AS Marine Science - key terms in marine ecology 0.0 / 5 ? Marine ScienceMarine ecosystemsASCIE Created by: Orion_MooreCreated on: 24-04-14 00:05 Ecosystem Living organisms and the physical and chemical factors with which they interact 1 of 15 Habitat A place where an organism lives 2 of 15 Population Organisms of the same species living in the same area 3 of 15 Community All the different species living in a habitat at the same time 4 of 15 Species group of similar organisms that can interbreed and produce fertile offspring 5 of 15 Biodiversity The number of different species in an ecosystem 6 of 15 Ecological niche The role of an organism within an ecosystem, taking into account its relationship with other organisms 7 of 15 Symbiosis A mutually beneficial relationship between two organisms; e.g. coral and zooxanthellae 8 of 15 Parasitism A relationship between two organisms which benefits the parasite at the expense of the host; e.g. tuna and nematodes 9 of 15 Primary producer (autotroph) An organism that produces its own food / energy; includes photosynthetic plants/algae and chemosynthetic bacteria 10 of 15 Consumer An organism that obtains its energy requirements by feeding on other organisms 11 of 15 Predator An animal that catches, kills and eats another animal 12 of 15 Prey An animal that is eaten by predators 13 of 15 Trophic level ‘Feeding levels’ in a food chain/web; position of an organism in the food chain/web 14 of 15 Succession The change in community structure over time; e.g. Tevnia and Riftia 15 of 15
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