Header

Shop : Details

Shop
Details
49,80 €
ISBN 978-3-8440-5405-7
Softcover
242 pages
137 figures
313 g
21 x 14,8 cm
English
Thesis
August 2017
Karsten Breddermann
Filtration Performance of Plankton Nets used to catch Micro- and Mesozooplankton
Zooplankton is of great significance in waters. It acts as an indicator for water quality, links the lower trophic levels like algae in the food chain with higher trophic levels like fish and plays an important, not yet fully known, part in the cycling of biogeochemical key elements. Abundance estimates of zooplankton build the base for the associated fields of research. The most widely used devices to take zooplankton samples to form abundance estimates are up to now Plankton nets. Nets of various sizes and designs are in use which do have different sampling characteristics and in consequence, result in different abundance estimates of zooplankton.

To document the different sampling characteristics of nine commonly used plankton nets the hydrodynamics of the catching devices were numerically investigated with computational fluid dynamic (CFD) methods, more precisely "Reynolds averaged Navier-Stokes" (RANS) methods. The investigation included the 1 m² MOCNESS, CalCOFI 1-m Ring net, Multinet Midi, Bongo net (Ø =60 cm), WP-2 net and the Bongo net (Ø =20 cm) to sample the smaller mesozooplankton and 3 different Apstein nets to sample microzooplankton.

Vertical plankton net tows were simulated to determine the filtration efficiency (dimensionless coefficient for the volume flow rate into the net), the filtration pressure (pressure difference between the inside and the outside of the netting) and the pressure distribution in front of the nets. The towing velocity ranged from 0.5 up to 2.3 kn for the nets to catch the smaller mesozooplankton. For the microzooplankton nets the towing velocity was in the range of 0.07 to 0.66 m/s. The findings were combined in technical characteristic sheets available for each investigated net.
Keywords: Plankton net; gauze screen; filtration efficiency; filtration performance; CFD
Rostocker Meerestechnische Reihe
Edited by Prof. Dr.-Ing. habil. Mathias Paschen, Rostock
Volume 2017,12
Available online documents for this title
You need Adobe Reader, to view these files. Here you will find a little help and information for downloading the PDF files.
Please note that the online documents cannot be printed or edited.
Please also see further information at: Help and Information.
 
 DocumentDocument 
 TypePDF 
 Costs37,35 € 
 ActionDownloadPurchase in obligation and download the file 
     
 
 DocumentTable of contents 
 TypePDF 
 Costsfree 
 ActionDownloadDownload the file 
     
User settings for registered online customers (online documents)
You can change your address details here and access documents you have already ordered.
User
Not logged in
Export of bibliographic data
Shaker Verlag GmbH
Am Langen Graben 15a
52353 Düren
Germany
  +49 2421 99011 9
Mon. - Thurs. 8:00 a.m. to 4:00 p.m.
Fri. 8:00 a.m. to 3:00 p.m.
Contact us. We will be happy to help you.
Captcha
Social Media