24 entries under noun topic. ×

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land(concept, area, science, ecology)
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surface(concept, area, science, ecology)
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aquatic fauna(expression, concept, area, science)
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biogeographic province(expression, concept, area, science)
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crisis ecoregion(expression, concept, area, science)
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ecosystem(concept, area, science, ecology)
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environmental conditions(expression, concept, area, science)
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freshwater ecoregion(expression, concept, area, science)
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land ecoregion(expression, concept, area, science)
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large marine ecosystem(expression, concept, area, science)
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marine ecoregion(expression, concept, area, science)
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marine province(expression, concept, area, science)
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terrestrial ecoregion(expression, concept, area, science)
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terrestrial fauna(expression, concept, area, science)
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climate(concept, area, science, ecology)
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dynamics(concept, area, science, ecology)
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ecotone(concept, area, science, ecology)
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geology(concept, area, science, ecology)
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habitat(concept, area, science, ecology)
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hydrology(concept, area, science, ecology)
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APASmart Define. (1970). ecoregion thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/ecoregion/thesaurus/narrower
ChicagoSmart Define. 1970. "ecoregion thesaurus" https://smartdefine.org/ecoregion/thesaurus/narrower (accessed September 29, 2026).
HarvardSmart Define 1970, ecoregion thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/ecoregion/thesaurus/narrower>.
MLASmart Define. "ecoregion thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/ecoregion/thesaurus/narrower>