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Transcript of Ecology SCI.9-12.B-6 - [Standard] - The student will demonstrate an understanding of the...
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EcologySCI.9-12.B-6 - [Standard] - The student will demonstrate an
understanding of the interrelationships among
organisms and the biotic and abiotic components of their
environments.1
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SCI.9-12.B-3.6 - [Indicator] – Illustrate the flow of
energy through ecosystems (including food chains, food
webs, energy pyramids,number pyramids, and
biomass pyramids).
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Energy Flow Through an Ecosystem
Food Chains, Food Webs, Food Chains, Food Webs, Energy PyramidsEnergy Pyramids
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ALL ENERGYALL ENERGY
•Begins with the Begins with the SUNSUN
•With With PhotosynthesisPhotosynthesis
6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2
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Photosynthesis Photosynthesis
DO NOT COPYDO NOT COPY•Chemical reaction where green plants use Chemical reaction where green plants use water & carbon dioxidewater & carbon dioxide to store the to store the sun’s sun’s energy in glucoseenergy in glucose
•ENERGY is stored in glucoseENERGY is stored in glucose
•Glucose is stored as starch in plantsGlucose is stored as starch in plants
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Organisms that Organisms that can make glucose can make glucose
during during photosynthesis photosynthesis
are calledare called PRODUCERS.
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Producers Producers use use most of the most of the energy they energy they
makemake for for themselves.themselves.
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Producers use Producers use cellular cellular
respirationrespiration to to supply the supply the
energy they energy they need to live.need to live.
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CELLULAR CELLULAR RESPIRATION RESPIRATION is is
the chemical the chemical reaction that reaction that releases the releases the
energy in energy in glucoseglucose..It makes It makes
energy in the energy in the form of ATP.form of ATP.
6O2 + C6H12O6 --> 6H2O + 6CO2 + energy
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The The energy that is energy that is not used by not used by
producersproducers can be can be passed on to passed on to
organisms that organisms that cannot make their cannot make their
own energy.own energy.copyright cmassengale
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Organisms that Organisms that cannot make their cannot make their
own energy are own energy are called called
CONSUMERS.CONSUMERS.copyright cmassengale
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There are 4 general types of consumers:
Herbivores eat only plantsCarnivores eat only animalsOmnivores eat plant and animals
Decomposers break down decaying organisms
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Herbivores
Zebras eat grass. They are
herbivores.
Cows are herbivores.
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Herbivores
Hippos are herbivores.
Rhinos are herbivores.
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Carnivores
Lions definitely eat meat!
Not all carnivores have razor sharp
teeth.
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Consumers that eat Consumers that eat producersproducers to get energy: to get energy:
•Are primary consumers
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SCI.9-12.B-3.6 - [Indicator] – Illustrate the flow of
energy through ecosystems (including food chains, food
webs, energy pyramids,number pyramids, and
biomass pyramids).
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A Consumer that Eats A Consumer that Eats Another Consumer for Another Consumer for
Energy:Energy:•Is called a Is called a secondary secondary consumerconsumer
•May be a May be a carnivorecarnivore or a or a omnivoreomnivore
•May be a May be a predatorpredator
•May be a May be a scavengerscavenger
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A consumer that eats a A consumer that eats a consumer that already consumer that already
ate a consumer:ate a consumer:
•Is called a tertiary Is called a tertiary consumerconsumer
•May be a May be a carnivore, carnivore, a omnivore,a omnivore, predator predator or a or a scavengerscavenger
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Consumers that eat Consumers that eat other dead other dead
consumers are called consumers are called
scavengersscavengers
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The The transfer of energytransfer of energy from the from the sunsun to to producerproducer to primary consumer then to primary consumer then to higher order to higher order consumersconsumers can be shown in acan be shown in a FOOD FOOD
CHAIN.CHAIN.
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A lotA lot of the energy is lost of the energy is lost as as heatheat, but some energy , but some energy is stored and can is stored and can passed passed on to another consumer.on to another consumer.
****10% rule 10% rule – only – only 10%10% of the of the energy at one level is energy at one level is transferredtransferred to to the next the next
level.level.
