Delayed Density-Dependent Season Length Alone Can Lead to Rodent Population Cycles

2006 ◽  
Vol 167 (5) ◽  
pp. 695
Author(s):  
Smith ◽  
White ◽  
Lambin ◽  
Sherratt ◽  
Begon
Keyword(s):  
Population Cycles ◽  
Season Length ◽  
Density Dependent ◽  
Rodent Population

Delayed Density‐Dependent Season Length Alone Can Lead to Rodent Population Cycles

2006 ◽  
Vol 167 (5) ◽  
pp. 695-704 ◽  
Author(s):  
Matthew J. Smith ◽  
Andrew White ◽  
Xavier Lambin ◽  
Jonathan A. Sherratt ◽  
Michael Begon
Keyword(s):  
Population Cycles ◽  
Season Length ◽  
Density Dependent ◽  
Rodent Population

A Reevaluation of Density-Dependent Population Cycles in Open Systems

2000 ◽  
Vol 155 (1) ◽  
pp. 36
Author(s):  
Johnson
Keyword(s):  
Open Systems ◽  
Population Cycles ◽  
Density Dependent

scholarly journals Population cycles and outbreaks of small rodents: ten essential questions we still need to solve

Oecologia ◽  
2020 ◽  
Author(s):  
Harry P. Andreassen ◽  
Janne Sundell ◽  
Fraucke Ecke ◽  
Stefan Halle ◽  
Marko Haapakoski ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Large Amplitude ◽  
Driving Forces ◽  
Population Cycles ◽  
Small Rodent ◽  
Small Rodents ◽  
Rodent Population ◽  
The World ◽  
Essential Questions ◽  
Rodent Populations

AbstractMost small rodent populations in the world have fascinating population dynamics. In the northern hemisphere, voles and lemmings tend to show population cycles with regular fluctuations in numbers. In the southern hemisphere, small rodents tend to have large amplitude outbreaks with less regular intervals. In the light of vast research and debate over almost a century, we here discuss the driving forces of these different rodent population dynamics. We highlight ten questions directly related to the various characteristics of relevant populations and ecosystems that still need to be answered. This overview is not intended as a complete list of questions but rather focuses on the most important issues that are essential for understanding the generality of small rodent population dynamics.

A Reevaluation of Density‐Dependent Population Cycles in Open Systems

2000 ◽  
Vol 155 (1) ◽  
pp. 36-45 ◽  
Author(s):  
Mark Johnson
Keyword(s):  
Open Systems ◽  
Population Cycles ◽  
Density Dependent

scholarly journals Shrub Litter Production in a Sagebrush-Steppe Ecosystem: Rodent Population Cycles as a Regulating Factor

1987 ◽  
Vol 40 (1) ◽  
pp. 50 ◽  
Author(s):  
Robert R. Parmenter ◽  
Mark R. Mesch ◽  
James A. MacMahon
Keyword(s):  
Population Cycles ◽  
Sagebrush Steppe ◽  
Litter Production ◽  
Rodent Population ◽  
Steppe Ecosystem

POPULATION CYCLES OF THE DOUGLAS-FIR TUSSOCK MOTH (LEPIDOPTERA: LYMANTRIIDAE): THE TIME-DELAY HYPOTHESIS

1978 ◽  
Vol 110 (5) ◽  
pp. 513-518 ◽  
Author(s):  
Alan A. Berryman
Keyword(s):  
Time Delay ◽  
Negative Feedback ◽  
Population Model ◽  
Time Delays ◽  
Population Cycles ◽  
Douglas Fir ◽  
Limited Data ◽  
Moth Population ◽  
Density Dependent ◽  
Tussock Moth

AbstractA simple population model is used to test the hypothesis that Douglas-fir tussock moth population cycles are caused by time-delays in the responses of density-dependent (negative feedback) processes. The limited data that are available do not seriously conflict with this hypothesis.

scholarly journals How do variations in seasonality affect population cycles?

2013 ◽  
Vol 280 (1754) ◽  
pp. 20122714 ◽  
Author(s):  
Rachel A. Taylor ◽  
Andrew White ◽  
Jonathan A. Sherratt
Keyword(s):  
Breeding Season ◽  
Bifurcation Analysis ◽  
Latitudinal Gradient ◽  
Population Cycles ◽  
Season Length ◽  
Seasonal Fluctuations ◽  
Predator Prey ◽  
Predator Prey Model ◽  
Generalist Predation

Seasonality is an important component in many population systems, and factors such as latitude, altitude and proximity to the coastline affect the extent of the seasonal fluctuations. In this paper, we ask how changes in seasonal fluctuations impact on the population cycles. We use the Fennoscandian vole system as a case study, focusing on variations in the length of the breeding season. We use a predator–prey model that includes generalist and specialist predation alongside seasonal forcing. Using a combination of bifurcation analysis and direct simulations, we consider the effects of varying both the level of generalist predation and the length of the breeding season; these are the main changes that occur over a latitudinal gradient in Fennoscandia. We predict that varying the breeding season length leads to changes in the period of the multi-year cycles, with a higher period for shorter breeding season lengths. This concurs with the gradient of periodicity found in Fennoscandia. The Fennoscandian vole system is only one of many populations that are affected by geographical and temporal changes in seasonality; thus our results highlight the importance of considering these changes in other population systems.

Age-structured models with density-dependent recruitment

2019 ◽  
pp. 166-193
Author(s):  
Louis W. Botsford ◽  
J. Wilson White ◽  
Alan Hastings
Keyword(s):  
Generation Time ◽  
Egg Production ◽  
Age Distribution ◽  
Population Cycles ◽  
Density Dependent ◽  
Single Sex ◽  
Age Structured ◽  
The Relationship ◽  
The U.S ◽  
Space Competition

This chapter examines age-structured models with density-dependent recruitment. In particular, it focuses on populations with over-compensatory density dependence, such as may occur due to cannibalism or some types of space competition. When the slope (at the equilibrium point) of the relationship between egg production and subsequent recruitment is declining in an over-compensatory way, the population may exhibit unstable limit cycles with period twice the generation time (2T). These cycles occur when that slope is steeply negative and the spawning age distribution has a high mean and low width. These results are applied to study the behavior of cycles in the U.S. west coast Dungeness crab fishery, variability in populations of an intertidal barnacle, and cycles in populations of a pest, the flour beetle. Additionally, it is shown how single-sex harvesting and compensatory growth affect population cycles and equilibria.

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