5.6 - Sustainable ecosystems Flashcards
Chemosynthetic
Describes organisms that produce organic material using energy released from chemical reactions rather than light
Food chains
Diagram that shows how the energy stored in one organism is passed to another
Food webs
diagram showing several food chains joined together to demonstrate that animals eat more than one type of food
Trophic levels
a level within a food chain, food web or food pyramid
Primary Consumer (First-order consumer)
organism that is within the second trophic level of a food chain (herbivores); also known as a primary consumer
Secondary Consumer (second-order)
organism that is within the third trophic level of a food chain (carnivores); 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, or numbers of organisms, at each level within a food chain
Pyramid of biomass
a representation of the dry mass of organisms at each level within a food chain
Birth rate
the number of organisms within a population that are born within a particular period of time
Death rate
the number of organisms within a population that die within a particular period of time
Immigration
the number of individuals moving into an area
Emigration
the number of individuals leaving an 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
