Table 2

Details of the sampling events conducted between May 2019 and June 2020.

Immersion period Season Slides placed Slides collected
One-month immersion period Spring May 10, 2019 June 10, 2019
  Summer June 10, 2019 July 15, 2019
  Autumn September 30, 2019 November 3, 2019
  Winter February 2, 2019 March 8, 2020
       
Two-months immersion period Spring March 8, 2020 June 5, 2020*
  Summer June 10, 2019 August 15, 2019
  Autumn September 30, 2019 December 2, 2019
  Winter December 2, 2019 February 2, 2020

*Immersion period prolonged due to COVID-19 pandemic.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.