Ppt on nitrogen cycle and nitrogen fixation definition

ECOLOGY. THE BIOSPHERE: all life on Earth and all the parts of the Earth where life exists Ecology is the study of the interactions of all of the organisms.

, and in dead and decaying organic matter. Dissolved nitrogen: Exists in several forms in the ocean and other large water bodies BACTERIA Although nitrogen gas is the most abundant form of nitrogen on Earth, only a handful of organisms – certain types of bacteria – can use this form directly. Because they “lock” (=fix) the nitrogen into usable forms, these nitrogen-fixing bacteria are an essential part of the nitrogen cycle. NITROGEN FIXATION In/


Wang College of Sciences, FAFU NUTRIENT CYCLING IN SOIL By Wang Songliang,adapted from Dr Miller’s lecture 2005-3-22 THE SOIL CARBON CYCLE NUTRIENT CYCLING.

. Wang College of Sciences, FAFU NUTRIENT CYCLING IN SOIL Slide # 11: Amoeba 变 形虫 Amoebas are microscopic single-celled soil organisms which lack a definite shape. Wang College of Sciences, FAFU NUTRIENT CYCLING IN SOIL Slide # 12: Amoeba attacking/material and livestock manure, and by taking advantage of natural inputs. Wang College of Sciences, FAFU NUTRIENT CYCLING IN SOIL N Fixation: Use of legumes in crop rotations increases the nitrogen fixation input Wang College of Sciences, FAFU NUTRIENT CYCLING IN/


The mixture various gases like o2,co2,watervap- Our,nitrogen, etc is called air. It comprises of atmosphere- The multilayered gaseous envelope surrounding.

the living organism in the form of protein, amino acids and nucleic acids. Further process going on in this cycle they are- First nitrogen has to be converted into nitrates for the use of plants. This can be done either by industrial nitrogen fixation like by some nitrogen fixation bacteria such as azotobactor which convert the atmospheric nitrogen into nitrates which are soluble in water this process is/


This lecture will help you understand:

be taken up by plants or soils of northern temperate and boreal forests The nitrogen cycle involves specialized bacteria Nitrogen comprises 78% of our atmosphere It is contained in proteins, DNA, and RNA Nitrogen cycle = describes the routes that nitrogen atoms take through the environment Nitrogen gas cannot be used by most organisms Nitrogen fixation = lightning or nitrogen-fixing bacteria combine (fix) nitrogen with hydrogen to form ammonium, which can be used by/


VADOSE ZONE INTERACTION WITH HYPORHEIC ZONE NITROGEN CYCLING Doug Higbee BAE 558 – Fluid Mechanics of Porous Materials May 8, 2009.

of the hyporheic zone ◦Watershed hydrology and the hyporheic zone ◦Nitrogen cycling in the hyporheic zone Nitrogen Cycle Benefits of Nitrogen ◦Essential element for all plants and animals ◦Creation of proteins ◦Amino acids (DNA & RNA) ◦Plant respiration ◦All nitrogen obtained by animals can be traced back to the eating of plants at some stage of the food chain. Nitrogen Cycle Nitrogen Fixation ◦Necessary to free up nitrogen from gas form for use by/


Slide 1 CHAPTER 4: ECOSYSTEMS: COMPONENTS, ENERGY FLOW AND MATTER CYCLING Also some carry over from chapter 3 is in this chapter.

Slide 12 MUST KNOW DEFINITIONS FROM INDIVIDUAL UP Organism Species is group of organisms that interbreeds and produces fertile offspring. /and types of services provided by natural capital – for example water purification Productivity Slide 26 Biosphere Carbon cycle Phosphorus cycle Nitrogen cycle Water cycle Oxygen cycle/ ) loss by leaching uptake by autotrophs excretion, death, decomposition uptake by autotrophs Nitrogen Fixation bacteria convert to ammonia (NH 3 + ) ; this dissolves to form ammonium/


Microbes and biotechnology Option F.1. Assessment statements F.1.1 Outline the classification of living organisms into three domains. F.1.2 Explain the.

