Chapter 24- Populations and Sustainability Flashcards
Why x is an example of conservation rather than preservation?
- there are ppl there
- sustainable use
- area used for x
- active measures to maintain biodiversity/ habitat
Disadv of using human sightings to estimate population size of animal?
- lying
- misidentification
- x tend to be in places humans are not
Disadv of using footprints to estimate population size of animal?
- misidentification
- footprint not always left
Why not appropriate to use capture-recapture to estimate population size?
- dangerous for collector + animal
- estimate will be inaccurate bc of low numbers
conservation?
- maintains biodiversity
- involves sustainable management
Preservation?
-leaves ecosystems undisturbed
What effect prey may have on population size of predator?
- predator no would rise and fall
- predation is density dependent
Why two areas of the same size were monitored?
- for comaprison/ to see real effect of IV
- fair test
The study of the interactions between organisms and their environment?
-ecology
How you would measure the distribution and abundance of plants over 100m?
- tape measure laid over 100m
- line transect placed at selected intervals. so interupted. count and record species touching at these intervals
- use quadrat to record % cover of plants
- use ACFOR scale
- use key to identify species
- data recording sheets prepared in advance
How plenty of food will increase population?
survive and reproduce successfully
How few predators will increase population?
few die before breeding
Why population of x will not increase indefinitly?
- reaches carrying capacity
- intraspecific competition for food/ shelter
- interspecific competiton with …
- larger populations attract more predators so diseases spread more easily
