When fluctuations shape biodiversity: A minimalist model explains why 'rarity' is so common
Phys.org
February 18, 2026
An ecosystem is not a still life. Even where everything looks stable—a woodland, a lake, the soil—the internal "bookkeeping" keeps changing: how many individuals belong to which species, and for how long. Some populations expand, others crash. That dynamism is part of what we call biodiversity, but it also carries risk: when numbers are very low, chance events and short spells of unfavorable conditions can increase the likelihood that a species disappears locally.
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Originally published on Phys.org on 2/18/2026