bacteria use chemical energy Nitrogen fixers Bacteria remove nitrogen gas from the atmosphere and fix it into nitrates which are useable by producers Decomposers Breakdown detritus and release inorganic nutrients back into the ecosystems The nitrogen cycle Mutualistic nitrogen fixation: bacteria forms symbiotic relationship with a host plant and fix nitrogen for it (Ex.Rhizobium) Free-living nitrogen fixation: live in soil (Ex. Azotobacter) Industrial nitrogen fixation: burning of fossil fuels/


Ecosystems and Human Interferences Chapter 48. Outline Biotic Components Biotic Components Autotrophs Autotrophs Heterotrophs Heterotrophs Energy Flow.

. Nitrification - Production of nitrates. Denitrification - Conversion of nitrate to nitrous oxide and nitrogen gas. Denitrification - Conversion of nitrate to nitrous oxide and nitrogen gas. Balances nitrogen fixation. Balances nitrogen fixation. The Nitrogen Cycle Nitrogen and Air Pollution Acid Deposition Acid Deposition Nitrogen oxides and sulfur dioxide are converted to acids when they combine with water vapor. Nitrogen oxides and sulfur dioxide are converted to acids when they combine with water vapor/


© 2014 Pearson Education, Inc. Lecture Outlines Chapter 5 Environmental Systems and Ecosystem Ecology Withgott/Laposata Fifth Edition.

up by plants or soils of northern temperate and boreal forests © 2014 Pearson Education, Inc. The nitrogen cycle involves specialized bacteria  Nitrogen comprises 78% of our atmosphere  It is contained in proteins, DNA, and RNA  Nitrogen cycle  describes the routes that nitrogen atoms take through the environment  Nitrogen gas cannot be used by most organisms  Nitrogen fixation  lightning or nitrogen-fixing bacteria combine (fix) nitrogen with hydrogen to form ammonium, which can be/


I. Energy Flow A. Producers / Make their own food through photosynthesis using sun, water, and carbon dioxide / Plants, algae A. Producers / Make their.

. III. Food Web A. Definition: pattern of feeding represented by interconnected branching food chains- more realistic representation of feeding relationships. A. Definition: pattern of feeding represented by /and CO 2 is release into air The Carbon Cycle C. NITROGEN CYCLE / Nitrogen found in amino acids, make proteins proteins / 80% of it is in atmosphere / Nitrogen Fixation- certain bacteria “ fix ” nitrogen gas into ammonium “ fix ” nitrogen gas into ammonium / Found near peas, beans, alfalfa / Nitrogen/


Microbes and biotechnology Option F.1. Assessment statements F.1.1 Outline the classification of living organisms into three domains. F.1.2 Explain the.

bacteria use chemical energy Nitrogen fixers Bacteria remove nitrogen gas from the atmosphere and fix it into nitrates which are useable by producers Decomposers Breakdown detritus and release inorganic nutrients back into the ecosystems The nitrogen cycle Mutualistic nitrogen fixation: bacteria forms symbiotic relationship with a host plant and fix nitrogen for it (Ex.Rhizobium) Free-living nitrogen fixation: live in soil (Ex. Azotobacter) Industrial nitrogen fixation: burning of fossil fuels/


© 2014 Pearson Education, Inc. Lecture Outlines Chapter 5 Environmental Systems and Ecosystem Ecology Withgott/Laposata Fifth Edition.

plants or other animals, releasing ammonium ions to nitrifying bacteria © 2014 Pearson Education, Inc. Nitrification and denitrification  Denitrifying bacteria  bacteria that convert nitrates in soil or water to gaseous nitrogen, releasing it back into the atmosphere and completing the nitrogen cycle © 2014 Pearson Education, Inc. We have greatly influenced the nitrogen cycleNitrogen fixation was a crop production bottleneck  the limiting factor in crop production  Haber-Bosch process  production/


Stream Nutrient Processing: Spiraling, Removal and Lotic Eutrophication Ecohydrology Fall 2015.

