Data from: Disentangling plant and soil microbial controls on carbon and nitrogen loss in grassland mesocosms
| Main Authors: | de Vries, Franciska T., Bracht Jorgensen, Helene, Hedlund, Katarina, Bardgett, Richard D. |
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| Format: | info dataset Journal |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4958703 |
Daftar Isi:
- 1. It is well known that plant–soil interactions play an important role in determining the impact of global change phenomena on biodiversity and ecosystem functioning. Little is known, however, about the individual and relative importance for carbon (C) and nitrogen (N) cycling of non-random changes in plant and soil communities that result from global change phenomena, such as fertilization and agricultural intensification. 2. We set up a field-based mesocosm experiment in which we re-inoculated soil with contrasting microbial communities taken from extensively managed and from intensively managed grasslands. In a full-factorial design, we subsequently established plant communities representative of intensively and extensively managed grasslands and imposed a fertilization treatment. We then measured plant biomass and diversity, and leaching of C and N as key measures of C and N loss. 3. We hypothesized that non-random changes in both microbial and plant communities would impact C and N leaching, but via different mechanisms. We predicted that plant communities representative of extensively managed grassland would reduce C and N leaching directly through increased water or N uptake, or indirectly via promoting microbial communities that immobilize C and N, whereas plant communities of intensively managed grassland would have the opposite effect. We also hypothesized that microbial communities of extensively managed grassland would feed back positively to plant diversity and that 'matching' plant and microbial communities would reduce C and N leaching. 4. We found that both plant and microbial communities from extensively managed grassland reduced C and N leaching, especially when 'matched'. Plant community effects on C and N leaching operated directly through root C inputs and N uptake, rather than through changes in soil microbial communities. In contrast, microbial communities modified C and N leaching both directly by immobilization and indirectly through modifying plant community composition. 5. Synthesis. Our results show that changes in plant and microbial communities both individually and interactively modify C and N loss from grasslands. Moreover, our results suggest that soil microbial communities typical of extensively managed grassland might counteract, or delay, the negative consequences of fertilization on plant diversity and ecosystem functioning.
- Soil and plants 2010Contains data for the first year of the experiment, including soil analyses immediately after inoculation with microbial communities but before planting with plant communities, total biomass data for the first harvest (August 2010) and biomass data for all individual species for the second harvest (October 2010). See ReadMe file for variable names and descriptions.Soil and plants 2011Contains data for the second and final year of the experiment. This includes all soil and vegetation data for the final destructive harvest in October 2011. See ReadMe file for names and description of variables.LeachatesThis file contains leachate data for the mesocosms. Leachates were collected non-destructively at 7 dates in 2011. See ReadMe file for names and description of variables.PLFAsThis file contains PLFA profiles for mesocosms, analysed in soil samples from the final destructive harvest on October 2011. See ReadMe file for more information on this file.