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Demographic and environmental stochasticity

Russell Lande, Steinar Engen, and Bernt-Erik SÆther

in Stochastic Population Dynamics in Ecology and Conservation

Published in print:
2003
Published Online:
April 2010
ISBN:
9780198525257
eISBN:
9780191584930
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198525257.003.0001
Subject:
Biology, Ecology

This chapter defines and formulates demographic and environmental stochasticity, and illustrates statistical methods for estimating them from field data. Population fluctuations in most species are ... More


Age structure

Russell Lande, Steinar Engen, and Bernt-Erik SÆther

in Stochastic Population Dynamics in Ecology and Conservation

Published in print:
2003
Published Online:
April 2010
ISBN:
9780198525257
eISBN:
9780191584930
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198525257.003.0003
Subject:
Biology, Ecology

The total density dependence in a life history is defined as the negative elasticity of population growth rate per generation with respect to population density. This chapter analyzes a ... More


Amphibian Population Cycles and Long-Term Data Sets

Howard H Whiteman and Scott A Wissinger

in Amphibian Declines: The Conservation Status of United States Species

Published in print:
2005
Published Online:
March 2012
ISBN:
9780520235922
eISBN:
9780520929432
Item type:
chapter
Publisher:
University of California Press
DOI:
10.1525/california/9780520235922.003.0025
Subject:
Biology, Animal Biology

Although most researchers agree that many amphibian populations are declining, there is debate about how to distinguish human-induced declines from natural population fluctuations. As with many ... More


Population Fluctuations in Rodents

Charles J. Krebs

Published in print:
2013
Published Online:
September 2013
ISBN:
9780226010359
eISBN:
9780226010496
Item type:
book
Publisher:
University of Chicago Press
DOI:
10.7208/chicago/9780226010496.001.0001
Subject:
Biology, Ecology

How did rodent outbreaks in Germany help to end World War I? What caused the destructive outbreak of rodents in Oregon and California in the late 1950s, the large population outbreak of lemmings in ... More


New Zealand: Changing Tides in the South Pacific: Immigration to Aotearoa New Zealand

Richard D. Bedford and Jacques Poot

in Immigration Worldwide: Policies, Practices, and Trends

Published in print:
2009
Published Online:
February 2010
ISBN:
9780195388138
eISBN:
9780199863440
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195388138.003.0017
Subject:
Social Work, Social Policy, Communities and Organizations

New Zealand, or Aotearoa as these antipodean islands are called in the indigenous Maori language, is a country of both extensive immigration and emigration. This chapter addresses the considerable ... More


Self-Regulation Hypotheses for Fluctuations

Charles J. Krebs

in Population Fluctuations in Rodents

Published in print:
2013
Published Online:
September 2013
ISBN:
9780226010359
eISBN:
9780226010496
Item type:
chapter
Publisher:
University of Chicago Press
DOI:
10.7208/chicago/9780226010496.003.0011
Subject:
Biology, Ecology

Self-regulation hypotheses suggest that interactions between individuals in a population cause demographic changes which produce population fluctuations. Two types of self-regulation mechanisms cause ... More


Multifactor Explanations of Fluctuations

Charles J. Krebs

in Population Fluctuations in Rodents

Published in print:
2013
Published Online:
September 2013
ISBN:
9780226010359
eISBN:
9780226010496
Item type:
chapter
Publisher:
University of Chicago Press
DOI:
10.7208/chicago/9780226010496.003.0012
Subject:
Biology, Ecology

This chapter discusses multiple factor explanations for population fluctuations in rodents. The following multiple-factor hypotheses are considered: (1) many factors affect population changes; (2) ... More


How Can We Determine What Drives Population Changes?

Charles J. Krebs

in Population Fluctuations in Rodents

Published in print:
2013
Published Online:
September 2013
ISBN:
9780226010359
eISBN:
9780226010496
Item type:
chapter
Publisher:
University of Chicago Press
DOI:
10.7208/chicago/9780226010496.003.0007
Subject:
Biology, Ecology

This chapter, which investigates the variables that determine the rate of population change in any species, suggests that food supply and predation are the two critical factors affecting population ... More


Disease as a Potential Factor in Population Changes

Charles J. Krebs

in Population Fluctuations in Rodents

Published in print:
2013
Published Online:
September 2013
ISBN:
9780226010359
eISBN:
9780226010496
Item type:
chapter
Publisher:
University of Chicago Press
DOI:
10.7208/chicago/9780226010496.003.0010
Subject:
Biology, Ecology

This chapter discusses diseases as the most likely cause for rodent population fluctuations. It first describes a study carried out on vole tuberculosis and population fluctuations, and then ... More


Key Studies Yet to Be Done

Charles J. Krebs

in Population Fluctuations in Rodents

Published in print:
2013
Published Online:
September 2013
ISBN:
9780226010359
eISBN:
9780226010496
Item type:
chapter
Publisher:
University of Chicago Press
DOI:
10.7208/chicago/9780226010496.003.0014
Subject:
Biology, Ecology

This chapter presents a list of desirable studies that need to be done to resolve outstanding issues about rodent population fluctuations, and suggests further studies on demographics, food, ... More


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