Zoogrowth: a zooplankton growth dataset

In marelacTeaching: Datasets and tutorials for use in aquatic sciences

Description

This literature dataset, compiled by Hansen et al. (1997) contains 84 measurements of maximal growth rates as a function of organism volume and temperature for various species of zooplankton. The maximal growth rates were obtained from laboratory experiments.

It is used in the book to demonstrate how one can obtain order-of-magnitude estimates of model parameters (i.c. maximal growth) via allometric relations, i.e. by performing log-log regression of organism rates versus size.

Usage

Zoogrowth

Format

a dataframe with 84 rows, and with following columns:

Volume

the volume in [um 3].

Mumax

the maximal growht rate, [/hour].

Species

the name of reared zooplankton species.

Temp

the rearing temperature, [dg C].

Group

the systematic group to which the organism belongs, one of Nanoflagellate, Dinoflagellate, Ciliate, Rotifer, Meroplankton, Copepod.

Author(s)

Karline Soetaert <[e-mail]>

References

Hansen PJ, Bjornsen PK, Hansen BW, 1997. Zooplankton grazing and growth: Scaling within the 2-2,000-mu m body size range. Limnology and Oceanograpy 42: 687-704.

See Also

SCOC, a dataset containing sediment community oxygen consumption rates

See the paper of Hansen et al. 1997 for a description of the original literature sources of this dataset.

Examples

plot(Zoogrowth$Volume,Zoogrowth$Mumax,log="xy",
      xlab="zooplankton volume, micrometer ^ 3",
      ylab="maximal growth rate, /hr",main="Zoogrowth",cex=2,
      pch=(15:20)[Zoogrowth$Group],col=(1:6)[Zoogrowth$Group])
legend("topright",legend=levels(Zoogrowth$Group),col=1:6,pch=15:20)

ll <- lm(log(Zoogrowth[,2])~ log(Zoogrowth[,1]))
rr <- summary(ll)$r.squared
A  <- exp(coef(ll)[1])
B  <- (coef(ll)[2])
curve(A*x^B,add=TRUE,lwd=2)
AA <- round(A*100)/100
BB <- round(B*100)/100
expr <- substitute(y==A*x^B,list(A=AA,B=BB))
text(100,.0035,expr,adj=0)
expr2 <- substitute(r^2==rr,list(rr=round(rr*100)/100))
text(100,0.002,expr2, adj=0)

marelacTeaching documentation built on May 2, 2019, 6:43 p.m.