Survey data for birds, bryophytes, lichens, vascular plants and stand structures from 40 Scots pine and Norway spruce stands in southern Sweden.
File names are: bird.csv, bryophyte.csv, epilichen.csv, vascularpl.csv and stand_structures.csv.
Data set 'bird.csv' has 40 rows and 29 columns. Data set 'bryophyte.csv' has 40 rows and 87 columns. Data set 'epilichen.csv' has 40 rows and 60 columns. 
Data set 'vascularpl.csv' has 40 rows and 105 columns. Data set 'stand_structures.csv' has 40 rows and 7 columns. 

All data sets have a column "stand", which consist of stand IDs which can be used to connect the different data sets with each other. 
Information about tree species and stand age class is also provided in the data. 
For bird species common English names are used. Scientific names are used for vascular plants (SLU Dyntaxa 2019), bryophytes (Hallingbäck 2006) and 
lichens (Santesson's Checklist of Fennoscandian Lichen-forming and Lichenicolous Fungi 2020).

Data was collected during summer of 2016 (birds, bryophytes, vascular plants and forest structure data) 
and during summer of 2017 (lichen data and forest structure data). 
Data consist of information from forty stands. In each stand, 10 plots of 100m2 were used for inventoring bryophytes and vascular plants 
and 10 trees were surveyed for epiphytic lichens (including branches, up to two metres). 
Birds were surveyed in four plots per stand within a radius of 40 meters. 
In the data sets, absence-presence data for the whole stand is shown (i.e. when pooling all plots/trees together). 
Forest structures were measured within a radius of 10-15 meters (dead wood in 100 m2 plots) in 10 plots per stand. 
Column name explaination: 'stand' = stand-ID, 'tree' = tree species, 'age' = stand age, 'basal_area' = basal area, 
'stem_density' = stem densities (stems > 4 cm diameter) and 'wood' = dead wood in m3 (snags, lying wood).  
The column 'canopy_cover' shows the average canopy cover calculated from 10 hemispherical photos per stand.
The data set 'stand_structures' shows hectare values based on the average from the plots. 

Stands were selected based on site index (SI 24-29 for Norway spruce) from forest owner management plans. 
Only stands on till soil with rhyolite or granite bedrock were selected for the study.

For details about study design, species inventories and stand selection see following publications:

*Birds*
Lindbladh M, Petersson L, Hedwall P-O, Trubins R, Holmström E, Felton A. 
Consequences for bird diversity from a decrease in a foundation species—replacing Scots pine stands with Norway spruce in southern Sweden. 
Regional Environmental Change. 2019;19(5):1429-40. doi: 10.1007/s10113-019-01480-0.

*Bryophytes*
Petersson L, Nilsson S, Holmström E, Lindbladh M, Felton A. 
Forest floor bryophyte and lichen diversity in Scots pine and Norway spruce production forests. 
Forest Ecology and Management. 2021;493:119210. doi: 10.1016/j.foreco.2021.119210.

*Epiphytic lichens*
Petersson L, Lariviere D, Holmström E, Fritz Ö, Felton A. 
Conifer tree species and age as drivers of epiphytic lichen communities in northern European production forests. 
The Lichenologist. 2022;54(3-4):213-25. Epub 2022/07/29. doi: 10.1017/S0024282922000172.

*Vascular plants*
Petersson L, Holmström E, Lindbladh M, Felton A. 
Tree species impact on understory vegetation: Vascular plant communities of Scots pine and Norway spruce managed stands in northern Europe. 
Forest Ecology and Management. 2019;448:330-45. doi.org/10.1016/j.foreco.2019.06.011

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References

Hallingbäck, T. S., Hedenäs, L., Weibull, H. Ny checklista för Sveriges mossor. Svensk botanisk tidskrift, 2006, 100.2: 96-148.