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Dr Mark Stevenson's Outputs (23)

Non-avian dinosaur eggshell calcite can contain ancient, endogenous amino acids (2023)
Journal Article
Saitta, E. T., Vinther, J., Crisp, M. K., Abbott, G. D., Wheeler, L., Presslee, S., …Penkman, K. E. (2024). Non-avian dinosaur eggshell calcite can contain ancient, endogenous amino acids. Geochimica et Cosmochimica Acta, 365, 1-20. https://doi.org/10.1016/j.gca.2023.11.016

Proteins are the most stable of the macromolecules that carry genetic information over long periods of time. Closed systems are more likely to retain endogenous proteins or their degradation products. Amino acid racemisation data in experimental and... Read More about Non-avian dinosaur eggshell calcite can contain ancient, endogenous amino acids.

Unprecedented sea-ice minima enhances algal production deposited at the Arctic seafloor (2023)
Journal Article
Stevenson, M. A., Airs, R. L., & Abbott, G. D. (2023). Unprecedented sea-ice minima enhances algal production deposited at the Arctic seafloor. Environmental Research Letters, 18(11), Article 114046. https://doi.org/10.1088/1748-9326/ad044a

Sea-ice in the Arctic is declining, with 2018 a particularly low year for ice extent, driven by anomalously warm atmospheric circulation in winter 2017/18. This is consistent with a multi-decadal trend to an earlier ice-free Barents Sea as climate ch... Read More about Unprecedented sea-ice minima enhances algal production deposited at the Arctic seafloor.

Biomarker proxies for reconstructing Quaternary climate and environmental change (2023)
Journal Article
McClymont, E. L., Mackay, H., Stevenson, M. A., Damm-Johnsen, T., Honan, E. M., Penny, C. E., & Cole, Y. A. (2023). Biomarker proxies for reconstructing Quaternary climate and environmental change. Journal of Quaternary Science, 38(7), 991-1024. https://doi.org/10.1002/jqs.3559

To reconstruct past environmental changes, a range of indirect or proxy approaches can be applied to Quaternary archives. Here, we review the complementary and novel insights which have been provided by the analysis of chemical fossils (biomarkers).... Read More about Biomarker proxies for reconstructing Quaternary climate and environmental change.

New evidence for preservation of contemporary marine organic carbon by iron in Arctic shelf sediments (2022)
Journal Article
Faust, J. C., Ascough, P., Hilton, R. G., Stevenson, M. A., Hendry, K. R., & Marz, C. (2023). New evidence for preservation of contemporary marine organic carbon by iron in Arctic shelf sediments. Environmental Research Letters, 18(1), Article 014006. https://doi.org/10.1088/1748-9326/aca780

The protection of organic carbon through association with iron minerals (FeR) is an important factor in its stabilisation, long-term storage, and burial efficiency in marine sediments. However, large uncertainties still exist concerning the sources,... Read More about New evidence for preservation of contemporary marine organic carbon by iron in Arctic shelf sediments.

Heterogeneity in diatom diversity response to decadal scale eutrophication in floodplain lakes of the middle Yangtze reaches (2022)
Journal Article
Chen, X., Liang, J., Zeng, L., Cao, Y., & Stevenson, M. A. (2022). Heterogeneity in diatom diversity response to decadal scale eutrophication in floodplain lakes of the middle Yangtze reaches. Journal of Environmental Management, 322, Article 116164. https://doi.org/10.1016/j.jenvman.2022.116164

Eutrophication substantially alters biotic communities and has become a major threat to biodiversity conservation in lake ecosystems. However, little is known about how long-term diversity dynamics respond to nutrient enrichment among lakes in differ... Read More about Heterogeneity in diatom diversity response to decadal scale eutrophication in floodplain lakes of the middle Yangtze reaches.

Biogeochemical consequences of a changing Arctic shelf seafloor ecosystem (2021)
Journal Article
März, C., Freitas, F. S., Faust, J. C., Godbold, J. A., Henley, S. F., Tessin, A. C., Abbott, G. D., Airs, R., Arndt, S., Barnes, D. K., Grange, L. J., Gray, N. D., Head, I. M., Hendry, K. R., Hilton, R. G., Reed, A. J., Rühl, S., Solan, M., Souster, T. A., Stevenson, M. A., …Widdicombe, S. (2022). Biogeochemical consequences of a changing Arctic shelf seafloor ecosystem. AMBIO: A Journal of the Human Environment, 51, 370-382. https://doi.org/10.1007/s13280-021-01638-3

Unprecedented and dramatic transformations are occurring in the Arctic in response to climate change, but academic, public, and political discourse has disproportionately focussed on the most visible and direct aspects of change, including sea ice me... Read More about Biogeochemical consequences of a changing Arctic shelf seafloor ecosystem.