/carosella/Biol4050W03/figures/phosphorus_cycle.htm Nitrogen Cycle Includes major atmospheric pool - N 2. – N fixers use atmospheric supply directly (prokaryotes). Energy-demanding process; reduces to N 2 to ammonia (NH 3 ). – Industrial N 2 - fixation for fertilizers exceeds biological N fixation annually. (We do it with Haber-Bosch) – Denitrifying bacteria release N 2 in anaerobic respiration (they “breathe” nitrate). – Decomposer and consumers release waste N/


Introduction Principles that govern the Reactions, Transport, Effects and Fate of chemical Species in air, water, soil, and Living Environment. Atmospheric.

Nitrogen cycle The main component of the nitrogen cycle starts with the element nitrogen in the air. Two nitrogen oxides are found in the air as a result of interactions with oxygen. Nitrogen will only react with oxygen in the presence of high temperatures and pressures found near lightning bolts and/ Biological Fixation About 90% of nitrogen fixation is done by bacteria. Cyanobacteria convert nitrogen into ammonia and ammonium.N 2 + 3 H 2 → 2 NH 3 Ammonia can be used by plants directly. Ammonia and ammonium/


Marine Bioinorganic Chemistry (Trace Metal Biogeochemistry) 12.741 MIT-WHOI Joint Program Graduate Course - Lecture 1 Mak Saito, Marine Chemistry and Geochemistry.

semester Inorganic components are (also) required by life Marine and Environmental Bioinorganic Chemistry Trace Metal Biogeochemistry Bioinorganic Chemistry Metals in / due to nitrogen fixation Four Categories of Trace Metal Profiles in 2D 2.Nutrient-type distributions: –Significantly involved with internal cycles of biologically derived/, since there appear to be non- biological elements with nutrient-like profiles Definitions Ligand – an atom, ion, or molecule that donates/shares electrons with one/


© 2014 Pearson Education, Inc. Lecture Outlines Chapter 5 Environmental Systems and Ecosystem Ecology Withgott/Laposata Fifth Edition.

up by plants or soils of northern temperate and boreal forests © 2014 Pearson Education, Inc. The nitrogen cycle involves specialized bacteria  Nitrogen comprises 78% of our atmosphere  It is contained in proteins, DNA, and RNA  Nitrogen cycle  describes the routes that nitrogen atoms take through the environment  Nitrogen gas cannot be used by most organisms  Nitrogen fixation  lightning or nitrogen-fixing bacteria combine (fix) nitrogen with hydrogen to form ammonium, which can be/


2.5 Function Mrs. Page ESS 2014-2015.

to perform a specific function. Systems often have inputs and outputs. For dynamic systems, by definition, one or more aspects of the system change with /cycle: CO2 to organic compounds (process: photosynthesis) Nitrogen cycle: N2 to NO3 (atmospheric nitrogen to plant utilizable nitrate) (process: N-fixation) Nitrogen cycle: N2 to NH3 (plant utilizable ammonia) (process: Haber-Bosch Industrial N-fixation) Water cycle: Liquid water to water vapor (process: evaporation and evapo-transpiration) Water cycle/


Microbial Metabolism A.Basic Concepts of Metabolism B.Glycolytic Pathways C.Fermentation D.Respiration E.Photosynthesis F.Chemolithotrophy G.The Nitrogen.

NO 3 -  N 2 O N 2 O  N 2 (Several species, including certain Pseudomonas and Bacillus ) G.The Nitrogen Cycle 4. Assimilatory Nitrate Reduction NO 3 2-  Organic Nitrogen (Many microbial species and plants) 5.N 2 fixation N 2  NH 4 + Free-living nitrogen fixers eg Azotobacter and Azospirillum Symbiotic nitrogen fizers eg Rhizobium and Bradyrhizobium Cyanobacteria attached to the cordgrass plant Spartina in salt marshes G.The/


Section 1.1 p.182-190.  Everything contains chemicals: environment and living things  Oxygen: animals need oxygen in order to survive. Plants make oxygen.

need carbon dioxide to survive. Animals make carbon dioxide.  Forest fires and volcanoes- release carbon dioxide (too much?)  Gasoline, electricity and pesticides- produce toxins that affect our environment (how?)  Nitrogen cycle: what do you think it might mean?  Nitrogen cycle is a cycle that involves the use and deposition of nitrogen in the earth. Like recycling.  Nitrogen fixation- process in which nitrogen is “fixed” so it can be used  Fixed = combine with/


Ecology Relationship of organisms with each other and their environment.

