Ecosystems Flashcards
what does biotic mean
living things in an eccosystem
give examples of micro organisms
fungi and bacteria - decomposers
what is soil needed for
nutrients for plants
homes for insects
food shelter for animals
what makes up an eccosystem
plants animals and there surroundings microorganisms and soil
what are abiotic components give examples of abiotic components
non living - rock soil sun and rain
how are abiotic and biotic systems linked
physically animals eating plants
chemically the acid in rain speeds up decay
how do rocks help the ecosystem
rocks erode and help soil to form
what do all ecosystems depend on
constant light from sun, rain from atmosphere
how is change brought about in an ecosystem
animals and plants move about from one place to another
how big is an ecosystem
can be any size
name 4 types of ecosystem
local - habitat
regional - lake district
global biomes- rainforests
earth- all planets organisms are linked
what is biomass
living vegetation and animals
what are primary producers in a food chain
plants as they photosynthesis
what are primary consumers in a food chain why and give an examole
herbivores as they et plants eg rabbit
what are secondary consumers in a food chain and why give an example
carnivore as they eat herbivores eg fox
what are top carnivores in a food chain why and give examples
carnivores who eat other carnivores eg lion or wolf
How is the relationship between consumers, carnivores, herbivores shown
in a food chain
give 2 reasons why weight or biomass gets small at each level in a food chain
many parts of a plant or animal are not eaten and much of what animals eat is excreted
energy is lost at each level - hunters use kinetic energy when chasing prey. Energy is constantly used in respiration and to stay alive .
what are decomposers
organisms that over time break down dead organic matter and help return nutrients to the soil
what are detritivores
bacteria
