Dist. of organisms 3.2 Flashcards
what is a biotic factor ,
a living factor that effects an organisms niche
name 5 biotic factors
grazing, predation, food availability, disease, competition
what is an abiotic factor
a non-living factor that effects and organisms niche
state 4 abiotic factors
pH, temperature, moisture, light intensity
what do you use to sample light intensity
light metre
at is one mistake you can do when sampling light intensity
casting your own shadow over it
what do you use to measure temperature
thermometer
what is an error you can make when using a thermometer
not leaving it in for long enough
how do you measure pH
pH meter
what is an error you can make while measuring pH
it gets contaminated as you dont wipe it down before every use
how do you measure soil moisture
moisture meter
what is an error you can make when using a moisture meter
dont wipe it down before every use (contamination)
how do you use a quadrat
you throw it randomly multiple times in an area ,the number of squares containing the species you are sampling is counted this is called the abundance
what does a pitfall trap do
it samples the number of ground invertabrates
an error when using pitfall traps
not camouflaging it to ensure predators dont eat the captured organisms