--> Tertiary Consumer D. Decomposers are found at EACH trophic level. III. Food Web A. Definition: pattern of feeding relationships. A. Definition: pattern of feeding relationships. B. Draw a simple food web IV. Three Kinds of Ecological/and CO 2 is release into air / BURN FOSSIL FUELS RELEASE CO2 C. NITROGEN CYCLE / Nitrogen found in amino acids, which make proteins & DNA / 80% of it is in atmosphere ( N 2 ) / Nitrogen Fixation- certain bacteria “ fix ” nitrogen gas N 2 into ammonium “ fix ” nitrogen/


Lectures 3 -6: Climate and Agriculture Prof Shellemiah O keya 6 th June 2013.

and P to become in short supply; however, CO 2 increase would stimulate mycorrhizal activity (making soil phosphorus more easily available), and also biological nitrogen fixation/definitely affect agriculture. Global climate change, if it occurs, will definitely affect agriculture. Most mechanisms, and two-way interactions between agriculture and climate, are known, even if not always well understood. Most mechanisms, and two-way interactions between agriculture and/ affect the carbon cycle (with a missing/


Ecology SCI.9-12.B-6 - [Standard] - The student will demonstrate an understanding of the interrelationships among organisms and the biotic and abiotic.

All of these processes are done by bacteria. Terms for Nitrogen Cycle Ammonification Nitrification Denitrification Nitrogen Fixation by bacteria PHOSPHORUS CYCLE Weathering wears away rocks and sediments and releases phosphate into soil and water Image from: Pearson Education Inc; Publishing as Pearson Prentice Hall Producers absorb phosphate from soil and water Phosphate moves through food web Phosphate returns to soil and water from waste or decomposition Sediments form “new land/


Ecology is the study of the interactions between living things and between organisms and their environment. Their environment refers to all the conditions.

where an organism or group of organisms live. More Definitions Population: all the members of the same species living in an area e.g./and animals. Nitrogen gas must first be ‘fixed’, i.e. changed to a suitable form (ammonia or nitrate) before it can be used. The Nitrogen Cycle During the nitrogen cycle the following processes occur: A – nitrogen fixation B – assimilation C – decomposition D – nitrification E – denitrification The Nitrogen Cycle A. Nitrogen Fixation: is the conversion of nitrogen/


Bio 20:Unit 1A Chapters 1 and 2 Nelson Pages 6-16.

NO 2 1- Can attach to hemoglobin of blood, thus, less O 2 in body Assignment :  Complete the N-cycle worksheet (workbook)  Label and color N-cycle and P-Cycle coloring book diagram  Section 3.3 Questions page 66 Text 96 Review N and C Cycles Review nitrogen cycle http://bcs.whfreeman.com/thelifewire/content/chp58/5802004.html http://www.nslc.wustl.edu/courses/Bio381/movies/processes/C&Ncycles/


Unit 2A- Ecology. The Biosphere: all life on Earth and all the parts of the Earth where life exists Ecology is the study of the interactions of all of.

decomposing plants and animals (Ex: fungi and bacteria) Detritivores- feed on detritus particles (Ex: earthworms) * Put these definitions in the correct bubbles on pg. 5 in the notes. Types of Consumers Food Chains and Food Webs / (=fix) the nitrogen into usable forms The usable forms can then be used by other organisms Thus, nitrogen-fixing bacteria are an essential part of the nitrogen cycle. Nitrogen Fixation : The conversion of Nitrogen Gas (not usable) into Ammonia, Nitrates, and Nitrites (usable) /


