Allozymic uniformity in Iris lacustris (dwarf lake iris) in Wisconsin

1994 ◽  
Vol 72 (11) ◽  
pp. 1720-1722 ◽  
Author(s):  
Michael T. Simonich ◽  
Michael D. Morgan
Keyword(s):  
United States ◽  
Genetic Variation ◽  
Life History ◽  
Great Lakes ◽  
Conservation Management ◽  
Habitat Type ◽  
The United States ◽  
Great Lakes Region ◽  
Enzyme Electrophoresis ◽  
Western Great Lakes

Iris lacustris Nutt. is a federally listed threatened species in Canada and the United States and is currently under consideration for active conservation management. The species is restricted to the shores of the western Great Lakes region and to a very narrow habitat type. Reproduction is almost exclusively by vegetative ramets. Limited sexual reproduction occurs after primarily geitonogamous pollination, although the plant is primarily selfed. Enzyme electrophoresis was used to determine the extent of genetic variation within and between Wisconsin populations. Ten enzymes coded by 22 putative genetic loci were examined. All nine populations were found to be monomorphic at the 22 loci for the same suite of isozymes. Heterozygosity was not detected at any loci. The apparent genetically depauperate nature of the species is addressed with regard to life history and reproductive biology. Implications for conservation management are addressed. Key words: Iris lacustris, threatened, isozyme, monomorphic.

scholarly journals A Methodology for Flash Drought Identification: Application of Flash Drought Frequency across the United States

2019 ◽  
Vol 20 (5) ◽  
pp. 833-846 ◽  
Author(s):  
Jordan I. Christian ◽  
Jeffrey B. Basara ◽  
Jason A. Otkin ◽  
Eric D. Hunt ◽  
Ryann A. Wakefield ◽  
...  
Keyword(s):  
United States ◽  
Great Lakes ◽  
Great Plains ◽  
Hot Spot ◽  
The United States ◽  
General Definition ◽  
Corn Belt ◽  
Great Lakes Region ◽  
Rapid Rate ◽  
Western Great Lakes

Abstract With the increasing use of the term “flash drought” within the scientific community, Otkin et al. provide a general definition that identifies flash droughts based on their unusually rapid rate of intensification. This study presents an objective percentile-based methodology that builds upon that work by identifying flash droughts using standardized evaporative stress ratio (SESR) values and changes in SESR over some period of time. Four criteria are specified to identify flash droughts: two that emphasize the vegetative impacts of flash drought and two that focus on the rapid rate of intensification. The methodology was applied to the North American Regional Reanalysis (NARR) to develop a 38-yr flash drought climatology (1979–2016) across the United States. It was found that SESR derived from NARR data compared well with the satellite-based evaporative stress index for four previously identified flash drought events. Furthermore, four additional flash drought cases were compared with the U.S. Drought Monitor (USDM), and SESR rapidly declined 1–2 weeks before a response was evident with the USDM. From the climatological analysis, a hot spot of flash drought occurrence was revealed over the Great Plains, the Corn Belt, and the western Great Lakes region. Relatively few flash drought events occurred over mountainous and arid regions. Flash droughts were categorized based on their rate of intensification, and it was found that the most intense flash droughts occurred over the central Great Plains, Corn Belt, and western Great Lakes region.

Implications of the 2012 U.S. Election for U.S. Policy in Africa’s Great Lakes Region

2013 ◽  
Vol 56 (2) ◽  
pp. 185-191
Author(s):  
Georges Nzongola-Ntalaja
Keyword(s):  
United States ◽  
Natural Resources ◽  
Great Lakes ◽  
Democratic Republic ◽  
The United States ◽  
Great Lakes Region ◽  
Security Sector ◽  
White House ◽  
Republic Of The Congo ◽  
The U.S

Abstract:While Africans are generally satisfied that a person of African descent was reelected to the White House following a campaign in which vicious and racist attacks were made against him, the U.S. Africa policy under President Barack Obama will continue to be guided by the strategic interests of the United States, which are not necessarily compatible with the popular aspirations for democracy, peace, and prosperity in Africa. Obama’s policy in the Great Lakes region provides an excellent illustration of this point. Since Rwanda and Uganda are Washington’s allies in the “war against terror” in Darfur and Somalia, respectively, the Obama administration has done little to stop Kigali and Kampala from destabilizing the Democratic Republic of the Congo (DRC) and looting its natural resources, either directly or through proxies. Rwanda and Uganda have even been included in an international oversight mechanism that is supposed to guide governance and security sector reforms in the DRC, but whose real objective is to facilitate Western access to the enormous natural wealth of the Congo and the Great Lakes region.

