What is an Ecosystem?


Edexcel A2 Biology, Topic 5, 5.1, On the wild side, Key terms
Flashcards by sofia.momoko, updated more than 1 year ago
Created by sofia.momoko over 9 years ago

Resource summary

Question Answer
Abiotic Factors Non living factors in an ecosystem
Abundance Number of a particular population in a given area
Factors affecting ecosystems arising from human activity Anthropogenic factor
Living factors in an ecosystem Biotic factor
Final stable community at the end of the process of succession Climax Community
When succession is not completed due to human activity Deflected succession
Factors that have a greater effect on a population when the population is large Density dependent
Description of where a particular species can be found Distribution
Interaction between the living and non living components in a given area Ecosystem
Factors related to soil Edaphic factor
Type of feeding relationship between a herbivore and plants Grazing
Place where an organism lives Habitat
Competition for resources between organisms of different species Interspecific Competeion
Competition of resources between organisms of the same species Intraspecific Competition
Type of bar chart representing distribution and abundance of organisms Kite diagram
Feeding/living arrangement between two organisms where both benefit Mutualism
Description of the relational position of a species in its ecosystem Niche
Relation ship where one organism feeds from the other living organism Parasitism
Pioneer community First species to colonise bare rock
Feeding relationship where one organism kills and eats the other Predation
Succession which occurs in an area where no previous communities existed Primary Succession
Succession which occurs on land that has been cleared, where communities existed before Secondary Succession
Communities that develop during succession between the pioneer community and the climax community Seres
Animal that does not move, e.g. attached to rocks Sessile
Measure of the spread of data about a mean Standard deviation
Process of changes in a community over time brought about by the changes in abiotic factors caused by previous communities Succession
Description of the profile of an area, including altitude, slope, aspect and drainage Topography
The line across and area to be inspected Transect
Feeding level in a food chain or web Trophic level
Adaptation of plants that enable them to survive dry conditions Xerophytic properties
Organisms who are able to synthesise organic compounds from simple molecules, such as carbon dioxide Autotroph
Organisms who obtain their food and energy from organic compounds Heterotrophs
Organisms who are autotrophic at the start of a food chain Producer
Organisms who are heterotrophic and feed on producers (herbivores) Primary Consumer
Organisms that feed on primary consumers Secondary Consumer
An organism that feeds on dead and decaying matter, including bacteria and fungi Decomposer
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