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More Food ChainsMore Food Chains
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Food Webs:Food Webs:
•Are Are interconnected interconnected food chainsfood chains
•They show They show the the feeding feeding relationships relationships in an in an ecosystemecosystem
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Food Chains Show Available Food Chains Show Available EnergyEnergy
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Another way Another way of showing of showing the transfer the transfer of energy in of energy in
an an ecosystem is ecosystem is
thetheENERGY ENERGY
PYRAMIDPYRAMID
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Energy Pyramids ShowEnergy Pyramids Show •Amount of available Amount of available energy energy decreasesdecreases for for higher consumershigher consumers
•It takes a It takes a large large number of producersnumber of producers to to support a small support a small number of primary number of primary consumersconsumers
•It takes a It takes a large large number of primary number of primary consumersconsumers to support a to support a small number of small number of secondary consumerssecondary consumers
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How Many Chains are in this web?
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Identify the Producers, Consumers, & Identify the Producers, Consumers, & Decomposers:Decomposers:
Count the Count the Food Food
Chains!Chains!
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We can show what goes on with the help of a Food Web
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What would happen if a disease killed off many of the hawks?
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There will be nothing to eat the snakes, so their numbers will increase.
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All the frogs get eaten
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No frogs.
More crickets
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Most of the cattail gets eaten by the crickets
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Now the crickets don’t have enough food so their numbers go down
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..and so on. Numbers of each species have an effect on the numbers of the other species in the web.
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SCI.9-12.B-3.6 - [Indicator] – Illustrate the flow of
energy through ecosystems (including food chains, food
webs, energy pyramids,number pyramids, and
biomass pyramids).
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What is ecological succession?
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SCI.9-12.B-6.3 - [Indicator] - Illustrate the processes of succession in ecosystems.
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This series of predictable changes that occurs in a community over time is called ecological succession.
Sometimes, an ecosystem changes in response to an abrupt disturbance. At other times, changes occur gradually.
There are two types: primary and secondary.
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Primary SuccessionOn land, succession that occurs on surfaces where no soil exists is called primary succession. For example, primary succession occurs on rock surfaces formed after volcanoes erupt.
The first species to populate the area are called pioneer species.
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The first organisms are The first organisms are alwaysalways plants!! plants!!
AutotrophsAutotrophs that make that make their their ownown food food
Then Then smallsmall animals animals (bugs) come in. Then (bugs) come in. Then
largerlarger plants plants, then larger , then larger animalsanimals..
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In this example, a volcanic eruption has destroyed the previous ecosystem.
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The first organisms to appear are lichens.
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Mosses soon appear, and grasses take root in the thin layer of soil
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Eventually, tree seedlings and shrubs sprout among the plant community.
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Secondary SuccessionAll or part of an ecosystem can be changed by natural events, such as fires.
When the disturbance is over, community interactions that replace the ecosystem to its original condition are called secondary succession.(Think of this as a replacement community.)
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SCI.9-12.B-6.3 - [Indicator] - Illustrate the processes of succession in ecosystems.
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Population-all of the individuals of a species that live together in one place at one time.
Demography-the statistical study of populations. It is used to predict how the size of a population will change.
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SCI.9-12.B-6.2 - [Indicator] - Explain how populations are affected by limiting factors (including density-dependent, density-independent, abiotic, and biotic factors).
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1. Population sizePopulation size – is the number of individuals in a population. – has an important effect on the ability of the population to survive.
Carrying Capacity – number of organisms an ecosystem can support
(don’t copy) A small population is more likely to become extinct:
-in the case of random events or natural disaster-due to inbreeding where the population is more genetically alike. Recessive traits are more likely to appear.-with reduced variability it is harder to adapt to changes.
KEY FEATURES OF POPULATIONS
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2. Population density Population density – the number of individuals in a given area.– if they are too far apart they may only rarely encounter one another resulting in little reproduction.
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Carrying capacity – The number of organisms that an environment can support.
This can change if the environment changes.
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Exponential growth Logistic Growth
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Normal carrying capacity
Carrying capacity changed over time due to a change in the environment.
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KEY FEATURES OF POPULATIONS, con’tPopulation size is limited by:
density-dependent density-dependent factorsfactors
Biotic factorsBiotic factorsDiseaseDiseaseCompetitionCompetitionPredatorsPredatorsParasitesParasitesFood Food CrowdingCrowding
The greater the The greater the population, the population, the greater effect these greater effect these factors have.factors have.Ex. Black plague in Ex. Black plague in the Middle Ages – the Middle Ages – more deaths in citiesmore deaths in cities
density-independent density-independent factorsfactors
abiotic factorsabiotic factorsVolcanic eruptionsVolcanic eruptionsTemperatureTemperatureStormsStormsFloodsFloodsDroughtDroughtChemical pesticidesChemical pesticidesMajor habitat Major habitat disruption (as in the disruption (as in the New Orleans New Orleans flooding)flooding)
Most are abiotic factorsMost are abiotic factors
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SCI.9-12.B-6.4 - [Indicator] - Exemplify the role of organisms in the geochemical cycles (including the cycles of carbon, nitrogen, and water).
