Species and trait compositions of freshwater nematodes as indicative descriptors of lake eutrophication

Varying Patterns on Varying Scales: A Metacommunity Analysis of Nematodes in European Lakes

“…We investigated the nematode communities in the littoral zones of 16 European lakes covering a gradient from oligotrophic to eutrophic conditions ( Fig 1 ). Therefore data from a study of Ristau et al [ 36 ] were supplemented by data on Lake Löptin (Löptiner See). Eight lakes were situated in southern Sweden and eight in northern Germany.…”

Diplolaimella dievengatensis (Nematoda: Monhysteridae) as model organism in ecotoxicity assay

“…D. dievengatensis and L. marina are both ranked as opportunist nematodes with MI values of 2 and 1, respectively. This classification has been widely used and studies have shown contradictory responses, not necessarily revealing a correlation between this rank and sensibility/tolerance of nematode species to stress (Kammenga et al, 1994;Korthals et al, 1996;Li et al, 2005;Heininger et al, 2007;Brinke et al, 2011;Höss et al, 2011;Ristau et al, 2015). Such contradictory responses may be related to a misinterpretation of how the sensibility/tolerance of nematodes, as ranked by the MI, corresponds to the different levels of biological organization (i.e.…”

“…Since free-living marine nematodes have a set of life cycle traits which may suggest low dispersal capabilities, it is necessary to investigate whether species with wide distribution ranges or the cosmopolitans, represent, indeed, complexes of cryptic species. Moreover, considerable cryptic diversity has been observed in the in a wide range of nematode species (DERYCKE et al, 2013;RISTAU;. In chapter one, an integrative taxonomic approach was applied in order to compare individuals of the nematode Diplolaimella dievengatensis at distinct life-stages from Brazil with those from the species type-locality, in Belgium coast, described by .…”

“…In some circumstances, for instance, they may exhibit dominance in ecosystems under higher nutrient levels (RISTAU et al, 2015), whereas others species were negatively correlated with pollutants (e.g. Pb) (HEININGER et al, 2007).…”

“…Considerable cryptic diversity has already been observed in a wide range of nematode species (DERYCKE et al, 2013;RISTAU et al, 2015). Such question can be addressed by means of integrative approaches, which consists in using different data (morphological, developmental, molecular, behavioral, ecological, etc.…”