Ecosystems

Study of the relationships between living organisms, including humans and their physical environment

A balanced biological system where all the organisms and non living components interact in a particular location.

The place wheree an organism lives

The role and position of an organism in its environment including all interaction with the biotic and abiotic factors of its environment

Factors of a habitat that affect an organism

Part of the environment of an organism that is living

A part of the environment of an organism that is non living

Aspects of the environment which restrict population size

Group of organisms who share large number of common characteristics and can interpreted to produce fertile offspring

Group of organisms of a single species inter breeding and occupying a particular habitat

Interacting populations of two or more species in the same habitat at the same time

They are constantly changing

natality mortality immigration into the population emigration away predation parisitism disease

Max population size that can be sustained over a period of time in a particular environment

availability of resources effect of other species

lag phase log/ exponential phase stationary phase death phase

Very slow growth rate Few individuals/ shortage of reproducing individuals Period of adaptation to a new environment

Max rate of pop growth Plentiful resources No limiting factors

Natality equals mortality Environmental resistance Carrying capacity has been reached

Mortality rate is greater than natality rate e.g Food source depleted

B/Y are synthesizing new proteins Ro cell division is low

Plenty of nutrients No limiting factors Max Ro pop growth: doubling in a unit time

Increase in limiting factors Ro cell death= Ro cell division

build up of toxic waste Nutrients used up Overcrowding