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Articoli di riviste sul tema "Palaeophytogeography"

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Autore: Grafiati
Pubblicato: 22 giugno 2024

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1

Shukla, Anumeha, R. C. Mehrotra e J. S. Guleria. "Palaeophytogeography of Eucalyptus L’ H’erit: New fossil evidences". Journal of the Geological Society of India 84, n. 6 (dicembre 2014): 693–700. http://dx.doi.org/10.1007/s12594-014-0180-5.

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2

Wellman, Charles H., Philippe Steemans e Marco Vecoli. "Chapter 29 Palaeophytogeography of Ordovician–Silurian land plants". Geological Society, London, Memoirs 38, n. 1 (2013): 461–76. http://dx.doi.org/10.1144/m38.29.

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3

Srivastava, Pradeep Chandra. "Some aspects of Palaeozoic pteridophytes of India: A critical reappraisal". Journal of Palaeosciences 57, n. (1-3) (31 dicembre 2008): 119–39. http://dx.doi.org/10.54991/jop.2008.232.

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Abstract (sommario):
The present paper deals with spatial and temporal distribution of pteridophytic megafossils within Palaeozoic plant bearing horizons of India. An attempt has been made to describe the pteridophytic assemblages in various strata of different ages, dynamism of the relative dominance pattern of various types of pteridophytes within each assemblage vis-Ã -vis the environment they lived in. Critical discussion has been done regarding increasing diversity of Palaeozoic pteridophytic taxa, taxonomic riddles, plant architecture, ecological analysis and phylogenetic implications. Special attention has been given to the floristic regionalism of Lower Carboniferous flora of India in reference to the world palaeophytogeography and occurrence of admixture of Cathaysian, Euramerian and Gondwana pteridophytic elements in palaeoecotone zone near the northwestern boundary of Indian Gondwana Plate.
4

Ziqiang, Wang. "Palaeovegetation and plate tectonics: palaeophytogeography of North China during permian and triassic times". Palaeogeography, Palaeoclimatology, Palaeoecology 49, n. 1-2 (gennaio 1985): 25–45. http://dx.doi.org/10.1016/0031-0182(85)90003-3.

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5

KIMURA, Tatsuaki, Tamiko OHANA, Yutaka KURIHARA e Kazuo KOMORI. "Middle Jurassic Utano flora and its significance for biostratigraphy and palaeophytogeography in East Asia (abstract)." Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences 62, n. 9 (1986): 341–44. http://dx.doi.org/10.2183/pjab.62.341.

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6

Richard, Pierre J. H. "Postglacial palaeophytogeography of the eastern St. Lawrence River Watershed and the climatic signal of the pollen record". Palaeogeography, Palaeoclimatology, Palaeoecology 109, n. 2-4 (giugno 1994): 137–61. http://dx.doi.org/10.1016/0031-0182(94)90173-2.

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7

Wellman, Charles H. "Palaeoecology and palaeophytogeography of the Rhynie chert plants: evidence from integrated analysis of in situ and dispersed spores". Proceedings of the Royal Society of London. Series B: Biological Sciences 271, n. 1542 (7 maggio 2004): 985–92. http://dx.doi.org/10.1098/rspb.2004.2686.

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8

Wellman, Charles H. "Palaeoecology and palaeophytogeography of the Rhynie chert plants: further evidence from integrated analysis of in situ and dispersed spores". Philosophical Transactions of the Royal Society B: Biological Sciences 373, n. 1739 (18 dicembre 2017): 20160491. http://dx.doi.org/10.1098/rstb.2016.0491.

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Abstract (sommario):
The remarkably preserved Rhynie chert plants remain pivotal to our understanding of early land plants. The extraordinary anatomical detail they preserve is a consequence of exceptional preservation, by silicification, in the hot-springs environment they inhabited. However, this has prompted questions as to just how typical of early land plants the Rhynie chert plants really are. Some have suggested that they were highly adapted to the unusual hot-springs environment and are unrepresentative of ‘normal’ plants of the regional flora. New quantitative analysis of dispersed spore assemblages from the stratigraphical sequence of the Rhynie outlier, coupled with characterization of the in situ spores of the Rhynie chert plants, permits investigation of their palaeoecology and palaeophytogeography. It is shown that the Rhynie inland intermontane basin harboured a relatively diverse flora with only a small proportion of these plants actually inhabiting the hot-springs environment. However, the flora of the Rhynie basin differed from coeval lowland floodplain deposits on the same continent, as it was less diverse, lacked some important spore groups and contained some unique elements. At least some of the Rhynie plants (e.g. Horneophyton lignieri ) existed outside the hot-springs environment, inhabiting the wider basin, and were indeed palaeogeographically widespread. They probably existed in the hot-springs environment because they were preadapted to this unstable and harsh setting. This article is part of a discussion meeting issue ‘The Rhynie cherts: our earliest terrestrial ecosystem revisited’.
9

Zhou, Yu-Xing. "Earliest pollen-dominated microfloras from the early late carboniferous of the Tian Shan Mountains, NW China: their significance for the origin of conifers and palaeophytogeography". Review of Palaeobotany and Palynology 81, n. 2-4 (maggio 1994): 193–211. http://dx.doi.org/10.1016/0034-6667(94)90108-2.

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10

Ge, Sun. "On Late Triassic Floras in China and Principles for Palaeophytogeographic Regionalization". Acta Geologica Sinica-English 61, n. 1 (29 maggio 2009): 1–10. http://dx.doi.org/10.1111/j.1755-6724.1987.mp61001001.x.

