Nutrient Cycles & Pollution Ecology K. Stacker SEV1. Students will investigate the flow of energy...
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Transcript of Nutrient Cycles & Pollution Ecology K. Stacker SEV1. Students will investigate the flow of energy...
Nutrient Cycles & PollutionEcology
K. Stacker
SEV1. Students will investigate the flow of energy and cycling of matter within an ecosystem and relate these phenomena to human society.
a. Interpret biogeochemical cycles including hydrologic, nitrogen, phosphorus, oxygen, and carbon cycles. Recognize that energy is not recycled in ecosystems.
Essential Question (s):
1). Why are nutrient cycles important?
2). Why is recycling necessary?
3). How do we contribute to pollution?
What to Do!
When ever you see this symbol
Be prepared to write.
Copy Every Question & Answer
What materials are recycled in ecosystems and why?
• Organic substances such as carbon atoms, found in all living organisms, are constantly recycled.
• Inorganic substances like nitrogen, sulfur, calcium, and phosphorus which make up the soil, water, and air are also recycled to help maintain the health of ecosystems.
Biochemical Cycles
Water
Carbon Nitrogen
WATER 5 STEPS
CARBON 3 STEPS
NITROGEN 6 STEPS
Water CycleEvaporation Transpiration(Water loss from lakes..) (water loss
from plant leaves)
↓ ↓
Condensation
(gas changes to a liquid, &
water vapor forms clouds) ↓
Precipitation
(water returns to Earth as sleet, rain, snow..)
↓
Surface Runoff
(returns water to bodies of
water or to groundwater)
1 2
3
4
5
AD
C
B
E
Oxygen Cycle
Carbon CyclePlant Leaves take CO2
from air↓
Plants store C in carbs and starches
(photosynthesis) ↓
Plants release O2.Humans & animals release CO2 back into the air (cellular respiration)
↓ Decomposers return C to
environment (Decomposition)
1
2
3
Nitrogen CycleNitrogen Fixation
↓Convert nitrogen gas into ammonia ↓Ammonia converted to nitrates ↓Plants absorb nitrates to make proteins ↓Consumers eat plants (with protein) ↓Decomposers break down dead
consumers (organisms) & return nitrogen to air (called ammonification)
↓Anaerobic bacteria in soil release
nitrogen from nitrates into air (called denitrification)
1
6
2
5
3
4
Pollution is a chemical or physical change in the air, water, or
soil of an ecosystem that can be harmful to the biotic elements
in an ecosystem.
What is Pollution?
3 Broad Categories
OfPollution
Air PollutionEx. Acid rain and
Smog
Water PollutionEx. Aldicarb (pesticideThat attacks nervous
System)
Soil PollutionEx. Mineral salts (kills
plant life)
What are the forms of Pollution?
SolidTrash
LiquidChemicals
GasCarbon
Monoxide
Forms of
Pollution
What is the Impact of Human Activity?
In your own words summarize the following statements to show how human activity affect the environment:•Earth’s natural resources are being depleted due to large amounts of consumption.•Wildlife habitats are being destroyed due to the clearing of vast areas of forests.•There is a shortage of fresh water due to agriculture, industrial processes, and energy production.•Our air, water, & soil are constantly being polluted•All aspects are in direct relation to population growth
What causes Pollution?Pollutants
In your own words summarize the following statements about pollutants:
• Undesired impurities that accumulate in the environment (air, water, soil).
• Some are biodegradable, able to be decomposed by microorganism
• Some are non-biodegradable and linger in the environment (hazardous chem. wastes-poisonous, radioactive, explosive).
• Examples: pesticides, solid waste, sewage
What is the Greenhouse Effect?
In your own words summarize the following statements:•Extraction of fossil fuels (coal, oil, natural gases) through mining result in environmental damage•Carbon dioxide is a by-product of burning fuel.•The build-up of CO2 in the atmosphere results in the greenhouse effect, which traps radiation from the sun and heats the Earth•Severe climate changes occur.
What is Acid Rain?In your own words summarize the following statements:
•Nitrogen and Sulfur oxides are also produced and emitted into the atmosphere with the use of fossil fuels.
•This results in photochemical smog (smoke, gas, and fog) and acid rain (sulfur oxides and water vapor)
•The aquatic ecosystems are affected by this change in pH levels
Who is Affected?
Everyone!
Humans
Plants Animals
Functional AdaptationsWater-limited environmentsLight limited environmentsSupportive AdaptationsDefensive Adaptations
Reproductive Adaptations AnnualPerennialPreventing self-fertilization
Structural AdaptationTeethBody CoveringsMovementProtective Coloration (Camouflage)Mimicry
Behavior AdaptationsSocial BehaviorBehavior for protectionMigrationHibernation
Plants Animals
How Can We Help the Environment?
Our Lifestyles Affect the Environment
• Learn about the environment
• Conserve energy by walking, riding a bike, or taking public transportation
• Recycle-Preserve our Resources
• Create rich soil by making compost (leaves, grass, fruit peelings)
• More Suggestions!
ABIOTIC FACTORS & NUTRIENT CYCLES
BIOLOGICALLY SPEAKING:ECOSYSTEMS AND CYCLES IN NATURE