From Plant Press Vol. 16 no. 4, October 2013
To better understand the longevity ecology of the coralline algae, Clathromorphum compactum, a prime Arctic/Subarctic climate archive species, Walter H. Adey spent 10 weeks during the 2013 summer on a cruise of the R/V Alca i in northern Labrador, Canada. The cruise was funded largely through a Canadian Natural Sciences and Engineering Research Council (NSERC) grant to himself and his two colleagues, Jochen Halfar at the University of Toronto and Patrick Gagnon at Memorial University of Newfoundland. Halfar and Gagnon did not participate in the cruise at sea, but each provided a graduate student/diver, both of which were also carrying out their personal doctoral research as part of the cruise.
The vessel crew totaled seven: Adey serving as vessel captain and chief scientist on the cruise, a chief engineer, an administrative officer, a cook and three Ph.D. student/SCUBA divers—Thew Suskiewicz of Laval University, David Belanger of Memorial University, and Michael Fox of Scripps Institute of Oceanography. Suskiewicz carried out experimental analyses of sea urchin feeding rates on kelp and Belanger analyzed infauna within the coralline rhodoliths Lithothamnion glaciale and Lithothamnion tophiforme.
Approximately 80 SCUBA dives to depths of up to 30 meters were carried out, two thirds with two divers and one third with three divers. During most of the work season, bottom working temperatures ranged from -1.5ᵒ C to +2ᵒ C, limiting dives to about 50 minutes.