Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 79. (Budapest 1987)

Debreczy, Zs.: Fluctuating-dynamic equilibrium of photophil, xerophil rupicolous plant communities and scrub woods at the lower arid woodland limit

Fig. 2. Schematic illustration of the scrub wood succession (I-III) to closed manna ash-pubescent oak wood, Orno-Quercetum (IV) according to JAKUCS 1972 p. 206: "Polycormon succession of the xeroseries in space and time".

.. Ill a-d: "further fluctuation in space and time in phase III"; b: the slow spread and separation of the scrub wood begins with an initial cone-shaped opening of the inner part. JAKUCS writes as follows (originally in German): „Following its spread in space and internal ageing, the polycormon system (scrub wood patch) (a) is loosened. The destructicned shoots shows that the foliage becomes thinner due to the influence of exogenous meso- and microclimate factors, and the dry microclimate penetrates into the soil of the scrub wood patch in the funnel-shaped opening. Parallel with the spread of the patch, a larges opening with a particularly dry and warm microclimate develops in the previously closed scrub wood patch indicated by the rupicolous species that settle there (b). After a given period the Cotinus Ring also disintegrates and its parts develop into separate scrub-wood patches (c). With this, the fluctuation in time and space begins over again." a-, the "a" and "d" phases illustrated together with the soil