Karley Campbell » Members
Here you can find a list of all ARCTOS members and PhD students. In the drop-down menu you can either select the member status or the institution the member belongs to.
- sea ice
- climate change.
Life in the oceans is supported by an abundance of microscopic algae and bacteria that synthesize organic compounds and recycle them within the lower trophic levels, respectively. The activity of these microorganisms also influences the movement of carbon dioxide (CO2) between oceans and the atmosphere , which is an important function given the rising CO2 emissions that are currently driving a warming trend of the global climate . In particular, the polar regions are warming faster than anywhere else on Earth, and the resulting impact on cryosphere systems is substantial [3; 4]. Changes in sea ice volume, seasonality and coverage in the Arctic Ocean are particularly concerning for specialized algae and bacteria that inhabit sea ice [5; 6]. The uncertain response of these vulnerable sea ice algae and bacteria to environmental change has been the focus of my research. This has involved method development to quantify abundance and productivity, field-based process studies to assess biological-physical coupling, and stressor experiments on ice algae cultures to target species-specific responses. I am also interested in the composition of microbial communities and how this varies with growth conditions characteristic of different ice habitats. This involves taxonomic identification of sea ice algae, as well as collaborations (eg Sanchez-Baracaldo laboratory Bristol, UK) to complete metagenomic analyses.
References:  Falkowski et al. 1998, Science, 200-206;  Graverson et al., 2008, Nature Lett. 53-57;  Hansen et al., 2010, Reviews Geophys. RG4004;  Screen and Simmonds, 2010, Nature Lett. 1334-1337;  Vihma et al., 2014, Surv. Geophys. 1175-1214;  Leu et al., 2015, Prog. Oceanogr. 151-170.
- Diatom-ARCTIC: Diatom Autoecological Responses to Changes in Ice Cover, University of Bristol, UK, Co-Investigator
- SIMEP: Southampton Island Marine Ecosystem Project, University of Manitoba, Canada, Collaborator
- Multidisciplinary Arctic Program, Department of Fisheries and Oceans Canada, Collaborator
Selected recent scientific publications:
- Campbell, K, Mundy, CJ, Juhl, AR, Dalman, L, Michel, C, Galley, RJ, Else, B, Geilfus, NX and S Rysgaard (2019), ‘Melt Procedure Affects the Photosynthetic Response of Sea Ice Algae’. Frontiers in Earth Science, vol 7(21), doi: 10.3389/feart.2019.00021.
- Lange, BA, Haas, C, Charette, J, Katlein, C, Campbell, K, Duerksen, S, et al. (2019), ‘Contrasting ice algae and snow-dependent irradiance relationships between ﬁ rst-year and multiyear sea ice ’. Geophysical Research Letters, vol 46, pp 10834–10843.
- Dalman, L, Else, B, Barber, DG, Williams, WJ, Carmack, E, Campbell, K, Duke, P and CJ Mundy (2019), ‘Enhanced ice algal biomass along a tidal strait in the lower NW Passage of the Canadian Arctic ‘. Elementa Science of the Anthropocene, vol 7 (22), doi: 10.1525 / elementa.361.
- Campbell, K, Mundy, C, Belize, C, Aurelie, D and S Rysgaard (2018), ‘Seasonal dynamics of algal and bacterial communities in Arctic sea ice under variable snow cover’. Polar Biology, vol 41, pp 41-58.
- Leeuwe, van MA, Tedesco, L, Arrigo, KR, Assmy, P, Campbell, K, Meiners, KM, Rintala, J-M, Thomas, D and J Stefels (2018), ‘Micro-algal community structure and primary production in Arctic and Antarctic sea ice: A synthesis’, Elementa: Science of the Anthropocene 6(1), doi: 10.1525/elemnta.267.
- Campbell, K, Mundy, CJ, Gosselin, M, Landy, JC, Delaforge, A and S Rysgaard (2017), ‘Net community production in the bottom of first-year sea ice over the Arctic spring bloom’. Geophysical Research Letters, vol 44., pp 8971-8978.
- Campbell, K, Mundy, CJ, Landy, JC, Delaforge, A, Michel, C and S Rysgaard (2016), Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic, Progress in Oceanography 149, pp 27-39.
- Campbell, K, Mundy, C, Barber, D and M Gosselin (2015), ‘Characterizing the sea ice algae chlorophyll a – snow depth relationship over Arctic spring melt using transmitted irradiance’. Journal of Marine Systems, vol 147, pp 76-84.
- Leu, E, Mundy, CJ, Assmy, P, Campbell, K, Gabrielsen, TM, Gosselin, M, Juul-Pedersen, T and R Gradinger (2015), ‘Arctic spring awakening – steering principles behind the phenology of vernal ice algae blooms’, Progress in Oceanography 139, pp 151-170.