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Cycles of MatterA. Recycling in the
BiosphereB. The Water CycleC. Nutrient Cycles
1. The Carbon Cycle2. The Nitrogen
Cycle3. The Phosphorus Cycle
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*Energy is not the only thingthat moves through the ecosystem.
Atoms are never destroyed . . . only transformed.
http://mff.dsisd.net/Environment/Cycles.htm
Take a deep breath.The atoms you just inhaled may have been inhaled by a dinosaur millions of years ago.
http://educ.queensu.ca/~fmc/august2004/pages/dinobreath.html
ENERGY & MATTER
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4 ATOMS make up 95% of the body in most organisms
CARBON
HYDROGEN
OXYGEN
NITROGEN
The same molecules are passed around
again and again within the biosphere in
___________________________BIOGEOCHEMICAL CYCLES
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WATER CYCLE= ___________________HYDROLOGIC CYCLE
http://www.urbanrivers.org/water_cycle.html
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WHY IS WATER IMPORTANT?
http://www.lsbu.ac.uk/water/molecule.htm
building blocks of cMakes up 60-70% of your bodyOxygen and Hydrogen are found in all the ________________________: carbohydrates, proteins,
nucleic acids, lipids
Hydrogen in H2O supplies protons (H+) & electrons for_______________ells
photosynthesis
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WHY IS WATER IMPORTANT?Water is a good _________________Many molecules dissolve in water so itprovides a place for chemical reactionsto happen
Water doesn’t change temperature easily so it helps with__________________
http://www.lsbu.ac.uk/water/molecule.htm
SOLVENT
HOMEOSTASIS
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WATER CYCLE
evaporation
condensation
http://www.radio-canada.ca/jeunesse/fd6/000_images/cat/c_buee_c.gif
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The return of water tothe surface in the form ofrain, snow, sleet, hail, etc.= ____________________
The evaporation of water from the surface of plant leaves = ________________
http://www.css.cornell.edu/faculty/hmv1/watrshed/Etrans.htm
TRANSPIRATION
PRECIPITATION
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PH ONLINE LINK Put in code: cbp-2033 Choose Start
Image edited from: http://www.cotf.edu/ete/modules/msese/earthsysflr/water.html
WATER CYCLE
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Terms for water cyclePrecipitationEvaporation
TranspirationCondensationRunoff
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CARBON CYCLECO2 inatmosphere
CO2 inocean
BIOLOGY; Miller and Levine; Prentice Hall; 2006
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SCI.9-12.B-6.4 - [Indicator] - Exemplify the role of organisms in the geochemical cycles (including the cycles of carbon, nitrogen, and water).
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4 main CARBON reservoirs in BIOSPHERE
CO2 inatmosphere
CO2 inOcean
BIOLOGY; Miller and Levine; Prentice Hall; 2006
1. In ____________ as CO2 gas 2. In _______ as dissolved CO2 gas3. On _______ in organisms, rocks, soil4. __________ as coal & petroleum (fossil fuels) and calcium carbonate in rocks
atmosphere
ocean
land
Underground
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Where does CO2 in atmosphere come from? CO2 in
atmosphere
CO2 inOcean
BIOLOGY; Miller and Levine; Prentice Hall; 2006
3. _________________ plants and animals release CO2 through respiration and decomposition
4.____________ of dead organisms
2. Human activity (burning fossil fuels)
Cellular respiration
Decomposition
1. Volcanic activity
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WHY IS CARBON IMPORTANT?
Found in all the _______________ of cells: carbohydrates, proteins,
nucleic acids, lipids
Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
BUILDING BLOCKS
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WHY IS CARBON IMPORTANT?
Carbon in CO2 provides the atoms for __________ production during __________________... the fuel that all living things depend on.
http://www.science.siu.edu/plant-biology/PLB117/JPEGs%20CD/0076.JPG http://www.biologyclass.net/mitochondria.jpg
GLUCOSE
PHOTOSYNTHESIS
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Terms for Carbon cyclePhotosynthesisCellular RespirationCombustionDecomposition
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N2 in Atmosphere
NH3
NO3-
and NO2-
Section 3-3
NITROGEN CYCLE
BIOLOGY; Miller and Levine; Prentice Hall; 2006
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WHY IS NITROGEN IMPORTANT?
