scholarly journals Identification of a Marine Green Alga Percursaria percursa from Hypersaline Springs in the Middle of the North American Continent

2005 ◽  
Vol 119 (1) ◽  
pp. 82 ◽  
Author(s):  
Kathleen L. Londry ◽  
Pascal H. Badiou ◽  
Stephen E. Grasby
Keyword(s):  
Green Alga ◽  
Microbial Mat ◽  
American Continent ◽  
North American Continent ◽  
The North ◽  
Western Shore ◽  
Dominant Member ◽  
Hypersaline Springs ◽  
First Time ◽  
North Western

The chlorophycean alga Percursaria percursa (Ulvaceae, Ulvales, Chlorophyceae), typical of marine inter-tidal zones, is reported for the first time from hypersaline springs located along the north-western shore of Lake Winnipegosis in Manitoba. Although not usually found inland, P. percursa is the dominant member of microbial mat communities that thrive in shallow pools at the outlets of hypersaline springs.

scholarly journals The first record of Stelidota geminata (Say, 1825) (Coleoptera, Nitidulidae) in Romania

2019 ◽  
Vol 62 (1) ◽  
pp. 57-60
Author(s):  
Melanya Stan
Keyword(s):  
North American ◽  
Near East ◽  
First Record ◽  
American Continent ◽  
Sap Beetle ◽  
Oriental Region ◽  
North American Continent ◽  
The North ◽  
Stelidota Geminata ◽  
First Time

The sap beetle, Stelidota geminata (Say, 1825) originates from the North American continent and was introduced in Europe, Oriental Region and in the Near East. It is recorded from Romania for the first time.

scholarly journals Latent Heat Nudging in the Canadian Regional Deterministic Prediction System

2018 ◽  
Vol 146 (12) ◽  
pp. 3995-4014 ◽  
Author(s):  
Dominik Jacques ◽  
Daniel Michelson ◽  
Jean-François Caron ◽  
Luc Fillion
Keyword(s):  
Latent Heat ◽  
Radar Data ◽  
Positive Influence ◽  
Lead Times ◽  
Prediction System ◽  
Aircraft Measurements ◽  
American Continent ◽  
North American Continent ◽  
The North ◽  
First Time

Abstract This study reports on the progress toward operational weather radar data assimilation in Canada. As a first step, the latent heat nudging (LHN) technique has been tested for a period of 1 month. It is the first time that LHN is used across the North American continent, a domain significantly larger than that of other LHN studies. Other novel aspects of this study include the use of a quality index associated with individual reflectivity measurements and a discussion on matching the effective resolution of the modeled precipitation for a reduction of the representation errors. Various verification scores indicate that LHN has a positive influence on instantaneous precipitation rates for lead times up to 3 h. In comparison, the nowcasting of precipitation rates by a simple Lagrangian extrapolation method yields improvements that last up to approximately 4 h. Verifications against aircraft measurements indicate small but statistically significant improvements throughout the troposphere for lead times up to 24 h.

scholarly journals Q fever in South Australia: an outbreak in a meat-works

1962 ◽  
Vol 60 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Margaret D. Beech ◽  
A. E. Duxbury ◽  
Peter Warner
Keyword(s):  
Q Fever ◽  
South Australia ◽  
Meteorological Conditions ◽  
American Continent ◽  
North American Continent ◽  
The Past ◽  
The North ◽  
Epidemiological Features ◽  
Very High ◽  
Abattoir Workers

