U7T5 – Populations in Ecosystems

What is the word used to describe 'Populations of different species in specific habitat'?

What is the word used to describe 'The specific role of a species within its habitat'?

What is the word used to describe 'All the different populations in a habitat along with all the abiotic conditions'?

True or False : Two different species cannot occupy the same niche?

Is the following an 'Abiotic adaptation' or a 'Biotic Adaptation': The Warbler Finch has a short slender beak for catching insects whilst, flying. Where as the Large Ground Finch has a strong , deep beak for crushing seeds.

Is the following an 'Abiotic adaptation' or a 'Biotic Adaptation': Monarch butterflies fly south when the number of daylight hours shorten?

Which of the following is an abiotic factor which effects population size?

A mild winter and a warm spring meant that the population of robins (birds which feed on insects) increased. This was due to the above average biomass of insects, so more young robins survived. However the following winter was very cold so fewer insects were available in the spring, and the robin population decreased. Is the decrease in robin population, intraspecific competition or interspecific competition?

Was the cold winter an example of an abiotic factor or a biotic one?

Was the reduction in insects caused by the cold weather an abiotic factor or a biotic factor?

Is predation a biotic or abiotic factor that effects population size?

Population growth can be exponential . How would we turn a curved population curve into a straight line graph?

What would you press to show a bacterial population graph , plotted with a log 10 scale, back into actual bacterial population?

What should you use to estimate a population of a sessile organism?

Why is random sampling used?

How many samples should you take to get reliable data?

You can also use a transect to sample a population. When should a transect be used?

What is the advantage of carrying out an interrupted belt transect compared to belt transect?

What is the equation for Mark Release Recapture?

Which of the following is not an assumption that affects the accuracy of the Mark Release Recapture population estimate?

Which method would you use to see if there is a correlation between profile height and percentage cover of marsh grass?

Which method would you use to see if there is a difference between the percentage cover of moss on the north face compared to the south face of tree trunks?

Using mark release recapture, what would the population of woodlice be if : 27 were caught in the first sample , and 16 unmarked caught in the second, and 3 were marked?

A student is using a quadrat to estimate percentage cover of clover on the school field. What is the most accurate way to do this?