Table 3 Data we plan to extract from studies and indication of which data will be used in study validity assessment
From: Management of UK priority invasive alien plants: a systematic review protocol
| Variable | Description | Used in study validity assessment |
|---|---|---|
| Country | Country/countries where study was carried out | No |
| Latitude | Latitude of site(s) used in study | No |
| Longitude | Longitude of site(s) used in study | No |
| Start date | Date on which management intervention was first implemented (If only month is specified the date will only record the month and year) | No |
| End date | Date on which implementation of management intervention ceased/was carried out for the final time (If only month is specified the date will only record the month and year) | No |
| Invasive plant species | Accepted Latin binomial name for focal invasive species | No |
| Ecosystem type | Ecosystem type in which study was undertaken - following the IUCN habitat classification scheme (https://www.iucnredlist.org/resources/habitat-classification-scheme) | No |
| Management intervention | Name of management intervention - based on management intervention classification scheme (see Additional file 2 for more details of this) | No |
| Frequency of management intervention | Number of times year−1 that a management intervention was carried out | No |
| Intensity of management intervention | The intensity at which a management intervention was carried out (e.g. Grazed with 4 sheep ha−1 year−1) | No |
| Area over which intervention was applied | Area in ha over which a management intervention was applied | No |
| Controlled/not controlled | A study which compares outcomes in a location where a management intervention has been used with an area where no management intervention was used | Yes |
| Before-and-after | A study which compares outcomes between a time when no management intervention was used and a time when the management intervention was used at a later time point | Yes |
| Experimental/correlative study | Is the study experimental or correlative? (see text for definition of these terms). | Yes |
| Randomization | Randomized/not randomized | Yes |
| Pairing | Paired/unpaired (for correlative studies) | Yes |
| Blocking | Blocked/unblocked (for manipulative studies) | Yes |
| Size of sampling unit | Size in m2 of sampling unit (e.g. plot) used to collect data | No |
| Homogeneity of plot sizes used | Homogenous/not homogenous | Yes |
| Number of replicates | Number of replicate sample units in each comparative group | No |
| Distance between replicate plots | Distance in km between different plots used to investigate the same treatment | No |
| Distance between treatments | Distance in km between plots used to investigate different treatments | No |
| Greenhouse/field study | Was the study carried out in a greenhouse or in the field? | No |
| Duration of study | Number of years after management intervention for which results were monitored | No |
| Confounding factors | Were there any severely confounding factors? (yes, partially, no, unclear) | Yes |
| Outcomes | For a full list of outcomes that we will consider see our outcome classification scheme in Additional file 3 |