Life Cycle and Population Structure of the Salamander Stereochilus marginatus in North Carolina

Copeia ◽  
1971 ◽  
Vol 1971 (2) ◽  
pp. 234 ◽  
Author(s):  
Richard C. Bruce
Keyword(s):  
North Carolina ◽  
Population Structure ◽  
Life Cycle

Life cycle and population structure of the terrestrial isopodHemilepistus klugii(Brandt, 1833) (Isopoda: Oniscidea) in Iran

2011 ◽  
Vol 45 (33-34) ◽  
pp. 2081-2094 ◽  
Author(s):  
Ghasem M. Kashani ◽  
Alireza Sari ◽  
Shidokht Hosseinie ◽  
Masoumeh Malek ◽  
Ehsan Entezari
Keyword(s):  
Population Structure ◽  
Life Cycle

scholarly journals Clonal Population Structure and Specific Genotypes of Multidrug-Resistant Campylobacter coli from Turkeys

2007 ◽  
Vol 73 (7) ◽  
pp. 2156-2164 ◽  
Author(s):  
C. B. D'lima ◽  
W. G. Miller ◽  
R. E. Mandrell ◽  
S. L. Wright ◽  
R. M. Siletzky ◽  
...  
Keyword(s):  
North Carolina ◽  
Population Structure ◽  
Multidrug Resistant ◽  
Source Tracking ◽  
Campylobacter Coli ◽  
Clonal Population ◽  
Antimicrobial Resistance Profile ◽  
Clonal Population Structure ◽  
Commercial Turkey ◽  
Sequence Types

ABSTRACT Commercial turkey flocks in North Carolina have been found to be colonized frequently with Campylobacter coli strains that are resistant to several antimicrobials (tetracycline, streptomycin, erythromycin, kanamycin, and ciprofloxacin/nalidixic acid). Such strains have been designated multidrug resistant (MDR). However, the population structure of MDR C. coli from turkeys remains poorly characterized. In this study, an analysis of multilocus sequence typing (MLST)-based sequence types (STs) of 59 MDR strains from turkeys revealed that the majority of these strains corresponded to one of 14 different STs, with three STs accounting for 41 (69%) of the strains. The major STs were turkey specific, and most (87%) of the strains with these STs were resistant to the entire panel of antibiotics mentioned above. Some (13%) of the strains with these STs were susceptible to just one or two of the antibiotics in this panel. Further subtyping using fla typing and pulsed-field gel electrophoresis with SmaI and KpnI revealed that the major MDR STs corresponded to strains of related but distinct subtypes, providing evidence for genomic diversification within these STs. These findings suggest that MDR strains of C. coli from turkeys have a clonal population structure characterized by the presence of a relatively small number of clonal groups that appear to be disseminated in the turkey production system. In addition, the observed correlation between STs and the MDR profiles of the microbes indicates that MLST-based typing holds potential for source-tracking applications specific to the animal source (turkeys) and the antimicrobial resistance profile (MDR status) of C. coli.

Highway Asset Deterioration Rates

2018 ◽  
Vol 2672 (12) ◽  
pp. 179-186
Author(s):  
William Rasdorf ◽  
Ali Almalki
Keyword(s):  
North Carolina ◽  
Life Cycle ◽  
Data Collection ◽  
Collection Method ◽  
Pavement Maintenance ◽  
Geographical Regions ◽  
New Knowledge ◽  
Road Systems ◽  
Ready Availability ◽  
Highway Assets

This paper is about highway asset deterioration rates. Typically, these are difficult to determine. However, using a data collection method adopted in North Carolina (and the resulting data obtained over a 5-year timespan), an approach was developed to determine accurate deterioration rates for several highway assets. This was not previously done, and thus, deterioration was not included as a factor in estimating future maintenance needs for these assets despite the ready availability of the necessary data. This paper focuses on unpaved shoulders and outlines how their deterioration rates were obtained and how such rates can also be obtained for other assets. The resulting deterioration rates are presented and compared over various road systems and geographical regions. With this new knowledge, deterioration rates can now be included in life cycle asset analysis, resulting in more accurate condition predictions and maintenance budgeting. The paper focuses on highway assets and does not address bridge or pavement maintenance.

scholarly journals Distribution and population structure in the naked goby Gobiosoma bosc (Perciformes: Gobiidae) along a salinity gradient in two western Atlantic estuaries

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5380 ◽  
Author(s):  
Christopher S. Moore ◽  
Matthew J. Ruocchio ◽  
April M.H. Blakeslee
Keyword(s):  
Genetic Diversity ◽  
North Carolina ◽  
Population Structure ◽  
Gene Flow ◽  
Salinity Gradient ◽  
Western Atlantic ◽  
Widespread Species ◽  
Naked Goby ◽  
Gobiosoma Bosc ◽  
Scale Population

