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Key definitions, Succession, Energy systems and cycles
Ecosystem
All the species and non-living components interacting within an environment [1]
Habitat
Where an organism, animal, plant, population, or community lives [1]
Niche
Role of an organism in the ecosystem, habitat, environment, or community [1]
Biotic factors
Living components of an ecosystem (e.g., competition, predation, disease) [1][2]
Abiotic factors
Non-living components of an ecosystem (e.g., temperature, light intensity, pH) [2]
Autotroph
A producer, such as plants that use photosynthesis to make complex organic molecules [3]
Heterotroph
Organisms that acquire nutrients and energy by ingesting other organisms [4]
Trophic level
Stage or level in a food chain [4]
Primary producer
Organism that can manufacture its own complex organic molecules from inorganic molecules [4][5]
Primary consumer
Organism that obtains food by eating only producers (herbivore) [5]
Gross primary productivity
Rate at which plants convert light energy to chemical energy [5]
Net productivity
Energy captured as biomass available to the next trophic level [6]
Biomass
Mass of living material [6]
Ecological efficiency
Efficiency of energy or biomass transfer from one trophic level to the next [7]
Nitrogen cycle
Includes processes like nitrogen fixation, nitrification, and denitrification [8]
Carbon cycle
Involves photosynthesis, respiration, and decomposition [9]
Ecological succession
Directional change through time of the community composition in an area [10]
Pioneer community
Colonizers at the beginning of succession [10]
Climax community
Community of species in a stable state [10]
What is the equation for efficiency of biomass transfer?
Biomass transfer/Biomass intake x 100
Note
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