Lake ecosystem on the Qinghai–Tibetan Plateau severely altered by climatic warming and human activity (2021)
Journal Article
Liang, J., Lupien, R. L., Xie, H., Vachula, R. S., Stevenson, M. A., Han, B.-P., Lin, Q., He, Y., Wang, M., Liang, P., Huang, Y., McGowan, S., Hou, J., & Russell, J. M. (2021). Lake ecosystem on the Qinghai–Tibetan Plateau severely altered by climatic warming and human activity. Palaeogeography, Palaeoclimatology, Palaeoecology, 576, Article 110509. https://doi.org/10.1016/j.palaeo.2021.110509

Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? (2020)
Journal Article
Faust, J. C., Stevenson, M. A., Abbott, G. D., Knies, J., Tessin, A., Mannion, I., Ford, A., Hilton, R., Peakall, J., & März, C. (2020). Does Arctic warming reduce preservation of organic matter in Barents Sea sediments?. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378(2181), Article 20190364. https://doi.org/10.1098/rsta.2019.0364

Over the last few decades, the Barents Sea experienced substantial warming, an expansion of relatively warm Atlantic water and a reduction in sea ice cover. This environmental change forces the entire Barents Sea ecosystem to adapt and restructure an... Read More about Does Arctic warming reduce preservation of organic matter in Barents Sea sediments?.

Transformation of organic matter in a Barents Sea sediment profile: coupled geochemical and microbiological processes (2020)
Journal Article
Stevenson, M. A., Faust, J. C., Andrade, L. L., Freitas, F. S., Gray, N. D., Tait, K., Hendry, K. R., Hilton, R. G., Henley, S. F., Tessin, A., Leary, P., Papadaki, S., Ford, A., März, C., & Abbott, G. D. (2020). Transformation of organic matter in a Barents Sea sediment profile: coupled geochemical and microbiological processes. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378(2181), https://doi.org/10.1098/rsta.2020.0223

Process-based, mechanistic investigations of organic matter transformation and diagenesis directly beneath the sediment–water interface (SWI) in Arctic continental shelves are vital as these regions are at greatest risk of future change. This is in p... Read More about Transformation of organic matter in a Barents Sea sediment profile: coupled geochemical and microbiological processes.

Benthic-pelagic coupling in the Barents Sea: an integrated data-model framework (2020)
Journal Article
Freitas, F. S., Hendry, K. R., Henley, S. F., Faust, J. C., Tessin, A. C., Stevenson, M. A., Abbott, G. D., März, C., & Arndt, S. (2020). Benthic-pelagic coupling in the Barents Sea: an integrated data-model framework. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378(2181), Article 20190359. https://doi.org/10.1098/rsta.2019.0359

The Barents Sea is experiencing long-term climate-driven changes, e.g. modification in oceanographic conditions and extensive sea ice loss, which can lead to large, yet unquantified disruptions to ecosystem functioning. This key region hosts a large... Read More about Benthic-pelagic coupling in the Barents Sea: an integrated data-model framework.

Exploring the composition of macromolecular organic matter in Arctic Ocean sediments under a changing sea ice gradient (2019)
Journal Article
Stevenson, M. A., & Abbott, G. D. (2019). Exploring the composition of macromolecular organic matter in Arctic Ocean sediments under a changing sea ice gradient. Journal of Analytical and Applied Pyrolysis, 140, 102-111. https://doi.org/10.1016/j.jaap.2019.02.006

Arctic sea ice has been affected by climate change, leading to reductions in summer sea ice extent over the past few decades, impacting nutrient dynamics, ocean temperature fluxes and the biological communities present in the ocean. Marine organic ma... Read More about Exploring the composition of macromolecular organic matter in Arctic Ocean sediments under a changing sea ice gradient.

