Kirsten Powers
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View article: Taxonomy of Tobrilidae species from the Alkaline Lakes of the western Nebraska Sandhills
Taxonomy of Tobrilidae species from the Alkaline Lakes of the western Nebraska Sandhills Open
Six distinct COI mitochondrial Haplotype Groups (HG) are morphologically, ecologically, and genetically characterized from the aquatic nematode family Tobrilidae. Collection locations included the extreme habitats of the Alkaline Lakes in …
View article: Effects of drought-induced stress on nematode communities in aquatic and terrestrial habitats of the Nebraska Sandhills
Effects of drought-induced stress on nematode communities in aquatic and terrestrial habitats of the Nebraska Sandhills Open
Introduction Global change events (e.g., worsening drought) are increasing environmental stress in a variety of terrestrial and aquatic habitats. The degree to which communities in soils and sediments are driven by temporal environmental c…
View article: Ecological and morphological differentiation among COI haplotype groups in the plant parasitic nematode species <i>Mesocriconema xenoplax</i>
Ecological and morphological differentiation among COI haplotype groups in the plant parasitic nematode species <i>Mesocriconema xenoplax</i> Open
DNA barcoding with the mitochondrial COI gene reveals distinct haplotype subgroups within the monophyletic and parthenogenetic nematode species, Mesocriconema xenoplax . Biological attributes of these haplotype groups (HG) have not been ex…
View article: <i>Plectus</i> of the Prairie: A Case Study of Taxonomic Resolution from a Nematode Biodiversity Survey
<i>Plectus</i> of the Prairie: A Case Study of Taxonomic Resolution from a Nematode Biodiversity Survey Open
Taxonomic resolution is a critical component of biodiversity assessments. In this case study, we examined a single taxon within a larger study of nematode diversity to evaluate the taxonomic resolution of different diversity assessment met…
View article: <i>Pratylenchus smoliki</i>, a new nematode species (Pratylenchidae: Tylenchomorpha) from the Great Plains region of North America
<i>Pratylenchus smoliki</i>, a new nematode species (Pratylenchidae: Tylenchomorpha) from the Great Plains region of North America Open
Pratylenchus smoliki is a new species of root-lesion nematode described from corn-soybean production fields in the Central Great Plains of North America. It is characterized by populations with relatively abundant males, two lip annuli, fe…
View article: A COI DNA barcoding survey of <i>Pratylenchus</i> species in the Great Plains Region of North America
A COI DNA barcoding survey of <i>Pratylenchus</i> species in the Great Plains Region of North America Open
Pratylenchus species are among the most common plant parasitic nematodes in the Great Plains Region of North America. Our goal was to survey Pratylenchus species diversity across the Great Plains region using a mitochondrial COI DNA barcod…
View article: DNA barcoding evidence for the North American presence of alfalfa cyst nematode, <i>Heterodera medicaginis</i>
DNA barcoding evidence for the North American presence of alfalfa cyst nematode, <i>Heterodera medicaginis</i> Open
Specimens of Heterodera have been collected from alfalfa fields in Kearny County, Kansas & Carbon County, Montana. DNA barcoding with the COI mitochondrial gene indicate that the species is not Heterodera glycines , soybean cyst nematode, …
View article: Discovery and Identification of <i>Meloidogyne</i> Species Using COI DNA Barcoding
Discovery and Identification of <i>Meloidogyne</i> Species Using COI DNA Barcoding Open
DNA barcoding with a new cytochrome oxidase c subunit 1 primer set generated a 721 to 724 bp fragment used for the identification of 322 Meloidogyne specimens, including 205 new sequences combined with 117 from GenBank. A maximum likelihoo…
View article: Species Delimitation and Description of Mesocriconema nebraskense n. sp. (Nematoda: Criconematidae), a Morphologically Cryptic, Parthenogenetic Species from North American Grasslands
Species Delimitation and Description of Mesocriconema nebraskense n. sp. (Nematoda: Criconematidae), a Morphologically Cryptic, Parthenogenetic Species from North American Grasslands Open
Nematode surveys of North American grasslands conducted from 2010 to 2015 frequently recovered a species of crico- nematid nematode morphologically resembling Mesocriconema curvatum. These specimens were recovered from remnant native prair…
View article: An 18S rDNA Perspective on the Classification of Criconematoidea
An 18S rDNA Perspective on the Classification of Criconematoidea Open
In the nematode family Criconematidae, a taxonomy primarily based on cuticle characters has created classifications that are notoriously volatile. Molecular characters may lead to their stabilization. A phylogenetic tree of Criconematoidea…
View article: Species discovery and diversity in Lobocriconema (Criconematidae: Nematoda) and related plant-parasitic nematodes from North American ecoregions
Species discovery and diversity in Lobocriconema (Criconematidae: Nematoda) and related plant-parasitic nematodes from North American ecoregions Open
There are many nematode species that, following formal description, are seldom mentioned again in the scientific literature. Lobocriconema thornei and L. incrassatum are two such species, described from North American forests, respectively…
View article: Evaluation of 3M™ Molecular Detection Assay (MDA) Listeria monocytogenes for the Detection of Listeria monocytogenes in Selected Foods and Environmental Surfaces: Collaborative Study, First Action 2014.07
Evaluation of 3M™ Molecular Detection Assay (MDA) Listeria monocytogenes for the Detection of Listeria monocytogenes in Selected Foods and Environmental Surfaces: Collaborative Study, First Action 2014.07 Open
The 3M™ Molecular Detection Assay (MDA) Listeria monocytogenes combines isothermal amplification and bioluminescence to detect Listeria monocytogenes with high specificity and efficiency in select foods and environmental samples. The 3M MD…