© 2014 Pearson Education, Inc. Lecture Outlines Chapter 5 Environmental Systems and Ecosystem Ecology Withgott/Laposata Fifth Edition.

plants or other animals, releasing ammonium ions to nitrifying bacteria © 2014 Pearson Education, Inc. Nitrification and denitrification  Denitrifying bacteria  bacteria that convert nitrates in soil or water to gaseous nitrogen, releasing it back into the atmosphere and completing the nitrogen cycle © 2014 Pearson Education, Inc. We have greatly influenced the nitrogen cycleNitrogen fixation was a crop production bottleneck  the limiting factor in crop production  Haber-Bosch process  production/


Chapter 16: Ecosystems Ecology: study of interactions among organisms & and their environment Term first coined in 1866 by Ernst Haeckel to describe how.

3: List some abiotic factors. Thinking Question #4: Based on the definition for abiotic factors define biotic factors. Biotic and Abiotic Factors Levels of Organization Cont: 5. Biomes: ecosystems that cover /Cycle Nitrogen Cycle All organisms require nitrogen to make amino acids which are the building blocks of proteins PROBLEM: Nitrogen gas (N 2 ) makes up 78% of earth’s atmosphere, but most plants and animals cannot use this form of nitrogen. Nitrogen Fixation Nitrogen Fixation: bacteria convert nitrogen/


Chapter 22 PROKARYOTES: BACTERIA AND ARCHAEA 22.1 Prokaryotic Diversity 22.2 Structure of Prokaryotes 22.3 Prokaryotic metabolism 22.4 Bacterial Diseases.

interactive communities (recall the definition of a community) The protective exopolysaccharidic environment will exclude antibiotics and disinfectants…so sterilization is/NITROGEN CYCLE (credit: Environmental Protection Agency) Big part of proteins & nucleic acids, recycled to ammonia, ammonium ions, nitrate, nitrite and nitrogen gas. Greatest available source is atmosphere, but plants cannot capture this, but can be transformed to ammonia, soil becomes nitrified by bacteria. So biological nitrogen fixation/


Chemistry of Water. INTRODUCTION B odies of water, both fresh and salt, are actually giant chemical solutions, containing dissolved salts, metals, nutrients,

nitrogen fixation, then changed into nitrates(NO3) in the process of nitrification. This usually occurs in high oxygen content areas such as in the surface layers of the ocean. NO3 is found in the surface waters and are used by phytoplankton. The nitrogen is passed along the food chain and when the organisms die, the nitrogen/ that the NO3 is returned to the form of N2 which cycles the nitrogen gas back into the atmosphere. Nitrogen Cycle Click here for simulation Click here for simulation Click here for /


Chapter 5 SOIL AND FERTILIZER N. Definitions Organic-N:N that is bound in organic material in the form of amino acids and proteins. Mineral-N:N that is.

AND FERTILIZER N Definitions Organic-N:N that is bound in organic material in the form of amino acids and proteins. Mineral-N:N that is not bound in organic material, examples are ammonium and/thunderstorms. “Fixation” used to identify the transformation of N 2 to plant available-N, and lightening / the interrelationship of these processes in the cycle, it is another matter (difficult) to/ 2 lb N required per bushel of wheat yield. Nitrogen Use Efficiency: measure of the percentage of fertilizer applied /


Ecology Unit. Definition of Ecology Ecology- the scientific study of interactions between organisms and their environments.

- Key processes Evaporation, condensation, precipitation Other processes Transpiration Biogeochemical Cycles Carbon cycle- Key processes Photosynthesis and respiration Other processes Combustion of fuels Biogeochemical Cycles Nitrogen cycle- Key processes Nitrogen fixation, plants growing, animals growing, decomposing, and denitrification. Other processes Plant and animal waste and the rock cycle. Nitrogen fixation- convert atmospheric nitrogen (N2) into ammonium (NH4+) which can be used to make organic/


Happy Tuesday! Bellwork: Pick you answer and write 4 key words from the BOX. Surtsey is an island located south of Iceland. The island was formed by a.

major component of plant fertilizers. Some bacteria convert nitrogen gas into ammonia in a process known as nitrogen fixation. Producers use nitrates and nitrites to make proteins. Nitrogen Cycle Recap: Fertilizers Animal wastes Decomposition Removes Nitrogen from soil: Nitrogen- fixing bacteria (on plant roots and in soil) Plants take in and animals ingest the plants Changes the form of Nitrogen: Nitrification Denitrification Adds Nitrogen to soil: When plants absorb phosphate from the/


Ecosystems and the Physical Environment Chapter 5.

