Biology-Online • View topic - quadrat investigation

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

hey im also doing the same coursework i was just wondering what the average values are for dry mass calculations, if any one is stuck on the method for dry mass it is below

- Place 100g of soil collected from the centre of the quadrat, take care not to cause damage to any plants.
- Place the soil in an evaparating dish
- Place the dish in a pre heated oven set at 1050c for 24hrs
- After 24hrs re-weigh soil
- Subtract new weight from starting weight
- Divide the weight loss by starting weight and multiply by 100 to give you the percentage of the of water in the soild3

this is were i got it from so you can put it in your bibliograpys

3. Experimental work in biology, 3 soil, D G Mackean 1974

hope this helps

cm5687
Garter

Posts: 8
Joined: Wed May 11, 2005 5:52 pm
Location: Sheffield

i am also doing a similar piece of coursework, i was hoping some one could piont me out in the direction of 2 species which would like watterlogged soils and moist soils
Thanks V.Much
gooner4reva

ps would the chi - squared test be adequate ? is it the same as the t-test?
gooner4reva
Garter

Posts: 1
Joined: Thu May 12, 2005 6:39 pm

hey I'm doing the same coursework as most other people on here, and I found the common plants Dandelions and Daisies quite easy to use.The Daisies were found further away from a river and the Dandelions were found right next to it, so I suppose its fair to say that the dandelions preferred the waterlogged soil and the daisies preferred moist soil isn't it?Although I know that dandelions are an indication of acidic soil aswell. And are dry mass equations the same as finding out the water percentage in the soil? and can anyone tell me how to find the percentage cover using a quadrat?!?!?!
Obmik
Garter

Posts: 1
Joined: Thu May 19, 2005 7:21 pm

### Hey

Im doing a similar coursework and need help . My title is ' Does water content affect the % cover of water pepper plants?' can anyone help me with it. thnx you.
SMILEEEEEEEE!!!
blingsingh
Garter

Posts: 2
Joined: Thu Sep 01, 2005 3:17 pm
Location: LoNdON

First of all, what are water pepper plants?
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

MrMistery
Inland Taipan

Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Water Pepper = Polygonum hydropiper L. or Persicaria hydropiper (L.) Spach
Family = Polygonaceae (Buckwheat)

Dr.Stein
King Cobra

Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia

### THnx

Ive pretty much done upto the method but i need to find out why the % cover of the plant decreases as the soil water content increases. ??? anyone know why? but at the beggining of the trasect is a tree. i.e tree canopy preventing light accessing well to the plants. but there are more plant there? and as i go along its close to a pathway in epping forest. therefore that acn be a reason for less plants available there. So what should my hypothesis be? HELP PLEASEEEEE.
SMILEEEEEEEE!!!
blingsingh
Garter

Posts: 2
Joined: Thu Sep 01, 2005 3:17 pm
Location: LoNdON

Dr.Stein wrote:Water Pepper = Polygonum hydropiper L. or Persicaria hydropiper (L.) Spach
Family = Polygonaceae (Buckwheat)

It was plant of the month How could i have not known about such an important plant?!Thanks for enlightening me
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

MrMistery
Inland Taipan

Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Previous