search for: phytoplankton

...I have the input file necessary to alter parameters and run the model as a text file. To do the optimization I have figured out the general procedure but I need some help on the specific methods and commands that may be helpful. Here is an example of a section of the input file: …. 2.50000 Phytoplankton Maximum Growth Rate Constant @20 øC for Group 1 (1/day)...

Hello, I would like to evaluate the relationship between flows and phytoplankton abundance (or Chlorophyll a concentrations) using a changepoint analysis.? Specifically, I have two study questions: Study Question 1: Are there certain flow thresholds that result in spikes in phytoplankton abundance? Study Question 2: Are the duration of certain flows important for phytoplankton...

Dear gracious R community, I would like to produce charts of phytoplankton biomass changes through time. Each species has a line, and the biomass varies in mirror form along the line for each species along the X time axis. Here is an example of what I'd like to do: http://www.er.uqam.ca/nobel/r30240/Succession.jpg Any suggestions? Thanks David Bird UQAM, Montreal

Hi everyone. I have a long label that I would like to split. I found that I could use "strwrap" for simple text. However, this is not working with this label: str = expression(paste("< 20 ?m phytoplankton ","(cells ? ",mL^-1,")")) plot(...., ylab = strwrap(str,20),...) I suspect this is because I'm using "expression" for form my label. I also tried with \n but this is not working either. Regards, Phil -- View this message in context: http://r.789695.n4.nab...

Hi, I am trying to run a 1D nutrient-phytoplankton-zooplankton model in R using the package 'deSolve'. The code is shown below: DEPTH = seq(2.5, 147.5, 5) NPZ = function(t, state, params){ with(as.list(params), { P <- state[1:NB] Z <- state[(NB + 1): (2*NB)] N <- state[(2*NB + 1): (3*NB)] F.I = function(z, h...

...o I decided to write down a small description. Is it adviseable to publish the link to the article in an R-wiki (which?) so I can give back a little to the community? The article is in german: "Grafikausgabe mit "R" - zwei Beispiele aus der Praxis der ?kologischen Station" (www.phytoplankton.info/download/r-grafik.pdf) -- Richard M?ller . Am Spring 9 . D-58802 Balve www.oeko-sorpe.de

...,nrow(SEData3)),main="Seamounts PCA") rrr <- apply(pca1$scores[,1:2],2, range) par(usr=as.vector(rrr)) points(pca1$scores[,1:2], col=r.cols , pch=20) legend(-8, 2.95, sm, col = r.cols, text.col = "black", lty = NULL, pch = 20,horiz = F,) -- M.J. Sonnekus PhD Candidate (The Phytoplankton of the southern Agulhas Current Large Marine Ecosystem (ACLME)) Department of Botany South Campus Nelson Mandela Metropolitan University PO Box 77000 Port Elizabeth South Africa 6031 Cell: 082 080 9638 E-mail: tsonnekus@gmail.com [[alternative HTML version deleted]]

....8637500 5 Surface 0.1693333 2.7083333 2.7858333 I would like to maintain the order surface, shallow, deep, fmax and below. *Or *if there is a way I can rearrange the yaxis in the order surface, shallow, deep, fmax and below. Any suggestions? Thank you Tinus -- M.J. Sonnekus PhD Candidate (The Phytoplankton of the southern Agulhas Current Large Marine Ecosystem (ACLME)) Department of Botany South Campus Nelson Mandela Metropolitan University PO Box 77000 Port Elizabeth South Africa 6031 Cell: 082 080 9638 E-mail: tsonnekus@gmail.com [[alternative HTML version deleted]]

...also like to fill the contours in grayscale/colour (e.g. levels 0, 20, 40, 60, 80. 100 %) and add a legend to the graph. As of yet I haven't tried to figure out how to add the stations as a secondary axis to the plot. Thanks for the help and advice. Tinus -- M.J. Sonnekus PhD Candidate (The Phytoplankton of the southern Agulhas Current Large Marine Ecosystem (ACLME)) Department of Botany South Campus Nelson Mandela Metropolitan University PO Box 77000 Port Elizabeth South Africa 6031 Cell: 082 080 9638 E-mail: tsonnekus@gmail.com [[alternative HTML version deleted]]

...uber das bereits Vorhandene# gezeichnet contour(sorpe.li, # Isohypsen werden eingezeichnet add = TRUE) points(sorpe, # Die urspr?unglichen Messpunkte werden pch = 1) # eingezeichnet, und zwar als Kreise -- Richard M?ller . Am Spring 9 . D-58802 Balve http://www.oeko-sorpe.de - http://www.phytoplankton.info - http://independent.academia.edu/Richard