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Basic recording of bryophytes involves compiling a simple list of species found during a site visit. The aim of this study was to investigate the value of such records as evidence of change in the condition of protected areas. The study area comprised Epping Forest, UK, where basic bryophyte recording has been undertaken  ad hoc  since ca 1800 and was again carried out in January 2022. A total of 224 species were included within the analysis, each categorised as either having been found during the surveys in January 2022 or only found during previous recording. Ellenberg indicator values for each species were derived from published literature. To investigate if any of the Ellenberg indicators were significant predictors of whether or not a species was found during the January 2022 surveys, a binomial generalised linear model was constructed (model 1). A second similar model was produced that excluded epiphytes (model 2). Regarding the likelihood of a species having been found during January 2022, model 1 indicated that there were highly significant negative relationships with moisture and acidity, and a highly significant positive relationship with nitrogen. Model 2 provided similar results except that moisture was insignificant. Basic bryophyte records indicated that the condition of Epping Forest has undergone significant change, to become a site that is less acidic and more nutrient rich. This is consistent with a known decline in sulphur dioxide pollution and an increase in nitrification.

journal of bryology

How basic bryophyte recording provides information on major changes in key conservation localities: a case study of Epping Forest, England, an internationally significant site