Search Results - "FRASER, WESLEY T."

Rapid determination of spore chemistry using thermochemolysis gas chromatography-mass spectrometry and micro-Fourier transform infrared spectroscopy by Watson, Jonathan S, Sephton, Mark A, Sephton, Sarah V, Self, Stephen, Fraser, Wesley T, Lomax, Barry H, Gilmour, Iain, Wellman, Charles H, Beerling, David J

“…Spore chemistry is at the centre of investigations aimed at producing a proxy record of harmful ultraviolet radiation (UV-B) through time. A biochemical proxy…”
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Proxy reconstruction of ultraviolet-B irradiance at the Earth’s surface, and its relationship with solar activity and ozone thickness by Jardine, Phillip E, Fraser, Wesley T, Gosling, William D, Roberts, C Neil, Eastwood, Warren J, Lomax, Barry H

“…Solar ultraviolet-B (UV-B) irradiance that reaches the Earth’s surface acts as a biotic stressor and has the potential to modify ecological and environmental…”
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Uncovering a phylogenetic signal in plant biopolymer chemistry: a comparison of sporopollenin isolation approaches for use in palynological research by Jardine, Phillip E., Kent, Matthew S., Fraser, Wesley T., Knorr, Klaus‐Holger, Lomax, Barry H.

“…Sporomorphs (pollen and spores) are a mainstay of research into past vegetation, and increasingly sporomorph chemistry is being used as a palaeoecological…”
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Emission of methane, carbon monoxide, carbon dioxide and short‐chain hydrocarbons from vegetation foliage under ultraviolet irradiation by FRASER, WESLEY T., BLEI, EMANUEL, FRY, STEPHEN C., NEWMAN, MARK F., REAY, DAVID S., SMITH, KEITH A., MCLEOD, ANDY R.

“…The original report that plants emit methane (CH4) under aerobic conditions caused much debate and controversy. Critics questioned experimental techniques,…”
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Palaeoproxies: botanical monitors and recorders of atmospheric change by Lomax, Barry H., Fraser, Wesley T., Smith, Andrew

“…The integration of plant and Earth sciences offers the opportunity to develop and test palaeobotanical monitors and recorders (palaeoproxies) of past…”
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Formation of a polyalkyl macromolecule from the hydrolysable component within sporopollenin during heating/pyrolysis experiments with Lycopodium spores by Watson, Jonathan S., Fraser, Wesley T., Sephton, Mark A.

“…► Lycopodium spores were artificially matured to simulated diagentic changes in sporopollenin chemistry. ► Following simulated maturation, spores were analysed…”
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Pollen-vegetation richness and diversity relationships in the tropics by Gosling, William D., Julier, Adele C. M., Adu-Bredu, Stephen, Djagbletey, Gloria D., Fraser, Wesley T., Jardine, Phillip E., Lomax, Barry H., Malhi, Yadvinder, Manu, Emmanuel A., Mayle, Francis E., Moore, Sam

“…Tracking changes in biodiversity through time requires an understanding of the relationship between modern diversity and how this diversity is preserved in the…”
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Pollen and spores as biological recorders of past ultraviolet irradiance by Jardine, Phillip E., Fraser, Wesley T., Lomax, Barry H., Sephton, Mark A., Shanahan, Timothy M., Miller, Charlotte S., Gosling, William D.

“…Solar ultraviolet (UV) irradiance is a key driver of climatic and biotic change. Ultraviolet irradiance modulates stratospheric warming and ozone production,…”
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Response to Comment on “Dying in the Sun: Direct evidence for elevated UV-B radiation at the end-Permian mass extinction” by Jardine, Phillip E., Peng, Huiping, Marshall, John E. A., Lomax, Barry H., Bomfleur, Benjamin, Kent, Matthew S., Fraser, Wesley T., Liu, Feng

“…Seddon and Zimmermann have raised questions about the evidence for increased UV-B flux across the end-Permian mass extinction (EPME) that was presented in our…”
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Sporopollenin chemistry and its durability in the geological record: an integration of extant and fossil chemical data across the seed plants by Jardine, Phillip E., Hoorn, Carina, Beer, Maxine A.M., Barbolini, Natasha, Woutersen, Amber, Bogota‐Angel, Giovanni, Gosling, William D., Fraser, Wesley T., Lomax, Barry H., Huang, Huasheng, Sciumbata, Matteo, He, Huajie, Dupont‐Nivet, Guillaume, Kustatscher, Evelyn

