Role of even-age population structure in the disappearance of Acacia xanthophloea woodlands

This review analyses the ostracod record in Holocene tsunami deposits, using an overview of the 2004 Indian Ocean tsunami impact on its recent populations and the associated tsunamigenic deposits, together with results from numerous investigations of other Holocene sequences. Different features such as the variability of the local assemblages, population density, species diversity, age population structure (e.g., percentages of adults and juvenile stages) or taphonomical signatures suggest that these microorganisms may be included amongst the most promising tracers of these high-energy events in marshes, lakes, lagoons or shallow marine areas.

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Population structure, food relations and ecological role of marine oligochaetes, with special reference to meiobenthic species

Marine Biology ◽

10.1007/bf00391626 ◽

1975 ◽

Vol 31 (2) ◽

pp. 139-156 ◽

Cited By ~ 55

Author(s):

O. Giere

Keyword(s):

Population Structure ◽

Special Reference ◽

Ecological Role ◽

Marine Oligochaetes

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Population Structure and Antimicrobial Resistance of Canine UropathogenicEscherichia coli

Journal of Clinical Microbiology ◽

10.1128/jcm.00788-18 ◽

2018 ◽

Vol 56 (9) ◽

Cited By ~ 12

Author(s):

Tessa E. LeCuyer ◽

Barbara A. Byrne ◽

Joshua B. Daniels ◽

Dubraska V. Diaz-Campos ◽

G. Kenitra Hammac ◽

...

Keyword(s):

Population Structure ◽

Antimicrobial Resistance ◽

Companion Animals ◽

Sequence Type ◽

Content Type ◽

E Coli ◽

Extraintestinal Disease ◽

Human Infections ◽

Sequence Types

ABSTRACTEscherichia coliis the most common cause of human and canine urinary tract infection (UTI). Clonal groups, often with high levels of antimicrobial resistance, are a major component of theE. colipopulation that causes human UTI. While little is known about the population structure ofE. colithat causes UTI in dogs, there is evidence that dogs and humans can share fecal strains ofE. coliand that human-associated strains can cause disease in dogs. In order to better characterize theE. colistrains that cause canine UTI, we analyzed 295E. coliisolates obtained from canine urine samples from five veterinary diagnostic laboratories and analyzed their multilocus sequence types, phenotypic and genotypic antimicrobial resistance profiles, and virulence-associated gene repertoires. Sequence type 372 (ST372), an infrequent human pathogen, was the predominant sequence type in dogs at all locations. Extended-spectrum β-lactamase-producing isolates withblaCTX-Mgenes were uncommon in canine isolates but when present were often associated with sequence types that have been described in human infections. This provides support for occasional cross-host-species sharing of strains that cause extraintestinal disease and highlights the importance of understanding the role of companion animals in the overall transmission patterns of extraintestinal pathogenicE. coli.

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