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bio website openwetware.org/wiki/…
location Urbana, IL
age
visits member for 2 years, 7 months
seen Jun 28 at 20:20

Jul
5
revised How deep in the soil can a seed be placed and still develop into a plant/tree?
deleted 1 characters in body
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
revised How deep in the soil can a seed be placed and still develop into a plant/tree?
added 91 characters in body
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
answered How deep in the soil can a seed be placed and still develop into a plant/tree?
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
28
revised Do all plants photosynthesize with equal efficiency?
added reference values from Zhu et al 2008
Jun
27
suggested suggested edit on Do all plants photosynthesize with equal efficiency?
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)
Jun
23
comment Do all plants photosynthesize with equal efficiency?
Define efficiency: carbon fixed per unit of what [h2o, nitrogen, light, CO2]? Any way you look at it, the answer will be "no".
Jun
23
comment Why hasn't mother nature made us aware of our lizard brain?
-1 mother nature does not evolve us. That is a religious rather than a scientific view
Jun
21
comment How high is the energy yield of photovoltaics compared to photosynthesis?
I don't think either could meet domestic energy requirements alone, at least not in the near future. Your question could be improved with better definitions; it still says "converting", without saying to what. See, for example, quantum efficiency and quantum yield.
Jun
21
comment How high is the energy yield of photovoltaics compared to photosynthesis?
Does energy used to evaporate water count? Or the energy required to physically transport water from the soil to the air? PV cells don't evaporate or transport water. These are not accounted for in standard measures of quantum efficiency.
Jun
21
comment How high is the energy yield of photovoltaics compared to photosynthesis?
Your question could use some clarification. As stated, the premise is wrong because neither leaves nor PV cells produce energy. They can capture or store energy, they can also reflect or absorb and release energy. What pools or fluxes of energy are you interested in comparing? a common comparison is "quantum efficiency", but it is not clear if this is the comparison that you are looking for.
Jun
19
comment What would be the best dredging/trawling tools to collect macrofaunal priapulids?
The Ecology listserve (ECOLOG-L@listserv.umd.edu) would be a good bet to find expert responses to such a question; it would be useful to reference this question if you were to post there.
Jun
18
accepted (How) does coppicing fundamentally alter tree growth?