Please enable JavaScript.
Coggle requires JavaScript to display documents.
population dynamics, a way to find out if the population is increasing is…
population dynamics
Environment and Resource Avaibilty
A tropical rainforest can support large populations of trees. A desert however, will probably support few or no trees.
Each envirnonment has different ammount of resources that living things need,such as food,water and space.
Resource Avabilty: Resources in an environment,such as food,water,space etc.
The Carrying capacity is the maximum number of individuals of one specie on the environment can survive. depending on limting factors like: water,fooda,availabity and food
The amount of resources in an area,influences the size of a population
Biotic and abiotic factors
Limiting factor: A part of the environment that keeps a population's size at a level below its full potential.
Biotic factors:
Biotic factors;Living part part of an environment
r
Interaction between organisms in an area.
organisms are connected to all organisms.
Living things
Abiotic factors: Non-living of an envirnoment,such as water,nutrientss,soil,sunlight,rainfall or temperature.
Abiotic factors influences where organisms can survive
Organisms need these resources to survive.
Migration
Migration: Is the movement of people from one place to another
Imigration: Is the people leaving their countries to go live in your country
Imigration = population increases
Emigration = population decreases
Emigration: When you leave your country to go to live in another country
Birth rate and death rate
Birth rate; the number of births occuring in a period of time
Death or mortality rate: The number of deaths in a period of time
Births= the population is increasing
Deaths= the population is decreasing
Survivorship curve
Graph that shows the number or proportion surviving the each age for a given species or group
Less developed countries tend to people do not survive in very old ages,tend to have an actual pyramid shape
type 1: humans or even large species: normally they live their expected lifespan and die in old ages
type 2: coral - there is constant death rate throughout the lifespan
there are 3 types of species in a survivorship curve:
type 3: plants -There are many young,many of them will die at a very young age.
Cooperation and competition
Cooperation occurs when individuals work toghter. Cooperation helps indibiduals get resources,which increases the population.
A speacie has more chances of survival if they work together to survive.
Cooperation is fundamental to the survival of many bacterial species. With the cooperation,the population increases.
As living things try to gather the resources they need,they often interaction with each other,sometimes interactions help one individual and warm another.
Competition is when two or more individuals try to use the same limited resource. Competition can happen among individuals in a population.
a way to find out if the population is increasing is the calculate the births-deaths
growth rate = births- deaths
Age structure: The distribution of indivuals among different ages in a population. They can be represented in graphs or populatiion pyramids