the scientific study of interactions among organisms and between organisms and their enviroment or surroundings

levels of organization

organis,population,community,ecosystem,biome,biosphere

a group of ecosystems that have the same climate and dominant communities

a group of organisms so similar to one another that they can breed and produce fertile offspring

an organism that makes its own food

when autotrophs use light energy from the sun to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches

when organisms use chemical energy to produce carbohydrates

organisms that rely on other organisms for their energy and food supply

eat plant and animal remains and other dead matter, collectively called detritus

a series of steps in which organisms transfer energy by eating and being eaten

when the feeding relationships among the various organisms in an ecosystem form a network of complex interactions

when chemical energy stored in food is converted into compounds that are easier for the cell to use

each step in a food chain or food web

shows the relative amounts of energy available at each trophic level

elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another through these cycles

when an ecosystem is limited by a single nutrient that is scarce or cycles very slowly

when an aquatic ecosystem recieves a large input of a limiting nutrient-immediate increase in the amount of algae and other producers

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Ch. 3 Vocab-Ecology

Question	Answer
ecology	the scientific study of interactions among organisms and between organisms and their enviroment or surroundings
levels of organization	organis,population,community,ecosystem,biome,biosphere
biome	a group of ecosystems that have the same climate and dominant communities
species	a group of organisms so similar to one another that they can breed and produce fertile offspring
autotroph/producer	an organism that makes its own food
photosynthesis	when autotrophs use light energy from the sun to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches
chemosynthesis	when organisms use chemical energy to produce carbohydrates
heterotroph/consumer	organisms that rely on other organisms for their energy and food supply
herbivore	eat plants
carnivore	eat animals
omnivore	eat plants and animals
detritivores	eat plant and animal remains and other dead matter, collectively called detritus
decomposers	break down organic matter
food chain	a series of steps in which organisms transfer energy by eating and being eaten
food web	when the feeding relationships among the various organisms in an ecosystem form a network of complex interactions
cellular respiration	when chemical energy stored in food is converted into compounds that are easier for the cell to use
trophic level	each step in a food chain or food web
ecological pyramid	shows the relative amounts of energy available at each trophic level
biogeochemical cycle	elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another through these cycles
limiting nutrient	when an ecosystem is limited by a single nutrient that is scarce or cycles very slowly
algal bloom	when an aquatic ecosystem recieves a large input of a limiting nutrient-immediate increase in the amount of algae and other producers

Created by: 15_VRe

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