Many species of fish produce larvae that undergo a prolonged dispersal phase. However, evidence from a number of recent studies on demersal fishes suggests that the dispersal of propagules may not be strongly correlated with gene flow. Instead, other factors like larval behavior and the availability of preferred settlement habitat may be more important to maintaining population structure. We used an ecologically important benthic fish species, Gobiosoma bosc (naked goby), to investigate local and regional scale population structure and gene flow along a salinity gradient (∼3 ppt to ∼18 ppt) in two North Carolina estuaries. G. bosc is an abundant and geographically widespread species that requires complex but patchy microhabitat (e.g. oyster reefs, rubble, woody debris) for reproduction and refuge. We sequenced 155 fish from 10 sites, using a common barcoding gene (COI). We also included recent sequence data from GenBank to determine how North Carolina populations fit into the larger biogeographic understanding of this species. In North Carolina, we found a significant amount of gene flow within and between estuaries. Our analysis also showed high predicted genetic diversity based upon a large number of rare haplotypes found within many of our sampled populations. Moreover, we detected a number of new haplotypes in North Carolina that had not yet been observed in prior work. Sampling along a salinity gradient did not reveal any significant positive or negative correlations between salinity and genetic diversity, nor the proportion of singleton haplotypes, with the exception of a positive correlation between salinity standard deviation and genetic diversity. We also found evidence that an introduced European population of naked gobies may have originated from an Atlantic source population. Altogether, this system offers a compelling way to evaluate whether factors other than dispersal per se mediate recruitment in an estuarine-dependent species of fish with a larval dispersal phase. It also demonstrates the importance of exploring both smaller and larger scale population structure in marine organisms to better understand local and regional patterns of population connectivity and gene flow.

scholarly journals Methods of supporting the development of Phytophthora cinnamomi rands on representatives of the Ericaceae DC family. In the orangeries of the Botanical garden of Peter the Great

2021 ◽  
Vol 1 (157) ◽  
pp. 26-33
Author(s):  
E. A. Varfolomeeva ◽  
E. O. Rezanko
Keyword(s):  
Population Structure ◽  
Life Cycle ◽  
Soil Microorganisms ◽  
Phytophthora Cinnamomi ◽  
Botanical Garden ◽  
Wide Distribution ◽  
Rhizospheric Soil ◽  
Potassium Humate ◽  
Peter The Great ◽  
Resistance Inducers

In recent years, in the orangeries of the Peter the Great Botanical Garden, the affection of representatives of the Ericaceae family, the genus rhododendron (Rhododendron (L.) oomycete Phytophthora cinnamomi, has been growing. In the study of the rhizospheric soil of sick and healthy plants, a wide distribution of Phytophthora was found. representatives of this family. The dynamics of the spread of the disease from 2012 to 2019 is presented. The population of Phytophthora cinnamomi in the soils is unevenly distributed, changing its structure (abundance, survival, seasonality, life cycle) in accordance with various micro -phytocenoses. The population structure is governed by coenotic relationships with soil microorganisms. The Phytophthora cinnamomi population is “pulsating,” with a maximum population (in May-June) and a minimum in NovemberDecember. The creation of suppressive soils and suppression factors may serve as a preliminary strategy when creating measures to protect plants of the Peter the Great Botanical Garden. The results of studies of the effects of biological products (Vitaplan, Sternifag, Gliokladin) and fertilizers (Potassium humate, Ecofus) on the pathogen are presented. To increase immunity, resistance inducers (immunocytophyte, sillplant, chitosan) were used.

Tubeufia cerea. [Descriptions of Fungi and Bacteria].

1999 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
New York ◽  
North Carolina ◽  
Life Cycle ◽  
Experimental Evidence ◽  
Geographical Distribution ◽  
New Hampshire ◽  
Temperate Zone ◽  
The North ◽  
Water Splash ◽  
The Tropics

Abstract A description is provided for Tubeufia cerea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: developing on effete stromata of bark-inhabiting ascomycetes, especially members of the Diatrypaceae, probably also obtaining nutrition from the bark tissues. DISEASE: probably none, the fungus living saprobically on dead fungal tissues for at least most of its life cycle. No detailed studies of its biology in nature have been carried out. GEOGRAPHICAL DISTRIBUTION: widely distributed in the north temperate zone with a few records from the tropics. Recorded from Austria, Belgium, Canada, Guyana, India, Netherlands, Portugal, Russia, UK, USA (Florida, Illinois, Iowa, Louisiana, Maine, Maryland, Massachusetts, Minnesota, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Carolina, Ohio, Vermont, Utah). TRANSMISSION: the ascospores are presumably air-dispersed and the conidia transmitted via water-splash, but there is no experimental evidence to support these suppositions.

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