Using Daphnia to Monitor Water Toxicity

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nataliexoxo334
Posts: 2
Joined: Mon Nov 23, 2009 4:59 pm
Occupation: Student: 10th Grade
Project Question: Can run-off from parking lots be toxic to organisms in nearby ponds and streams?
Project Due Date: Sometime in January
Project Status: I am just starting

Using Daphnia to Monitor Water Toxicity

Post by nataliexoxo334 »

I was wondering if anyone could tell me exactly how much water or how much sediment to use in step 7?
Thanks. :?:
ScienceExpert123
Former Expert
Posts: 102
Joined: Sat Sep 20, 2008 9:26 am
Occupation: Student
Project Question: n/a
Project Due Date: n/a
Project Status: Not applicable

Re: Using Daphnia to Monitor Water Toxicity

Post by ScienceExpert123 »

what are you referring to when you said "step 7"?
nataliexoxo334
Posts: 2
Joined: Mon Nov 23, 2009 4:59 pm
Occupation: Student: 10th Grade
Project Question: Can run-off from parking lots be toxic to organisms in nearby ponds and streams?
Project Due Date: Sometime in January
Project Status: I am just starting

Re: Using Daphnia to Monitor Water Toxicity

Post by nataliexoxo334 »

Under experimental procedure, towards the bottom, there is a #7.
MelissaB
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Joined: Mon Oct 16, 2006 11:47 am

Re: Using Daphnia to Monitor Water Toxicity

Post by MelissaB »

I believe the student is referring to: https://www.sciencebuddies.org/science- ... ?from=Home. It this is right, the idea is to use different amounts of both. I would probably only use 1-10g of sediment in half a liter or so of water...but I'm just guessing. Try that and see if it really does look like runoff from a storm; if it's too murky or not murky enough, add more sediment or water.
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