Assessing stone walls habitat quality – Which factors affect bryophytes and macrolichens on farmland stone walls in Ireland?

•Stone walls are ubiquitous features in European agricultural landscapes.•Bryophytes and macrolichens can be used as proxies of stone wall habitat quality.•Farm management variables and altitude relate to bryophytes and macrolichens in stone walls.•Results, if confirmed, can guide actions for improving quality of stone walls.