In 1997, Bryan Cosgrove, a student in Conservation Management at Stirling University, carried out research on the possible factors affecting the distribution of naturally-regenerating Scots pine and birch seedlings in Glen Affric.

Here is the abstract of Bryan's work, from his dissertation document:

Abstract

Following exclosure in 1996 of an area of Scots pine woodland in Glen Affric, a survey was undertaken to investigate regeneration progress. The survey revealed that in some areas of the woodland regeneration of Scots pine (Pinus sylvestris L) was being overtaken by birch (Betula sp) regeneration. The purpose of this project was to investigate possible reasons for this pattern of regeneration, with particular reference to soil nutrients.

The regeneration pattern of two areas within the exclosure were compared and soils were analysed for levels of nitrogen, phosphorus, potassium and organic matter. Peat depth and vegetation surveys of the areas were also undertaken.

Statistical analysis showed that there was a significant difference in pine regeneration between the two areas but no significant differences between the nutrient status or depth of the soil. One of the areas showed evidence of past burning and the possible effects of this on subsequent regeneration is discussed.

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