TY - JOUR

T1 - An examination of the biodiversity-ecosystem function relationship in arable soil microbial communities

AU - Griffiths, B.S.

AU - Ritz, Karl

AU - Wheatley, R.

AU - Kuan, H.L.

AU - Boag, B.

AU - Christensen, Søren

AU - Ekelund, Flemming

AU - Sørensen, Søren Johannes

AU - Muller, S.

AU - Bloem, Jaap

N1 - Author Keywords: Biodiversity; Function; Stability; Bacteria; Fungi; Protozoa

PY - 2001

Y1 - 2001

N2 - Microbial communities differing in biodiversity were established by inoculating sterile agricultural soil with serially diluted soil suspensions prepared from the parent soil. Three replicate communities of each dilution were allowed to establish an equivalent microbial biomass by incubation for 9 months at 15°C, after which the biodiversity-ecosystem function relationship was examined for a range of soil processes. Biodiversity was determined by monitoring cultivable bacterial and fungal morphotypes, directly extracted eubacterial DNA and protozoan taxa. In the context of this study biodiversity relates to the numbers and proportions of different microbial species. Biodiversity decreased by ca. 15, 40 and 60% at each successive dilution step. There was no consistent effect of biodiversity on a range of soil processes measured (incorporation of thymidine and leucine, potential nitrification, nitrate accumulation, respiratory growth response, community level physiological profile and decomposition). Neither was there a direct effect of biodiversity on the variability of the processes, nor on the stability of decomposition when the soils were perturbed by heat or copper. The biodiversity of, and inter-relationships within, the microbial communities was such that the experimental reductions had no direct effects on soil function.

AB - Microbial communities differing in biodiversity were established by inoculating sterile agricultural soil with serially diluted soil suspensions prepared from the parent soil. Three replicate communities of each dilution were allowed to establish an equivalent microbial biomass by incubation for 9 months at 15°C, after which the biodiversity-ecosystem function relationship was examined for a range of soil processes. Biodiversity was determined by monitoring cultivable bacterial and fungal morphotypes, directly extracted eubacterial DNA and protozoan taxa. In the context of this study biodiversity relates to the numbers and proportions of different microbial species. Biodiversity decreased by ca. 15, 40 and 60% at each successive dilution step. There was no consistent effect of biodiversity on a range of soil processes measured (incorporation of thymidine and leucine, potential nitrification, nitrate accumulation, respiratory growth response, community level physiological profile and decomposition). Neither was there a direct effect of biodiversity on the variability of the processes, nor on the stability of decomposition when the soils were perturbed by heat or copper. The biodiversity of, and inter-relationships within, the microbial communities was such that the experimental reductions had no direct effects on soil function.

U2 - 10.1016/S0038-0717(01)00094-3

DO - 10.1016/S0038-0717(01)00094-3

M3 - Journal article

VL - 33

SP - 1713

EP - 1722

JO - Soil Biology & Biochemistry

JF - Soil Biology & Biochemistry

SN - 0038-0717

IS - 12-13

ER -