By J. Bloem, D. W. Hopkins, A. Benedetti

This e-book offers a range of microbiological equipment that are acceptable or already utilized in neighborhood or nationwide soil caliber tracking programmes. an outline is given of methods to tracking, comparing and coping with soil caliber (Part I), through a range of tools that are defined in adequate element to exploit the booklet as a pragmatic instruction manual within the laboratory (Part II). eventually a census is given of the most equipment utilized in over 30 eu laboratories. The publication is geared toward various degrees: soil scientists, technicians, coverage makers, land managers and scholars.

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Carnivores Number spec. hyphal feeding Number spec. omnivores Number spec. plant feeding Number of functional groups Enchytraeids Abundance (number/m2) Number of taxa Biomass (g/m2) Number of Friderica (number/m2) Earthworms Abundance (number/m2) Biomass (g/m2) Endogé-species (deeper in soil) Epigé-species (closer to surface) Grassland on sea-clay (n = 20) Horticulture (n = 17) Statistical significance of difference Grl. – Hort. , horticulture; ns, not significant. 38 J. Bloem et al. In a single soil, thymidine incorporation, leucine incorporation and bacterial biomass usually show coefficients of variation (CV) of 10%, 5% and 30%, respectively.

Thus, this method reflects the composition of most of the bacterial biomass, but not the total number of species. 22) was only found in the usually acid forest soils, which also contained a very small bacterial biomass (Fig. 7). The bacterial biomass was also very low in horticultural soils, higher in arable soils and high in grassland. Grassland contained a higher bacterial biomass on clay than on sand. ) than in grassland. Similar to the biomass, potential nitrogen mineralization was very low in forest, higher in arable land and highest in grassland (Fig.

On the other hand, bacterial genetic diversity based on DGGE DNA profiles was omitted, because quantitative differences appeared to be small and qualitative results appeared difficult to interpret, especially in large-scale monitoring. Relationships between below-ground biodiversity, in terms of species richness and function, are still not clear. , 2001). , 2000). Fundamental research is still needed to clarify the importance of soil biodiversity. Species identity (community structure) is probably more important than species richness, but is more difficult to analyse.

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