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Table 3 Criteria for critical appraisal and data extraction from studies selected after full text screening

From: Comparative effectiveness of silvicultural interventions for increasing timber production and sustaining conservation values in natural tropical production forests. A systematic review protocol

Main sections Criteria for critical appraisal Data extracted
Description of the study site   Latitude and longitude of sites
   Data on climate, topography, geology and soils
   Population size, main cities, main economic activities
Population   Type of forest indicated from which a standard list can be compiled for ease of comparison
   Basal area, timber volume before logging, biomass, number of trees, and other inventory metrics (to be developed iteratively)
Methods Clear and repeatable methodology Number of plots, treatments, blocks, replications (see also below)
  Adequate description of silvicultural treatments Logging intensity (m3/ha, basal area removed, number of trees removed, biomass removed)
  Replication - at least 3 plots or treatments Number of plots/treatment
  Outcome measured after intervention Number of years after silvicultural intervention
  Spatial autocorrelation between transects  
Results Validity or reliability of data Data for mean and SD
   Size of the sample
  Randomized sample Y/N
  Variables measured allow the effect of the intervention to be assessed  
   % recovery of timber volume
   % recovery of biomass
   Biodiversity (floristic, faunistic, indicators)
   Other quantification or indicators of ecosystem services
   Measures of socio-economic outcome (including poverty, human health & well-being, livelihoods, social capital, social welfare, empowerment, equity, based on Pullin et al. (2013) [14])
   Type of models (matrix, individual based)