H-Print: a new chemical fingerprinting approach for distinguishing primary production sources in Arctic ecosystems
- 351 Downloads
The unambiguous identification of discrete sources of organic matter is critical for understanding the processes that affect ecosystem structure. Here, we demonstrate how changes in the relative proportions of highly branched isoprenoid lipids can provide a straightforward analytical method to distinguish between organic matter derived from sea ice and seawater within an Arctic ecosystem. In combination with stable isotope analysis, we reconstruct the organic matter pathway across trophic levels, thereby elucidating specific organic matter energy transfers. Combined, these methods will provide a useful analytical approach for determining ecosystem structure in the future. This is likely to become increasingly important as the Arctic continues to experience a phase of rapid climate change.
KeywordsHighly branched isoprenoid (HBI) Diatom Arctic Ecosystem Ringed seals H-Print
TB and SB would like to thank Plymouth University for financial support. We also thank the Holman Hunters and Trappers Association for collecting seals, and in particular, Lois Harwood and John Alikamik. Collections were conducted under a Fisheries and Oceans Canada license to fish for scientific purposes (S-11/12-1010-NU-A1), supported by Natural Sciences and Engineering Research Council of Canada—Ocean Tracking Network (DJY).
- Belt ST, Brown TA, Ringrose AE, Cabedo-Sanz P, Mundy CJ, Gosselin M, Poulin M (2013) Quantitative measurement of the sea ice diatom biomarker IP25 and sterols in Arctic sea ice and underlying sediments: further considerations for palaeo sea ice reconstruction. Org Geochem 62:33–45Google Scholar
- Brown TA (2011) Production and preservation of the Arctic sea ice diatom biomarker IP25. PhD thesis. University of Plymouth, PlymouthGoogle Scholar
- Brown TA, Belt ST, Philippe B, Mundy CJ, Massé G, Poulin M, Gosselin M (2011) Temporal and vertical variations of lipid biomarkers during a bottom ice diatom bloom in the Canadian Beaufort Sea: further evidence for the use of the IP25 biomarker as a proxy for spring Arctic sea ice. Polar Biol 34:1857–1868CrossRefGoogle Scholar
- Brown TA, Belt ST, Ferguson SH, Yurkowski DJ, Davison NJ, Barnett JEF, Jepson PD (2013a) Identification of the sea ice diatom biomarker IP25 and related lipids in marine mammals: A potential method for investigating regional variations in dietary sources within higher trophic level marine systems. J Exp Mar Biol Ecol 441:99–104CrossRefGoogle Scholar
- Forest A, Tremblay J-É, Gratton Y, Martin J, Gagnon J, Darnis G, Sampei M, Fortier L, Ardyna M, Gosselin M, Hattori H, Nguyen D, Maranger R, Vaqué D, Marrasé C, Pedrós-Alió C, Sallon A, Michel C, Kellogg C, Deming J, Shadwick E, Thomas H, Link H, Archambault P, Piepenburg D (2011) Biogenic carbon flows through the planktonic food web of the Amundsen Gulf (Arctic Ocean): a synthesis of field measurements and inverse modelling analyses. Prog Oceanogr 91:410–436CrossRefGoogle Scholar
- Harwood LA, Smith TG, Melling H, Alikamik J, Kingsley MCS (2012) Ringed seals and sea ice in Canada’s Western Arctic: harvest-based monitoring 1992–2011, vol 65. 2012, vol 4Google Scholar
- Hobson KA, Schell DM, Renouf D, Noseworthy E (1996) Stable carbon and nitrogen isotopic fractionation between diet and tissues of captive seals: implications for dietary reconstructions involving marine mammals. Can J Fish Aquat Sci 53:528–533Google Scholar
- Magen C, Chaillou G, Crowe SA, Mucci A, Sundby B, Gao A, Makabe R, Sasaki H (2010) Origin and fate of particulate organic matter in the southern Beaufort Sea—Amundsen Gulf region, Canadian Arctic. Estuar, Coast Shelf Sci 86(1):31–41Google Scholar