Zobrazeno 1 - 10 of 63 pro vyhledávání: '"J L, Olsen"'
1
Akademický článek
Does EO NDVI seasonal metrics capture variations in species composition and biomass due to grazing in semi-arid grassland savannas?
Autor: J. L. Olsen, S. Miehe, P. Ceccato, R. Fensholt
Publikováno v: Biogeosciences, Vol 12, Iss 14, Pp 4407-4419 (2015)
Most regional scale studies of vegetation in the Sahel have been based on Earth observation (EO) imagery due to the limited number of sites providing continuous and long term in situ meteorological and vegetation measurements. From a long time series
Externí odkaz: https://doaj.org/article/b425e998b3fc4091ad1c5dc72d6e697e
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2
Akademický článek
Pre-zygotic isolation in the macroalgal genus Fucus from four contact zones spanning 100–10 000 years: a tale of reinforcement?
Autor: G. Hoarau, J. A. Coyer, M. C. W. G. Giesbers, A. Jueterbock, J. L. Olsen
Publikováno v: Royal Society Open Science, Vol 2, Iss 2 (2015)
Hybrid zones provide an ideal natural experiment to study the selective forces driving evolution of reproductive barriers and speciation. If hybrid offspring are less fit than the parental species, pre-zygotic isolating barriers can evolve and streng
Externí odkaz: https://doaj.org/article/81039bd3a6524313b400b25a7a4ad240
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5
Deep-water green algae from the Bahamas, including Cladophora vandenhoekii sp. nov. (Cladophorales)
Autor: James N. Norris, J. L. Olsen
Publikováno v: Phycologia. 30:315-328
Studies on deep-water green algae (Chlorophyta) collected using the submersible Johnson-sea-Link I off San Salvador Island, Bahamas, revealed species belonging to the Cladophorales, Siphonocladales and Bryopsidales. All were either siphonous or giant
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8b950c7224e4d53b4069b5ae3ed454e2
https://doi.org/10.2216/i0031-8884-30-4-315.1
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6
Geographically specific heteroplasmy of mitochondrial DNA in the seaweed, Fucus serratus (Heterokontophyta: Phaeophyceae, Fucales)
Autor: J A, Coyer, G, Hoarau, W T, Stam, J L, Olsen
Publikováno v: Molecular ecology. 13(5)
The presence of more than one type of mitochondrial DNA within the same organism (mtDNA heteroplasmy) has been reported in vertebrates, invertebrates, basidiomycetes and some angiosperms, but never in marine (macro)algae. We examined sequence differe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::147b19f89db1969e7d5504b824140e8b
https://pubmed.ncbi.nlm.nih.gov/15078467
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7
Polymerase chain reaction-single strand conformation polymorphism analyses of nuclear and chloroplast DNA provide evidence for recombination, multiple introductions and nascent speciation in the Caulerpa taxifolia complex
Autor: I, Meusnier, M, Valero, C, Destombe, C, Godé, E, Desmarais, F, Bonhomme, W T, Stam, J L, Olsen
Publikováno v: Molecular ecology. 11(11)
Independent lines of evidence support an Australian origin for the Mediterranean populations of the tropical alga Caulerpa taxifolia. To complement previous biogeographical studies based on nuclear rDNA internal transcribed spacer (ITS), a new chloro
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::a1d0e224ca52601bca750cfe63959a1e
https://pubmed.ncbi.nlm.nih.gov/12406242
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8
Phylogenetic analyses of Caulerpa taxifolia (Chlorophyta) and of its associated bacterial microflora provide clues to the origin of the Mediterranean introduction
Autor: I, Meusnier, J L, Olsen, W T, Stam, C, Destombe, M, Valero
Publikováno v: Molecular ecology. 10(4)
The accidental introduction of Caulerpa taxifolia into the Mediterranean is no longer under dispute. What has eluded researchers until now, is definitive evidence for the original, biogeographical source population. Here we present two independent li
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::37d463ada6a1786bf3cb331913836088
https://pubmed.ncbi.nlm.nih.gov/11348502
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9
The Cladophora complex (Chlorophyta): new views based on 18S rRNA gene sequences
Autor: F T, Bakker, J L, Olsen, W T, Stam, C, van den Hoek
Publikováno v: Molecular phylogenetics and evolution. 3(4)
Evolutionary relationships among species traditionally ascribed to the Siphonocladales/Cladophorales have remained unclear due to a lack of phylogenetically informative characters and extensive morphological plasticity resulting in morphological conv
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::1b514dc4e7cd4cd83f34693dd097065c
https://pubmed.ncbi.nlm.nih.gov/7697194
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10
Mendelssohn and Superfluid Helium Film Work at the Clarendon Laboratory
Autor: J. L. Olsen
Publikováno v: Advances in Cryogenic Engineering ISBN: 9781461279044
In 1933 liquid helium was only available in Leiden, Toronto, Berlin, and Breslau. No helium liquefier existed in England though building of a new laboratory which would include such a liquefier had begun in Cambridge in 1930. Oxford had nothing of th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb52998f0d1a03965197b83f2322ee44
https://doi.org/10.1007/978-1-4613-0639-9_5
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