Dry and wet periods drive rapid shifts in community assembly in an estuarine ecosystem

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A long-term study of invertebrates in SF Bay demonstrates how extreme events and shifts in climate regimes alter ecological comminutions. Winter salinity has a dramatic effect on which invertebrates are present during the following summer. Changes may occur gradually as salinity changes, but only up to a point. Once a critical threshold is passed, the community is entirely replaced. 

Read about the study.