[R-sig-eco] StreamMetabolism 0.03 Released

[stephen sefick]

StreamMetabolism 0.03 was uploaded onto CRAN this evening and should
be available soon.  Function sunrise.set has been added which is
highly reliant on map tools sunriset function.  This function makes it
easy to create a sequence of sunrise sunset times.
EcosystemProduction.20 has been added to account for temperature's
effect on respiration (reaction rate doubling for every 10 deg. C).
The correction is preformed in the daytime and not during the night.
The rational here is that the average nighttime rate is an actual
average (assuming that only respiration is acting at night).   During
the day the actual respiration rate can not be measured, but the
effect of temperature on chemical reaction rate is known and the
following equation is used.

ERt = ERa*(1.072^(T-Ta))
ERt = Ecosystem Respiration @ Temp
ERa = Average Nighttime Respiration
T =  Temperature @ which to predict ER
Ta = Average Nighttime Temperature

As always comments, questions, and suggestions are welcome.
regards,


-- 
Stephen Sefick

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.  We are mammals, and have not exhausted the
annoying little problems of being mammals.

								-K. Mullis