Quote:
Originally Posted by malcolmf
This is out of date now, having been based on a large one-off expeirmental increase in CO2. More realistic gradual increases do not have a significant effect. (Klironomos et al (2005) Nature 433(7026) pp.621-4)
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I read a New Zealand study where levels of Mycorrhizae were elevated greatly along a geological fault in the soil that was spewing out CO2 gas. I don't think I can find it again but will look.
They also quoted a number of other studies where CO2 dissolved in water promoted soil Mycorrhizae growth greatly.
It seems the soil likes soda too
PS (a little later)
Can't find NZ article but these Google hits seem to run counter to what you say.
(I find it a sad reflection on scientific inquiry when fashion is quoted as a reason for not believing some bit of science or other.
To be a fashionable scientist one needs to believe in the 'newest' not the old "out-of-date' stuff.)
Quote:
CO2 Science CO2 Science
Yet augmented soil carbon sequestration is but the beginning of benefits that can be expected to be provided by CO2-enhanced AMF growth and glomalin ...
Quote:
The amount of fungal-produced glomalin in the soils of the CO2-enriched treatments in all three of the ecosystems they studied was greater than that observed in the soils of corresponding ambient CO2 treatments
. . .
to have soil glomalin concentrations increase by fully 5-fold as a consequence of less than a doubling of the air's CO2 content is a truly mind-boggling benefit.
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CO2 Science - 23k - Cached - Similar pages
Blackwell Synergy - Ecol Letters, Volume 3 Issue 6 Page 475 ...
Soil concentrations of glomalin are very highly correlated with soil ... between plant growth and soil nutrient cycling under elevated CO2: a meta-analysis. ...
Blackwell Synergy - Ecol Letters, Volume 3 Issue 6 Page 475 - November 2000 (Article Abstract) - Similar pages
AGNET AUGUST 12, 1999 >From the editor Rooting for acid U.S. warns ...
Total glomalin and immunoreactive glomalin concentrations in soil increased in both grasslands with elevated CO2 (Table 1). Glomalin concentration in ...
http://www.foodcontamination.ca/agne...8-12-99-01.txt - 39k - Cached - Similar pages
Redwood Reader
Much of the glomalin stored in the soil has been released to the atmosphere ... Experiments with raised CO2 show rapid growth of trees and even faster rates ...
redwoodreader.blogspot.com/2005_01_01_redwoodreader_archive.html - 108k - Cached - Similar pages
Redwood Reader
I have been advocating for a high level study to read these few USDA reports and check out the advantages of increased CO2 on plant growth and glomalin ...
redwoodreader.blogspot.com/2005_05_01_redwoodreader_archive.html - 90k - Cached - Similar pages
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Found it
mentioned in first article a spring sorry
Quote:
In a subsequent study conducted in New Zealand, Rillig et al. (2000) examined several characteristics of AMF associated with the roots of plants that had been growing for at least 20 years along a natural CO2 gradient near a CO2-emmitting spring.
They found that the elevated CO2 significantly increased percent root colonization by AMF in a linear fashion - and by nearly 4-fold! - in going from 370 to 670 ppm.
In addition, fungal hyphal length experienced a linear increase of over 3-fold along the same CO2 gradient, while total soil glomalin experienced a linear increase of approximately 5-fold.
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No there was a NZ vent (lots of them in NZ very smelly place in parts.)
My memory did not fail me
Quote:
These observations lead one to wonder if CO2-induced increases in soil-stabilizing fungal activities might lead to increases in soil carbon sequestration.
[B] A potential answer comes from another study conducted near a natural CO2 vent in New Zealand, where Ross et al. (2000) measured soil carbon (C) and nitrogen (N) contents in areas exposed to atmospheric CO2 concentrations on the order of 440 to 460 ppm and other areas exposed to concentrations on [/B]the order of 510 to 900 ppm
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