“…Sporopollenin is a highly resistant biopolymer that forms the outer wall of pollen and spores (sporomorphs). Recent research into sporopollenin chemistry has…”
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Dying in the Sun: Direct evidence for elevated UV-B radiation at the end-Permian mass extinction by Liu, Feng, Peng, Huiping, Marshall, John E A, Lomax, Barry H, Bomfleur, Benjamin, Kent, Matthew S, Fraser, Wesley T, Jardine, Phillip E

“…Land plants can adjust the concentration of protective ultraviolet B (UV-B)-absorbing compounds (UACs) in the outer wall of their reproductive propagules in…”
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Ginkgo leaf cuticle chemistry across changing pCO2 regimes by Jardine, Phillip E., Kent, Matthew, Fraser, Wesley T., Lomax, Barry H.

“…Cuticles have been a key part of palaeobotanical research since the mid-19th Century. Recently, cuticular research has moved beyond morphological traits to…”
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A novel palaeoaltimetry proxy based on spore and pollen wall chemistry by Lomax, Barry H., Fraser, Wesley T., Harrington, Guy, Blackmore, Stephen, Sephton, Mark A., Harris, Nigel B.W.

“…Understanding the uplift history and the evolution of high altitude plateaux is of major interest to a wide range of geoscientists and has implications for…”
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Chemotaxonomy of domesticated grasses: a pathway to understanding the origins of agriculture by Jardine, Phillip E., Gosling, William D., Lomax, Barry H., Julier, Adele C. M., Fraser, Wesley T.

“…The grass family (Poaceae) is one of the most economically important plant groups in the world today. In particular many major food crops, including rice,…”
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The Modern Pollen-Vegetation Relationships of a Tropical Forest-Savannah Mosaic Landscape, Ghana, West Africa by Julier, Adele C.M, Jardine, Phillip E, Adu-Bredu, Stephen, Coe, Angela L, Duah-Gyamfi, Akwasi, Fraser, Wesley T, Lomax, Barry H, Malhi, Yadvinder, Moore, Sam, Owusu-Afriyie, Kennedy, Gosling, William D

“…Transitions between forest and savannah vegetation types in fossil pollen records are often poorly understood due to over-production by taxa such as Poaceae…”
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Plant spore walls as a record of long-term changes in ultraviolet-B radiation by Lomax, Barry H, Fraser, Wesley T, Sephton, Mark A, Callaghan, Terry V, Self, Stephen, Harfoot, Michael, Pyle, John A, Wellman, Charles H, Beerling, David J

“…Stratospheric ozone screens the Earth's surface from harmful ultraviolet-B radiation. Concentrations of stratospheric ozone are governed by a variety of…”
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Variability in modern pollen rain from moist and wet tropical forest plots in Ghana, West Africa by Julier, Adele C. M., Jardine, Phillip E., Adu-Bredu, Stephen, Coe, Angela L., Fraser, Wesley T., Lomax, Barry H., Malhi, Yadvinder, Moore, Sam, Gosling, William D.

“…How pollen moves within and between ecosystems affects factors such as the genetic structure of populations, how resilient they are to environmental change,…”
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UV-B absorbing pigments in spores: biochemical responses to shade in a high-latitude birch forest and implications for sporopollenin-based proxies of past environmental change by Fraser, Wesley T., Sephton, Mark A., Watson, Jonathan S., Self, Stephen, Lomax, Barry H., James, David I., Wellman, Charles H., Callaghan, Terry V., Beerling, David J.

“…Current attempts to develop a proxy for Earth's surface ultraviolet-B (UV-B) flux focus on the organic chemistry of pollen and spores because their constituent…”
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Stratigraphic completeness and resolution in an ancient mudrock succession by Kemp, David B., Fraser, Wesley T., Izumi, Kentaro, Manville, Vern

“…Mudrocks are the most common rock type at the Earth's surface, and they play a major role in informing current understanding of the palaeoenvironmental history…”
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Experimental determination of Li isotope behaviour during basalt weathering by Pogge von Strandmann, Philip A.E., Fraser, Wesley T., Hammond, Samantha J., Tarbuck, Gary, Wood, Ian G., Oelkers, Eric H., Murphy, Melissa J.

“…Silicate weathering is the primary control of atmospheric CO2 concentrations on multiple timescales. However, tracing this process has proven difficult…”
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