REPORTINGCATEGORY5 - Sharyland High School · )))))FEEDINGRELATIONSHIPS) Food+Web+...
Transcript of REPORTINGCATEGORY5 - Sharyland High School · )))))FEEDINGRELATIONSHIPS) Food+Web+...
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REPORTING CATEGORY 5
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#31-‐CHANGES TO ECOSYSTEMS
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ENVIRONMENTAL CHANGE
Ecosystem – physically distinct, self-‐supporting unit of interacting biotic and abiotic factors
When analyzing how an event will change an ecosystem, keep these questions in mind:
1. Are producers affected? 2. Did nutrient/mineral levels change?
3. Are any organisms directly hurt/killed?
4. Did habitat loss occur?
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#14-‐TROPHIC LEVELS
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FEEDING RELATIONSHIPS
Food Web -‐More realistic path through an ecosystem made of many food chains -‐Energy flows through ecosystems from producers to consumers -‐Producers (make food) aka autotrophs -‐Consumers (use food by eating producers or other consumers) aka heterotrophs ex: herbivores, carnivores, omnivores, decomposers, scavengers
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#42-‐ECOLOGICAL SUCCESSION
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-‐Primary succession is a series of changes that occur in an area where no ecosystem has ever been. -‐Secondary succession occurs when there are a series of changes after a natural disturbance (hurricane, fire, etc..) It only can occur in a place where an ecosystem has already existed. -‐Pioneer species are the first species to populate an area.
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#27-‐CYCLES OF MATTER
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#2-‐ECOLOGICAL SUCCESSION
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GOAL IS A CLIMAX COMMUNITY
Ecosystems develop toward a stable, climax community. Biodiversity increases and plant and animal life becomes more complex.
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#24-‐SYMBIOSIS
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PERMANENT RELATIONSHIPS AMONG ORGANISMS
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#9-‐IMPACT ON AN ECOSYSTEM
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ABSENCE OF A SINGLE TROPHIC LEVEL CAN IMPACT ENTIRE ECOSYSTEMS
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#46-‐ADAPTATIONS
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Adaptation – any variation in an organism that makes it better suited to its environment that usually fulfills a survival requirement Different ecosystems require different adaptations Examples: • Tundra: freezing cold, soil frozen o Plants: short to avoid wind o Animals: migrate to avoid coldest periods • Desert: very little water, can be very hot o Plants: long roots to find water o Animals: large ears to radiate heat
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#37-‐TROPHIC LEVELS
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ENERGY PYRAMIDS
-‐Producers put in 100% of the energy into an ecosystem and form the base of the pyramid -‐Pyramid shape shows a decrease in energy/biomass/numbers as it goes from one trophic level to the next
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#50-‐COMPETITION
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Competition – relationship in which both organisms are harmed from fighting over resources.
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#40-‐MICROORGANISMS
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LIVING THINGS THAT CANNOT BE SEEN WITH
THE NAKED EYE
Maintain Health of Organisms • Help digestion by breaking down compounds • Used for vaccines and antibiotics Maintain Health of Ecosystems • Recycle carbon for plants to use • Recycle nitrogen for plants to use • Create sugars in marine ecosystems Disrupt Health of Organisms • Cause disease like malaria and ringworm Disrupt Health of Ecosystems • When numerous, toxins become concentrated
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#12-‐TROPHIC LEVELS
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10% RULE -‐Energy flows through an ecosystem in one direction from producers to various levels of consumers -‐100% of the energy starts at the producer level -‐At each trophic level, 90% of available energy is lost to heat -‐Each new trophic level only receives 10% of usable energy from the previous level
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#11-‐SYMBIOSIS
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COMMON RELATIONSHIPS
Lichens: Mutualism between:
Fungus (structure) Algae or cyanobacteria (provides food) Mycorrhizae: Mutualism between:
Fungus (nutrient & water uptake for plant)
Plant (carbohydrate for fungus) Bacteria Nodules: cyanobacteria and certain other forms of bacteria, especially those that live in the roots of legumes mutualistically, conduct nitrogen fixation as part of their metabolism