Fig. 1
From: Diel population and functional synchrony of microbial communities on coral reefs
Diel sampling design and reef site properties. a Collapsible benthic isolation tents (cBIT) were equipped with an autonomous night sampling mechanism. Microbial communities were collected via negative pressure through silicone tubing (a) onto a 0.22 µm Sterivex filter (b). Temporal sampling was triggered by an in-line time-release valve (c) preceding a steel tank that provided vacuum pressure (d). All benthic chambers included a multiparameter sonde (e) to continuously monitor temperature, specific conductivity, dissolved oxygen, and pH. Photo credit: Jennifer Smith. b Percent cover of benthic assemblages at each reef site. c Geochemical measurements for a 24-h diel period (boxes represent the mean ± SD from all four islands for the minimum (Min) and maximum (Max) of each analyte, N = 16); dissolved oxygen (µmoles kg−1); Temperature °C. d Dissolved organic carbon (DOC) concentrations (right-hand y-axis; µmoles l−1 and humic-like fluorescent dissolved organic matter (fDOM; left-hand y-axis; Raman units) measured in the water column offshore and within each benthic chamber on the forereef at three time-points (points represent the mean ± s.d. from all four islands, N = 83)
