The temporal and spatial distribution of nematodes in percolating filters |
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Authors: | Johanna Laybourn-Parry Mark Woombs |
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Institution: | (1) Department of Biological Sciences, University of Lancaster, LA1 4YQ Lancaster, UK |
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Abstract: | The spatial and temporal distribution of nematodes in two low rate percolating filter bed sewage treatment plants at Carnforth
and Caton, Lancashire, were investigated. Nematodes were abundant reaching densities up to 900 cm−2 of media surface. Numbers decreased down the bed and species composition displayed spatial differences with bed depth. Eight
orders of nematode were represented, members of the sub-family Diplogasterinae and Rhabditinae were particularly common. A
seasonal pattern of abundance was clearly apparent; two peaks occurred, one in May and a second during the winter months.
Lowest numbers corresponded with periods of highest temperature. The demise of the nematodes in the spring was related to
the sloughing of the surface film on the media. |
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Keywords: | bacterivore nematode sewage treatment spatial distribution seasonal distribution |
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