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11

BREUER, PIERRE, LUDOVIC STRICANNE e PHILIPPE STEEMANS. "Morphometric analysis of proposed evolutionary lineages of Early Devonian land plant spores". Geological Magazine 142, n. 3 (maggio 2005): 241–53. http://dx.doi.org/10.1017/s001675680500049x.

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Abstract (sommario):
Early Devonian miospore assemblages from ‘La Gileppe’ (Eastern Belgium) include five varieties of trilete spore belonging to the genus Emphanisporites. These five varieties show a continuous variation of their morphological characteristics. The variation in morphological characteristics can be related to the evolution of morphological features and allows us to define the Emphanisporites micrornatus Morphon. A statistical evaluation of this population highlights the interdependence of almost all morphological parameters. This study proves the increase in size of ornamental and structural parameters over several million years. The biometric changes and the progressive replacement of older morphotypes by younger ones indicate that a temporal link exists between these different varieties. Two phylogenetic hypotheses for the E. micrornatus Morphon are proposed. This morphological evolution is so far observed only on the Eastern Old Red Sandstone Continent and defines a palaeophytogeographic sinuosus–zavallatus Province.
12

SHUKLA, Anumeha, e Rakesh Chandra MEHROTRA. "Cenozoic flora of western India and its significance in palaeoclimatic and palaeophytogeographic interpretation". Chinese Science Bulletin 58, S1 (1 gennaio 2013): 134–41. http://dx.doi.org/10.1360/0023-074x2013-58-s1-134.

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13

Vecoli, Marco, Aurélien Delabroye, Amalia Spina e Olle Hints. "Cryptospore assemblages from Upper Ordovician (Katian–Hirnantian) strata of Anticosti Island, Québec, Canada, and Estonia: Palaeophytogeographic and palaeoclimatic implications". Review of Palaeobotany and Palynology 166, n. 1-2 (luglio 2011): 76–93. http://dx.doi.org/10.1016/j.revpalbo.2011.05.006.

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14

Ghavidel-Syooki, Mohammad. "Cryptospore and trilete spore assemblages from the Late Ordovician (Katian–Hirnantian) Ghelli Formation, Alborz Mountain Range, Northeastern Iran: Palaeophytogeographic and palaeoclimatic implications". Review of Palaeobotany and Palynology 231 (agosto 2016): 48–71. http://dx.doi.org/10.1016/j.revpalbo.2016.04.006.

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15

Ghavidel-Syooki, Mohammad. "Cryptospore and trilete spore assemblages from the Late Ordovician (Katian–Hirnantian) Ghelli Formation, Alborz Mountain Range, Northeastern Iran: Palaeophytogeographic and palaeoclimatic implications". Review of Palaeobotany and Palynology 244 (settembre 2017): 217–40. http://dx.doi.org/10.1016/j.revpalbo.2017.05.010.

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16

Capel, Eliott, Christopher J. Cleal, Thomas Servais e Borja Cascales-Miñana. "New insights into Silurian–Devonian palaeophytogeography". Palaeogeography, Palaeoclimatology, Palaeoecology, gennaio 2023, 111393. http://dx.doi.org/10.1016/j.palaeo.2023.111393.

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17

"Cretaceous phytogeography and climate signals". Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 341, n. 1297 (28 agosto 1993): 277–86. http://dx.doi.org/10.1098/rstb.1993.0113.

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Abstract (sommario):
We address two aspects of Cretaceous plants and climate. Firstly, we briefly characterize Cretaceous global phytogeography and review some quantitative tem perature estimates derived from plants. Secondly, by adopting a multivariate statistical approach to palaeophytogeographic mapping, we examine the effect of the rise in diversity and ecological radiation of angiosperms on the climate signal offered by non-angiosperms. In the Cretaceous, plant productivity was concentrated at middle and high latitudes. Polar cool temperate rain forests in coastal areas, where winter temperatures were ameliorated by the proximity of the ocean, were conifer-dominated and deciduous. In more continental high latitudes, winter temperatures probably fell well below freezing, thermally depressing metabolic rates and allowing some plants to retain their leaves year round. However, this ‘evergreenness’ necessitated desiccation resistance in the form of reduced leaf size and thick cuticles. At mid latitudes, open canopy woodlands and forests were dominated by a mixture of microphyllous conifers, moderately xeromorphic ferns, cycadophytes, pteridosperms and sphenophytes. Late Cretaceous broadleaved coriaceous angiosperms were mostly subordinate shrubs and small trees. Large angiosperm trees were comparatively rare. Although the evidence is meagre, low latitude vegetation tended to be xeromorphic and only patchily forested. Tropical everwet vegetation was, if present at all, highly restricted and consequently not understood. Non-angiosperms exhibit a weak, poorly differentiated phytogeographic pattern linked most strongly to the evaporatiom precipitation ratio. This relationship is reflected in foliar physiognomy, and was established long before the Cretaceous. As the advent of the angiosperms did not significantly alter this relationship, it may be possible to calibrate the non-angiosperms of the Mesozoic using the physiognomic techniques developed for woody dicots. Taxonomy independent of political and stratigraphic boundaries is essential in order to satisfactorily reconstruct palaeophytogeography and derivative climatic signals, as are non-selective reporting of floral composition and detailed descriptions of plant physiognomy. Without this basic information the full potential of the plant fossil record to reveal past climate and environmental change cannot be exploited.

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