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Table 4 Variables used in the data analysis. Excludes intensity of harvest, which was tested only for uneven-aged forests

From: What are the effects of even-aged and uneven-aged forest management on boreal forest biodiversity in Fennoscandia and European Russia? A systematic review

Category Variable Description
First stage of analysis: At the forest management level (uneven-aged or even-aged)
 Publication bias Effect size  
 Effect modifiers related to study attributes Country  
Study year  
Sampling method  
Literature type Academic or grey literature
 Comparator Management type Natural, young even-aged forest, mature even-aged forest or retention forest
Second stage of analysis: At comparator forest level
 Species attributes Taxa Taxa that had at least two studies per comparator were analysed
Habitat specialism Forest dependent species, generalist, open habitat species, soil inhabiting species
 Forest attributes Deadwood Volume of deadwood
Uneven-aged management: Volume of deadwood in comparator forest when the comparator was young even-aged forest or retention; volume of deadwood in exposure forest when the comparator was mature even-aged or natural forest.
Even-aged management: Volume of deadwood in exposure forest in the case of all comparators
Years since harvest How many years ago the forest was harvested
Uneven-aged: time since exposure forest was harvested was used when comparator was natural forest or mature even-aged forest; time since comparator forest was harvested was used when comparator was young even-aged forest or retention
Even-aged: time since exposure forest was harvested was used with all comparators