Successfully restoring kelp forests in any given location requires that out-planted populations be physiologically capable of surviving an increasingly stressful future. In other words, the restored kelp forests must be ‘future-proof’ – that is, robust to future climate changes. Doing so requires a strong understanding of the genetic and phenotypic variability within and across natural kelp populations, so as to be able to manage kelp forests and promote long-term ecological and climatic resilience.
Global efforts to develop scale-able technologies for kelp restoration are rapidly outpacing research focused on the intraspecific variability that must be harnessed to ensure ‘future proof’ forests. The novel “Green Gravel” method offers a potentially rapid way to seed a reef with young kelps that doesn’t rely entirely on time-intensive SCUBA diving. This method has been tested abroad, but not yet in the Pacific Northwest. While this is a promising methodology, critical questions remain regarding the biology of these species and about the potential adverse effects of poorly planned restoration initiatives, in particular:
Supported by PSF, Post Doctoral researcher Dr. Samuel Starko from University of Victoria’s Baum Lab is setting out to address these key questions. The project focuses on the two locally dominant forest-forming kelp species, Macrocystis pyrifera (giant kelp) and Nereocystis luetkeana (bull kelp), and will 1) characterize genetic diversity and structure of canopy-forming kelps in British Columbia to identify hotspots of genetic diversity that may be of particular conservation concern; and 2) use common garden experiments to determine whether out planting a low diversity of stress-tolerant genotypes will yield improved restoration outcomes over a random, but diverse set of genotypes collected throughout the region.
This project was featured in this 2022 Nearshore and Estuary newsletter.