basic knowledge Flashcards
(24 cards)
what is species diversity
variety of species within a given ecosystem
what is species richness
number of different species within a given ecosystem
what are keystone species
species with a large impact to the environment compared to their abundance
what is biodiversity
the large range of species and variations within an ecosystem
what is a keystone example
small amount of elephants but they destroy the trees in the savannah
what is abundance
total number of individuals in a particular species
what is species evenness
relative abundance
distribution of species in an ecosystem
what are the levels of organisation on earth
biosphere - biome - ecosystem - community - population - species
what is an ecosystem
biological community of interacting organisms
what is a biome
naturally occurring community of biotic and biotic factors
what does abiotic mean
non living factors that you can measure
they influence organisms and environment
what are some abiotic factors
sunlight, pH levels, soil type, temperatures
what does biotic mean
the living factors within an ecosystem,
they can influence other organisms or environment
what are some biotic examples
just living things
what are producers
plants, seeds, dead matter
what do producers do
convert CO2 into glucose
photosynthesis
use solar radiation as energy source
what are 1st order consumers
primary consumer - herbivores
what are 2nd order consumers
secondary consumers - carnivores
what are third order consumers
tertiary consumers - carnivores that prey on carnivores
parasites + scavengers
what are omnivores
they eat meat and plants
what are carnivores
they eat meat
hyper carnivores 70%+ meat
hypo carnivores 30%- meat
what are scavengers
eat dead animals they didnt kill
adapted to eat rotting meat/carcass
what are decomposers
convert organic matter into inorganic materials
recycles stuff into the environment
MRS GREN
movement, respiration, sensitivity
growth, reproduction, excretion, nutrition
