Results 91 to 100 of about 10,751,966 (215)

Diversity of the parB and repA genes of the Burkholderia cepacia complex and their utility for rapid identification of Burkholderia cenocepacia [PDF]

open access: yes, 2008
Background: Burkholderia cenocepacia is the most prominent species of the B. cepacia complex (Bcc), a group of nine closely related and difficult to identify bacteria that cause serious infections in patients with cystic fibrosis.
Mahenthiralingam Eshwar   +14 more
core   +1 more source

A New Argyreia Lour. (Convolvulaceae) from Northern Thailand

open access: yesTaxonomy
Argyreia elegans Traiperm, Tetsana & Chitchak, sp. nov., from northern Thailand is described and illustrated. The new species resembles A. kerrii Craib but differs in terms of having lanceolate to oblong leaves, up to two inflorescences (each bearing 1–3
Natthaphong Chitchak   +3 more
doaj   +1 more source

A step‐by‐step protocol for meiotic chromosome counts in flowering plants: A powerful and economical technique revisited

open access: yesApplications in Plant Sciences, 2020
Premise Counting chromosomes is a fundamental botanical technique, yet it is often intimidating and increasingly sidestepped. Once mastered, the basic protocol can be applied to a broad range of taxa and research questions.
Michael D. Windham   +5 more
doaj   +1 more source

Welcome to InvasiveSpecies.gov!

open access: yes, 2011
This website contains information about the purpose and work of the National Invasive Species Council, including its plans to prevent and manage invasive species, educational materials, budgetary and organizational documents of the Council, and other ...
National Invasive Species Council (U.S.)
core  

A species delimitation approach in the Trochulus sericeus/hispidus complex reveals two cryptic species with a sharp contact zone [PDF]

open access: yes, 2009
Background: Mitochondrial DNA sequencing increasingly results in the recognition of genetically divergent, but morphologically cryptic lineages. Species delimitation approaches that rely on multiple lines of evidence in areas of co-occurrence are ...
Dépraz, Aline   +11 more
core   +1 more source

Statistical scaling laws for competing biological species

open access: yes, 2018
Universality classes are defined for an idealized nonlinear system that governs the competition between biological species. The decay to asymptotic steady state is examined for supercritical Hopf bifurcation by considering a phenomenological approach ...
Silva, Vinicius Barros da [UNESP]   +1 more
core   +1 more source

Bemisia tabaci (Gennadius): From Complex Species to a Species-Complex

open access: yes
The whitefly, Bemisia tabaci (Gennadius), a cryptic species-complex, encompasses a number of morphologically indistinguishable species which differ genetically from each other. It probably represents the highest number of biotypes or genetic groups than any other species in the order Hemiptera.
ANUP CHANDRA   +7 more
openaire   +1 more source

Water diviners described: six new species of the Niphargus aquilex (Crustacea, Amphipoda) complex

open access: yesEuropean Journal of Taxonomy
With the onset of molecular taxonomy, it has been recognized that groundwater crustaceans in the family Niphargidae Bousfield, 1977 (Crustacea, Amphipoda) can demonstrate either highly variable or static phenotypes.
Dieter Weber   +2 more
doaj   +1 more source

DNA Barcoding of Recently Diverged Species: Relative Performance of Matching Methods [PDF]

open access: yes, 2012
Recently diverged species are challenging for identification, yet they are frequently of special interest scientifically as well as from a regulatory perspective.
Giovanni Felici (187770)   +12 more
core   +1 more source

Complex genetic patterns in closely related colonizing invasive species [PDF]

open access: yes, 2012
Anthropogenic activities frequently result in both rapidly changing environments and translocation of species from their native ranges (i.e., biological invasions).
Bock, Dan G   +10 more
core   +1 more source

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