El Niño Increases during La Niña Weather and Climate Examine the definitions for climate and weather. What is wrong with the following statement? “Global warming cannot be occurring,/ Cycling of Materials within Ecosystems Basics of biogeochemical cycling Cycling of Materials within Ecosystems Hydrologic (water) cycle: Cycling of Materials within Ecosystems Carbon cycle: Cycling of Materials within Ecosystems Nitrogen cycle: Atmospheric nitrogen (N 2 ) Nitrogen fixation by humans Biological nitrogen fixation /


The Seed- God’s wonder and tiny mystery YOSHINOBU NAMIHIRA MD,FACG 3000 HALLS FERRY ROAD VICKSBURG, MS 39180 PH 601-638-9800,FAX 601-638-9808 E MAIL: NAMIHIRA.

some definitions, the appearance of the radicle marks the end of germination and the /and insecticide rotenone is obtained from roots of Lonchocarpus spp. Important medicines from roots are ginseng, aconite, ipecac, gentian and reserpine. Several legumes that have nitrogen-fixing root nodules are used as green manure crops, which provide nitrogen/Cycle, and formerly known as the Dark Reactions) use the high-energy molecules to capture and chemically reduce carbon dioxide (CO 2 ) (also called carbon fixation/


Describe How Humans Use And Are Affected By Micro-Organisms A.S.90168 2 credits.

headings 1. Word 2. Definition correct 3. Revision Flash /and injecting its DNA Viruses Enter Living Cells Simplified virus reproduction Virus Reproduction reprogram The test on microbes will be next Wed Virus life cycle/fixation Nitrogen fixation (biological) Nitrogen fixation (industry) decay Nitrification Denitrification Activity Turn to page 181 in Blue NCEA Level 1 Bio book Under the heading Antibiotics write notes to explain what antibiotics are What microbes aren’t antibiotics effective against? and/


Ecology is The study of the distribution and abundance of organisms, AND the flows of energy and materials between abiotic and biotic components of ecosystems.

elephants and humans too Food Chains and Food Webs Food Webs Global Cycles Ecosystem Ecology Definition: All the organisms living in a community AND the /nitrogen through a process called denitrification and returned to the atmosphere, continuing the cycle Both atmospheric and soil phases. Plants can’t use Nitrogen out of the air. It must be in mineral form. Ammonium ions (NH4-) Nitrate ions (NO3-) Many bacteria and cyanobacteria convert N 2 to ammonia (NH 3 ). This process is called Nitrogen Fixation/


Life History Characteristics and Population Growth in Marine Ecosystems 1 source A. Sharov Population Ecology web course.

fixation 140 denitrification 1200 internal cycling 8000 internal cycling 10 burial 36 river flow <3 fixation in lightening groundwater Example: The Nitrogen Cycle IV. Logistic growth Biologists beginning with Thomas Malthus & Charles Darwin understood that populations cannot grow exponentially for very long Increasing population size gives rise to … … shortages in food and/Juvenile Fertilisation Development Metamorphosis Growth & Maturation Life Cycle Definitions: Life Tables Cohort is a group of individuals/


Chapter 3 Ecosystem Ecology Read the chapter Read the chapter Part 1 down to biogeochemcial cycles Part 1 down to biogeochemcial cycles Part 2 the rest.

