Is the scientific study of interactions among organisms and between organisms and their environment, or surroundings

Levels of Organization

Species, populations,communities,ecosystems, 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

use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules

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

liks all the food chains in an ecosystem together

process that releases energy by breaking down glucose and other food molecules in the presence of oxygen

each step in a food chain or food web

diagram that shows that relative amounts of energy or matter within each trophic level in a food chain or food web

elements, chemmical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another

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

when an aquatic ecosystem receives a large input of limiting nutrient

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Chapter 3 Vocab

Question	Answer
Ecology	Is the scientific study of interactions among organisms and between organisms and their environment, or surroundings
Levels of Organization	Species, populations,communities,ecosystems, 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/producers	use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules
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
detritivore	eat plant and animal remains and other dead matter, collectively called detritus
decomposer	break down organic matter
food chain	a series of steps in which organisms transfer energy by eating and being eaten
food web	liks all the food chains in an ecosystem together
cellular respiration	process that releases energy by breaking down glucose and other food molecules in the presence of oxygen
trophic level	each step in a food chain or food web
ecological pyramid	diagram that shows that relative amounts of energy or matter within each trophic level in a food chain or food web
biogeochemical cycle	elements, chemmical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
limiting nutrient	when an ecosystem is limited by a single nutrient that is scarce or cycles very slowly
algal bloom	when an aquatic ecosystem receives a large input of limiting nutrient

Created by: jdueker

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