intraspecific biodiversity
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2016 ◽  
Vol 71 (9-10) ◽  
pp. 335-345
Author(s):  
Evi Lang-Halter ◽  
Steffen Schober ◽  
Siegfried Scherer

Abstract During a 1-year longitudinal study, water, sediment and water plants from two creeks and one pond were sampled monthly and analyzed for the presence of Listeria species. A total of 90 % of 30 sediment samples, 84 % of 31 water plant samples and 67 % of 36 water samples were tested positive. Generally, most probable number counts ranged between 1 and 40 g−1, only occasionally >110 cfu g−1 were detected. Species differentiation based on FT-IR spectroscopy and multiplex PCR of a total of 1220 isolates revealed L. innocua (46 %), L. seeligeri (27 %), L. monocytogenes (25 %) and L. ivanovii (2 %). Titers and species compositions were similar during all seasons. While the species distributions in sediments and associated Ranunculus fluitans plants appeared to be similar in both creeks, RAPD typing did not provide conclusive evidence that the populations of these environments were connected. It is concluded that (i) the fresh-water sediments and water plants are year-round populated by Listeria, (ii) no clear preference for growth in habitats as different as sediments and water plants was found and (iii) the RAPD-based intraspecific biodiversity is high compared to the low population density.


PLoS ONE ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. e0148499 ◽  
Author(s):  
Dorte Bekkevold ◽  
Riho Gross ◽  
Timo Arula ◽  
Sarah J. Helyar ◽  
Henn Ojaveer

2016 ◽  
Vol 121 ◽  
pp. 50-58 ◽  
Author(s):  
Cédric Grangeteau ◽  
Daniel Gerhards ◽  
Sebastien Terrat ◽  
Samuel Dequiedt ◽  
Hervé Alexandre ◽  
...  

LWT ◽  
2015 ◽  
Vol 60 (1) ◽  
pp. 102-108 ◽  
Author(s):  
Maria Rosaria Di Toro ◽  
Vittorio Capozzi ◽  
Luciano Beneduce ◽  
Hervé Alexandre ◽  
Mariana Tristezza ◽  
...  

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Daniele Canestrelli ◽  
Roberta Bisconti ◽  
Florinda Sacco ◽  
Giuseppe Nascetti

2013 ◽  
Vol 11 (2) ◽  
pp. 461-468 ◽  
Author(s):  
V. Romano Spica ◽  
S. Giampaoli ◽  
L. Buggiotti ◽  
M. Vitali ◽  
G. Gianfranceschi ◽  
...  

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