Outputs (60)

Spatial differences in dissolved silicon utilisation in Lake Baikal, Siberia: examining the impact of high diatom biomass events and eutrophication (2018)
Journal Article
Panizzo, V., Roberts, S., Swann, G. E., McGowan, S., Mackay, A. W., Vologina, E., Pashley, V., & Horstwood, M. S. (2018). Spatial differences in dissolved silicon utilisation in Lake Baikal, Siberia: examining the impact of high diatom biomass events and eutrophication. Limnology and Oceanography, 63(4), 1562-1578. https://doi.org/10.1002/lno.10792

Recent research has highlighted how Lake Baikal, Siberia, has responded to the direct and indirect effects of climate change (e.g., ice-cover duration), nutrient loading, and pollution, manifesting as changes in phytoplankton/zooplankton populations,... Read More about Spatial differences in dissolved silicon utilisation in Lake Baikal, Siberia: examining the impact of high diatom biomass events and eutrophication.

A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements (2018)
Journal Article
Sutton, J. N., André, L., Cardinal, D., Conley, D. J., de Souza, G. F., Dean, J. R., Dodd, J., Ehlert, C., Ellwood, M. J., Frings, P. J., Grasse, P., Hendry, K., Leng, M. J., Michalopoulos, P., Panizzo, V. N., & Swann, G. E. (2018). A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements. Frontiers in Earth Science, 5, Article 112. https://doi.org/10.3389/feart.2017.00112

Silicon (Si) is the second most abundant element in the Earth’s crust and is an important nutrient in the ocean. The global Si cycle plays a critical role in regulating primary productivity and carbon cycling on the continents and in the oceans. Deve... Read More about A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements.

"Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths (2018)
Journal Article
Dejardin, R., Kender, S., Allen, C. S., Leng, M. J., Swann, G. E., & Peck, V. L. (2018). "Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths. Journal of Micropalaeontology, 37(1), 25-71. https://doi.org/10.5194/jm-37-25-2018

It is widely held that benthic foraminifera exhibit species-specific calcification depth preferences, with their tests recording sediment pore water chemistry at that depth (i.e. stable isotope and trace metal compositions). This assumed depth habita... Read More about "Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths.

Constraining modern day silicon cycling in Lake Baikal (2017)
Journal Article
Panizzo, V., Swann, G. E., Mackay, A. W., Vologina, E., Alleman, L., Andre, L., Pashley, V., & Horstwood, M. S. (in press). Constraining modern day silicon cycling in Lake Baikal. Global Biogeochemical Cycles, 31(3), https://doi.org/10.1002/2016GB005518

Constraining the continental silicon cycle is a key requirement in attempts to understand both nutrient fluxes to the ocean and linkages between silicon and carbon cycling over different timescales. Silicon isotope data of dissolved silica (δ30SiDSi)... Read More about Constraining modern day silicon cycling in Lake Baikal.

Temporal controls on silicic acid utilisation along the West Antarctic Peninsula (2017)
Journal Article
Swann, G. E., Pike, J., Leng, M. J., Sloane, H. J., & Snelling, A. M. (2017). Temporal controls on silicic acid utilisation along the West Antarctic Peninsula. Nature Communications, 14645, https://doi.org/10.1038/ncomms14645

The impact of climatic change along the Antarctica Peninsula has been widely debated in light of atmospheric/oceanic warming and increases in glacial melt over the past half century. Particular concern exists over the impact of these changes on marin... Read More about Temporal controls on silicic acid utilisation along the West Antarctic Peninsula.

Holocene carbon dynamics at the forest – steppe ecotone of southern Siberia (2016)
Journal Article
Mackay, A. W., Seddon, A., Leng, M. J., Heumann, G., Morley, D., Piotrowska, N., Rioual, P., & Swann, G. E. (2017). Holocene carbon dynamics at the forest – steppe ecotone of southern Siberia. Global Change Biology, 23(5), https://doi.org/10.1111/gcb.13583

The forest–steppe ecotone in southern Siberia is highly sensitive to climate change; global warming is expected to push the ecotone northwards, at the same time resulting in degradation of the underlying permafrost. To gain a deeper understanding of... Read More about Holocene carbon dynamics at the forest – steppe ecotone of southern Siberia.

Ecology under lake ice (2016)
Journal Article
Hampton, S. E., Galloway, A. W., Powers, S. M., Ozersky, T., Woo, K. H., Batt, R. D., Labou, S. G., O'Reilly, C. M., Sharma, S., Lottig, N. R., Stanley, E. H., North, R. L., Stockwell, J. D., Adrian, R., Weyhenmeyer, G. A., Roberts, S., & Swann, G. E. (2017). Ecology under lake ice. Ecology Letters, 20(1), 98-111. https://doi.org/10.1111/ele.12699

Winter conditions are rapidly changing in temperate ecosystems, particularly for those that experience periods of snow and ice cover. Relatively little is known of winter ecology in these systems, due to a historical research focus on summer "growing... Read More about Ecology under lake ice.

Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere glaciation (2016)
Journal Article
Swann, G. E., Snelling, A. M., & Pike, J. (in press). Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere glaciation. Paleoceanography, 31(9), https://doi.org/10.1002/2016PA002978

The Bering Sea is one of the most biologically productive regions in the marine system and plays a key role in regulating the flow of waters to the Arctic Ocean and into the subarctic North Pacific Ocean. Cores from IODP Expedition 323 to the Bering... Read More about Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere glaciation.

Insights into the transfer of silicon isotopes into the sediment record (2016)
Journal Article
Panizzo, V. N., Swann, G. E., Mackay, A., Vologina, E., Sturm, M., Pashley, V., & Horstwood, M. (2016). Insights into the transfer of silicon isotopes into the sediment record. Biogeosciences, 13(1), 147-157. https://doi.org/10.5194/bg-13-147-2016

The first δ30Si diatom data from lacustrine sediment traps are presented from Lake Baikal, Siberia. Data are compared with March surface water (upper 180 m) δ30SiDSi compositions for which a mean value of +2.28‰ ±  0.09 (95 % confidence) is derived.... Read More about Insights into the transfer of silicon isotopes into the sediment record.

An experiment to assess the effects of diatom dissolution on oxygen isotope ratios (2015)
Journal Article
Smith, A. C., Leng, M. J., Swann, G. E., Barker, P. A., Mackay, A. W., Ryves, D. B., Sloane, H. J., Chenery, S. R., & Hems, M. (2016). An experiment to assess the effects of diatom dissolution on oxygen isotope ratios. Rapid Communications in Mass Spectrometry, 30(2), 293-300. https://doi.org/10.1002/rcm.7446

Rationale: Current studies which use the oxygen isotope composition from diatom silica (δ18Odiatom) as a palaeoclimate proxy assume that the δ18Odiatom value reflects the isotopic composition of the water in which the diatom formed. However, diatoms... Read More about An experiment to assess the effects of diatom dissolution on oxygen isotope ratios.