charles matthews
New member
Eric,
Regarding the study on phytoplankton and carbon uptake in dendros, the conclusion- that additional components of the seston were needed for carbon needs- wasn't supported by the information cited.
I understood from the article that about a third of the 24 hour carbon needs were assimulated within the first hour; thereafter, about 3% or so per hour for the next eight hours. If one assumes that the 3% rate persisted over 23 hours, then the full carbon budget could be met by phytoplankton, or very close to it- a conclusion identical to that of Katrina Fabricius.
I don't understand how this result could indicate that something other than phytopoankton is needed.
Additionally, I don't draw from this the conclusion that the aquarist should "pulse" phytoplankton? It does appear that each additional hour after the first contributes significantly in total over 24 hours.
I am wondering also how this study relates to the observed inflation/deflation behavior of dendros. Is it possible that continuous provision of phyto during the deflation periods are necessary to provide that last 60% of the carbon budget? Were they assimulating 3%/hr when deflated?
If you have anything on these questions I would appreciate it very much.
Charles
Regarding the study on phytoplankton and carbon uptake in dendros, the conclusion- that additional components of the seston were needed for carbon needs- wasn't supported by the information cited.
I understood from the article that about a third of the 24 hour carbon needs were assimulated within the first hour; thereafter, about 3% or so per hour for the next eight hours. If one assumes that the 3% rate persisted over 23 hours, then the full carbon budget could be met by phytoplankton, or very close to it- a conclusion identical to that of Katrina Fabricius.
I don't understand how this result could indicate that something other than phytopoankton is needed.
Additionally, I don't draw from this the conclusion that the aquarist should "pulse" phytoplankton? It does appear that each additional hour after the first contributes significantly in total over 24 hours.
I am wondering also how this study relates to the observed inflation/deflation behavior of dendros. Is it possible that continuous provision of phyto during the deflation periods are necessary to provide that last 60% of the carbon budget? Were they assimulating 3%/hr when deflated?
If you have anything on these questions I would appreciate it very much.
Charles