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enchytraeids and some other species), are covered less frequently. as earthworms, have been investigated at these sites for The generally lower densities and species numbers more than 20 years (Beylich & Graefe 2014). Ploughing For the present study, data of all agricultural soil- distributes harvest residues over a depth of about monitoring sites in Schleswig-Holstein were utilized. Consequently, microannelids (and other soil The main aim was to find out whether short-term effects fauna) spread more or less evenly over this depth or even of tillage can be recognized and thus be distinguished concentrate at lower layers (Zimmermann 1987, Röhrig et from possibly occurring long-term changes of the al. To soil surface downwards can be found, rather similar to the achieve this, we assessed microannelid total abundance situation encountered in grassland.Microannelids occur regularly in arable field soils in similar numbers as other mesofauna groups. Animals of microannelids in field soils compared to grassland have been identified to species level, which allows the are often attributed at least partly to tillage impacts. As the aim of soil Microannelids have been shown to exhibit lower monitoring sites is the detection of long-term changes abundance in ploughed soils in comparison to field (time scale: years to decades), it should be possible to soils with non-inverting tillage (Langmaack et al. The latter are presumably linked to indicating no positive effects of reduced tillage or no- fast reacting parameters like the total abundance and tillage practices on microannelids abundance or biomass abundance of r-strategist species, whereas long-term (Parmelee et al. 2012, van Capelle et effects are expected to be related rather to the species al. Distinct differences between ploughing versus number, species composition and parameters derived non-inverting tillage have been reported concerning thereof, e.g. Tillage practices have and dominance of r-strategist species, assuming these an immediate effect on soil fauna, as animals are damaged, parameters to change quickly with time, as has been micro-habitats are destroyed, soil moisture is changed shown in studies on population dynamics (Nakamura et etc.Grassland sites served rather short-term approaches ( 8 % clay content)?seems less prone to short-term fluctuations than e.g. In comparison, in no-tillage microannelid population, either caused by changed or shallow tillage systems, decreasing densities from the management practices or other environmental factors.Microannelids tillage methods, soil texture, fertilization, season and occur regularly in arable field soils in similar numbers climate.With regard to the advancement of sustainable as other mesofauna groups.Every person mentioned on this website is presumed innocent until proven guilty in a court of law. tillage practices on soil fauna would be desirable, as soil organisms contribute considerably to soil fertility.
seems less prone to short-term fluctuations than e.g.
Five categories were distinguished as presented in Tab. Here, not the sites were grouped, but sampling occasions, as tillage practices at a site might vary from one sampling to another.
For checking the tillage impact over several years, we calculated the mean number of all tillage events per year (including ploughing, shallow tillage etc.) and separately the mean number of ploughing events per year for a time- span of 5–7 years before each sampling, including the year of sampling.
Two field sites were managed according to organic farming regulations with crop rotation including catch crops and periods of reduced tillage frequency.
To assess the influence of tillage on microannelids, the data from field sites were grouped further according to the time span between sampling and last tillage event in the year of microannelid sampling.