5.6 Flashcards
Chemosynthetic
Describes organisms that produce organic material using energy released from chemical reactions rather than light
Food chains
A diagram the shows how the energy stored in one organism is passed to another
Food webs
A diagram with lots of different types of food chains to show that animals eat more than one type of food
Trophic level
a level within a food chain, food web or food pyramid
First-order consumer
An organism that is within the second trophic level of a food chain also known as a primary consumer
Second-order consumer
An organism that is within the third trophic level of a food chain also known as a secondary consumer
Energy pyramid
a representation of the level of food energy at each level within a food chain
Pyramid of numbers
A representation of the population of a particular organism
Pyramid of biomass
A representation of the dry mass of organisms at each level within a food chain
Birth rate
The number of organisms that are born within a particular period of time
Death rate
The number of organisms that die within a particular period of time
Immigration
The number of individuals moving to a particular area
Emigration
The number of individuals leaving a particular area
Exponential growth
a rapid increase in number or size, represented by a J shaped graph
Sigmoid
the shape of a graph that shows a population increasing in number then reaching a plateau
Equilibrium
a state in which conditions are balanced and there is neither growth nor a decrease in number,also known as steady state or plateau phase
Zero population growth
The point at which birth and death rates balance each other out
Carrying capacity
the maximum population size that a particular environment can sustain
