Table 3 Attributes considered for categorizing full-text articles
Study type | Comparison between invaded and non-invaded plots | Comparison between invaded and invader removal plots | Comparison between non-invaded and invader transplanted plots | |
|---|---|---|---|---|
Study location | ||||
Latitude | ||||
Longitude | ||||
Distance from major urban or industrial centers | ||||
response variable(s) | ||||
Study type | lab* | field | ||
Study settings | observational | experimental | ||
Spatial scale - extent | <1 km2 | 1-100 km2 | spanning area >100 km2 | |
Spatial scale – grain ( size of plots) | plots <1 m | plots >1 m | individual | sub-individual (i.e. portions of an individual) |
Description of the hierarchical design - space | ||||
# of spatial scales included | 1 | 2 | >2 | |
Temporal scale - extent | ||||
Temporal scale - grain | ||||
Description of the hierarchical design - time | ||||
Number of temporal scales included | 1 | 2 | >2 | |
Design - replication (plot) | Non-replicated | Poorly replicated (n = 2) | sufficiently replicated (2 < n < 4) | Well replicated (n > 4) |
if well replicated: how many replicates? | ||||
Design - controls/reference sites | None | Procedural controls | Unmanipulated controls | Both |
Design - CI | ||||
How many Control sites? | ||||
How many Impacted sites? | ||||
Design - BA | ||||
How many times Before? | ||||
How many times After? | ||||
Design - BACI | ||||
if Beyond BACI: how many Control sites? | ||||
if Beyond BACI: how many Impacted sites? | ||||
if Beyond BACI: how many 'Before' times? | ||||
if Beyond BACI: how many 'After' times? | ||||
Design - confounding | Confounded | Not confounded | ||
If High probability of confounding, list confounders | ||||
Execution - specify the sampling method | ||||
Execution - sample independence | Not independent | Probably independent | Independent | |
Execution - treatment independence | Not independent [11] | Independent [11] | ||
Execution - randomisation (allocation of sampling units) | Neither | Haphazard | Random | |
Confounding variables | Certainly present | Likely present | Not present |