## Ecological MethodologyEcological Methodology, Second Edition provides a balance of material on animal and plant populations, and teaches students of ecology how to design efficient tests in order to obtain maximum precision with minimal work. |

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Page 372

Niche breadth can be measured by observing the distribution of individual

organisms within a set of

to the rows and

Colwell ...

Niche breadth can be measured by observing the distribution of individual

organisms within a set of

**resource**states. The table formed by assigning speciesto the rows and

**resource**states to the columns is called the**resource**matrix (Colwell ...

Page 374

in only one

This can be done easily for Levins' measure by dividing B by the total number of

in only one

**resource**state (minimum niche breadth, maximum specialization). ...This can be done easily for Levins' measure by dividing B by the total number of

**resource**states after correcting for a finite number of**resources**. Hurlbert (1978) ...Page 386

2 log 2 where R0 = Horn's index of overlap for species j and k pij = Proportion

is of the total

2 log 2 where R0 = Horn's index of overlap for species j and k pij = Proportion

**resource**i is of the total**resources**utilized by species j pik = Proportion**resource**iis of the total

**resources**utilized by species k and any base of logarithms may be ...### What people are saying - Write a review

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### Other editions - View all

Ecological Methodology Charles J. Krebs,CHARLES L. KREBS,Professor of Zoology Charles J Krebs No preview available - 1999 |

### Common terms and phrases

abundance aerial analysis aphids Appendix assumptions bias calculations capture Caughley Chapter clumped coefficient of variation confidence interval confidence limits defined density estimate distance ecological ecologists END-OF-FILE equal catchability equation estimate of population estimate population example Figure finite population FORMAT 2X,'ENTER formula frequency distribution index of dispersion level of precision line transect mark-recapture marked animals Morisita nearest neighbor negative binomial distribution niche breadth niche overlap normal distribution null hypothesis Number of animals Number of individuals number of quadrats number of samples number of species observed obtained parameters Petersen plot Poisson distribution population density population estimate probability problem Program proportion quadrat counts random points random sampling ratio READ regression resource sample size sample sizes sampling unit Seber second sample sequential sampling simple random sampling spatial pattern standard error statistical statistical population stratum study area survival rate Table techniques Total number transformation unmarked variable variance voles