Law of Thermodynamics – what happens to the energy lost with each transfer? Ecological Efficiency  Definition  Tropic levels  Plants/producers 100%  Primary consumers:  Secondary consumers:  /nitrogen from eating plants. Nitrogen Cycle N 2 Decomposers Bacteria 1.Nitrogen Fixation 2.Assimilation 3.Ammonification 4. Nitrification 5. Leaching 6. Denitrification Define each process and use arrows to show the cycle. Human Impact on Nitrogen Cycle  Problem is excess nitrogen – alters the abundance and/


ResourcesChapter menu Copyright © by Holt, Rinehart and Winston. All rights reserved. How to Use This Presentation To View the presentation as a slideshow.

the nitrogen cycle. The Nitrogen Cycle ResourcesChapter menu Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 The Cycles of Matter Chapter 19 Converting Nitrogen Gas Although about 78% of the Earth’s atmosphere is nitrogen gas. Most organisms cannot use nitrogen gas directly. Bacteria in the soil are able to change nitrogen gas into forms that plants can use. This process is called nitrogen fixation. Other organisms get the nitrogen/


Where have we been 1.Course Introduction 2.What is the environment 3.Examined in some detail weather disasters for 2010 and 2011 4.Touched on Scale 5.Touched.

: respiration, decomposition, or fire) 2.Carbon cycle: CO 2 to organic compounds (process: photosynthesis) 3.Nitrogen cycle: N 2 to NO 3 (atmospheric nitrogen to plant utilizable nitrate) (process: N-fixation) 4.Nitrogen cycle: N 2 to NH 3 (plant utilizable ammonia) (process: Haber-Bosch Industrial N-fixation) 5.Water cycle: Liquid water to water vapor (process: evaporation and evapo-transpiration) 6.Water cycle: Water vapor to liquid water (process: condensation/


Raymond L. Lindeman (1915-1942) Energy and nutrient cycles Lindeman’s theory of energetic ecologic was th main trigger to initiate the international biological.

Soil carbon 2,300 Plant and fungal biomass 600 Photosynthesis 123 Plant respiration 50 Microbial respiration 60 Human emissions 7.7 Land use 1.5 Deposition 13 Average Annual Carbon Fluxes for the period 2000-2008 (Modified from LeQuéré et al., 2009) Th annual increase of athmospheric carbon from fossil fuel burning The Nitrogen cycles Rain N2N2 Nitrogen fixation Phytoplankton Marine food web NH/


Microbial Growth and Destruction

other hand, bacteria are able to use the atmospheric N₂ and can “fix” the nitrogen in a process called nitrogen fixation (the N₂ is converted to a form of nitrogen the plant can use as fertilizer) - nitrogen is needed to make ATP, proteins, DNA, RNA, and peptidoglycan The Nitrogen Cycle Nitrogen fixation, performed by bacteria, transforms atmospheric nitrogen gas into a form of nitrogen plants can use. 4. OXYGEN. - oxygen is needed for/


How do Ecosystems work? Definition of ecosystem Living and non-living interactions Energy flow What about nutrients? On an index card define nutrients?

nutrients: –From nonliving to living –From environmental to organisms Atmospheric Cycles (C & N) Majority of nutrients found in the atmosphere Atmospheric nutrients get incorporated into living organisms –Carbon—photosynthesis –Nitrogennitrogen fixation Nutrients are returned to the environment –C—respiration (all organisms, detritus feeders, decomposers) –N—decomposers and denitrifying bacteria Nitrogen facts Nitrogen is one of the most abundant elements on Earth. 79% of Earths atmosphere is/


By: Ijeoma Odihe Chelseay Parks Andrew Nunn. Definition Nitrogen cycle: Biogeochemical cycle in which nitrogen is transported throughout the Earth. Makes.

