Fig. 2: Water clarity (A) during and after COVID-induced closure period and (B) as a function of total visitors to the Hanauma Bay Nature Preserve, O‘ahu, Hawai‘i per day. | npj Ocean Sustainability

Fig. 2: Water clarity (A) during and after COVID-induced closure period and (B) as a function of total visitors to the Hanauma Bay Nature Preserve, O‘ahu, Hawai‘i per day.

From: COVID-19 anthropause affects coral reef ecosystems through biophysical changes

Fig. 2

Clarity was quantified by horizontal visual reading of the Secchi disc just below the water surface. In A, Points are jittered along the x-axis to improve visibility. In B, gray shading represents the 95% confidence interval. Zero values on the x-axis reflect days when the bay was closed during the COVID period.

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