The tropics are clearly defined while ‘subtropics’ and ‘subtropical’ have been applied to a variety of zones, climates, and ecosystems. However, in the recent terrestrial biology literature, they have been used mainly for the zones between the tropics (±23.4oC) and ±30.0o. Adopting this standard would facilitate pan‐subtropical comparisons.
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Richard T. Corlett (2013) studied this question.
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