24 entries under concept topic. ×

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land(noun, area, science, ecology)
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surface(noun, area, science, ecology)
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aquatic fauna(noun, expression, area, science)
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biogeographic province(noun, expression, area, science)
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crisis ecoregion(noun, expression, area, science)
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ecosystem(noun, area, science, ecology)
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environmental conditions(noun, expression, area, science)
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freshwater ecoregion(noun, expression, area, science)
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land ecoregion(noun, expression, area, science)
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large marine ecosystem(noun, expression, area, science)
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marine ecoregion(noun, expression, area, science)
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marine province(noun, expression, area, science)
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terrestrial ecoregion(noun, expression, area, science)
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terrestrial fauna(noun, expression, area, science)
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climate(noun, area, science, ecology)
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dynamics(noun, area, science, ecology)
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ecotone(noun, area, science, ecology)
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geology(noun, area, science, ecology)
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habitat(noun, area, science, ecology)
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hydrology(noun, area, science, ecology)
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APASmart Define. (1970). ecoregion thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/ecoregion/thesaurus/narrower
ChicagoSmart Define. 1970. "ecoregion thesaurus" https://smartdefine.org/ecoregion/thesaurus/narrower (accessed September 25, 2026).
HarvardSmart Define 1970, ecoregion thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/ecoregion/thesaurus/narrower>.
MLASmart Define. "ecoregion thesaurus" 1 January 1970. Web. 25 September 2026. <https://smartdefine.org/ecoregion/thesaurus/narrower>