Determination of geochronology and sedimentation rates of shallow lakes in the middle Yangtze reaches using 210Pb, 137Cs and spheroidal carbonaceous particles (2018)
Journal Article
Chen, X., Qiao, Q., McGowan, S., Zeng, L., Stevenson, M. A., Xu, L., Huang, C., Liang, J., & Cao, Y. (2019). Determination of geochronology and sedimentation rates of shallow lakes in the middle Yangtze reaches using 210Pb, 137Cs and spheroidal carbonaceous particles. CATENA, 174, 546-556. https://doi.org/10.1016/j.catena.2018.11.041

Direct and indirect effects of Holocene climate variations on catchment and lake processes of a treeline lake, SW China (2018)
Journal Article
Chen, X., McGowan, S., Xiao, X., Stevenson, M. A., Yang, X., Li, Y., & Zhang, E. (2018). Direct and indirect effects of Holocene climate variations on catchment and lake processes of a treeline lake, SW China. Palaeogeography, Palaeoclimatology, Palaeoecology, 502, 119-129. https://doi.org/10.1016/j.palaeo.2018.04.027

Sedimentary records of inorganic elements and pigments over the last 12,000 years are used to assess major changes in limnological conditions of Tiancai Lake (a small treeline lake, SW China), in response to Holocene climate variations. Algal communi... Read More about Direct and indirect effects of Holocene climate variations on catchment and lake processes of a treeline lake, SW China.

Diatom distribution in an alpine basin (central China) in relation to environmental factors and substrata (2017)
Journal Article
Chen, X., Stevenson, M. A., Zeng, L., & Qiao, Q. (2017). Diatom distribution in an alpine basin (central China) in relation to environmental factors and substrata. Diatom Research, 32(3), 251-262. https://doi.org/10.1080/0269249x.2017.1371082

This study examines the habitat preferences of diatom species for bogs, ponds and streams, and explores the effects of environmental variables and substrata on diatom distribution in an alpine basin (Dajiuhu Basin, central China). Ponds and streams w... Read More about Diatom distribution in an alpine basin (central China) in relation to environmental factors and substrata.

Variations in diatom communities at genus and species levels in peatlands (central China) linked to microhabitats and environmental factors (2016)
Journal Article
Chen, X., Bu, Z., Stevenson, M. A., Cao, Y., Zeng, L., & Qin, B. (2016). Variations in diatom communities at genus and species levels in peatlands (central China) linked to microhabitats and environmental factors. Science of the Total Environment, 568, 137-146. https://doi.org/10.1016/j.scitotenv.2016.06.015

Peatlands are a specialized type of organic wetlands, fulfilling essential roles as global carbon sinks, headwaters of rivers and biodiversity hotspots. Despite their importance, peatlands are being lost at an alarming rate due to human disturbance a... Read More about Variations in diatom communities at genus and species levels in peatlands (central China) linked to microhabitats and environmental factors.

Impacts of forestry planting on primary production in upland lakes from north-west Ireland (2015)
Journal Article
Stevenson, M. A., McGowan, S., Anderson, N. J., Foy, R. H., Leavitt, P. R., McElarney, Y. R., Engstrom, D. R., & Pla-Rabés, S. (2016). Impacts of forestry planting on primary production in upland lakes from north-west Ireland. Global Change Biology, 22(4), 1490-1504. https://doi.org/10.1111/gcb.13194

Planted forests are increasing in many upland regions worldwide, but knowledge about their potential effects on algal communities of catchment lakes is relatively unknown. Here, the effects of afforestation were investigated using palaeolimnology at... Read More about Impacts of forestry planting on primary production in upland lakes from north-west Ireland.

Acceleration of cyanobacterial dominance in north temperate-subarctic lakes during the Anthropocene (2015)
Journal Article
Taranu, Z. E., Gregory-Eaves, I., Leavitt, P. R., Bunting, L., Buchaca, T., Catalan, J., Domaizon, I., Guilizzoni, P., Lami, A., McGowan, S., Moorhouse, H., Morabito, G., Pick, F. R., Stevenson, M. A., Thompson, P. L., & Vinebrooke, R. D. (2015). Acceleration of cyanobacterial dominance in north temperate-subarctic lakes during the Anthropocene. Ecology Letters, 18(4), 375-384. https://doi.org/10.1111/ele.12420

Increases in atmospheric temperature and nutrients from land are thought to be promoting the expansion of harmful cyanobacteria in lakes worldwide, yet to date there has been no quantitative synthesis of long-term trends. To test whether cyanobacteri... Read More about Acceleration of cyanobacterial dominance in north temperate-subarctic lakes during the Anthropocene.