Populations and Ecosystems 1.1
Specification A population is all the organisms of one species in a habitat. Populations of different species form a community. Within a habitat a species occupies a niche governed by adaptation to both biotic and abiotic conditions.
Study of inter-relationships between organisms in their environment. ‘Environment’ includes biotic (living) and abiotic (non-living) organisms. Biotic features could include: competition, predators etc. Abiotic features could include: temp, rainfall, pH etc. Looks at the biosphere (areas of land, sea and air) of the earth that are life supporting.
energy and cycling of elements within system. Example = pond. Made up of a number of species.
Group of interbreeding organisms in one species within a habitat. Edge of population hard to determine. Factors include: species type, size of creature, ability to move long distances etc. Populations of different species form a community.
All the populations of different organisms living and interacting in a particular place at the same time. Can include a large range of species of animals, plants, fungi, bacteria etc.
Place where a community of organisms live. An ecosystem can contain many habitats. Each habitat can be divided into smaller units called a microhabitat.
Describes how an organism fits into environment. (Adaptation to factors etc) Refers to all the factors in the area that allow organism to survive and reproduce. No two species occupy same niche.
Each species occupy an ecological niche within their microhabitat. A group of one Species forms a Population. Populations of different species form a Community; these live in a Habitat. A group of habitats then make up an Ecosystem.