## 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. |

### From inside the book

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Page 64

Abundance:

64 3.1.1 Wiegerfs Method 68 3.1.2 Hendricks' Method 68 3.2 Statistical

Distributions 72 3.2.1 Poisson Distribution 73 3.2.2 Negative Binomial

Distribution 81 3.3 ...

Abundance:

**Quadrat**.**Counts**. and. Line. Transects. 3. 1**Quadrat**Size and Shape64 3.1.1 Wiegerfs Method 68 3.1.2 Hendricks' Method 68 3.2 Statistical

Distributions 72 3.2.1 Poisson Distribution 73 3.2.2 Negative Binomial

Distribution 81 3.3 ...

Page 93

Many other statistical frequency distributions have been used to describe

should refer to the more specialized literature if you need to consider other ...

Many other statistical frequency distributions have been used to describe

**quadrat****counts**of plants and animals (Evans, 1953; Patil et al., 1971b; Elliott, 1977). Youshould refer to the more specialized literature if you need to consider other ...

Page 121

3.5 SUMMARY One way to estimate density is to count the number of individuals

in a series of quadrats. ... More often, animals and plants are aggregated or

clumped in space, and the variance of

3.5 SUMMARY One way to estimate density is to count the number of individuals

in a series of quadrats. ... More often, animals and plants are aggregated or

clumped in space, and the variance of

**quadrat counts**exceeds the mean count.### 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