Red Sea Root Therm 160

Thank you for clarifying Tom, I appreciate it. I just felt a little ganged up on, and didn't feel like being knocked of the fence.

If you get a chance, could you check on the claims Walstad makes regarding "conclusive" and "definitive" evidence that Dwarf spikerush releases allelochemicals that are inhibitory? The cited works/studies were:

Frank PA and Dechoretz N. 1980. Allelopathy in dwarf spikerush (Eleocharis coloradoensis). Weed Sci 28. 499-505.

Ashton FM, Di Tomaso JM, and Anderson LWJ. 1985. Spikerush (Eleocharis spp.): A source of allelopathics for the control of undesirable aquatic plants. In: Thompson AC (Ed.). The Chemistry of Allelopathy, ACS Symposium Series 268, pp 401-414.


This seems to be the most solid evidence she provided for allelopathic existence in aquatic plants. Looking through the references however, there are quite a few studies listed that seem to at least "assume" the presence and activity of allelopathic chemicals in aquatic plants.


Thank you for your time and effort,
Geoff
 
geofied said:
Frank PA and Dechoretz N. 1980. Allelopathy in dwarf spikerush (Eleocharis coloradoensis). Weed Sci 28. 499-505.
Click to expand...

Nate Dechoretz is my old boss from the IPC unit at CDFA:idea:

Ashton FM, Di Tomaso JM, and Anderson LWJ. 1985. Spikerush (Eleocharis spp.): A source of allelopathics for the control of undesirable aquatic plants. In: Thompson AC (Ed.). The Chemistry of Allelopathy, ACS Symposium Series 268, pp 401-414.
Click to expand...

Lars and Joe are my bosses.
I know these folks personally and have spent years working with them.
I know their research, they are here in the Sac/Davis area.

This seems to be the most solid evidence she provided for allelopathic existence in aquatic plants. Looking through the references however, there are quite a few studies listed that seem to at least "assume" the presence and activity of allelopathic chemicals in aquatic plants.


Thank you for your time and effort,
Geoff
Click to expand...

It does not occur in the field.
It's that simple.
here is standard allelopathic aquatic research paper:
http://www.springerlink.com/content/t301237q16171560/

Hardly conclusive evidence.
Ecological impacts are never noted....................
Bioassays, plants that are ground up and the concentrated juice added to the test well in a lab is not the same as the live plant in our tank.

She has not show anything nor proven a thing other than speculation in our tanks.

Regards,
Tom Barr
 
Rex Grigg said:
So if one plant produces allelopathic chemicals then they all do?

That's a pretty far stretch.
Click to expand...

And all produce the same intensity of algae control?
What make anyone think that plants cannot harm eachother and not just algae?

Why don't we also see that as well?
Name some plants that do not get along..............

This is speculation with many observational holes/doubts/points that illustrate it's very unlikely.

You can believe what you want, but you are going to have to do a lot of work to prove or show it's significant, many in the past had tried, all have failed.

We also just do not see any evidence for it in our own tanks with our plant species.

The model does not fit the observations at all.
Simple test can be done and show there's no interaction(add activated carbon etc).

Regards,
Tom Barr
 
If you are interested in allelopathy, perhaps another thread might be better.
This is namely a cable thread and allelopathy is seldom addressed in that context, rather in general for the tank.

Allelopathy is suggested as a reason to have cables, but given some of the arguments, like the active ingredients do not need to be at a high dose(time+ concentration), that really is no better than without heating cables if you buy that...............

Regards,
Tom Barr
 
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