scholarly journals Remote tropical island colonization does not preclude symbiotic specialists: new evidence of mycorrhizal specificity across the geographic distribution of the Hawaiian endemic orchidAnoectochilus sandvicensis

2018 ◽  
Vol 123 (4) ◽  
pp. 657-666 ◽  
Author(s):  
Sean Swift ◽  
Sherilyn Munroe ◽  
Chaewon Im ◽  
Laura Tipton ◽  
Nicole A Hynson
Keyword(s):  
Geographic Distribution ◽  
Tropical Island ◽  
Island Colonization ◽  
Mycorrhizal Specificity ◽  
New Evidence

scholarly journals New Evidence from the East Polynesian Gateway: Substantive and Methodological Results from Aitutaki, Southern Cook Islands

Radiocarbon ◽  
2007 ◽  
Vol 49 (3) ◽  
pp. 1163-1179 ◽  
Author(s):  
Melinda S Allen ◽  
Rod Wallace
Keyword(s):  
New Age ◽  
Tropical Pacific ◽  
Human Settlements ◽  
Radiocarbon Dates ◽  
Cook Islands ◽  
Island Colonization ◽  
Settlement Period ◽  
Biological Evidence ◽  
New Evidence

East Polynesia was the geographic terminus of prehistoric human expansion across the globe and the southern Cook Islands, the first archipelago west of Samoa, a gateway to this region. Fourteen new radiocarbon dates from one of the oldest human settlements in this archipelago, the Ureia site (AIT-10) on Aitutaki Island, now indicate occupation from cal AD 1225–1430 (1σ), nearly 300 yr later than previously suggested. Although now among the most securely dated central East Polynesian sites, the new age estimate for Ureia places it outside the settlement period of either the long or short chronology models. The new dates have, however, led to a comfortable fit with the Ureia biological evidence, which suggests not a virgin landscape, but a highly a modified fauna and flora. The results also provide the first systematic demonstration of inbuilt age in tropical Pacific trees, a finding that may explain widely divergent 14C results from several early East Polynesian sites and has implications for the dating of both island colonization and subsequent intra-island dispersals.

Variation in Callistemon viminalis (Myrtaceae): New evidence from leaf essential oils

1997 ◽  
Vol 10 (1) ◽  
pp. 1 ◽  
Author(s):  
Joseph J. Brophy ◽  
Paul I. Forster ◽  
Robert J. Goldsack ◽  
D. Brynn Hibbert ◽  
Acharaporn Punruckvong
Keyword(s):  
Essential Oils ◽  
Least Squares ◽  
Partial Least Squares ◽  
Geographic Distribution ◽  
Partial Least Squares Analysis ◽  
Infraspecific Taxa ◽  
Leaf Oil ◽  
Callistemon Viminalis ◽  
New Evidence ◽  
Wide Geographic Distribution

Analysis of leaf essential oils in Callistemon viminalis (Sol. ex Gaertner) G.Don ex Loudon was used to determine the validity of infraspecific taxa recognised in the taxon. The leaf essential oils obtained, in 0.08–0.63% yield, have been found to be qualitatively similar over the wide geographic distribution of the species (from 12°28′S to 29°43′S) but to differ quantitatively over this range. All oils contained α-pinene, β-pinene, myrcene and 1,8-cineole as their major compounds and traces of the β-triketones, leptospermone and flavesone. Overall the essential oils that contained the most 1,8-cineole (60–82%) came from the more southern latitudes (29°14′S to 20°16′S) while those oils with less 1,8-cineole (0.5–47%) came from the more northerly latitudes (12°53′S to 25°18′S). There was overlap in the region 25° S to 22° S, although the majority of samples from this region contained high 1,8-cineole values. Partial least squares analysis allowed the latitude to be calibrated by the leaf oil concentrations. These data would lend only equivocal support for the establishment of two intraspecific taxa of C. viminalis.

Triassic sponges (Sphinctozoa) from Hells Canyon, Oregon

1988 ◽  
Vol 62 (03) ◽  
pp. 419-423 ◽  
Author(s):  
Baba Senowbari-Daryan ◽  
George D. Stanley
Keyword(s):  
Endemic Species ◽  
Upper Triassic ◽  
Island Arc ◽  
Tropical Island ◽  
The Family ◽  
Wallowa Terrane ◽  
Unique Condition ◽  
Hells Canyon

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.

Systematic effects in observed parallaxes

1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson
Keyword(s):  
Error Estimates ◽  
Zero Point ◽  
Absolute Zero ◽  
Apparent Magnitude ◽  
Coherent System ◽  
Preliminary Results ◽  
General Catalogue ◽  
Systematic Effects ◽  
New Evidence ◽  
Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

MERLIN Finds New Evidence of Ranolazine Safety

2007 ◽  
Vol 40 (9) ◽  
pp. 36
Author(s):  
BRUCE JANCIN
Keyword(s):  
New Evidence

Vaccination for travellers – new evidence and recommendations

2001 ◽  
Vol 58 (6) ◽  
pp. 362-366 ◽  
Author(s):  
Matius P. Stürchler ◽  
R. P. Steffen
Keyword(s):  
Hepatitis B ◽  
Hepatitis A ◽  
New Evidence

Impfungen sind einfache und effektive Maßnahmen zur Verhinderung von Reisekrankheiten. Compliance-Probleme sind gering, da alle Impfungen noch vor Abreise verabreicht werden und bei manchen Impfungen nur eine Dosis für den zuverlässigen Schutz nötig ist. Für jeden Reisenden sind die Hepatitis A- und die Diphtherie-Tetanus-Impfung empfohlen, für Asien und Afrika auch die Polioimpfung. Bei Reisen >30 Tagen, jüngeren Personen und Reisenden mit Risikoverhalten sollte immer auch eine Hepatitis B-Impfung, eventuell als Kombination mit Hepatitis A in Betracht gezogen werden. Je nach Reisestil, -destination und -dauer können auch weitere Impfungen wie z.B. die Typhus-, Tollwut-, Zeckenenzephalitis-, Grippe-, Masern-Mumps-Röteln-, Gelbfieber-, Meningokokkenmeningitis- und die Japanische Enzephalitis-Impfung in Frage kommen. Mehrere Impfungen können gleichzeitig verabreicht werden – eine Staffelung ist nicht nötig. i BAG Supplementum VI, Stand Juli 2000 «Impfungen für Auslandreisende»; http://www.admin.ch/bag/infekt/prev/reisemed/index.htm; Safetravel http://www.safetravel.ch; Tropimed

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