This model aims to analyze how conservation from 2013 to 2017 needs improving in order to meet the needs to repopulate the Florida panther based on Acreage of conservation. Human population and housing development challenge conservation efforts, this model produces scenarios that test policy efforts in repopulate the Florida Panther. Our goal is to conserve 16 million acres for a habitat with 500 panthers.

Biodiversity Housing Population Florida

Simple model for Nature.

Population

WIP integrating Epidemiology Systems Science and Policy making, mainly based on books and AJE articles by Keyes and Galea

Health Care Policy Population Systems Science Data Science Epidemiology

Adapted from Hartmut Bossel's "System Zoo 3 Simulation Models, Economy, Society, Development."

​Population model where the population is summarized in four age groups (children, parents, older people, old people). Used as a base population model for dealing with issues such as employment, care for the elderly, pensions dynamics, etc.

System Zoo Z602 Population Society Economics

This is a basic population estimator. Default values approximate recent data for the Czech Republic (Czechia).

Population Demographics

tester

Population

first attempt at an Insight model

Population Simple

This model incorporates several options in examining fisheries dynamics and fisheries employment. The two most important aspects are the choice between I)managing based on setting fixed quota versus setting fixed effort , and ii) using the 'scientific advice' for quota setting  versus allowing 'political influence' on quota setting (the assumption here is that you have good estimates of recruitment and stock assessments that form the basis of 'scientific advice' and then 'political influnce' that desires increased quota beyond the scientific advice).

Fishery Management Population Sustainability

This simulation examines the linkages between cultural, material, spatial demographic, and hierarchical dynamics.

Population Energy Urban

Small community that becomes overpopulated requires change in order to survive

Population Environment Carrying Capacity Sustainability

Een dynamisch model over een prooi predator relatie tussen verschillende populaties onder invloed van abiotische factoren.

Prey Predator Abiotic Factors Dynamic Model Biology Population

Births Population Postive Feedback Loop

Een dynamisch model over een prooi predator relatie tussen verschillende populaties onder invloed van abiotische factoren.

Prey Predator Abiotic Factors Dynamic Model Biology Population

A simplified population model with three age groups

Population

A system dynamics model of a predator-prey lifecycle relationship

Predator Prey Population Interdpendence Foxes Rabbits Environment

World 4 is a predictive model for world population. Population has grown hyper-exponentially in the last millenium, with the doubling time decreasing from 900 years  in 1000 CE to a minimum of ~35 years in 1963 CE. Technology is defined as that which decreases the death rate and/or increases the effective birth rate (i.e. by decreasing infant mortality). Technology grows exponentially, therefore population fits a hyper-exponential (exponent within an exponent). Models for the end of growth are explored using equations that express the ways humans are depleting Earth's biocapacity, the nature of resource depletion, and the relationship between natural resources and human carrying capacity. This simple model, containing just two closed systems, captures the subtle shifts in the population trajectory of the last 50 years. Specifically, hyperexponential growth has given way to subexponential growth. A peak is predicted for the time around 2030.

Population Environment

My People grow and Your People grow.  My people use Mine. Your People use Yours. If we are Sharing, what's Mine is Yours and what's Yours is Mine.

Population

Various factors affecting South East Queensland's koala population. 

Sustainability Climate Change Population Koalas

Ecology Biology Ecosystem Population

This simulation examines carrying capacity of rural and urban populations

Population Energy Urban

Here we model the population of France given data between 1960 and 2013 from Worldbank.org. We used the crude birth rate and crude death rate for every 5 years since 1960 to 2005, and the rates every year from 2005 to 2013. To forecast, we used the slope of the net birth rate to calculate when the net birth rate would be zero, and used this year for our birth and death rates to are equal to zero. We assumed no net movement of people into or out of France.

Population Growth

Koala populations in South East Queensland have been plummeting for decades and is only speeding up. Here is a Systems Dynamics model of key factors that increase and decrease the Koala population in SEQ. 
Throughout the model it is clear that if SEQ continues to grow with urbanisation and are not proactive with community awareness, Koala numbers will plummet.

David De Marco

Koala Seq Population Death Birth

This model shows an exponential growing population

Growth Population

age demographics using Delay function

Population