Scientific study of interactions among organisms and between organisms and their environment, or surroundings.

contains the combined portions of the planet.

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

groups of individuals that belong to the same species and live in the same area.

assemblages of different populations that live together in a defined area.

a collection of all the organisms that live in a particular place.

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

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

they make their own food, autotrophs, like the kelp.

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

this process is performed by several types of bacteria.

organisms that rely on other organisms for their energy and food supply. they are also called consumers.

obtain energy by eating only plants.

humans, bears, crows, and others

such as mites, earthworms, snails, and crabs, feed on 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.

links all the food chains in an ecosystem.

each step in a food chain or food wen is a trophic level.

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

is usually expressed in terms of grams of organic matter per unit area.

Biogeochemical cycles

In ecology and Earth science, a biogeochemical cycle or nutrient cycle is a pathway by which a chemical element or molecule moves through both biotic and abiotic.

the process by which water changes from liquid form to an atmospheric gas.

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Chapter 3 Vocab Ds

Chapter 3 Vocab

Term	Definition
Ecology	Scientific study of interactions among organisms and between organisms and their environment, or surroundings.
Biosphere	contains the combined portions of the planet.
Species	a group of organisms so similar to one another that they can breed and produce fertile offspring.
Populations	groups of individuals that belong to the same species and live in the same area.
Communities	assemblages of different populations that live together in a defined area.
Ecosystem	a collection of all the organisms that live in a particular place.
Biome	a group of ecosystems that have the same climate and similar dominant communities.
Autotrophs	use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules.
Producers	they make their own food, autotrophs, like the kelp.
Photosynthesis	autotrophs use light energy to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches.
Chemosythesis	this process is performed by several types of bacteria.
Heterotrophs	organisms that rely on other organisms for their energy and food supply. they are also called consumers.
Consumers	heterotrphs.
Herbivores	obtain energy by eating only plants.
Carnivores	eat animals.
Omnivores	humans, bears, crows, and others
Detritivores	such as mites, earthworms, snails, and crabs, feed on plant and animal remains and other dead matter, collectively called detritus.
Decomposers	breaks down organic matter.
Food chain	a series of steps in which organisms transfer energy by eating and being eaten.
Food web	links all the food chains in an ecosystem.
Trophic level	each step in a food chain or food wen is a trophic level.
Ecological pyramid	is a diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or food web.
Biomass	is usually expressed in terms of grams of organic matter per unit area.
Biogeochemical cycles	In ecology and Earth science, a biogeochemical cycle or nutrient cycle is a pathway by which a chemical element or molecule moves through both biotic and abiotic.
Evaporation	the process by which water changes from liquid form to an atmospheric gas.

Created by: dorothystuart

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