Odihe Chelseay Parks Andrew Nunn Definition Nitrogen cycle: Biogeochemical cycle in which nitrogen is transported throughout the Earth. Makes up approximately 78-80% of the Earth’s atmosphere. The Importance of Nitrogen: Why is it necessary? It is essential for the production of DNA and proteins. 80% of the Earth’s atmosphere is comprised of free nitr0gen. Some organisms can use nitrogen directly and some organisms can require oxygen/


Www.radbiol.ucla.edu WMcB2008 Interaction of RT with CT and other Agents Bill McBride Dept. Radiation Oncology David Geffen School Medicine UCLA, Los Angeles,

and DNA-protein inter- and intra- strand crosslinks, inhibiting DNA replication and RNA transcriptionForms DNA-DNA and DNA-protein inter- and intra- strand crosslinks, inhibiting DNA replication and RNA transcription DNA distortion leads to binding of MSH and HMG and other proteinsDNA distortion leads to binding of MSH and HMG and other proteins ATM and ATR, CHK1 and 2 activated for cell cycle arrestATM and ATR, CHK1 and 2 activated for cell cycle arrest With RT, fixation/


BIOGEOCHEMICAL CYCLES:  The RECYCLING of MATERIALS through living organisms and the physical environment. BIOCHEMIST: Scientists who study how LIFE WORKS.

COMBUSTION/BURNING WEATHERING SEDIMENTATION CCARBON CYCLE NNITROGEN CYCLE OOXYGEN CYCLE DEFINITION: The cycling of carbon through the atmosphere, the physical environment, and ecosystems. HOW IMPORTANT IS CARBON for LIFE/nitrogen). HOW DO LIVING ORGANISMS GET NITROGEN? Plants and animals cannot use N 2 gas. We can use nitrogen in TWO FORMS: AMMONIA, NH 3 NITRATES, NO 3- WHAT ARE THE KEY NITROGEN CYCLE PROCESSES? NNITROGEN FIXATION DDENITRIFICATION Also known as NITRIFICATION Gaseous nitrogen/


Note to Mr. McNicholas’ students

of the other. This is the definition of translocation. A. deletion B. /and relationships in an ecosystem Describe how matter recycles through an ecosystem (i.e. water cycle, carbon cycle, oxygen cycle, and nitrogen cycle). Describe how ecosystems change in response to natural and/nitrogen when they are decomposed D.Incorrect – nitrogen fixation removes nitrogen from the atmosphere. Agricultural runoff can carry fertilizers into lakes and streams Agricultural runoff can carry fertilizers into lakes and/


Climate Change: Impacts and Responses Topic 2: The Earths Climate System 1.

-system processes Human activities - fossil fuel combustion, the use of inorganic nitrogen fertilizers, and release of nitrogen in wastewater have altered the global Nitrogen cycle Box 6.2, Figure 1 | Anthropogenic reactive nitrogen (Nr) creation rates (in TgN yr–1) from fossil fuel burning (orange line), cultivation- induced biological nitrogen fixation (blue line), Haber–Bosch process (green line) and total creation (red line). Source: Galloway et al. (2003), Galloway/


LECTURE № 15 Theme: Fused five-, six- and seven-membered heterocycles : properties, analysis, storage, action and use. Associate prof. Mosula L.M.

Nitrogen group–NH has weak acid properties. To derivatives of indole concern many natural and synthetic drugs. Indometacin General Notices (Ph Eur monograph 0092) Indometacinum C19H16ClNO4 357.8  DEFINITION  Indometacin contains not less than 98.5 per cent and/-base fixation, solution of sodium acetate add for nitric acid fixation. Dibasol/and use Antiseptic Antiseptic Derivatives of acridine Acridine is the condensed heterocyclic system, which consist of pyridine and two benzene cycles (or quinoline and/


ECOLOGY Honors Biology. What you will learn…  1. Ecology general overview.  A. Definition  B. Levels of Organization  C. Abiotic vs. Biotic Factors.

Carbon Cycle Nitrogen Cycle  1. Nitrogen in plant and animal tissue  2. Excretion  3. Ammonia (NH 3 )  4.Dead organisms  5. decomposers  6. Nitrifying bacteria (convert ammonia to nitrate)  7. nitrogen fixing bacteria (convert N 2 to ammonia)  8. nitrate (NO 3 - )  9. nitrate (NO 3 - ) available to plants  10. swampy ground  11. denitrifying bacteria (return fixed nitrogen to the atmosphere)  12. lightning (atmospheric nitrogen fixation)  13. atmospheric nitrogen (N/


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