ABSTRACT

Introduction

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.

Methods

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).

Results

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.

Conclusions

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.

中文翻译：

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基本苔藓植物记录如何提供有关关键保护地点重大变化的信息：以具有国际意义的英格兰埃平森林为例

摘要

介绍

苔藓植物的基本记录包括编制一份在实地考察期间发现的简单物种清单。本研究的目的是调查这些记录作为保护区状况变化证据的价值。

方法

研究区域包括英国埃平森林，该地区自约 1800 年起就开始临时进行基本的苔藓植物记录，并于 2022 年 1 月再次进行。分析中总共包括 224 个物种，每个物种都被归类为在2022 年 1 月的调查或仅在之前的记录中发现。每个物种的艾伦伯格指标值均来自已发表的文献。为了调查 Ellenberg 指标是否是 2022 年 1 月调查期间是否发现某个物种的重要预测因子，构建了二项式广义线性模型（模型 1）。产生了第二个类似的模型，排除了附生植物（模型 2）。

结果

关于 2022 年 1 月期间发现某个物种的可能性，模型 1 表明与水分和酸度存在高度显着的负相关关系，与氮存在高度显着的正相关关系。模型 2 提供了类似的结果，只是湿度不显着。

结论

基本的苔藓植物记录表明，埃平森林的状况发生了重大变化，成为酸性较低、营养丰富的地区。这与已知的二氧化​​硫污染减少和硝化作用增加是一致的。