Image by Riedell
NITROGEN BASES make DNA and RNA
Adenine (nitrogen base) is used in ATP
Makes AMINO part of amino acids (proteins)
Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
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79% of the atmosphere is made up of NITROGEN gas (N2)
Image by Riedell Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
BUT we _____ use the nitrogen gas we breathe!
The bond in N2 gas is sostrong it can only be broken by__________________________________________________
CAN’T
lightning
Volcanic activity
few special bacteria
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http://www.slic2.wsu.edu:82/hurlbert/micro101/images/101nodules21.gif
Bacteria that live ______________and in _________ relationships withplants called _________, take nitrogen from the atmosphere and turn it into ______________, a form that is usable by plants.
THIS PROCESSIS CALLED_________________
in the soil
symbiotic
legumes
AMMONIA (NH3)
NITROGEN FIXATION
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Image from: http://www.utdallas.edu/images/departments/biology/misc/gonzalez-image.jpg and http://www.cibike.org/CartoonEating.gif modified by Riedell
Other bacteria in the soil convertammonia into ________________& _________________which plants can also use. The nitrogen we need for proteins, ATP, and nucleic acids comes from
the ___________ ___________ we breathe!
NITRATES (NO3- )
FOOD WE EAT
NOT THE AIR
& NITRITES (NO2-)
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N2 in Atmosphere
NH3
NO3-
and NO2-
Section 3-3
NITROGEN CYCLE
BIOLOGY; Miller and Levine; Prentice Hall; 2006
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Bacteria that live ______________also carry out the reverse process
___________ → _____________.
THIS PROCESSIS CALLED_________________
in the soil
NITRATES & NITRITES
NITROGEN GAS
DENITRIFICATION
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N2 NH3 NO2 NO3 N2
Nitrogen ammonia nitrite nitrate
ammonification nitrification denitrification
All of these processes are done by bacteria.
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Terms for Nitrogen CycleAmmonificationNitrificationDenitrificationNitrogen Fixation by bacteria
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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”to complete cycle
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SCI.9-12.B-6.4 - [Indicator] - Exemplify the role of organisms in the geochemical cycles (including the cycles of carbon, nitrogen, and water).
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Phosphorus cycle is only biogeochemicalcycle that does NOT cycle through the
______________
BIOLOGY; Miller and Levine; Prentice Hall; 2006
atmosphere
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WHY IS PHOSPHORUS IMPORTANT?
Image by Riedell
Makes DNA and RNA
Transfers energy as ATP
Makes phospholipids for cell membranes
Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
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SCI.9-12.B-6.1 - [Indicator] - Explain how the interrelationships among organisms (including predation, competition, parasitism, mutualism, and commensalism) generate stability within ecosystems.
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Copyright Pearson Prentice Hall
Community Interactions
SymbiosisAny relationship in which two species live closely together is called symbiosis.
Symbiotic relationships include: mutualismcommensalism parasitism
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Copyright Pearson Prentice Hall
Community Interactions
Mutualism: both species benefit from the relationship.
Commensalism: one member of the association benefits and the other is neither helped nor harmed.
Parasitism: one organism lives on or inside another organism and harms it.
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Species InteractionsPredation
An interaction in which one organism captures and feeds on another organism is called predation.
The organism that does the killing and eating is called the predator, and the food organism is the prey.
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SymbiosisAny relationship in which two species live closely together is called symbiosis.Symbiotic relationships include:
mutualismcommensalism parasitism
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SCI.9-12.B-6.1 - [Indicator] - Explain how the interrelationships among organisms (including predation, competition, parasitism, mutualism, and commensalism) generate stability within ecosystems.
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Mutualism: both species benefit from the relationship + + Ex: Bacteria in human intestines – bacteria gets a place to live and we get water reabsorbed
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Commensalism: one member of the association benefits and the other is neither helped nor harmed. + 0 Ex. Barnacles on a whale The barnacles get a place to live and transportation and the whales don’t even know the barnacles are there.
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Parasitism: one organism lives on or inside another organism and harms it. + - Ex. Tapeworm and human Tapeworm gets food digested and brought to it and the human is harmed.
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There are two types of parasites:
1. Endoparasites live on the inside of the host.
2. Ectoparasites live on the outside of the host.
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SCI.9-12.B-6.1 - [Indicator] - Explain how the interrelationships among organisms (including predation, competition, parasitism, mutualism, and commensalism) generate stability within ecosystems.
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