Red Squirrel Population Dynamics. II. Settlement Patterns and the Response to Removals

10.2307/5426 ◽  
1991 ◽  
Vol 60 (3) ◽  
pp. 979 ◽  
Author(s):  
Walt Klenner
Keyword(s):  
Population Dynamics ◽  
Settlement Patterns ◽  
Red Squirrel

scholarly journals Migration and Settlement in Bulgaria

1978 ◽  
Vol 10 (5) ◽  
pp. 593-617 ◽  
Author(s):  
D Philipov
Keyword(s):  
Population Dynamics ◽  
Comparative Study ◽  
Internal Migration ◽  
Settlement Patterns ◽  
Population Policy ◽  
Demographic Analysis ◽  
National Population ◽  
Spatial Population ◽  
Spatial Population Dynamics

This paper examines the recent evolution of Bulgaria's population. It is part of IIASA's comparative study of migration and settlement patterns in its member nations. The paper presents a multiregional demographic analysis of fertility, mortality, and internal migration for a seven-region disaggregation of the Bulgarian state. The results give a detailed view of current spatial population dynamics in the country and offer valuable insights useful for the improvement of national population policy.

On the existence, uniqueness and computational analysis of a fractional order spatial model for the squirrel population dynamics under the Atangana-Baleanu-Caputo operator

2021 ◽  
Vol 8 (3) ◽  
pp. 432-443
Author(s):  
O. M. Ogunmiloro ◽  
◽  
S. E. Fadugba ◽  
E. O. Titiloye ◽  
◽  
...  
Keyword(s):  
Population Dynamics ◽  
Fractional Order ◽  
Spatial Model ◽  
Computational Cost ◽  
Red Squirrel ◽  
Transform Method ◽  
Red Squirrels ◽  
Order Analysis ◽  
Differential Transform ◽  
Low Computational Cost

In this paper, we examine the fractional order analysis of a diffusion competition spatial model describing the interactions between the externally introduced grey and local red squirrel under the Atangana-Baleanu-Caputo (ABC) sense. Also, we establish the existence and uniqueness analysis of the fractional order spatial model of the squirrel population dynamics, while the numerical computation of the fractional order spatial model is carried out using the two dimensional Fractional Order Differential Transform Method (FODTM). Simulations of the variables of the model reveal that as the system evolves, the grey squirrels increase in density with increase in time, while the red squirrels decrease in density with increase in time. Also the simulations show that the FODTM is efficient and convergent with low computational cost.

scholarly journals European red squirrel population dynamics driven by squirrelpox at a gray squirrel invasion interface

2014 ◽  
Vol 4 (19) ◽  
pp. 3788-3799 ◽  
Author(s):  
Julian Chantrey ◽  
Timothy D. Dale ◽  
Jonathan M. Read ◽  
Steve White ◽  
Fiona Whitfield ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Gray Squirrel ◽  
Red Squirrel

scholarly journals Population Dynamics in Southern Europe: A Local-Scale Analysis, 1961–2011

2018 ◽  
Vol 11 (1) ◽  
pp. 109 ◽  
Author(s):  
Ilaria Zambon ◽  
Kostas Rontos ◽  
Pere Serra ◽  
Andrea Colantoni ◽  
Luca Salvati
Keyword(s):  
Population Dynamics ◽  
Settlement Patterns ◽  
Population Distribution ◽  
Regional Scale ◽  
Local Scale ◽  
Spatially Explicit ◽  
Southern Europe ◽  
Scale Analysis ◽  
Demographic Trends ◽  
Explicit Analysis

Different socioeconomic, historical, political, and cultural factors have influenced long-term settlement patterns and demographic structures in Europe. Southern Europe is considered a relatively homogeneous region as far as settlement characteristics and population dynamics are concerned. Within-country local variability in the spatial distribution of population is high, and inherent differences across countries may outline distinct demographic patterns at regional scale. A comparative, local-scale analysis of population distribution in five countries (Spain, Italy, Croatia, Greece, and Cyprus) over a relatively long time period (1961–2011) contributes to identify latent demographic trends in Mediterranean Europe at the spatial scale of Local Administrative Units (LAU). A spatially-explicit analysis of basic indicators of population density and demographic change allows identification of territorial disparities, reflecting local-scale settlement patterns common to different countries (e.g., population growth along coastal districts). These patterns consolidate a metropolitan hierarchy centered on large—mainly compact—cities and more dispersed conurbations along coastal areas. At the same time, the examined countries present different territorial contexts resulting in distinct population dynamics in turn influenced by internal (e.g., national policies, culture and local identity, class segregation) and exogenous (e.g., economic cycle, urbanization models) factors. A spatially-explicit analysis of demographic trends at local scale may contribute to rethinking urban strategies and adapting spatial planning to heterogeneous socioeconomic contexts across Europe.

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