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Summary A Level Biology Notes - Populations and Ecosystems £4.49   Add to cart
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Summary A Level Biology Notes - Populations and Ecosystems
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Complete AQA A Level Biology notes on populations and ecosystems with diagrams, definitions to support your understanding. Details include: Definition of keywords Predator prey relationships Investigating populations Succession Conservation of habitats

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  • Populations and ecosystems
  • November 30, 2020
  • 4
  • 2019/2020
  • Summary

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Populations and Ecosystems

Abiotic An ecologicalfactor that makes uppartof the non biological environmentof
an organism
Abundance Number of individual species in a given space

Biosphere Zone of air land and water where organisms exist
Biotic An ecological factor that makes up part ofthelivingenvironment of an organis

carrying capacity population size that an ecosystem cansupport
community Alltheliving organisms present in an ecosystem at a given time

Ecology study of inter relationships between organisms andtheir environment
Ecosystem Alltheliving and nonliving components of a particular area

Habitat Theplace where an organismnormallylives and which is characterised
by
physical conditions and thetypes of other organisms present

Interspecific competition Competition between organismsof differentspecies
Intraspecific competition competition between organisms of the same species

limitingFactors Avariablethatlimitstherateof a chemical reaction
Microhabitat Smallerunits within a habitat each withtheir own microclimate
Niche The role or function an organism plays intheir ecosystem
Populations Agroupof individuals of thesame species that occupy the same habitat

atthesametime
Predation When one organism is consumed by another
Predator organism thatfeeds on another organism
Predator prey Relationship How population of predator are dependent on eachothe
prey
Prey Organism which is beingfed by other organisms
selection pressure Environmentalforce altering thefrequencies of alleles in a populatio

species Groupofsimilarorganisms that can breedtogether to produce a fertile offspring

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