where they enter the atmosphere. Botkin & Keller Environmental Science 5e

Environmental Science 5e Nitrogen Cycle Botkin & Keller Environmental Science 5e

Environmental Science 5e Botkin & Keller Environmental Science 5e

Environmental Science 5e Additional Info Assimilation: Plants take up inorganic nitrogen (NH3 & NO3) and convert to organic compounds (amino acids) Botkin & Keller Environmental Science 5e

Environmental Science 5e Human Impacts Excess Nitrates Animal waste, municipal discharge Can promote algae growth Burning of Fossil Fuels Released NO, NO2 and HNO3 Use of inorganic fertilizers Increases denitrification by anaerobic bacteria, and therefore releases more NO2 into the atmosphere. Botkin & Keller Environmental Science 5e

Environmental Science 5e Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e The Phosphorus Cycle The phosphorus cycle: Involves the movement of phosphorus throughout the biosphere, hydrosphere and lithosphere Important because phosphorus is an essential element for life and often is a limiting nutrient for plant growth. Botkin & Keller Environmental Science 5e

Phosphorus Reservoirs Ocean sediments Terrestrial rock layers Erosion releases PO4 for producers Limiting factor for primary productivity Botkin & Keller Environmental Science 5e

Environmental Science 5e Guano Island The Guano Islands Act (11 Stat. 119, enacted 18 August 1856, codified at 48 U.S.C. ch. 8 §§ 1411-1419) is United States federal law passed by the U.S. Congress that enables citizens of the United States to take possession of unclaimed islandscontaining guano deposits. Botkin & Keller Environmental Science 5e

Environmental Science 5e Human Impacts Phosphate run-off from Sewage, mining & fertilizers Algal blooms Botkin & Keller Environmental Science 5e

Environmental Science 5e Idealized diagram showing the carbon cycle in a lake. Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e Botkin & Keller Environmental Science 5e © 2008 John Wiley and Sons Publishers

Environmental Science 5e Botkin & Keller Environmental Science 5e