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Table 5 Pre-tested data sheet for extracting data from the final list of accepted articles

From: How effective are perches in promoting bird-mediated seed dispersal for natural forest regeneration? A systematic review protocol

Component

Label

Type

Description

Publication details

Study_no

Numerical

ID number

 

Title

Free text

Title of the publication

 

Lead_author

Free text

Name of the primary/first author

 

Email

Free text

Email address of the primary/first author

 

Pub_Year

Date

Year of publication

 

Pub_type

Categorical

Type of publication

Study details

Year

Date

Year study was conducted

 

Country

Categorical

Country where the study was conducted

 

Lat

Numerical

Latitude in decimal degrees

 

Long

Numerical

Longitude in decimal degrees

 

Elevation

Numerical

Elevation in m.a.s.l

Set-up

Int_type

Categorical

Intervention type

 

Height

Numerical

Perch height in meters

 

Treesp

Free text

If intervention is isolated tree, indicate tree species

 

Matrix

Categorical

Habitat type of the matrix

 

Forest

Categorical

Type of forest

 

Ctrl_size

Numerical

Number of samples for the control

 

Int_size

Numerical

Number of samples for the intervention

 

Distance

Numerical

Distance of perch to nearest forest in meters

 

Length

Numerical

Length of experiment in days

 

Method

Categorical

Method used in the study

Outcome

Out_type

Categorical

Type of outcome measured

 

Out_spec

Free text

Notes on the specificity of outcome measured, whether the seeds or seedlings are native species, bird-dispersed, etc

 

Unit

Free text

Unit of the mean values

 

Int_mean

Numerical

Mean value of the intervention

 

Ctrl_mean

Numerical

Mean value of the control

 

Variance

Categorical

Type of variance measured

 

Int_var

Numerical

Variance of the intervention

 

Ctrl_var

Numerical

Variance of the control

 

Stat_test

Free text

If mean and error not provided, input test statistics used for analysis and degrees of freedom

 

Stat_value

Numerical

If mean and error not provided, input value of the statistical test used

 

p-value

Numerical

If mean and error not provided, input probability measure used for hypothesis testing

 

Other_var

Free text

Confounding variable that may affect the results

 

Notes

Free text

General notes on reliability, data availability, limitations, assumptions

  1. Categorical data fields have pre-coded options available