Nutrient Cycles Nutrient Cycling Unlike energy which flows

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Nutrient Cycles

Nutrient Cycles

Nutrient Cycling • Unlike energy, which flows one -way through an ecosystem, matter is

Nutrient Cycling • Unlike energy, which flows one -way through an ecosystem, matter is recycled through ecosystems – law of conservation of matter ENERGY MATTER

Nutrient Cycling • Matter (elements, chemical compounds) are recycled through biogeochemical cycles – The

Nutrient Cycling • Matter (elements, chemical compounds) are recycled through biogeochemical cycles – The Water Cycle – The Carbon Cycle – The Nitrogen Cycle – The Phosphorus Cycle

Water Cycle

Water Cycle

Carbon Cycle

Carbon Cycle

Main Points: • Carbon (in CO 2 form) cycles between Photosynthesis and Cellular Respiration

Main Points: • Carbon (in CO 2 form) cycles between Photosynthesis and Cellular Respiration • CO 2 is in the atmosphere and in the ocean – Photosynthesis: Atmosphere Organisms – Feeding Producer Organisms Consumers – Respiration Organisms Atmosphere • Decomposition of organisms returns carbon to the soil/water/atmosphere • Human activity increases the amount of carbon in the atmosphere, leading to climate change

Nitrogen Cycle

Nitrogen Cycle

Main Points: • Major N 2 reservoir is in the atmosphere • Bacteria “fix”

Main Points: • Major N 2 reservoir is in the atmosphere • Bacteria “fix” nitrogen and convert it into a usable form (from N 2 gas to ammonia (NH 3) – Nitrates & Ammonia in ground • Producers take up nitrogen from the soil • Nitrogen… – Is used in DNA synthesis – Is a part of amino acids (proteins)

Remember… • Biological systems don't use up matter, they transform it! • Entropy: the

Remember… • Biological systems don't use up matter, they transform it! • Entropy: the world slowly becoming more and more disordered….

Nutrient Cycle Limitations • LIMITING NUTRIENT – When ecosystems lack needed nutrients, it restricts

Nutrient Cycle Limitations • LIMITING NUTRIENT – When ecosystems lack needed nutrients, it restricts growth. – This is often why fertilizer is used!

Over-fertilization • Runoff of nutrients into water sources • More nutrients in water means

Over-fertilization • Runoff of nutrients into water sources • More nutrients in water means that producers (algae) grow and reproduce faster • Not enough consumers to eat excess producers. • Leads to an “algal bloom” --- too many algae use up all the oxygen in the water • No oxygen means everything dies eutrophication

Energy Flow Cycles Element Cycles BIOGEOCHEMICAL CYCLES MatterEnergy Flow Cycles Element Cycles BIOGEOCHEMICAL CYCLES Matter
Cycles of Matter Cycling of Matter Cycles inCycles of Matter Cycling of Matter Cycles in
BIOGEOCHEMICAL CYCLES BIOGEOCHEMICAL CYCLES The cycling of chemicalBIOGEOCHEMICAL CYCLES BIOGEOCHEMICAL CYCLES The cycling of chemical
BIOGEOCHEMICAL CYCLES BIOGEOCHEMICAL CYCLES The cycling of chemicalBIOGEOCHEMICAL CYCLES BIOGEOCHEMICAL CYCLES The cycling of chemical
Chapter 3 Nutrient Cycles MATTER CYCLING IN ECOSYSTEMSChapter 3 Nutrient Cycles MATTER CYCLING IN ECOSYSTEMS
Nutrient Cycles Cycling maintains homeostasis balance in theNutrient Cycles Cycling maintains homeostasis balance in the
Energy Transfer Nutrient Cycling How is energy transferredEnergy Transfer Nutrient Cycling How is energy transferred
Working with unlike fractions Introducing Unlike fractions 3Working with unlike fractions Introducing Unlike fractions 3
Flows and Cycles Large scale flows and stellarFlows and Cycles Large scale flows and stellar
Nutrient cycles Intro and Carbon Cycle Flows ofNutrient cycles Intro and Carbon Cycle Flows of
0 Business Cycles Business Cycles Business cycles are0 Business Cycles Business Cycles Business cycles are
Biogeochemical Cycles Phosphorus Biogeochemical Cycles The great cyclesBiogeochemical Cycles Phosphorus Biogeochemical Cycles The great cycles
0 Business Cycles Business Cycles Business cycles are0 Business Cycles Business Cycles Business cycles are
Cycles Cycles CYCLES CONNECTIONS Water Cycle Nitrogen CycleCycles Cycles CYCLES CONNECTIONS Water Cycle Nitrogen Cycle
NUTRIENT CYCLES GEOCHEMICAL CYCLES Movement of a particularNUTRIENT CYCLES GEOCHEMICAL CYCLES Movement of a particular
Cycles of Life and Death Nutrient Cycles SustainableCycles of Life and Death Nutrient Cycles Sustainable
Biogeochemical Cycles Nutrient Cycles La materia se reciclaBiogeochemical Cycles Nutrient Cycles La materia se recicla
Georgia Tech Biological Oceanography Nutrient Cycles Nutrient limitationGeorgia Tech Biological Oceanography Nutrient Cycles Nutrient limitation
MATTER ENERGY LIFE Energy flow Nutrient cycles WhatMATTER ENERGY LIFE Energy flow Nutrient cycles What
Ecology Ecosystem Characteristics Nutrient Cycling and Energy FlowEcology Ecosystem Characteristics Nutrient Cycling and Energy Flow
Ecosystems Energy and Nutrient Cycling Outline I EcosystemsEcosystems Energy and Nutrient Cycling Outline I Ecosystems
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NZ Cycling Conference 2003 Why a Cycling StrategyNZ Cycling Conference 2003 Why a Cycling Strategy
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NEW ZEALAND CYCLING SYMPOSIUM 2000 Making Cycling ViableNEW ZEALAND CYCLING SYMPOSIUM 2000 Making Cycling Viable
Cycling Scotland Revamping Cycle Guidelines Cycling Scotland RevampingCycling Scotland Revamping Cycle Guidelines Cycling Scotland Revamping
Safe Cycling Safe Cycling Question 1 TRUE ORSafe Cycling Safe Cycling Question 1 TRUE OR
Health and Cycling Professor Bruce Lynn UCL CyclingHealth and Cycling Professor Bruce Lynn UCL Cycling
Breaking barriers Cycling with women Social Cycling ProjectBreaking barriers Cycling with women Social Cycling Project
British Cycling partnership Celebrating cycling in our OlympicBritish Cycling partnership Celebrating cycling in our Olympic
Cycling Etiquette By David Kriegshauser About Me CyclingCycling Etiquette By David Kriegshauser About Me Cycling
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Basic Cycling Skills Cycling Community Initiation Ready toBasic Cycling Skills Cycling Community Initiation Ready to