In my previous post on Acute Oak Decline I posed the question of whether ecological factors are predisposing oaks to this “new” disease. My concern is that research groups led by the plant pathologists will remain focused on the disease model and not consider the ecology of the problem. I encourage scientists studying Acute Oak Decline to pause for a moment, take a breath, and consider things like rain pH, soil fertility, and ecosystem structure before launching into a costly vortex of biological studies on whatever bacterial species is determined to be the “cause”.
In this post I would like to present some preliminary findings of soil fertility in a stand of diseased and non-diseased English oaks (Quercus robur) in Bushy Park, London, UK. Several oaks showed bleeding symptoms characteristic of Acute Oak Decline (see photos below), although the bacterial species was not positively ID’d.
Upon inspecting the soils I noticed that near the diseased trees there were large mats of mosses, whereas few mosses were found around the non-diseased oaks. Having a strong interest in the influence that mosses may have on soil fertility, and thus oak health, I, along with Neville Fay of Treework Environmental Practice and Vinodh Krishnamurthy of Soil Foodweb Lab Services and Research, devised a simple test. Read the rest of this entry »