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

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cm5687
Garter
Posts: 8
Joined: Wed May 11, 2005 5:52 pm
Location: Sheffield
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

gooner4reva
Garter
Posts: 1
Joined: Thu May 12, 2005 6:39 pm
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?

Obmik
Garter
Posts: 1
Joined: Thu May 19, 2005 7:21 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?!?!?!

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

### 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!!!

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

Dr.Stein
King Cobra
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Location: 55284 Yogyakarta, Indonesia
Contact:
Water Pepper = Polygonum hydropiper L. or Persicaria hydropiper (L.) Spach
Family = Polygonaceae (Buckwheat)

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

### 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!!!

MrMistery
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:
Dr.Stein wrote:Water Pepper = Polygonum hydropiper L. or Persicaria hydropiper (L.) Spach
Family = Polygonaceae (Buckwheat)