scholarly journals ARGONAUT II Study of the In Vitro Activity of Plazomicin against Carbapenemase-Producing Klebsiella pneumoniae

2020 ◽  
Vol 64 (5) ◽  
Author(s):  
Michael R. Jacobs ◽  
Caryn E. Good ◽  
Andrea M. Hujer ◽  
Ayman M. Abdelhamed ◽  
Daniel D. Rhoads ◽  
...  
Keyword(s):  
United States ◽  
16S Rrna ◽  
Klebsiella Pneumoniae ◽  
Great Lakes ◽  
The United States ◽  
Great Lakes Region ◽  
In Vitro Activity ◽  
Content Type ◽  
Carbapenem Resistant

ABSTRACT Plazomicin was tested against 697 recently acquired carbapenem-resistant Klebsiella pneumoniae isolates from the Great Lakes region of the United States. Plazomicin MIC50 and MIC90 values were 0.25 and 1 mg/liter, respectively; 680 isolates (97.6%) were susceptible (MICs of ≤2 mg/liter), 9 (1.3%) intermediate (MICs of 4 mg/liter), and 8 (1.1%) resistant (MICs of >32 mg/liter). Resistance was associated with rmtF-, rmtB-, or armA-encoded 16S rRNA methyltransferases in all except 1 isolate.

Ecosystem respiration and its components in an old-growth forest in the Great Lakes region of the United States

2008 ◽  
Vol 148 (2) ◽  
pp. 171-185 ◽  
Author(s):  
Jianwu Tang ◽  
Paul V. Bolstad ◽  
Ankur R. Desai ◽  
Jonathan G. Martin ◽  
Bruce D. Cook ◽  
...  
Keyword(s):  
United States ◽  
Great Lakes ◽  
Ecosystem Respiration ◽  
The United States ◽  
Great Lakes Region ◽  
Old Growth ◽  
Old Growth Forest

Effects of winter temperatures on gypsy moth egg masses in the Great Lakes region of the United States

2001 ◽  
Vol 110 (2) ◽  
pp. 85-100 ◽  
Author(s):  
J.A Andresen ◽  
D.G McCullough ◽  
B.E Potter ◽  
C.N Koller ◽  
L.S Bauer ◽  
...  
Keyword(s):  
United States ◽  
Great Lakes ◽  
Gypsy Moth ◽  
The United States ◽  
Great Lakes Region ◽  
Egg Masses ◽  
Winter Temperatures

An evaluation of fire danger and behaviour indices in the Great Lakes Region calculated from station and gridded weather information

2014 ◽  
Vol 23 (2) ◽  
pp. 202 ◽  
Author(s):  
John D. Horel ◽  
Robert Ziel ◽  
Chris Galli ◽  
Judith Pechmann ◽  
Xia Dong
Keyword(s):  
United States ◽  
Great Lakes ◽  
The United States ◽  
Fire Danger ◽  
Great Lakes Region ◽  
Fire Weather ◽  
Fuel Moisture ◽  
Fire Behaviour ◽  
Fire Weather Index ◽  
Weather Parameters

A web-based set of tools has been developed to integrate weather, fire danger and fire behaviour information for the Great Lakes region of the United States. Weather parameters obtained from selected observational networks are combined with operational high-resolution gridded analyses and forecast products from the United States National Weather Service. Fuel moisture codes and fire behaviour indices in the Fire Weather Index subsystem of the Canadian Forest Fire Danger Rating System are computed from these sources for current and forecast conditions. Applications of this Great Lakes Fire and Fuels System are demonstrated for the 2012 fire season. Fuel moisture codes and fire behaviour indices computed from gridded analyses differ from those derived from observations in a manner similar to the analysis errors typical for the underlying weather parameters. Indices that are particularly sensitive to seasonally accumulating precipitation, such as the Drought Code, exhibit the largest differences. The gridded analyses and forecasts provide considerable additional information for fire weather professionals to evaluate weather and fuel state in the region. The potential utility of these gridded analyses and forecasts throughout the continental United States is highlighted.

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