Short-term oceanographic instrument deployments were conducted at the same sites on 12-15 November 2015 and 16-23 May 2016. Instrument package deployments included a SAMI-pH sensor (Sunburst Sensors, 15 min sampling interval), SBE-37 Microcat (Sea-Bird Electronics, 20 sec sampling interval), and dissolved oxygen sensor (RBR, 1 min sampling interval) which were affixed to the reef at 7 m (east) and 10 m (west) depth.

Samples were collected during expeditions aboard:

• R/V Machias (12–15 November 2015)
• NOAA ship Oscar Elton Sette (17–23 May 2016)

Research activities and sample collection were conducted under U.S. Fish and Wildlife Service Pacific Reefs National Wildlife Refuge Complex Research and Monitoring Special Use Permits:

• 12521-10001 (effective date: 15 Jan 2010; expiration date: 30 May 2010)
• 12521-12001 (effective date: 7 Feb 2012; expiration date: 31 Dec 2012)
• 12521-12005 (effective date: 29 Aug 2012; expiration date: 30 June 2014)
• 12521-14001 (effective date: 1 Jan 2015; expiration date: 31 Dec 2015)
• 12513-15001 (effective date: 11 Nov 2015; expiration date: 31 Dec 2015)

and in compliance with Presidential Proclamation 8336.