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seen Sep 4 '14 at 1:59

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
Sep
5
comment What is the Edward O. Wilson fuss about?
How is the fact that group selection does not hold in theory reconcile with observations / experimental tests? Is there another explanation for inherited religious, social, or political groups?
Sep
5
comment What is the Edward O. Wilson fuss about?
I started reading David Sloan Wilson's work on group selection a decade ago and am surprised that the field still has such a reluctance to move on.
Sep
5
comment From which ancestor species did humans inherit orgasm?
-1 using the term "Invented" makes this question nonsensical.
Jun
26
accepted Can I estimate leaf temperature from air temperature? What other information would be required?
Jun
19
comment Can I estimate leaf temperature from air temperature? What other information would be required?
@nico perhaps because the error of measurement is >= than the error introduced by this assumption (e.g. if the delta-T is ~1-2C the error might be on the order of 10%). If there is a reference, I haven't seen it cited, and this assumption is made ~ 10% of the time - usually in older papers before thermocouples on the leaf surface at the time of measurement were integrated into standard equipment.
Jun
19
comment Features in individuals causing high population variation
The term "striving" and the phrase "the individual should strive" raise concerns like those in the comment by @DQdlM. I would suggest re-phrasing the question.
Jun
14
asked Can I estimate leaf temperature from air temperature? What other information would be required?
Jun
13
accepted What are the units of Q10 (temperature sensitivity)?
Jun
12
awarded  Commentator
Jun
12
comment Compare and contrast “Rubisco activity” and “assimilation rate” (is there a difference, and if so, what is it)?
more or less in general. It seems like a less direct measure (since the sugar pool presumably has losses to respiration as well as inputs from assimilation). It also seems more difficult in general, although perhaps less expensive.
Jun
12
comment What are the units of Q10 (temperature sensitivity)?
how do you calculate k, are the curves in the figure something like e^{-kt}?
Jun
12
reviewed Approve What are the units of Q10 (temperature sensitivity)?
Jun
12
asked What are the units of Q10 (temperature sensitivity)?
Jun
12
awarded  Scholar
Jun
12
accepted Compare and contrast “Rubisco activity” and “assimilation rate” (is there a difference, and if so, what is it)?
Jun
12
comment Compare and contrast “Rubisco activity” and “assimilation rate” (is there a difference, and if so, what is it)?
This is a useful answer, and it does answer my question. However, I was not familiar with measuring assimilation using 14C-CO2. Almost every leaf-level measurement I have found in the literature has been measured with a LI-6400, which measures exchange of [CO2] and [H2O] between the leaf and atmosphere. In what cases is 14C used?