[lollage123]

Could you guys give me help on these questions:

1. When using quadrats, why use a lot of samples?
2. Limitations/Modifications when testing with quadrats?
3. What does simpsons index tell you?
4. Differences between species diversity, species evenness, and species richness?
5. What happens to value of simpsons if you only count grass as 1 species?
6. Is there more or less species diversity in a heavily grazed grassland. why?
7. How will tall plants affect surrounding small plants - in terms of transpiration rate?

Would be extremely grateful for help. Thanks

[sweetiepie]

1. samples give more reliable results, and a better indication of the environment as a whole
2. not really sure to be honest ()
3. Simpsons index measures diversity in a population
4. species diversity - the diversity of a species in a population
species richness - the number of different species in an area
species eveness - measure of the relative abundance of each species in an area
5. then it will get a value close to zero and this means that the area isn't very diverse at all
6. don't know :/
7. the lack of light will slow down the transpiration rate because the stomata is usually closed. when dark, it will probably be cooler too so the transpiration rate will be slower because the water molecules wont have as much energy and wont evaporate from outside the leaf into the cells and the water potential won't increase making diffusion slower. as it might be more protected from wind the transpiration rate will decrease as the lack of air movement wont blow away water molecules from the stomata and the water potential gradient wont increase which therefore wont increase rate of transpiration.

quite handy to test myself haha