746 reputation
214
bio website openwetware.org/wiki/…
location Urbana, IL
age
visits member for 2 years, 8 months
seen Aug 26 at 3:24

Jun
7
comment What are the ecological effects of moderately high and prolonged concentrations of nitrogen deposition on an ecosystem?
Would help to define magnitudes. Prolonged = decades? Moderately high = 5g/m2/y?
Nov
18
comment Definitions and examples of some math-releated ecology branches
"Numerical Ecology" is the title of a classic text by Legendre and Legendre, with a recent variation applied to R; but it is not clear how the field is different
Jun
21
comment Change in conditions of an ecosystem lead to change in organisms
The question is not answerable unless you define "bad"
Jun
6
comment Relationship between biomass and net primary productivity
What model are you using to predict NPP? What other variables does it predict? How frequent are the biomass measures? does it predict above and belowground NPP separately? You can only compare apples to apples.
Jun
6
comment What are ways to compare the “costs” and “gains” of food production systems?
This is called "Life cycle analysis"
Mar
6
comment What controls leaf senescence in deciduous tree species, and how can I predict it?
there was a related question on stats.SE (about modeling bud burst) stats.stackexchange.com/q/9797/1381
Sep
30
comment Are there any substance that are more dangerous at low dose than at higher dose?
thanks for the clarification; as written it can be interpreted as "homeopathy" doesn't work, except when it does. On another note (more as a clarification for readers than as a correction to you) the GMO study is a poor example to use. Because of the many flaws, any inference is limited (e.g. my primary conclusion is that there is insufficient information to conclude anything about the relationship dose-response relationship).
Sep
30
comment Are there any substance that are more dangerous at low dose than at higher dose?
Example of something always reactive no matter the dose?
Sep
30
comment Are there any substance that are more dangerous at low dose than at higher dose?
sugar, water, protein, ... these all have an optimal range of healthy doses- too much OR too little can be harmful.
Aug
21
comment List of species recently found of economic value
Perhaps the Biofuel Ecophysiological Traits and Yields Database would be of some help?
Aug
1
comment What is the effect of a pure-oxygen environment on a plant?
If the plant is potted, thre could be co2 from the soil, as well as from plant respiration. But at such high o2, photosynthesis would be inefficient.
Jul
9
comment How deep in the soil can a seed be placed and still develop into a plant/tree?
there is no single mathematical relationship, but I have tried to provide a general answer please let @richard or I know if you have further questions
Jul
5
comment How deep in the soil can a seed be placed and still develop into a plant/tree?
@RichardSmith Thanks for looking it over. I just wanted to make sure I didn't miss anything obvious.
Jul
5
comment How deep in the soil can a seed be placed and still develop into a plant/tree?
nice answer. I'd appreciate your opinion of mine.
Jul
5
comment How deep in the soil can a seed be placed and still develop into a plant/tree?
TL;DR 1) yes, 2) depends on species, soil, climate, 3) yes
Jul
2
comment Is Homo sapiens the only species capable of prioritization?
Animal behavior is not my field but I think the answer is "no, animal feeding / foraging shows optimization of the cost / benefits of finding and capturing different foods / prey", an ecological 'paradigm' as explained here notes.utk.edu/bio/greenberg.nsf/…
Jun
27
comment Do all plants photosynthesize with equal efficiency?
Yep, you are correct, I read a good bit of the article, but when it came to writing down the numbers I just grabbed them from the Abstract where they are called "maximum conversion efficiency of solar energy to biomass", in the text they explain that this is the theoretical max. The numbers you give are short term max reported values (for the record, the C3 value is 3.5%, second line of p 157). I changed your answer.
Jun
27
comment Do all plants photosynthesize with equal efficiency?
Zhu et al, 2008 provide a review titled "What is the maximum ef´Čüciency with which photosynthesis can convert solar energy into biomass?" in the Journal Current Opinion in Biotechnology.
Jun
27
comment Do all plants photosynthesize with equal efficiency?
According to Zhu et al,, 2008 the maximum observed conversion of photosynthetic energy to biomass is 6% at 30C. I am not sure why there is a discrepancy, but Wikipedia has no citation nor reference temperature and Zhu et al do not consider CAM plants or algae.
Jun
24
comment What's the state of the art in designing and creating your own life forms?
@nico huh? E. coli can be considered free, and media is about $20/kg dry (e.g. malt extract)