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visits member for 2 years, 4 months
seen Nov 21 '13 at 7:13

Nov
19
comment If I built a concrete pool, would it ever contain fish?
@goodgravy algae don't thrive on organic matter, they thrive on mineral nutrients, N and P in particular. Ca is important but rarely limiting.
Nov
19
comment If I built a concrete pool, would it ever contain fish?
It wasn't so much that you used Wikipedia as a source, it's that you copy and pasted and only made trivial changes - better to just quote the relevant passage.
Nov
18
comment Does preservation in ethanol alter leaf litter mass?
This paper implies the EtOH extractable fraction in willow leaf litter is small ~2% download.springer.com/static/pdf/61/… but this will vary by species (eg pine tar). Again, this effect can be measured on samples similar to yours.
Nov
18
comment Does preservation in ethanol alter leaf litter mass?
This sounds like something that would be straightforward to test empirically. As a bonus, any effect of EtOH on your samples (bias) could (possibly) be quantified and accounted for, especially if the effect is small. The questions you are asking will inform how best to do this. But I do suspect EtOH might dissolve some hydrophobic compounds in the coarse fraction. Maybe try evaporating it first and adding water. Not ideal, but likely more informative than throwing samples out!
Nov
18
comment Does preservation in ethanol alter leaf litter mass?
How do you plan to separate the POM from the rest of the sample?
Nov
18
comment If I built a concrete pool, would it ever contain fish?
The term "Bloom" implies a transient state, red tide is a saltwater phenomenon and some of the prose is directly copied from Wikipedia!
Nov
18
comment If I built a concrete pool, would it ever contain fish?
@goodgravy your scenario requires a healthy dose of nutrients
Nov
18
comment Shortest route for a Nitrogen atom from fossil fuel to a protein in your body?
Fossil fuel -combustion-> NOx -deposition-> plant -> person
Nov
18
comment Energy flow in an ecosystem
What makes you think there are mistakes?
Jun
10
comment Measuring sugar content of a tree
@AlanBoyd Moorhead and Sinsabaugh 2006 "Theoretical Model of Litter Decay and Microbial Interaction" gives a good summary (see Part 2: Lignin x cellulose controls).
Jun
9
comment Measuring sugar content of a tree
@alan even if lignin degraders breakdown lignin and can utilize some of the products, I don't think the lignin itself results in a net benefit to the fungus (because ligninases are so costly to build) it is the cellulose inside the lignin matrix that they are after.
Jun
6
comment Measuring sugar content of a tree
The soluble carbohydrate can get the mushrooms off to a good start, but it is the cellulose that will be most important for production. Another reason people innoculate logs in winter is because there are fewer spores from competitors in the air, and less work to be done in the field (for farmers).
Apr
5
asked What controls the southern range of willows?
Mar
19
asked Is there a standard definition for plant “maturity”?
Mar
7
comment Fibonacci sequence in nature, truth or just wishful thinking?
The pattern forming processes generate a fibonnachi pattern, but there are other processes that occur as well.
Mar
7
comment How is instinctual information encoded?
+1 sound good, do you have any primary references?
Mar
5
revised What controls leaf senescence in deciduous tree species, and how can I predict it?
added 136 characters in body
Mar
5
asked What controls leaf senescence in deciduous tree species, and how can I predict it?
Dec
17
awarded  Yearling
Sep
21
awarded  Custodian