This paper consists of an epidemiological study of 52 cases of Q fever occurring in metropolitan Adelaide in 1957 and also a description of the results of a survey of 516 sera obtained from abattoir workers.The only case occurring outside the abattoirs was a dairy farmer who probably became infected while visiting the abattoirs. If this were so the incubation period (35 days) of his disease would have been exceptionally long.The general features of the outbreak, which lasted several months, differed from those on the North American continent in that the latter occurred explosively within a few days with very high attack rates. The situation in the Adelaide abattoirs is similar to that in Brisbane, where the disease appears to be endemic. However, unlike in Adelaide, cases are commonly recognized outside the abattoirs in Brisbane.In the abattoirs the disease affected mainly inspectors, those working on killing beef, and those working on offal. Mutton workers were not so severely affected. However, all these groups had similar incidences of low titre antibodies suggesting that in the past Q fever spread equally in all killing departments. In departments not directly associated with slaughtering the incidence both of cases in 1957 and low titre antibodies was relatively small.It was suggested that the epidemiological features of Q fever in Adelaide could be explained by the irregular appearance of animals from infected herds situated perhaps in Queensland—a known endemic area. Perhaps the appearance of such animals in the Adelaide abattoirs might be governed by meteorological conditions such that they were prevented from going to the ordinarily most convenient slaughterhouse.

scholarly journals Geodynamics and Oil and Gas Potential of the Yenisei-Khatanga Basin (Polar Siberia)

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 510 ◽  
Author(s):  
Valery Vernikovsky ◽  
Georgy Shemin ◽  
Evgeny Deev ◽  
Dmitry Metelkin ◽  
Nikolay Matushkin ◽  
...  
Keyword(s):  
Lower Cretaceous ◽  
Oil And Gas ◽  
Foreland Basin ◽  
Gas Reservoirs ◽  
The North ◽  
Western Arctic ◽  
Folded Structures ◽  
Gas Potential ◽  
First Time ◽  
North Western

The geodynamic development of the north–western (Arctic) margin of the Siberian craton is comprehensively analyzed for the first time based on our database as well as on the analysis of published material, from Precambrian-Paleozoic and Mesozoic folded structures to the formation of the Mesozoic-Cenozoic Yenisei-Khatanga sedimentary basin. We identify the main stages of the region’s tectonic evolution related to collision and accretion processes, mainly subduction and rifting. It is demonstrated that the prototype of the Yenisei-Khatanga basin was a wide late Paleozoic foreland basin that extended from Southern Taimyr to the Tunguska syneclise and deepened towards Taimyr. The formation of the Yenisei-Khatanga basin, as well as of the West-Siberian basin, was due to continental rifting in the Permian-Triassic. The study describes the main oil and gas generating deposits of the basin, which are mainly Jurassic and Lower Cretaceous mudstones. It is shown that the Lower Cretaceous deposits contain 90% of known hydrocarbon reserves. These are mostly stacked reservoirs with gas, gas condensate and condensate with rims. The study also presents data on oil and gas reservoirs, plays and seals in the Triassic, Jurassic and Cretaceous complexes.

scholarly journals New records of lichens and allied fungi from the Leningrad Region, Russia. VII

2016 ◽  
Vol 53 ◽  
pp. 25 ◽  
Author(s):  
Dmitry E. Himelbrant ◽  
Irina S. Stepanchikova ◽  
Jurga Motiejūnaitė ◽  
Ludmila V. Gagarina ◽  
Alexandra V. Dyomina
Keyword(s):  
New Records ◽  
European Russia ◽  
Leningrad Region ◽  
Lichenicolous Fungi ◽  
The North ◽  
Western European ◽  
First Time ◽  
North Western

Fourteen species of lichens, fifteen lichenicolous fungi and one saprobic fungus are reported for the first time for St. Petersburg, Western or Eastern Leningrad Region. The lichen Lecidella meiococca and the lichenicolous fungus Tremella phaeophysciae are reported as new to Russia, the lichen Lecania sambucina and the lichenicolous fungus Endococcus tricolorans are new for the European Russia, the lichens Buellia arborea, Chaenotheca cinerea, Bellemerea sanguinea, resinicolous calicioid fungus Chaenothecopsis mediarossica and lichenicolous fungi Arthonia molendoi, Lichenochora obscuroides, Pronectria leptaleae, Sphaerellothecium cladoniae are new for the North-Western European Russia. The most interesting records are briefly discussed. 

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