| Ecosystem and CO2 enrichment system | Sampling protocol | DNA extraction kit | Bacterial abundance | Reference | ||||
| Individual soil cores | Bulked soil | Bulked DNA | MoBio | Fast | Other method | |||
| Planted grassland; Open top chambers |
| √ |
| √ |
|
| Reduced, NS | (Castro et al. 2010) |
| Aspen; FACE |
|
|
|
| √ |
| Reduced, NS | (Dunbar et al. 2014) |
| Heathland: FACE |
| √ |
|
|
| √ | Reduced, NS | (Haugwitz et al. 2014) |
| Native grassland; mini-FACE |
| √ |
| √ |
|
| Reduced, NS | (Hayden et al. 2012) |
| Mixed grassland dominated by Agrostis capillaris near to the CO2 vent; CO2 spring | √ |
|
|
|
| √ | Reduced, sig. | (Oppermann et al. 2010) |
| This paper | √ |
|
| √ |
|
| Reduced, sig. |
|
| This paper | √ |
|
|
| √ |
| Reduced, sig. |
|
| This paper |
| √ |
| √ |
|
| Reduced, NS |
|
| This paper |
| √ |
|
| √ |
| Increased, NS |
|
| This paper |
|
| √ | √ |
|
| Reduced, NS |
|
| This paper |
|
| √ |
| |
| Reduced, NS |
|