Zobrazeno 1 - 10
of 15
pro vyhledávání: '"David C. Steart"'
Autor:
David C. Steart, Alan R.T. Spencer, Russell J. Garwood, Jason Hilton, Martin C. Munt, John Needham, Paul Kenrick
Publikováno v:
PeerJ, Vol 2, p e624 (2014)
We document a new species of ovulate cone (Pararaucaria collinsonae) on the basis of silicified fossils from the Late Jurassic Purbeck Limestone Group of southern England (Tithonian Stage: ca. 145 million years). Our description principally relies on
Externí odkaz:
https://doaj.org/article/83bacd60cfc044749a879cff731f01b4
Autor:
David C. Steart, John Needham, Christine Strullu-Derrien, Marc Philippe, Jonathan Krieger, Lil Stevens, Alan R. T. Spencer, Peta A. Hayes, Paul Kenrick
Publikováno v:
Botany Letters. 170:165-182
Autor:
David C. Steart, Norman MacLeod
Publikováno v:
Paleobiology. 41:528-553
Research into the relationship between leaf form and climate over the last century has revealed that, in many species, the sizes and shapes of leaf characters exhibit highly structured and predictable patterns of variation in response to the local cl
Autor:
Rakesh C. Mehrotra, Paul J. Valdes, Robert A. Spicer, Tao Su, Gaurav Srivastava, Zhe-Kun Zhou, Frédéric M.B. Jacques, Jian Yang, Teresa E.V. Spicer, Nan Crystal Arens, David C. Steart, Elizabeth M. Kennedy, Naresh C. Mehrotra, Alexei B. Herman, Jiangshan Lai
Publikováno v:
Global Ecology and Biogeography. 24:1113-1125
Aim Early in their evolution, angiosperms evolved a diversity of leaf form far greater than that of any other group of land plants. Some of this diversity evolved in response to varying climate. Our aim is to test the global relationship between leaf
Publikováno v:
Review of Palaeobotany and Palynology. 162:607-620
Leaves from 24 South African vegetation sites, including 3 Fynbos sites, exhibiting high levels of endemism, were assessed by both LMA (Leaf Margin Analysis) and CLAMP (Climate Leaf Multivariate Program) to determine the effect of endemism on these p
Publikováno v:
Palaeobiodiversity and Palaeoenvironments. 90:99-110
The role that climate plays in influencing the physiognomy of modern and fossil plant communities is widely acknowledged and forms the basis for several palaeoclimate proxies. In this work, both univariate Leaf Margin Analysis and multivariate Climat
Publikováno v:
Review of Palaeobotany and Palynology. 157:358-374
The decay rate of leaves of five Australian tree species, Acacia melanoxylon R. Br., Atherosperma moschatum Labill., Eucalyptus regnans F.Muell., Lomatia fraseri and Nothofagus cunninghamii (Hook.) Oerst., was quantified to determine whether differen
Autor:
Ian J. Glasspool, David C. Steart, Lynn O. Allen, Andrew C. Scott, Margaret E. Collinson, Guy J. Harrington, Jerry J. Hooker, Sharon J. Gibbons
Publikováno v:
Grana. 48:38-66
A high‐resolution palynological study is undertaken through the Cobham Lignite Bed (Cobham, Kent, UK) to investigate vegetation response to the rapid climate warming at the onset of the Paleocene‐Eocene thermal maximum (PETM). The lower laminated
Autor:
Nathalie Grassineau, Andrew C. Scott, David C. Steart, Sharon J. Gibbons, Margaret E. Collinson, Laura C. McParland
Publikováno v:
PALAIOS. 22:528-538
We report the effects of charring on the ferns Osmunda, Pteridium, and Matteucia with coniferous wood (Sequoia) for comparison. Like charred wood, charred ferns shrink, become black and brittle with a silky sheen, and retain three-dimensional cellula
Publikováno v:
Journal of the Geological Society, 164 (1)
Qualitative and quantitative coal petrological analyses have been undertaken on the laminated lignite at the base of the Cobham Lignite Bed, from Scalers Hill, Kent, England. The maximum negative carbon isotope excursion, which marks the beginning of