Key Definitions and Concepts Flashcards
Biogeography
Study of past and present geographic distributions of organisms
Phytogeography
Study of past and present distributions of plants
Zoogeography
Study of past and present distributions of animals
Ecological biogeography
Study of modern relationships between organisms and their environment
Historical biogeography
study of past distributions and evolution of organisms
Conservation biogeography
Application of biogeographical studies for conservation
Ecology
study of the relationship of the organism to the environment
Taxonomy
classification and naming of organisms
Taxon
Observable traits (characters) to group organisms together & differentiate them from other groups, Physical and Genetic
Species
A group of organism that can successfully interbreed with each other but not members of other groups
Genus
Combination of generic and specific name
Taxonomic Hierarchy
- Order, proboscidea
- Class, mammalia
- Phylum, chordata
- kingdom, animalia
Ecological hierarchy
- individual
- population
- community
- ecosystem
- biome
- biosphere
Population
all the individuals of a particular species in a specific area
Community
All the populations of different species in a specific area
Ecosystem
The community plus its physical environment
Biome
Macro-scale classification of vegetation type and associated climate
Biosphere
All life on the planet
Trophic Hierarchy
The flow of energy through ecosystems
Trophic levels
different levels of an ecosystem through which energy flows
Primary produces
- Plants
- Autotrophs
- Lowest trophic level
Primary consumers
Eat plants to obtain energy
- Herbivores
Secondary Consumers
Eat primary consumers
- Carnivores
Tertiary Consumers
Carnivores which eat secondary consumers
Decomposers
recycle dead organisms at all trophic levels
The 10% rule
only 10% of the energy in one trophic level is passes onto the next
lost through respiration
Gross Primary Productivity (GPP)
total energy in an ecosystem ‘fixed’ by photosynthesis
Net Primary Productivity (NPP)
GPP minus energy lost by respiration
energy converted into plant matter (biomass)